chore(release): v2.4.40 — optional line items on issued orders

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/release.md

@@ -46,6 +46,17 @@ without explicit user confirmation.**
    errors from prior pids).
 9. Clean up tarballs locally and in `/tmp/` on the server.
 
+**nginx is NOT part of a normal release.** nginx is only a reverse proxy in
+front of the pm2 app (`proxy_pass` → `127.0.0.1:3001`); a code release changes
+app code, which `pm2 restart app-ts` picks up — nginx has nothing new to read.
+Do **not** run `sudo nginx -t && sudo systemctl reload nginx` every deploy. Run
+it ONLY when you actually edit nginx config (`/etc/nginx/…` — `server_name`,
+ports, `proxy_pass` upstream, TLS cert paths, locations/redirects/headers,
+`client_max_body_size`, rate limits, etc.). When you do change it, always
+`nginx -t` first (validates syntax, changes nothing) THEN `systemctl reload
+nginx` (graceful re-read, keeps active connections; a bad config on reload is
+rejected and the old one keeps running).
+
 Risky releases (framework jumps, FK/constraint-altering migrations) get a
 read-only pre-flight first: `prisma migrate status` on prod, verify FK
 constraint names the migration DROPs, check no data violates new

docs/superpowers/plans/2026-06-16-per-document-custom-field-selection.md

@@ -0,0 +1,789 @@
+# Per-document custom-field print selection — Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Let each offer, issued order, and invoice choose — on its detail page — which company custom fields print in its PDF sender block; default none selected.
+
+**Architecture:** A new nullable `selected_custom_fields` column (JSON-array-in-VARCHAR) on `quotations`, `issued_orders`, `invoices`. A shared backend util encodes/decodes the index array. Create/update services persist it; detail services decode it to `number[]`. The PDF `buildAddressLines()` company-block builder gains an optional selected-indices filter. A shared React picker reused by the three detail pages drives the selection.
+
+**Tech Stack:** Prisma 7 / MySQL, Fastify 5, Zod 4, Vitest (real `app_test` DB), React 19 + MUI v7 + React Query.
+
+**Spec:** `docs/superpowers/specs/2026-06-16-per-document-custom-field-selection-design.md`
+
+---
+
+## Conventions for this plan
+
+- This shell is non-interactive — `prisma migrate dev` is forbidden. Use the `migrate diff` recipe (Task 1).
+- **Before the migration, ask the user to stop their dev server and wait for confirmation** (it holds DB connections). Do not run the migration until they confirm.
+- Server tests run against `app_test` via `.env.test` (`npm test`). Apply the migration to `app_test` too or the suite breaks.
+- `npm run typecheck` = `tsc -b --noEmit`. `npm run lint` must stay at 0 errors.
+- Selection semantics in `buildAddressLines`: param **omitted/`undefined`** ⇒ show ALL custom fields (unchanged behavior — used for customer/supplier blocks). Param is an **array** (possibly empty) ⇒ show ONLY those indices (used for the company/sender block; empty ⇒ none).
+
+---
+
+## File Structure
+
+- **Modify** `prisma/schema.prisma` — add `selected_custom_fields String?` to `quotations`, `issued_orders`, `invoices`.
+- **Create** `prisma/migrations/<ts>_add_selected_custom_fields/migration.sql`.
+- **Modify** `src/utils/custom-fields.ts` — add `encodeSelectedCustomFields` / `parseSelectedCustomFields`.
+- **Create** `src/__tests__/selected-custom-fields.test.ts` — util + integration coverage.
+- **Modify** `src/schemas/offers.schema.ts`, `issued-orders.schema.ts`, `invoices.schema.ts` — new optional array field.
+- **Modify** `src/services/offers.service.ts`, `issued-orders.service.ts`, `invoices.service.ts` — persist on create/update, decode in detail.
+- **Modify** `src/routes/admin/offers-pdf.ts`, `issued-orders-pdf.ts`, `invoices-pdf.ts` — filter company custom lines.
+- **Modify** `src/admin/lib/queries/offers.ts`, `issued-orders.ts`, `invoices.ts` — add `selected_custom_fields: number[]` to detail interfaces.
+- **Create** `src/admin/components/document/CustomFieldsPrintPicker.tsx` — shared picker.
+- **Modify** `src/admin/pages/OfferDetail.tsx`, `IssuedOrderDetail.tsx`, `InvoiceDetail.tsx` — render picker, wire into save payload.
+
+---
+
+## Task 1: Schema column + migration
+
+**Files:**
+
+- Modify: `prisma/schema.prisma` (models `quotations`, `issued_orders`, `invoices`)
+- Create: `prisma/migrations/<yyyyMMddHHmmss>_add_selected_custom_fields/migration.sql`
+
+- [ ] **Step 1: Ask the user to stop their dev server**
+
+Post: "Please stop your dev server so I can apply a migration, and tell me when it's stopped." Wait for confirmation before any later `migrate deploy` step.
+
+- [ ] **Step 2: Add the column to each model in `prisma/schema.prisma`**
+
+Add this line to the `quotations` model (near other scalar columns, e.g. after `language`):
+
+```prisma
+  selected_custom_fields String? @db.VarChar(255)
+```
+
+Add the identical line to the `issued_orders` model and to the `invoices` model.
+
+- [ ] **Step 3: Generate the migration SQL**
+
+Run (Git Bash):
+
+```bash
+cd /d/cortex/boha-app-ts
+TS=$(date +%Y%m%d%H%M%S)
+mkdir -p "prisma/migrations/${TS}_add_selected_custom_fields"
+npx prisma migrate diff --from-config-datasource --to-schema prisma/schema.prisma --script \
+  > "prisma/migrations/${TS}_add_selected_custom_fields/migration.sql"
+```
+
+Expected: a `migration.sql` containing three `ALTER TABLE … ADD COLUMN selected_custom_fields VARCHAR(255) NULL` statements (one per table). Open it and confirm it touches ONLY `quotations`, `issued_orders`, `invoices` and adds nothing else (no BOM — if it was written via PowerShell, strip the BOM).
+
+- [ ] **Step 4: Apply to dev DB + regenerate client (after user confirmed server stopped)**
+
+```bash
+npx prisma migrate deploy
+npx prisma generate
+```
+
+Expected: "All migrations have been applied" and a regenerated client.
+
+- [ ] **Step 5: Apply to the test DB**
+
+```bash
+DATABASE_URL="$(grep -m1 '^DATABASE_URL' .env.test | cut -d= -f2- | tr -d '"')" npx prisma migrate deploy
+```
+
+Expected: the same migration applied to `app_test`. (If the env parsing is awkward on this shell, temporarily set `DATABASE_URL` to the app_test URL from `.env.test` and run `npx prisma migrate deploy`.)
+
+- [ ] **Step 6: Typecheck**
+
+Run: `npm run typecheck`
+Expected: PASS (the new Prisma field is now known to the client).
+
+- [ ] **Step 7: Commit**
+
+```bash
+git add prisma/schema.prisma prisma/migrations
+git commit -m "feat(documents): add selected_custom_fields column to quotations/issued_orders/invoices"
+```
+
+---
+
+## Task 2: Backend encode/decode util (TDD)
+
+**Files:**
+
+- Modify: `src/utils/custom-fields.ts`
+- Test: `src/__tests__/selected-custom-fields.test.ts`
+
+- [ ] **Step 1: Write the failing test**
+
+Create `src/__tests__/selected-custom-fields.test.ts`:
+
+```ts
+import { describe, it, expect } from "vitest";
+import {
+  encodeSelectedCustomFields,
+  parseSelectedCustomFields,
+} from "../utils/custom-fields";
+
+describe("selected custom fields encode/decode", () => {
+  it("encodes a non-empty index array to a JSON string", () => {
+    expect(encodeSelectedCustomFields([0, 2])).toBe("[0,2]");
+  });
+
+  it("encodes empty / non-array to null", () => {
+    expect(encodeSelectedCustomFields([])).toBeNull();
+    expect(encodeSelectedCustomFields(undefined)).toBeNull();
+    expect(encodeSelectedCustomFields("nope")).toBeNull();
+  });
+
+  it("dedupes, sorts, and drops invalid entries before encoding", () => {
+    expect(encodeSelectedCustomFields([2, 0, 2, -1, 1.5, 3])).toBe("[0,2,3]");
+  });
+
+  it("parses a stored string back to a number array", () => {
+    expect(parseSelectedCustomFields("[0,2]")).toEqual([0, 2]);
+  });
+
+  it("parses null / malformed to an empty array", () => {
+    expect(parseSelectedCustomFields(null)).toEqual([]);
+    expect(parseSelectedCustomFields("")).toEqual([]);
+    expect(parseSelectedCustomFields("{garbage")).toEqual([]);
+    expect(parseSelectedCustomFields('"x"')).toEqual([]);
+  });
+
+  it("parses already-array input (defensive) and filters invalid", () => {
+    expect(parseSelectedCustomFields([0, "1", 2, -3] as unknown)).toEqual([
+      0, 2,
+    ]);
+  });
+});
+```
+
+- [ ] **Step 2: Run it to confirm failure**
+
+Run: `npm test -- selected-custom-fields`
+Expected: FAIL — `encodeSelectedCustomFields is not a function`.
+
+- [ ] **Step 3: Implement the helpers**
+
+Append to `src/utils/custom-fields.ts`:
+
+```ts
+/**
+ * Per-document selection of which COMPANY custom fields print on a PDF.
+ * Stored positionally (matching the `custom_<i>` keys the PDF builder emits)
+ * as a JSON array string, e.g. "[0,2]". Null/empty means "none selected".
+ */
+export function encodeSelectedCustomFields(indices: unknown): string | null {
+  const clean = normalizeIndices(indices);
+  return clean.length > 0 ? JSON.stringify(clean) : null;
+}
+
+/** Decode the stored selection (string OR defensive array) into a clean number[]. */
+export function parseSelectedCustomFields(raw: unknown): number[] {
+  if (raw == null) return [];
+  if (Array.isArray(raw)) return normalizeIndices(raw);
+  if (typeof raw !== "string" || raw.trim() === "") return [];
+  try {
+    return normalizeIndices(JSON.parse(raw));
+  } catch {
+    // Malformed JSON in a selection column degrades to "none" (expected
+    // condition — a hand-edited/legacy row should never 500 a PDF render).
+    return [];
+  }
+}
+
+function normalizeIndices(input: unknown): number[] {
+  if (!Array.isArray(input)) return [];
+  const set = new Set<number>();
+  for (const v of input) {
+    if (typeof v === "number" && Number.isInteger(v) && v >= 0) set.add(v);
+  }
+  return [...set].sort((a, b) => a - b);
+}
+```
+
+- [ ] **Step 4: Run the test to confirm it passes**
+
+Run: `npm test -- selected-custom-fields`
+Expected: PASS (all util cases).
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/utils/custom-fields.ts src/__tests__/selected-custom-fields.test.ts
+git commit -m "feat(documents): selected-custom-fields encode/decode helpers"
+```
+
+---
+
+## Task 3: Zod schemas
+
+**Files:**
+
+- Modify: `src/schemas/offers.schema.ts`
+- Modify: `src/schemas/issued-orders.schema.ts`
+- Modify: `src/schemas/invoices.schema.ts`
+
+- [ ] **Step 1: Offers schema**
+
+In `src/schemas/offers.schema.ts`, inside `CreateQuotationSchema`, add after the `sections` line (line 50):
+
+```ts
+  // Positional indices of company custom fields to print on this document's
+  // PDF. Omitted/empty ⇒ none. Update schema derives via .partial().
+  selected_custom_fields: z.array(z.number().int().nonnegative()).max(200).optional(),
+```
+
+(`UpdateQuotationSchema` already derives from this via `.partial().omit({ quotation_number: true })` — no change needed there.)
+
+- [ ] **Step 2: Issued-orders schema**
+
+In `src/schemas/issued-orders.schema.ts`, inside `CreateIssuedOrderSchema`, add after the `sections` field:
+
+```ts
+  selected_custom_fields: z.array(z.number().int().nonnegative()).max(200).optional(),
+```
+
+(`UpdateIssuedOrderSchema` derives via `.partial()` — no change.)
+
+- [ ] **Step 3: Invoices schema**
+
+In `src/schemas/invoices.schema.ts`, add the same line to BOTH `CreateInvoiceSchema` (after its `sections` field) and `UpdateInvoiceSchema` (after its `sections` field — invoices define the two schemas separately, so it must be added in both):
+
+```ts
+  selected_custom_fields: z.array(z.number().int().nonnegative()).max(200).optional(),
+```
+
+- [ ] **Step 4: Typecheck**
+
+Run: `npm run typecheck`
+Expected: PASS.
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/schemas/offers.schema.ts src/schemas/issued-orders.schema.ts src/schemas/invoices.schema.ts
+git commit -m "feat(documents): accept selected_custom_fields in document schemas"
+```
+
+---
+
+## Task 4: Services — persist on write, decode in detail (TDD)
+
+**Files:**
+
+- Modify: `src/services/offers.service.ts`
+- Modify: `src/services/issued-orders.service.ts`
+- Modify: `src/services/invoices.service.ts`
+- Test: `src/__tests__/selected-custom-fields.test.ts` (extend)
+
+- [ ] **Step 1: Add the import to all three services**
+
+At the top of each of the three service files, add (or extend the existing import from `../utils/custom-fields`):
+
+```ts
+import {
+  encodeSelectedCustomFields,
+  parseSelectedCustomFields,
+} from "../utils/custom-fields";
+```
+
+- [ ] **Step 2: Offers — persist on create**
+
+In `createOffer` (`src/services/offers.service.ts`), inside `tx.quotations.create({ data: { … } })`, add after `scope_description`:
+
+```ts
+          selected_custom_fields: encodeSelectedCustomFields(
+            body.selected_custom_fields,
+          ),
+```
+
+- [ ] **Step 3: Offers — persist on update**
+
+In `updateOffer`, inside the `const data = { … }` object (after `scope_description`, before `modified_at`), add:
+
+```ts
+    selected_custom_fields:
+      body.selected_custom_fields !== undefined
+        ? encodeSelectedCustomFields(body.selected_custom_fields)
+        : undefined,
+```
+
+(`undefined` = "key absent in payload, leave column untouched" — matches the sibling header fields.)
+
+- [ ] **Step 4: Offers — decode in detail**
+
+In `getOffer`, in the returned object (after `valid_transitions`), add:
+
+```ts
+    selected_custom_fields: parseSelectedCustomFields(rest.selected_custom_fields),
+```
+
+- [ ] **Step 5: Issued orders — persist + decode**
+
+In `src/services/issued-orders.service.ts`:
+
+- In `createIssuedOrder`, inside `tx.issued_orders.create({ data: { … } })`, add:
+  ```ts
+          selected_custom_fields: encodeSelectedCustomFields(
+            body.selected_custom_fields,
+          ),
+  ```
+- In `updateIssuedOrder`, inside the header `data` object passed to `issued_orders.update`, add:
+  ```ts
+      selected_custom_fields:
+        body.selected_custom_fields !== undefined
+          ? encodeSelectedCustomFields(body.selected_custom_fields)
+          : undefined,
+  ```
+- In `getIssuedOrder`, in the returned object (after `valid_transitions`), add:
+
+  ```ts
+    selected_custom_fields: parseSelectedCustomFields(rest.selected_custom_fields),
+  ```
+
+- [ ] **Step 6: Invoices — persist + decode**
+
+In `src/services/invoices.service.ts`:
+
+- In `createInvoice`, inside `tx.invoices.create({ data: { … } })`, add after `internal_notes`:
+  ```ts
+        selected_custom_fields: encodeSelectedCustomFields(
+          body.selected_custom_fields,
+        ),
+  ```
+- In `updateInvoice`, inside the first `if (editable) { … }` block (after the `tax_date` handling, still inside the block), add:
+  ```ts
+  if (body.selected_custom_fields !== undefined)
+    data.selected_custom_fields = encodeSelectedCustomFields(
+      body.selected_custom_fields,
+    );
+  ```
+- In `getInvoice`, in the returned object (after `valid_transitions`), add:
+
+  ```ts
+    selected_custom_fields: parseSelectedCustomFields(rest.selected_custom_fields),
+  ```
+
+- [ ] **Step 7: Extend the test with an offers round-trip (real DB)**
+
+Append to `src/__tests__/selected-custom-fields.test.ts`. Match the existing suite's fixture style — import the offers service directly and clean up. Use a far-future placeholder where the suite does; if an existing offers test helper exists, prefer it. Minimal version:
+
+```ts
+import { createOffer, getOffer } from "../services/offers.service";
+import { prisma } from "../config/prisma"; // adjust to the project's prisma export path
+
+describe("offers selected_custom_fields round-trip", () => {
+  const created: number[] = [];
+  afterAll(async () => {
+    if (created.length)
+      await prisma.quotations.deleteMany({ where: { id: { in: created } } });
+  });
+
+  it("persists selection on create and decodes it on detail", async () => {
+    const res = (await createOffer({
+      status: "draft",
+      selected_custom_fields: [2, 0, 0],
+    })) as { id: number };
+    created.push(res.id);
+
+    const row = await prisma.quotations.findUnique({ where: { id: res.id } });
+    expect(row?.selected_custom_fields).toBe("[0,2]");
+
+    const detail = await getOffer(res.id);
+    expect(detail?.selected_custom_fields).toEqual([0, 2]);
+  });
+
+  it("stores null when selection is empty", async () => {
+    const res = (await createOffer({
+      status: "draft",
+      selected_custom_fields: [],
+    })) as { id: number };
+    created.push(res.id);
+    const row = await prisma.quotations.findUnique({ where: { id: res.id } });
+    expect(row?.selected_custom_fields).toBeNull();
+  });
+});
+```
+
+> Before running: confirm the prisma import path (`../config/prisma` vs `../config/db` — grep an existing test). Adjust the import to match.
+
+- [ ] **Step 8: Run tests**
+
+Run: `npm test -- selected-custom-fields`
+Expected: PASS (util + offers round-trip). If FK constraints require a customer, the `customer_id`-less draft path above avoids them.
+
+- [ ] **Step 9: Typecheck + commit**
+
+```bash
+npm run typecheck
+git add src/services/offers.service.ts src/services/issued-orders.service.ts src/services/invoices.service.ts src/__tests__/selected-custom-fields.test.ts
+git commit -m "feat(documents): persist & expose selected_custom_fields in services"
+```
+
+---
+
+## Task 5: PDF rendering — filter company custom lines (TDD)
+
+**Files:**
+
+- Modify: `src/routes/admin/offers-pdf.ts`
+- Modify: `src/routes/admin/issued-orders-pdf.ts`
+- Modify: `src/routes/admin/invoices-pdf.ts`
+- Test: `src/__tests__/selected-custom-fields.test.ts` (extend, if a PDF render is unit-testable; otherwise assert via the helper — see Step 6)
+
+- [ ] **Step 1: Offers PDF — add the filter param to `buildAddressLines`**
+
+In `src/routes/admin/offers-pdf.ts`, change the signature (line 28-32):
+
+```ts
+function buildAddressLines(
+  entity: Record<string, unknown> | null,
+  isSupplier: boolean,
+  t: (key: string) => string,
+  selectedCustomFields?: number[],
+): AddressResult {
+```
+
+Then change the custom-field loop (lines 88-96) to skip non-selected indices when a selection array is provided:
+
+```ts
+const filterCustom = Array.isArray(selectedCustomFields);
+cfData.forEach((cf, i) => {
+  if (filterCustom && !selectedCustomFields!.includes(i)) return;
+  const cfName = (cf.name || "").trim();
+  const cfValue = (cf.value || "").trim();
+  const showLabel = cf.showLabel !== false;
+  if (cfValue) {
+    fieldMap[`custom_${i}`] =
+      showLabel && cfName ? `${cfName}: ${cfValue}` : cfValue;
+  }
+});
+```
+
+- [ ] **Step 2: Offers PDF — pass the document's selection into the COMPANY call**
+
+The offer's sender/company block is `supp` (`isSupplier: true` on `settings`). Update that call (lines 209-213) to pass the parsed selection; leave the customer call (`cust`) unchanged so customer custom fields still show in full:
+
+```ts
+const supp = buildAddressLines(
+  settings as unknown as Record<string, unknown>,
+  true,
+  t,
+  parseSelectedCustomFields(
+    (quotation as { selected_custom_fields?: unknown }).selected_custom_fields,
+  ),
+);
+```
+
+Add the import at the top of the file:
+
+```ts
+import { parseSelectedCustomFields } from "../../utils/custom-fields";
+```
+
+> Confirm `quotation` (the `OfferForPdf` payload the render function receives) is selected with the default field set so `selected_custom_fields` is present. It's a scalar column on `quotations`, so the default `findUnique`/`include` returns it — no `select` narrowing to adjust here.
+
+- [ ] **Step 3: Issued-orders PDF — same change on the COMPANY (buyer) block**
+
+In `src/routes/admin/issued-orders-pdf.ts`:
+
+- Add `selectedCustomFields?: number[]` as the last param of `buildAddressLines` and apply the identical `filterCustom` guard in its custom-field loop.
+- The company block is `buyer = buildAddressLines(settings, true, t)` (line 316). Change to:
+  ```ts
+  const buyer = buildAddressLines(
+    settings,
+    true,
+    t,
+    parseSelectedCustomFields(
+      (order as { selected_custom_fields?: unknown }).selected_custom_fields,
+    ),
+  );
+  ```
+- Leave `buildSupplierLines(...)` untouched (supplier fields keep showing in full).
+- Add `import { parseSelectedCustomFields } from "../../utils/custom-fields";`.
+
+> Confirm the render function's `order` param carries `selected_custom_fields`. If the route fetches the order via a narrow `select`, add `selected_custom_fields: true` to it; if it uses `include`/default scalars, it's already present. Grep the route's `issued_orders.findUnique`/`findFirst` before assuming.
+
+- [ ] **Step 4: Invoices PDF — same change on the COMPANY (supplier-of-invoice) block**
+
+In `src/routes/admin/invoices-pdf.ts`:
+
+- Add `selectedCustomFields?: number[]` as the last param of `buildAddressLines` and apply the identical `filterCustom` guard.
+- The company block is `supp = buildAddressLines(settings, true, t)` (line 457). Change to:
+  ```ts
+  const supp = buildAddressLines(
+    settings,
+    true,
+    t,
+    parseSelectedCustomFields(
+      (invoice as { selected_custom_fields?: unknown }).selected_custom_fields,
+    ),
+  );
+  ```
+- Leave `cust = buildAddressLines(customer, false, t)` untouched.
+- Note the separate `settings.custom_fields` read lower down (the "supplier email/web" extraction near line 469) is a DIFFERENT concern (pulls an email for a header line) — **do not** filter that; leave it as-is.
+- Add `import { parseSelectedCustomFields } from "../../utils/custom-fields";`.
+
+> Confirm `invoice` is fetched with default scalars (it is — `prisma.invoices.findUnique` without a narrowing `select` in this route), so `selected_custom_fields` is present.
+
+- [ ] **Step 5: Typecheck + lint**
+
+Run: `npm run typecheck && npm run lint`
+Expected: PASS, 0 lint errors.
+
+- [ ] **Step 6: Add a focused render assertion (extend the test file)**
+
+If the three PDF modules export their HTML render function (e.g. offers exports `renderOfferHtml`), add a test that renders with a stubbed settings object carrying two company custom fields and asserts only the selected one appears. Mock `html-to-pdf` per the suite convention; you're asserting on the returned HTML string, not a real PDF. Example for offers (adapt names to the actual export):
+
+```ts
+import { renderOfferHtml } from "../routes/admin/offers-pdf"; // confirm export name
+
+it("offer PDF prints only selected company custom fields", () => {
+  const settings = {
+    name: "Naše Firma s.r.o.",
+    custom_fields: JSON.stringify({
+      fields: [
+        { name: "Tel.", value: "123", showLabel: true },
+        { name: "Web", value: "example.cz", showLabel: true },
+      ],
+      field_order: [],
+    }),
+  };
+  const quotation = {
+    customers: null,
+    quotation_items: [],
+    scope_sections: [],
+    status: "draft",
+    currency: "CZK",
+    language: "cs",
+    selected_custom_fields: "[0]",
+  };
+  const html = renderOfferHtml(quotation as never, settings as never);
+  expect(html).toContain("Tel.: 123");
+  expect(html).not.toContain("example.cz");
+});
+```
+
+If the render function is NOT exported / not unit-testable without a DB, SKIP this step rather than forcing it — the util test (Task 2) plus the service round-trip (Task 4) already cover the data path; note in the commit that PDF filtering was verified manually. Do not export internals solely to test them if that breaks the module's encapsulation; prefer a manual verification note.
+
+- [ ] **Step 7: Commit**
+
+```bash
+git add src/routes/admin/offers-pdf.ts src/routes/admin/issued-orders-pdf.ts src/routes/admin/invoices-pdf.ts src/__tests__/selected-custom-fields.test.ts
+git commit -m "feat(documents): PDF prints only the document's selected company custom fields"
+```
+
+---
+
+## Task 6: Frontend — detail query types + shared picker
+
+**Files:**
+
+- Modify: `src/admin/lib/queries/offers.ts`, `issued-orders.ts`, `invoices.ts`
+- Create: `src/admin/components/document/CustomFieldsPrintPicker.tsx`
+
+- [ ] **Step 1: Add the field to the three detail interfaces**
+
+- `src/admin/lib/queries/offers.ts` — add to `OfferDetailData`:
+  ```ts
+  selected_custom_fields: number[];
+  ```
+- `src/admin/lib/queries/issued-orders.ts` — add to `IssuedOrderDetail`:
+  ```ts
+  selected_custom_fields: number[];
+  ```
+- `src/admin/lib/queries/invoices.ts` — add to `InvoiceDetail`:
+
+  ```ts
+  selected_custom_fields?: number[];
+  ```
+
+- [ ] **Step 2: Create the shared picker component**
+
+Create `src/admin/components/document/CustomFieldsPrintPicker.tsx`:
+
+```tsx
+import { FormControlLabel, Checkbox, Box, Typography } from "@mui/material";
+import type { CompanySettingsCustomField } from "../../lib/queries/settings";
+
+interface Props {
+  /** Company custom field definitions, in positional order (index = print key). */
+  fields: CompanySettingsCustomField[];
+  /** Currently selected positional indices. */
+  selected: number[];
+  /** Read-only (document not editable / locked by another user). */
+  disabled?: boolean;
+  onChange: (next: number[]) => void;
+}
+
+/**
+ * Per-document picker: choose which COMPANY custom fields print on this
+ * document's PDF. Selection is positional (matches the PDF `custom_<i>` keys).
+ * Renders nothing when the company has defined no custom fields.
+ */
+export default function CustomFieldsPrintPicker({
+  fields,
+  selected,
+  disabled = false,
+  onChange,
+}: Props) {
+  const printable = fields.filter((f) => (f.value || "").trim());
+  if (printable.length === 0) return null;
+
+  const toggle = (idx: number, checked: boolean) => {
+    const set = new Set(selected);
+    if (checked) set.add(idx);
+    else set.delete(idx);
+    onChange([...set].sort((a, b) => a - b));
+  };
+
+  return (
+    <Box>
+      <Typography variant="subtitle2" sx={{ mb: 0.5 }}>
+        Vlastní pole na PDF
+      </Typography>
+      {fields.map((f, idx) => {
+        if (!(f.value || "").trim()) return null;
+        const label = (f.name || "").trim() ? `${f.name}: ${f.value}` : f.value;
+        return (
+          <FormControlLabel
+            key={idx}
+            control={
+              <Checkbox
+                size="small"
+                checked={selected.includes(idx)}
+                disabled={disabled}
+                onChange={(e) => toggle(idx, e.target.checked)}
+              />
+            }
+            label={<Typography variant="body2">{label}</Typography>}
+          />
+        );
+      })}
+    </Box>
+  );
+}
+```
+
+> Note: indices are keyed off the FULL `fields` array (not the filtered `printable`) so they stay aligned with the PDF's `custom_<i>`, which also enumerates the full array. Empty-value fields are skipped visually but still consume their index.
+
+- [ ] **Step 3: Typecheck**
+
+Run: `npm run typecheck`
+Expected: PASS.
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add src/admin/lib/queries/offers.ts src/admin/lib/queries/issued-orders.ts src/admin/lib/queries/invoices.ts src/admin/components/document/CustomFieldsPrintPicker.tsx
+git commit -m "feat(documents): shared CustomFieldsPrintPicker + detail query types"
+```
+
+---
+
+## Task 7: Frontend — wire the picker into the three detail pages
+
+**Files:**
+
+- Modify: `src/admin/pages/OfferDetail.tsx`
+- Modify: `src/admin/pages/IssuedOrderDetail.tsx`
+- Modify: `src/admin/pages/InvoiceDetail.tsx`
+
+For EACH page, the same four edits. Detail below uses OfferDetail; repeat the pattern for the other two (their company-settings query and edit-lock/editable flags already exist on the page — reuse them; do not add new queries).
+
+- [ ] **Step 1: Import the picker (all three pages)**
+
+```ts
+import CustomFieldsPrintPicker from "../components/document/CustomFieldsPrintPicker";
+```
+
+- [ ] **Step 2: Seed local state from the loaded document**
+
+Add state near the page's other editable-field state, and seed it when the document loads (follow the page's existing seeding pattern — if it copies server data into state in an effect or on query success, add this alongside; if it derives form state via `useState` initializers keyed on the query, match that):
+
+```ts
+const [selectedCustomFields, setSelectedCustomFields] = useState<number[]>([]);
+// when the detail query resolves (same place other fields are seeded):
+//   setSelectedCustomFields(data.selected_custom_fields ?? []);
+```
+
+Respect Rules of Hooks: declare this `useState` with the other hooks, before any early `return`.
+
+- [ ] **Step 3: Render the picker in the editable header/meta area**
+
+Place near the other document-level settings (currency/language). `companySettings` is already loaded on the page via `companySettingsOptions()`. Use the page's existing "is this document editable / not locked by another user" boolean for `disabled` (e.g. `!canEdit` or the locked flag the page already computes):
+
+```tsx
+<CustomFieldsPrintPicker
+  fields={companySettings?.custom_fields ?? []}
+  selected={selectedCustomFields}
+  disabled={!canEdit}
+  onChange={setSelectedCustomFields}
+/>
+```
+
+> Use whatever the page already calls its edit-gate (e.g. `canEdit`, `editable`, `isLockedByOther`). Do NOT invent a new permission — reuse the page's existing flag so the picker locks exactly when the rest of the form does.
+
+- [ ] **Step 4: Include the selection in the save payload**
+
+Find where the page builds its update/create payload (the object passed to the save mutation) and add:
+
+```ts
+selected_custom_fields: selectedCustomFields,
+```
+
+- [ ] **Step 5: Repeat Steps 1-4 for `IssuedOrderDetail.tsx` and `InvoiceDetail.tsx`**
+
+Same edits; the company-settings query, edit-gate flag, and save payload all already exist on each page.
+
+- [ ] **Step 6: Typecheck + lint**
+
+Run: `npm run typecheck && npm run lint`
+Expected: PASS, 0 lint errors (watch `react-hooks/rules-of-hooks` — the new `useState` must precede any early return).
+
+- [ ] **Step 7: Commit**
+
+```bash
+git add src/admin/pages/OfferDetail.tsx src/admin/pages/IssuedOrderDetail.tsx src/admin/pages/InvoiceDetail.tsx
+git commit -m "feat(documents): per-document custom-field print picker on offer/issued-order/invoice detail"
+```
+
+---
+
+## Task 8: Full verification
+
+- [ ] **Step 1: Run the whole server suite**
+
+Run: `npm test`
+Expected: PASS (no regressions; new selected-custom-fields cases green).
+
+- [ ] **Step 2: Typecheck + lint + build**
+
+```bash
+npm run typecheck
+npm run lint
+npm run build
+```
+
+Expected: all PASS; client builds.
+
+- [ ] **Step 3: Manual smoke (user-driven, dev server is theirs)**
+
+Ask the user to: open an offer detail with company custom fields defined → tick one field → save → open its PDF and confirm only that field prints in the company block; confirm an untouched/older document prints no custom fields. Repeat for an issued order and an invoice.
+
+- [ ] **Step 4: Final state check**
+
+```bash
+git status
+git log --oneline -8
+```
+
+Expected: clean tree, the feature commits present.
+
+---
+
+## Self-review notes (addressed)
+
+- **Spec coverage:** storage column (T1), encode/decode (T2), schemas (T3), service persist+decode (T4), PDF filter (T5), frontend types+picker (T6), detail-page wiring (T7), tests throughout + full verify (T8). Order confirmations deliberately untouched. ✅
+- **Default = none:** `buildAddressLines` filters only when passed an array; the company call always passes the parsed selection (default `[]`), so nothing prints until ticked. Customer/supplier calls omit the param ⇒ unchanged. ✅
+- **Positional identity:** indices key off the full `fields` array on both render and picker sides (T5 note, T6 Step 2 note). ✅
+- **Type consistency:** `encodeSelectedCustomFields` / `parseSelectedCustomFields` used with identical signatures across services and PDF routes; detail interfaces expose `number[]`. ✅
+- **Open confirmations flagged inline** (prisma import path in tests; whether each PDF route narrows its document `select`) — each has a grep-first instruction rather than an assumption.

docs/superpowers/specs/2026-06-13-item-sleva-discount-design.md

@@ -0,0 +1,98 @@
+# Per-item Sleva (% discount) — Offers + Invoices
+
+**Date:** 2026-06-13
+**Status:** Approved → implementing
+**Scope:** Add a per-line-item percentage discount ("Sleva") to **offers**
+(nabídky) and **issued invoices** (Faktury), on both the detail-page item
+editor and the PDF. Received invoices, issued orders and orders are NOT
+touched.
+
+## Decisions (from brainstorming)
+
+- **Type:** percentage per item (0–100), not an absolute amount.
+- **Totals/VAT:** the discount reduces the line **net**; on invoices VAT is
+  computed on the **discounted** net. `net = qty × unit_price × (1 − discount/100)`.
+- **PDF column is conditional:** render the Sleva column only when at least one
+  (included) item has `discount > 0`; otherwise the table is identical to today.
+- **Detail-page column is always visible** (it's the input).
+
+## Data model
+
+Add to `quotation_items` and `invoice_items`:
+
+```
+discount Decimal? @default(0.00) @db.Decimal(5, 2)   // percent, 0–100
+```
+
+Nullable with default `0`, matching the existing money columns. "No sleva" =
+`0` or null. One tracked migration; apply to dev `app` and `app_test`, then
+`prisma generate`.
+
+## Line math (single rule)
+
+`lineNet = qty × unit_price × (1 − clamp(discount,0,100)/100)`
+
+Add a shared backend helper so every site is identical:
+
+```ts
+// src/utils/money.ts (new)
+export const lineNet = (qty: number, unitPrice: number, discountPct: number) =>
+  qty * unitPrice * (1 - (discountPct || 0) / 100);
+```
+
+## Backend
+
+- **Schemas (Zod):** add `discount` to the offer-item and invoice-item schemas
+  via `numberInRange(0, 100)` (shared coercer in `common.ts`), optional, default
+  `0`.
+- **offers.service** (`enrichQuotation`): line total uses `lineNet`; document
+  net ("Celkem bez DPH") sums discounted included lines. Persist `discount` on
+  item create/update.
+- **invoices.service**: every `computeMoney` `getBase` callback
+  (`computeInvoiceTotals`, monthly-stats `invoiceMonthlyAmount`, per-rate
+  `vatMap`) returns `lineNet(...)` so subtotal **and** VAT use the discounted
+  net. Persist `discount` on item create/update.
+- **DocumentItemsEditor's `documentItemsTotal`** (frontend) mirrors the same
+  discounted net.
+
+## Frontend (Section 1 — detail-page editor)
+
+- **Offers** → shared `src/admin/components/document/DocumentItemsEditor.tsx`:
+  `DocumentItem` gains `discount`; add a **"Sleva %"** numeric column (0–100);
+  per-line total and the footer net total apply it. Mobile card layout gets the
+  field. `emptyDocumentItem` defaults `discount: 0`. Hydration + save payloads
+  carry `discount`.
+- **Invoices** → `src/admin/pages/InvoiceDetail.tsx` own editor
+  (`SortableInvoiceRow` + create/edit rows): `InvoiceItem` gains `discount`;
+  same column; net/VAT/gross totals apply it. Mobile layout too.
+
+## PDF (Section 2 — conditional column)
+
+`src/routes/admin/offers-pdf.ts` and `src/routes/admin/invoices-pdf.ts`:
+
+- `const hasDiscount = items.some(i => includedInTotal(i) && Number(i.discount) > 0)`.
+- When `hasDiscount`: add a column — header **"Sleva"** (cs) / **"Discount"**
+  (en, from the document's `language`), cell renders `"<n> %"` (escaped); adjust
+  colspans of any full-width rows accordingly.
+- Line net / document total / VAT always use the discounted net regardless of
+  `hasDiscount`.
+- `escapeHtml` every interpolation (string-built PDF templates).
+
+## Tests
+
+- `offer-invoice-totals` / invoice totals: net, VAT and gross with discounts
+  (incl. a 100% line = 0, and VAT-on-discounted-net).
+- Schema: `discount` rejects <0 and >100, coerces form strings, defaults 0.
+- PDF: column present when an item has a discount; absent when none; values
+  escaped.
+
+## Non-goals (YAGNI)
+
+- No separate "total discount" summary line, no document-level discount.
+- No changes to received invoices, issued orders, or orders.
+
+## Migration etiquette
+
+DB change → user stops the dev server first; create the migration via the
+non-interactive `prisma migrate diff` recipe, `migrate deploy` + `generate` on
+dev and `app_test`, commit schema + migration folder together.

docs/superpowers/specs/2026-06-16-per-document-custom-field-selection-design.md

@@ -0,0 +1,211 @@
+# Per-document custom-field print selection
+
+**Date:** 2026-06-16
+**Status:** Approved design — ready for implementation plan
+**Scope:** offers (quotations), issued orders, invoices
+
+---
+
+## Problem
+
+Company custom fields are defined in company settings (`company_settings.custom_fields`,
+a JSON blob of `{name, value, showLabel}[]` plus a `field_order`). They render in the
+**sender/company block** of document PDFs via `buildAddressLines(settings, …)`.
+
+Today **every** custom field with a value prints on **every** document PDF (offer, issued
+order, invoice). The only existing per-field control is the company-settings checkbox
+**"Zobrazit název v PDF"** (`showLabel`), which decides whether a printed field shows as
+`Name: Value` or just `Value` — it does **not** control whether the field appears at all.
+
+The user wants per-document control: on each offer / issued order / invoice **detail page**,
+tick which company custom fields actually print on that specific document's PDF.
+
+## Goals
+
+- Each offer, issued order, and invoice independently selects which company custom fields
+  print in its PDF sender block.
+- Selection lives on the document and is editable on its detail page.
+- Default is **none selected** — existing documents and new drafts print no custom fields
+  until fields are deliberately ticked.
+- The company-settings `showLabel` ("Zobrazit název v PDF") checkbox is **unchanged**.
+
+## Non-goals
+
+- Order confirmations ("orders" / `orders-pdf.ts`) are **out of scope** — they keep current
+  behavior (print all custom fields).
+- No change to how custom fields are _defined_ in company settings.
+- No stable per-field IDs — selection is **positional** (see Decisions).
+
+## Decisions (locked)
+
+1. **Default = none selected.** Existing rows get `NULL`; new documents start empty. A
+   document prints custom fields only for the indices it explicitly stores.
+2. **Positional identity.** Selection stores field **positions** (`0,1,2…`) matching the
+   existing `custom_<i>` keys in the PDF code. No settings-structure change, no backfill.
+   Accepted caveat: reordering/deleting a custom field in company settings can shift what a
+   saved document's stored indices point at. Low risk — company fields rarely change, and
+   finalized PDFs are archived on NAS (served as-is, not re-rendered). The user accepted this
+   over the more robust stable-ID approach.
+3. **Scope = 3 document types** (offers, issued orders, invoices). Order confirmations excluded.
+4. **`showLabel` retained** in company settings, untouched.
+
+---
+
+## Design
+
+### 1. Data storage
+
+Add one nullable column to each of `quotations`, `issued_orders`, `invoices`:
+
+| Column                   | Type      | Meaning                                                       |
+| ------------------------ | --------- | ------------------------------------------------------------- |
+| `selected_custom_fields` | `VARCHAR` | JSON array of selected indices, e.g. `"[0,2]"`; `NULL` = none |
+
+Stored as JSON-in-text, consistent with the existing `company_settings.custom_fields` /
+`customers.custom_fields` pattern. `NULL`/empty ⇒ no custom fields print.
+
+One tracked migration per the project's non-interactive `prisma migrate diff` recipe
+(CLAUDE.md). **Apply to `app_test` as well** (`DATABASE_URL=<app_test> npx prisma migrate
+deploy`) or the suite breaks. Commit `schema.prisma` + migration folder together.
+
+### 2. Backend — schemas
+
+Add to each document's **Create and Update** Zod schema:
+
+```ts
+selected_custom_fields: z.array(z.number().int().nonnegative()).max(200).optional(),
+```
+
+Files:
+
+- `src/schemas/offers.schema.ts` — `CreateQuotationSchema` (Update derives via `.partial().omit()`).
+- `src/schemas/issued-orders.schema.ts` — `CreateIssuedOrderSchema` (Update derives via `.partial().omit()`).
+- `src/schemas/invoices.schema.ts` — both `CreateInvoiceSchema` and `UpdateInvoiceSchema`
+  (invoices define the two schemas separately).
+
+### 3. Backend — services
+
+In each create/update service, persist the field inside the **existing transaction**:
+
+- On write: `selected_custom_fields: Array.isArray(body.selected_custom_fields) &&
+body.selected_custom_fields.length > 0 ? JSON.stringify(body.selected_custom_fields) : null`
+- No other logic changes; sits alongside the existing header column assignments.
+
+Files: `src/services/offers.service.ts`, `src/services/issued-orders.service.ts`,
+`src/services/invoices.service.ts`.
+
+### 4. Backend — detail responses
+
+The detail endpoints spread the document row. Decode the stored string back into a
+`number[]` so the frontend receives a clean array (default `[]` when `NULL`/malformed —
+malformed JSON degrades gracefully with a logged warning, per the error convention). Add
+`selected_custom_fields: number[]` to the corresponding detail interfaces in
+`src/admin/lib/queries/{offers,issued-orders,invoices}.ts`.
+
+### 5. PDF rendering
+
+In each of `offers-pdf.ts`, `issued-orders-pdf.ts`, `invoices-pdf.ts`, extend the
+company-block `buildAddressLines()` with an optional parameter:
+
+```ts
+buildAddressLines(entity, isSupplier, t, selectedCustomFields?: number[] | null)
+```
+
+When building `fieldMap`, only emit a `custom_<i>` entry when `selectedCustomFields`
+includes `i`. Behavior:
+
+- `null` / `undefined` / empty array ⇒ **no** custom lines (the new default).
+- Standard address lines (name, street, city/postal, country, IČO/`company_id`,
+  DIČ/`vat_id`) are **unaffected** — always built as today.
+- For the custom fields that _are_ selected, the existing `showLabel` (`Name: Value` vs
+  `Value`) and `field_order` ordering logic is preserved unchanged.
+
+Only the **company/sender** block is filtered (that's where company custom fields render).
+The customer block (offers/invoices) and supplier block (issued orders) keep their own
+custom-field behavior unchanged — those come from `customers`/`sklad_suppliers`, not company
+settings, and are not in scope.
+
+The PDF route reads the document's `selected_custom_fields` column, parses it to `number[]`,
+and passes it into `buildAddressLines(settings, …, selected)`.
+
+> Archived-PDF note: finalized/numbered documents serve their archived NAS copy and won't
+> change retroactively. Drafts (and any forced re-render) reflect the current selection.
+
+### 6. Frontend — shared picker component
+
+New shared component under `src/admin/components/document/` (e.g.
+`CustomFieldsPrintPicker.tsx`), reused by all three detail pages (extend the shared module,
+don't fork three copies — per CLAUDE.md document-module conventions).
+
+Props (shape): the parsed company custom fields (`{name, value}[]` from
+`companySettings.custom_fields`), the current selected indices, an `onChange`, and a
+`disabled` flag.
+
+Behavior:
+
+- Renders a checkbox per company custom field; label shows the field's name (and/or value)
+  so the user knows what each is.
+- Bound to local state on the detail page, seeded from the document's
+  `selected_custom_fields`.
+- Hidden/empty when the company has no custom fields defined.
+- Respects edit-lock and editable-status rules: read-only (`disabled`) when the document
+  isn't editable or is locked by another user, matching how the rest of the header fields
+  behave on that page.
+- Included in the page's save payload as `selected_custom_fields: number[]`.
+
+Pages: `src/admin/pages/OfferDetail.tsx`, `IssuedOrderDetail.tsx`, `InvoiceDetail.tsx` —
+each already loads `companySettingsOptions()`, so the field definitions are available with
+no new query.
+
+Placement: in the editable header/meta area of each detail page, near the other
+document-level settings (currency/language/etc.).
+
+---
+
+## Data flow
+
+```
+Company settings: custom_fields = [{name:"Tel.",…}, {name:"Web",…}, {name:"Datová schránka",…}]
+                                      idx 0           idx 1          idx 2
+
+Offer detail page → user ticks "Tel." and "Datová schránka"
+  → save payload selected_custom_fields: [0, 2]
+  → service stores quotations.selected_custom_fields = "[0,2]"
+
+Offer PDF render
+  → read column "[0,2]" → [0,2]
+  → buildAddressLines(settings, …, [0,2])
+  → fieldMap emits custom_0 ("Tel.: …") and custom_2 ("Datová schránka: …"), skips custom_1
+  → sender block prints Tel. and Datová schránka only
+```
+
+## Testing
+
+Server-side Vitest against `app_test` (no Prisma mocking; mock Puppeteer/NAS only):
+
+- Create/update each document with `selected_custom_fields` → column persists the JSON
+  string; empty/omitted → `NULL`.
+- Detail response decodes to `number[]` (and `[]` for `NULL`).
+- Schema: non-integer / negative entries rejected; omitted is valid.
+- PDF: with a stubbed `html-to-pdf`, assert the rendered company block includes only the
+  selected custom field lines and still includes standard address lines; empty selection ⇒
+  no custom lines; standard lines unaffected.
+- Regression: customer/supplier custom fields still render regardless of company selection.
+
+## Migration & rollout
+
+- One migration adding the three columns (all default `NULL`), applied to dev `app` and
+  `app_test`.
+- No data backfill (none-selected default is the intended post-ship state).
+- No production PDF changes for already-archived documents.
+
+## Affected files (reference)
+
+- `prisma/schema.prisma` (+ new migration folder)
+- `src/schemas/offers.schema.ts`, `issued-orders.schema.ts`, `invoices.schema.ts`
+- `src/services/offers.service.ts`, `issued-orders.service.ts`, `invoices.service.ts`
+- `src/routes/admin/offers-pdf.ts`, `issued-orders-pdf.ts`, `invoices-pdf.ts`
+- (detail route handlers, if decoding is done there rather than in the service)
+- `src/admin/lib/queries/offers.ts`, `issued-orders.ts`, `invoices.ts`
+- `src/admin/components/document/CustomFieldsPrintPicker.tsx` (new)
+- `src/admin/pages/OfferDetail.tsx`, `IssuedOrderDetail.tsx`, `InvoiceDetail.tsx`

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "app-ts",
-  "version": "2.4.34",
+  "version": "2.4.40",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "app-ts",
-      "version": "2.4.34",
+      "version": "2.4.40",
       "license": "ISC",
       "dependencies": {
         "@anthropic-ai/sdk": "^0.102.0",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "app-ts",
-  "version": "2.4.34",
+  "version": "2.4.40",
   "description": "",
   "main": "dist/server.js",
   "scripts": {

prisma/migrations/20260613195833_add_item_discount/migration.sql

@@ -0,0 +1,6 @@
+-- AlterTable
+ALTER TABLE `invoice_items` ADD COLUMN `discount` DECIMAL(5, 2) NULL DEFAULT 0.00;
+
+-- AlterTable
+ALTER TABLE `quotation_items` ADD COLUMN `discount` DECIMAL(5, 2) NULL DEFAULT 0.00;
+

prisma/migrations/20260616200526_add_selected_custom_fields/migration.sql

@@ -0,0 +1,9 @@
+-- AlterTable
+ALTER TABLE `invoices` ADD COLUMN `selected_custom_fields` VARCHAR(255) NULL;
+
+-- AlterTable
+ALTER TABLE `issued_orders` ADD COLUMN `selected_custom_fields` VARCHAR(255) NULL;
+
+-- AlterTable
+ALTER TABLE `quotations` ADD COLUMN `selected_custom_fields` VARCHAR(255) NULL;
+

prisma/schema.prisma

@@ -208,6 +208,7 @@ model invoice_items {
   quantity         Decimal? @default(1.000) @db.Decimal(12, 3)
   unit             String?  @db.VarChar(20)
   unit_price       Decimal? @default(0.00) @db.Decimal(12, 2)
+  discount         Decimal? @default(0.00) @db.Decimal(5, 2)
   vat_rate         Decimal? @default(21.00) @db.Decimal(5, 2)
   position         Int?     @default(0)
   invoices         invoices @relation(fields: [invoice_id], references: [id], onDelete: Cascade, onUpdate: NoAction, map: "invoice_items_ibfk_1")
@@ -238,6 +239,7 @@ model invoices {
   billing_text     String?            @db.VarChar(500)
   language         String?            @default("cs") @db.VarChar(5)
   internal_notes   String?            @db.Text
+  selected_custom_fields String?      @db.VarChar(255)
   created_at       DateTime?          @default(now()) @db.DateTime(0)
   modified_at      DateTime?          @db.DateTime(0)
   invoice_items    invoice_items[]
@@ -392,6 +394,7 @@ model issued_orders {
   language              String?                 @default("cs") @db.VarChar(5)
   order_text            String?                 @db.VarChar(500)
   internal_notes        String?                 @db.Text
+  selected_custom_fields String?                @db.VarChar(255)
   locked_by             Int?
   locked_at             DateTime?               @db.DateTime(0)
   created_at            DateTime?               @default(now()) @db.DateTime(0)
@@ -505,6 +508,7 @@ model quotation_items {
   quantity             Decimal?   @default(1.000) @db.Decimal(12, 3)
   unit                 String?    @db.VarChar(20)
   unit_price           Decimal?   @default(0.00) @db.Decimal(12, 2)
+  discount             Decimal?   @default(0.00) @db.Decimal(5, 2)
   is_included_in_total Boolean?   @default(true)
   modified_at          DateTime?  @db.DateTime(0)
   quotations           quotations @relation(fields: [quotation_id], references: [id], onDelete: Cascade, onUpdate: NoAction, map: "quotation_items_ibfk_1")
@@ -525,6 +529,7 @@ model quotations {
   status            String            @default("active") @db.VarChar(20)
   scope_title       String?           @db.VarChar(500)
   scope_description String?           @db.Text
+  selected_custom_fields String?      @db.VarChar(255)
   locked_by         Int?
   locked_at         DateTime?         @db.DateTime(0)
   modified_at       DateTime?         @db.DateTime(0)

src/__tests__/__snapshots__/attendance-print-html.test.ts.snap

@@ -0,0 +1,374 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`buildUserSectionHtml > produces a stable per-user section (full output pinned) 1`] = `
+"<div class="user-section">
+    <div class="user-header">
+      <h3>Jan Novák</h3>
+      <span class="total">Odpracováno: 8:00 h</span>
+    </div>
+    <table>
+      <thead><tr>
+        <th style="width:55px">Datum</th>
+        <th style="width:55px">Den</th>
+        <th style="width:60px">Typ</th>
+        <th class="text-center" style="width:55px">Příchod</th>
+        <th class="text-center" style="width:80px">Pauza</th>
+        <th class="text-center" style="width:55px">Odchod</th>
+        <th class="text-center" style="width:85px">Hodiny</th>
+        <th>Projekty</th>
+        <th>Poznámka</th>
+      </tr></thead>
+      <tbody><tr class="weekend">
+        <td>1. 3. 2098</td>
+        <td>Sobota</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>2. 3. 2098</td>
+        <td>Neděle</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>3. 3. 2098</td>
+        <td>Pondělí</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+      <td>4. 3. 2098</td>
+      <td>Úterý</td>
+      <td>Práce</td>
+      <td class="text-center">08:00</td>
+      <td class="text-center">12:00 - 12:30</td>
+      <td class="text-center">16:30</td>
+      <td class="text-center">8:00 (8,00)</td>
+      <td style="font-size:8px"><div>Alpha (8:00h)</div></td>
+      <td>Poznámka &lt;b&gt;</td>
+    </tr><tr class="vacation">
+      <td>5. 3. 2098</td>
+      <td>Středa</td>
+      <td>Dovolená</td>
+      <td class="text-center">—</td>
+      <td class="text-center">—</td>
+      <td class="text-center">—</td>
+      <td class="text-center">8,00</td>
+      <td style="font-size:8px">—</td>
+      <td></td>
+    </tr><tr class="">
+        <td>6. 3. 2098</td>
+        <td>Čtvrtek</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>7. 3. 2098</td>
+        <td>Pátek</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>8. 3. 2098</td>
+        <td>Sobota</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>9. 3. 2098</td>
+        <td>Neděle</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>10. 3. 2098</td>
+        <td>Pondělí</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>11. 3. 2098</td>
+        <td>Úterý</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>12. 3. 2098</td>
+        <td>Středa</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>13. 3. 2098</td>
+        <td>Čtvrtek</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>14. 3. 2098</td>
+        <td>Pátek</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>15. 3. 2098</td>
+        <td>Sobota</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>16. 3. 2098</td>
+        <td>Neděle</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>17. 3. 2098</td>
+        <td>Pondělí</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>18. 3. 2098</td>
+        <td>Úterý</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>19. 3. 2098</td>
+        <td>Středa</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>20. 3. 2098</td>
+        <td>Čtvrtek</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>21. 3. 2098</td>
+        <td>Pátek</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>22. 3. 2098</td>
+        <td>Sobota</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>23. 3. 2098</td>
+        <td>Neděle</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>24. 3. 2098</td>
+        <td>Pondělí</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>25. 3. 2098</td>
+        <td>Úterý</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>26. 3. 2098</td>
+        <td>Středa</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>27. 3. 2098</td>
+        <td>Čtvrtek</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>28. 3. 2098</td>
+        <td>Pátek</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>29. 3. 2098</td>
+        <td>Sobota</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="weekend">
+        <td>30. 3. 2098</td>
+        <td>Neděle</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr><tr class="">
+        <td>31. 3. 2098</td>
+        <td>Pondělí</td>
+        <td>—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td class="text-center">—</td>
+        <td></td>
+        <td></td>
+      </tr></tbody>
+    </table>
+    <div class="user-summary">
+    <div class="summary-row">
+      <span class="summary-label">Odpracováno:</span>
+      <span class="summary-value">8,00h</span>
+    </div>
+    <div class="summary-row">
+      <span class="summary-label">Odpracováno včetně svátků a přesčasů:</span>
+      <span class="summary-value">16,00h</span>
+    </div>
+    <div class="summary-row">
+      <span class="summary-label">Dovolená:</span>
+      <span class="summary-value">8,00h</span>
+    </div>
+    <div class="summary-row">
+      <span class="summary-label">Přesčas:</span>
+      <span class="summary-value">8,00h</span>
+    </div>
+    <div class="summary-row">
+      <span class="summary-label">Svátek:</span>
+      <span class="summary-value">0,00h</span>
+    </div>
+    <div class="summary-row">
+      <span class="summary-label">So/Ne:</span>
+      <span class="summary-value">0,00h</span>
+    </div>
+    <div class="summary-row">
+      <span class="summary-label">Práce v noci:</span>
+      <span class="summary-value">0,00h</span>
+    </div>
+    <div class="summary-row summary-fund">
+      <span class="summary-label">Fond měsíce:</span>
+      <span class="summary-value">168,00h (21 dnů)</span>
+    </div>
+    <div class="legend">
+      <span class="legend-item"><span class="legend-swatch weekend"></span>Víkend (So/Ne)</span>
+      <span class="legend-item"><span class="legend-swatch holiday"></span>Svátek</span>
+      <span class="legend-item"><span class="legend-swatch weekend-holiday"></span>Víkend + svátek</span>
+      <span class="legend-item"><span class="legend-swatch vacation"></span>Dovolená</span>
+    </div>
+  </div>
+  </div>"
+`;

src/__tests__/app-version-store.test.ts

@@ -0,0 +1,46 @@
+import { describe, it, expect, beforeEach } from "vitest";
+import {
+  reportServerVersion,
+  subscribeNewVersion,
+  getNewVersion,
+  BUILD_VERSION,
+  __resetVersionStateForTest,
+} from "../admin/utils/appVersion";
+
+/**
+ * Client store backing the "new version available" banner. The server stamps
+ * X-App-Version on every response; apiFetch feeds it here. A version that
+ * differs from the one baked into THIS bundle (BUILD_VERSION) means a deploy
+ * happened → latch it and notify subscribers (the banner).
+ */
+
+describe("appVersion store", () => {
+  beforeEach(() => __resetVersionStateForTest());
+
+  it("ignores the same version, empty, or null", () => {
+    reportServerVersion(BUILD_VERSION);
+    reportServerVersion("");
+    reportServerVersion(null);
+    reportServerVersion(undefined);
+    expect(getNewVersion()).toBeNull();
+  });
+
+  it("latches + notifies once when the server reports a different version", () => {
+    let notified = 0;
+    const unsub = subscribeNewVersion(() => {
+      notified++;
+    });
+
+    reportServerVersion(`${BUILD_VERSION}-next`);
+    expect(getNewVersion()).toBe(`${BUILD_VERSION}-next`);
+    expect(notified).toBe(1);
+
+    // Idempotent: once a new version is known, further reports don't re-notify
+    // or overwrite (the banner is already showing).
+    reportServerVersion("99.0.0");
+    expect(getNewVersion()).toBe(`${BUILD_VERSION}-next`);
+    expect(notified).toBe(1);
+
+    unsub();
+  });
+});

src/__tests__/attendance-print-html.test.ts

@@ -0,0 +1,155 @@
+import { describe, it, expect } from "vitest";
+import {
+  buildProjectLogsHtml,
+  buildUserSectionHtml,
+  buildPrintHtml,
+} from "../admin/hooks/useAttendanceAdmin";
+
+/**
+ * Characterization test for the attendance print-HTML builders.
+ *
+ * These builders had `any`-typed params; this pins their CURRENT output so the
+ * follow-up retyping (precise AttendanceRecord/UserTotal/PrintData types) is
+ * provably behavior-preserving. The only runtime touch in that retype is
+ * `parseInt(log.hours)` → `parseInt(String(log.hours))` to satisfy the typed
+ * `string | number | null` shape — the cases below exercise both string and
+ * numeric hours/minutes precisely so that equivalence is locked in.
+ *
+ * Fixtures are cast through `Parameters<typeof fn>` so the test compiles both
+ * before and after the param types tighten.
+ */
+
+type RecordArg = Parameters<typeof buildProjectLogsHtml>[0];
+type UserDataArg = Parameters<typeof buildUserSectionHtml>[1];
+type PrintDataArg = Parameters<typeof buildUserSectionHtml>[2];
+const asRecord = (o: unknown) => o as unknown as RecordArg;
+const asUserData = (o: unknown) => o as unknown as UserDataArg;
+const asPrintData = (o: unknown) => o as unknown as PrintDataArg;
+
+describe("buildProjectLogsHtml", () => {
+  it("formats hours/minutes given as strings", () => {
+    expect(
+      buildProjectLogsHtml(
+        asRecord({
+          project_logs: [
+            { project_id: 1, project_name: "Alpha", hours: "2", minutes: "30" },
+          ],
+        }),
+      ),
+    ).toBe("<div>Alpha (2:30h)</div>");
+  });
+
+  it("formats hours/minutes given as numbers (parseInt-of-number path)", () => {
+    expect(
+      buildProjectLogsHtml(
+        asRecord({
+          project_logs: [
+            { project_id: 2, project_name: "Beta", hours: 1, minutes: 5 },
+          ],
+        }),
+      ),
+    ).toBe("<div>Beta (1:05h)</div>");
+  });
+
+  it("derives duration from started_at/ended_at when hours are absent", () => {
+    expect(
+      buildProjectLogsHtml(
+        asRecord({
+          project_logs: [
+            {
+              project_id: 3,
+              project_name: "Gamma",
+              started_at: "2098-01-05T08:00:00",
+              ended_at: "2098-01-05T10:30:00",
+            },
+          ],
+        }),
+      ),
+    ).toBe("<div>Gamma (2:30h)</div>");
+  });
+
+  it("falls back to '#id' and 0:00 when name and times are missing", () => {
+    expect(
+      buildProjectLogsHtml(asRecord({ project_logs: [{ project_id: 7 }] })),
+    ).toBe("<div>#7 (0:00h)</div>");
+  });
+
+  it("renders the bare project name when there are no logs", () => {
+    expect(
+      buildProjectLogsHtml(
+        asRecord({ project_name: "Solo & <Co>", project_logs: [] }),
+      ),
+    ).toBe("Solo &amp; &lt;Co&gt;");
+  });
+});
+
+// Deterministic fixture: a fixed far-future month, one work day (with a numeric
+// project log so the snapshot also guards the parseInt path in context) and one
+// vacation day.
+const workRecord = {
+  id: 1,
+  user_id: 5,
+  shift_date: "2098-03-04",
+  leave_type: "work",
+  arrival_time: "2098-03-04T08:00:00",
+  departure_time: "2098-03-04T16:30:00",
+  break_start: "2098-03-04T12:00:00",
+  break_end: "2098-03-04T12:30:00",
+  notes: "Poznámka <b>",
+  project_logs: [
+    { project_id: 1, project_name: "Alpha", hours: 8, minutes: 0 },
+  ],
+};
+const leaveRecord = {
+  id: 2,
+  user_id: 5,
+  shift_date: "2098-03-05",
+  leave_type: "vacation",
+  leave_hours: 8,
+};
+const userData = {
+  name: "Jan Novák",
+  minutes: 480,
+  records: [workRecord, leaveRecord],
+};
+const printData = {
+  month: "2098-03",
+  month_name: "Březen 2098",
+  selected_user_name: null,
+  user_totals: { "5": userData },
+};
+
+describe("buildUserSectionHtml", () => {
+  it("produces a stable per-user section (full output pinned)", () => {
+    const html = buildUserSectionHtml(
+      "5",
+      asUserData(userData),
+      asPrintData(printData),
+    );
+    expect(html).toMatchSnapshot();
+  });
+});
+
+describe("buildPrintHtml", () => {
+  // NB: the document footer embeds `new Date()`, so assert stable fragments
+  // rather than snapshotting the whole (non-deterministic) output.
+  it("wraps the user sections in a stable document shell", () => {
+    const section = buildUserSectionHtml(
+      "5",
+      asUserData(userData),
+      asPrintData(printData),
+    );
+    const html = buildPrintHtml(
+      asPrintData(printData),
+      section,
+      "",
+      "",
+      "Firma s.r.o.",
+    );
+    expect(html).toContain("<title>Docházka - Březen 2098</title>");
+    expect(html).toContain("EVIDENCE DOCHÁZKY");
+    expect(html).toContain('<div class="period">Březen 2098</div>');
+    expect(html).toContain("Firma s.r.o.");
+    expect(html).toContain(section);
+  });
+});

src/__tests__/drafts-deferred-numbering.test.ts

@@ -87,7 +87,9 @@ describe("issued-order drafts — deferred numbering", () => {
 
   it("finalizing a draft (draft -> sent) assigns the next sequence number", async () => {
     const expected = (await previewIssuedOrderNumber()).number;
-    const draft = await createIssuedOrder({});
+    const draft = await createIssuedOrder({
+      items: [{ description: "Položka", quantity: 1, unit_price: 1 }],
+    });
     if ("error" in draft)
       throw new Error(`createIssuedOrder failed: ${draft.error}`);
     issuedOrderIds.push(draft.id);
@@ -104,7 +106,9 @@ describe("issued-order drafts — deferred numbering", () => {
   });
 
   it("finalizing is idempotent — re-finalizing does not re-number", async () => {
-    const draft = await createIssuedOrder({});
+    const draft = await createIssuedOrder({
+      items: [{ description: "Položka", quantity: 1, unit_price: 1 }],
+    });
     if ("error" in draft)
       throw new Error(`createIssuedOrder failed: ${draft.error}`);
     issuedOrderIds.push(draft.id);

src/__tests__/issued-orders.test.ts

@@ -169,7 +169,10 @@ describe("createIssuedOrder", () => {
 
   it("numbers immediately when created already-finalized (status sent)", async () => {
     const before = (await previewIssuedOrderNumber()).number;
-    const order = await mkIssued({ status: "sent" });
+    const order = await mkIssued({
+      status: "sent",
+      items: [{ description: "Položka", quantity: 1, unit_price: 1 }],
+    });
     expect(order.po_number).toBe(before);
     expect(order.status).toBe("sent");
   });
@@ -199,7 +202,9 @@ describe("createIssuedOrder", () => {
 
 describe("updateIssuedOrder status transitions", () => {
   it("allows draft -> sent and rejects draft -> completed", async () => {
-    const order = await mkIssued({});
+    const order = await mkIssued({
+      items: [{ description: "Položka", quantity: 1, unit_price: 1 }],
+    });
     const ok = await updateIssuedOrder(order.id, { status: "sent" });
     expect("error" in ok).toBe(false);
     const bad = await updateIssuedOrder(order.id, { status: "completed" });
@@ -226,7 +231,9 @@ describe("updateIssuedOrder status transitions", () => {
   });
 
   it("status-only transition payloads still work when not editable", async () => {
-    const order = await mkIssued({});
+    const order = await mkIssued({
+      items: [{ description: "Položka", quantity: 1, unit_price: 1 }],
+    });
     await updateIssuedOrder(order.id, { status: "sent" });
     await updateIssuedOrder(order.id, { status: "confirmed" });
     const res = await updateIssuedOrder(order.id, { status: "completed" });
@@ -242,6 +249,44 @@ describe("updateIssuedOrder status transitions", () => {
     const res = await updateIssuedOrder(order.id, { supplier_id: 99999999 });
     expect("error" in res && res.error).toBe("supplier_not_found");
   });
+
+  it("finalizes a sections-only order (no items) successfully", async () => {
+    const order = await mkIssued({});
+    const res = await updateIssuedOrder(order.id, {
+      status: "sent",
+      items: [],
+      sections: [
+        { title: "Scope", title_cz: "Rozsah prací", content: "<p>Detail</p>" },
+      ],
+    });
+    expect("error" in res).toBe(false);
+    const row = await prisma.issued_orders.findUnique({
+      where: { id: order.id },
+    });
+    expect(row!.status).toBe("sent");
+    expect(row!.po_number).toBeTruthy();
+  });
+
+  it("rejects finalizing a completely blank order (no items, no sections)", async () => {
+    const order = await mkIssued({});
+    const res = await updateIssuedOrder(order.id, {
+      status: "sent",
+      items: [],
+      sections: [],
+    });
+    expect("error" in res && res.error).toBe("empty_document");
+    // Stays a draft — the finalize was rejected before any write.
+    const row = await prisma.issued_orders.findUnique({
+      where: { id: order.id },
+    });
+    expect(row!.status).toBe("draft");
+    expect(row!.po_number).toBeNull();
+  });
+
+  it("rejects creating a non-draft order with no content", async () => {
+    const res = await createIssuedOrder({ status: "sent" });
+    expect("error" in res && res.error).toBe("empty_document");
+  });
 });
 
 describe("getIssuedOrder", () => {
@@ -525,7 +570,9 @@ describe("POST /api/admin/issued-orders legacy dropped fields", () => {
 
 describe("PUT /api/admin/issued-orders/:id editable-state guard (HTTP)", () => {
   it("400s a field edit on a confirmed order with the explicit Czech message", async () => {
-    const order = await mkIssued({});
+    const order = await mkIssued({
+      items: [{ description: "Položka", quantity: 1, unit_price: 1 }],
+    });
     await updateIssuedOrder(order.id, { status: "sent" });
     await updateIssuedOrder(order.id, { status: "confirmed" });
 
@@ -543,7 +590,9 @@ describe("PUT /api/admin/issued-orders/:id editable-state guard (HTTP)", () => {
     // The IssuedOrderDetail transition flushes unsaved edits by sending the
     // full payload + status in ONE PUT while the order is still editable
     // (sent). The server must apply the items AND the transition together.
-    const order = await mkIssued({});
+    const order = await mkIssued({
+      items: [{ description: "Položka", quantity: 1, unit_price: 1 }],
+    });
     await updateIssuedOrder(order.id, { status: "sent" });
 
     const res = await app!.inject({
@@ -574,7 +623,9 @@ describe("PUT /api/admin/issued-orders/:id editable-state guard (HTTP)", () => {
   });
 
   it("a status-only transition payload keeps working (confirmed -> completed)", async () => {
-    const order = await mkIssued({});
+    const order = await mkIssued({
+      items: [{ description: "Položka", quantity: 1, unit_price: 1 }],
+    });
     await updateIssuedOrder(order.id, { status: "sent" });
     await updateIssuedOrder(order.id, { status: "confirmed" });
 
@@ -733,6 +784,23 @@ describe("renderIssuedOrderHtml", () => {
     expect(html).toContain("Odběratel");
   });
 
+  it("omits the items table and total when there are no items (sections-only order)", () => {
+    const html = renderIssuedOrderHtml(
+      order,
+      [],
+      supplier,
+      { company_name: "Naše firma" },
+      "cs",
+      issuer,
+      [{ title: "Scope", title_cz: "Rozsah prací", content: "<p>Detail</p>" }],
+    );
+    // The section renders…
+    expect(html).toContain("Rozsah prací");
+    // …but the items table, the billing heading and the total row do not.
+    expect(html).not.toContain('class="items"');
+    expect(html).not.toContain("Celkem bez DPH");
+  });
+
   it("renders the structured supplier address plus IČO and DIČ", () => {
     const html = renderIssuedOrderHtml(
       order,

src/__tests__/item-discount-pdf.test.ts

@@ -0,0 +1,130 @@
+import { describe, it, expect, beforeAll, afterAll } from "vitest";
+import Fastify from "fastify";
+import jwt from "jsonwebtoken";
+import prisma from "../config/database";
+import { config } from "../config/env";
+import offersPdfRoutes from "../routes/admin/offers-pdf";
+import invoicesPdfRoutes from "../routes/admin/invoices-pdf";
+import { createInvoice } from "../services/invoices.service";
+
+/**
+ * The per-item Sleva column is CONDITIONAL on the PDF: render it only when at
+ * least one item carries a discount > 0; otherwise the table looks exactly as
+ * before. The discounted net always flows into the line/grand totals.
+ */
+
+let app: ReturnType<typeof Fastify> | null = null;
+let adminToken = "";
+const quotationIds: number[] = [];
+const invoiceIds: number[] = [];
+
+beforeAll(async () => {
+  app = Fastify({ logger: false });
+  await app.register(offersPdfRoutes, { prefix: "/api/admin/offers-pdf" });
+  await app.register(invoicesPdfRoutes, { prefix: "/api/admin/invoices-pdf" });
+  const admin = await prisma.users.findFirst({
+    where: { roles: { name: "admin" } },
+  });
+  if (!admin) throw new Error("Test setup: admin user not found");
+  adminToken = jwt.sign(
+    { sub: admin.id, username: admin.username, role: "admin" },
+    config.jwt.secret,
+    { expiresIn: "15m" },
+  );
+});
+
+afterAll(async () => {
+  for (const id of quotationIds)
+    await prisma.quotations.deleteMany({ where: { id } });
+  for (const id of invoiceIds)
+    await prisma.invoices.deleteMany({ where: { id } });
+  if (app) await app.close();
+});
+
+const offerHtml = async (discount: number): Promise<string> => {
+  const q = await prisma.quotations.create({
+    data: {
+      quotation_number: `Q-SLEVA-${discount}-${Date.now()}`,
+      status: "active",
+      currency: "CZK",
+      language: "cs",
+      quotation_items: {
+        create: [
+          {
+            description: "Položka",
+            quantity: 2,
+            unit: "ks",
+            unit_price: 100,
+            discount,
+            is_included_in_total: true,
+            position: 0,
+          },
+        ],
+      },
+    },
+  });
+  quotationIds.push(q.id);
+  const res = await app!.inject({
+    method: "GET",
+    url: `/api/admin/offers-pdf/${q.id}`,
+    headers: { Authorization: `Bearer ${adminToken}` },
+  });
+  expect(res.statusCode).toBe(200);
+  return res.body;
+};
+
+describe("offer PDF Sleva column", () => {
+  it("renders a Sleva column + discounted total when an item has a discount", async () => {
+    const html = await offerHtml(10);
+    expect(html).toContain("Sleva");
+    // 2 × 100 with 10% off => 180,00 (no thousands separator at this size).
+    expect(html).toContain("180,00");
+    expect(html).not.toContain("200,00");
+  });
+
+  it("omits the Sleva column when no item has a discount", async () => {
+    const html = await offerHtml(0);
+    expect(html).not.toContain("Sleva");
+    expect(html).toContain("200,00");
+  });
+});
+
+const invoiceHtml = async (discount: number): Promise<string> => {
+  const inv = await createInvoice({
+    status: "draft",
+    currency: "CZK",
+    apply_vat: true,
+    vat_rate: 21,
+    language: "cs",
+    items: [
+      {
+        description: "Položka",
+        quantity: 2,
+        unit_price: 1000,
+        discount,
+        vat_rate: 21,
+      },
+    ],
+  });
+  invoiceIds.push(inv.id);
+  const res = await app!.inject({
+    method: "GET",
+    url: `/api/admin/invoices-pdf/${inv.id}`,
+    headers: { Authorization: `Bearer ${adminToken}` },
+  });
+  expect(res.statusCode).toBe(200);
+  return res.body;
+};
+
+describe("invoice PDF Sleva column", () => {
+  it("renders a Sleva column when an item has a discount", async () => {
+    const html = await invoiceHtml(10);
+    expect(html).toContain("Sleva");
+    expect(html).toContain("10");
+  });
+
+  it("omits the Sleva column when no item has a discount", async () => {
+    const html = await invoiceHtml(0);
+    expect(html).not.toContain("Sleva");
+  });
+});

src/__tests__/item-discount-schema.test.ts

@@ -0,0 +1,55 @@
+import { describe, it, expect } from "vitest";
+import { CreateQuotationSchema } from "../schemas/offers.schema";
+import { CreateInvoiceSchema } from "../schemas/invoices.schema";
+
+/**
+ * The per-item Sleva is a percentage: the offer- and invoice-item schemas must
+ * accept 0–100, default to 0 when absent, and reject out-of-range values.
+ */
+
+describe("offer item discount schema", () => {
+  it("accepts a 0–100 discount", () => {
+    const r = CreateQuotationSchema.safeParse({
+      items: [{ description: "X", quantity: 1, unit_price: 100, discount: 15 }],
+    });
+    expect(r.success).toBe(true);
+    expect(r.success && r.data.items?.[0].discount).toBe(15);
+  });
+
+  it("defaults discount to 0 when absent", () => {
+    const r = CreateQuotationSchema.safeParse({
+      items: [{ description: "X", quantity: 1, unit_price: 100 }],
+    });
+    expect(r.success && r.data.items?.[0].discount).toBe(0);
+  });
+
+  it("rejects a discount above 100", () => {
+    const r = CreateQuotationSchema.safeParse({
+      items: [
+        { description: "X", quantity: 1, unit_price: 100, discount: 150 },
+      ],
+    });
+    expect(r.success).toBe(false);
+  });
+});
+
+describe("invoice item discount schema", () => {
+  it("accepts a 0–100 discount and defaults to 0", () => {
+    const ok = CreateInvoiceSchema.safeParse({
+      items: [{ description: "X", quantity: 1, unit_price: 100, discount: 10 }],
+    });
+    expect(ok.success && ok.data.items?.[0].discount).toBe(10);
+
+    const def = CreateInvoiceSchema.safeParse({
+      items: [{ description: "X", quantity: 1, unit_price: 100 }],
+    });
+    expect(def.success && def.data.items?.[0].discount).toBe(0);
+  });
+
+  it("rejects a negative discount", () => {
+    const r = CreateInvoiceSchema.safeParse({
+      items: [{ description: "X", quantity: 1, unit_price: 100, discount: -5 }],
+    });
+    expect(r.success).toBe(false);
+  });
+});

src/__tests__/item-discount-totals.test.ts

@@ -0,0 +1,94 @@
+import { describe, it, expect, afterEach } from "vitest";
+import prisma from "../config/database";
+import { createOffer, getOfferTotals } from "../services/offers.service";
+import {
+  createInvoice,
+  getInvoiceListTotals,
+} from "../services/invoices.service";
+
+/**
+ * Per-item Sleva (% discount) must reduce the line NET — and on invoices the
+ * VAT is computed on the discounted net. Hits the real `app_test` DB through the
+ * service layer (suite convention), mirroring offer-invoice-totals.test.ts.
+ */
+
+const MARKER = "SLEVA-TOTALS-2096";
+const YEAR = 2096;
+const MONTH = 8; // invoice issue_date window [2096-08-01, 2096-09-01)
+const dateStr = `${YEAR}-0${MONTH}-15`;
+
+const offerIds: number[] = [];
+const invoiceIds: number[] = [];
+
+afterEach(async () => {
+  for (const id of offerIds)
+    await prisma.quotations.deleteMany({ where: { id } });
+  for (const id of invoiceIds)
+    await prisma.invoices.deleteMany({ where: { id } });
+  offerIds.length = 0;
+  invoiceIds.length = 0;
+  await prisma.number_sequences.deleteMany({
+    where: { type: { in: ["offer", "invoice"] } },
+  });
+});
+
+const amountFor = (
+  totals: { currency: string; amount: number }[],
+  currency: string,
+): number | undefined => totals.find((t) => t.currency === currency)?.amount;
+
+describe("offer per-item discount", () => {
+  it("reduces the offer NET total by the per-item percentage", async () => {
+    // 2 × 1000 with 10% off => 1800 net.
+    const res = await createOffer({
+      status: "draft",
+      currency: "CZK",
+      project_code: MARKER,
+      items: [
+        { description: "X", quantity: 2, unit_price: 1000, discount: 10 },
+      ],
+    });
+    if ("error" in res) throw new Error(JSON.stringify(res));
+    offerIds.push(res.id);
+
+    const { totals } = await getOfferTotals({ search: MARKER });
+    expect(amountFor(totals, "CZK")).toBe(1800);
+  });
+});
+
+describe("invoice per-item discount", () => {
+  it("computes VAT on the discounted net (gross = discounted net + VAT)", async () => {
+    // 2 × 1000 with 10% off => net 1800, VAT@21% = 378, gross 2178.
+    const inv = await createInvoice({
+      status: "draft",
+      currency: "CZK",
+      vat_rate: 21,
+      apply_vat: true,
+      issue_date: dateStr,
+      items: [
+        { description: "X", quantity: 2, unit_price: 1000, discount: 10 },
+      ],
+    });
+    invoiceIds.push(inv.id);
+
+    const { totals } = await getInvoiceListTotals({ month: MONTH, year: YEAR });
+    expect(amountFor(totals, "CZK")).toBe(2178);
+  });
+
+  it("treats a 100% discount line as zero", async () => {
+    const inv = await createInvoice({
+      status: "draft",
+      currency: "CZK",
+      vat_rate: 21,
+      apply_vat: true,
+      issue_date: dateStr,
+      items: [
+        { description: "Free", quantity: 5, unit_price: 200, discount: 100 },
+      ],
+    });
+    invoiceIds.push(inv.id);
+
+    const { totals } = await getInvoiceListTotals({ month: MONTH, year: YEAR });
+    expect(amountFor(totals, "CZK")).toBeUndefined(); // zero totals are dropped
+  });
+});

src/__tests__/modal-duplicate-close.test.ts

@@ -0,0 +1,117 @@
+import { describe, it, expect } from "vitest";
+import { readdirSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+
+/**
+ * Guards against the "two Zavřít buttons" bug class.
+ *
+ * The shared <Modal> (src/admin/ui/Modal.tsx) ALWAYS renders a primary submit
+ * button (text = `submitText`) and — unless `hideCancel` is set — a secondary
+ * cancel button (text = `cancelText`, default "Zrušit"). A close-only modal
+ * therefore sets `submitText="Zavřít"`; if it ALSO leaves the cancel button on,
+ * the user sees two buttons that both just close the dialog — and when
+ * `cancelText` is "Zavřít" too, two literally-identical "Zavřít" buttons
+ * (the production bug found on the "paid received invoice" detail modal).
+ *
+ * Rule enforced: any <Modal> whose `submitText` is a "Zavřít…" label (i.e. its
+ * only action is to close) MUST pass `hideCancel`. Close-only modals get a
+ * single button. See PlanCellModal / PlanCategoriesModal for the correct shape.
+ */
+
+const ADMIN_DIR = join(__dirname, "..", "admin");
+
+function tsxFiles(dir: string): string[] {
+  const out: string[] = [];
+  for (const entry of readdirSync(dir, { withFileTypes: true })) {
+    const full = join(dir, entry.name);
+    if (entry.isDirectory()) out.push(...tsxFiles(full));
+    else if (entry.name.endsWith(".tsx")) out.push(full);
+  }
+  return out;
+}
+
+/**
+ * Extract every `<Modal …>` opening-tag substring from a source string.
+ * Brace- and string-aware so arrow functions (`=>`) and conditional props
+ * (`{cond ? "a" : "b"}`) inside the tag don't terminate it early.
+ */
+function modalOpeningTags(src: string): string[] {
+  const tags: string[] = [];
+  let i = 0;
+  while ((i = src.indexOf("<Modal", i)) !== -1) {
+    const after = src[i + 6];
+    // Must be the <Modal> component, not <ModalSomething>.
+    if (after && !/[\s>/]/.test(after)) {
+      i += 6;
+      continue;
+    }
+    let depth = 0;
+    let quote: string | null = null;
+    let j = i + 6;
+    for (; j < src.length; j++) {
+      const c = src[j];
+      if (quote) {
+        if (c === quote && src[j - 1] !== "\\") quote = null;
+        continue;
+      }
+      if (c === '"' || c === "'" || c === "`") quote = c;
+      else if (c === "{") depth++;
+      else if (c === "}") depth--;
+      else if (c === ">" && depth === 0) break;
+    }
+    tags.push(src.slice(i, j + 1));
+    i = j + 1;
+  }
+  return tags;
+}
+
+/** Value of a JSX prop: `name="..."`, `name={...}` (balanced), or boolean. */
+function propValue(tag: string, name: string): string | null {
+  const re = new RegExp(`\\b${name}\\b`);
+  const m = re.exec(tag);
+  if (!m) return null;
+  let k = m.index + m[0].length;
+  while (k < tag.length && /\s/.test(tag[k])) k++;
+  if (tag[k] !== "=") return ""; // boolean prop (e.g. `hideCancel`)
+  k++;
+  while (k < tag.length && /\s/.test(tag[k])) k++;
+  if (tag[k] === '"' || tag[k] === "'") {
+    const q = tag[k];
+    const end = tag.indexOf(q, k + 1);
+    return tag.slice(k + 1, end);
+  }
+  if (tag[k] === "{") {
+    let depth = 0;
+    for (let p = k; p < tag.length; p++) {
+      if (tag[p] === "{") depth++;
+      else if (tag[p] === "}" && --depth === 0) return tag.slice(k, p + 1);
+    }
+  }
+  return null;
+}
+
+describe("Modal close-only buttons", () => {
+  const offenders: string[] = [];
+
+  for (const file of tsxFiles(ADMIN_DIR)) {
+    const src = readFileSync(file, "utf8");
+    for (const tag of modalOpeningTags(src)) {
+      const submit = propValue(tag, "submitText");
+      const isCloseOnly = submit != null && submit.includes("Zavřít");
+      const hasHideCancel = propValue(tag, "hideCancel") != null;
+      if (isCloseOnly && !hasHideCancel) {
+        const title = propValue(tag, "title") ?? "(no title)";
+        offenders.push(`${file.replace(ADMIN_DIR, "admin")} — ${title}`);
+      }
+    }
+  }
+
+  it("close-only modals (submitText='Zavřít') set hideCancel — no duplicate close button", () => {
+    expect(
+      offenders,
+      `These <Modal>s render a close-only 'Zavřít' submit alongside a redundant ` +
+        `cancel button (two buttons that both just close). Add hideCancel:\n` +
+        offenders.map((o) => `  • ${o}`).join("\n"),
+    ).toEqual([]);
+  });
+});

src/__tests__/money.test.ts

@@ -0,0 +1,22 @@
+import { describe, it, expect } from "vitest";
+import { lineNet } from "../utils/money";
+
+describe("lineNet (per-item discounted net)", () => {
+  it("returns qty × unit_price when there is no discount", () => {
+    expect(lineNet(2, 1000, 0)).toBe(2000);
+  });
+
+  it("applies a percentage discount to the line net", () => {
+    expect(lineNet(2, 1000, 10)).toBe(1800);
+  });
+
+  it("treats a 100% discount as zero", () => {
+    expect(lineNet(3, 500, 100)).toBe(0);
+  });
+
+  it("treats null/undefined/NaN discount as no discount", () => {
+    expect(lineNet(2, 1000, null)).toBe(2000);
+    expect(lineNet(2, 1000, undefined)).toBe(2000);
+    expect(lineNet(2, 1000, NaN)).toBe(2000);
+  });
+});

src/__tests__/selected-custom-fields.test.ts

@@ -0,0 +1,129 @@
+import { describe, it, expect } from "vitest";
+import {
+  encodeSelectedCustomFields,
+  parseSelectedCustomFields,
+} from "../utils/custom-fields";
+import { afterAll } from "vitest";
+import { createOffer, getOffer } from "../services/offers.service";
+import { renderOfferHtml } from "../routes/admin/offers-pdf";
+import type { OfferForPdf } from "../routes/admin/offers-pdf";
+import type { company_settings } from "@prisma/client";
+import prisma from "../config/database";
+
+describe("selected custom fields encode/decode", () => {
+  it("encodes a non-empty index array to a JSON string", () => {
+    expect(encodeSelectedCustomFields([0, 2])).toBe("[0,2]");
+  });
+
+  it("encodes empty / non-array to null", () => {
+    expect(encodeSelectedCustomFields([])).toBeNull();
+    expect(encodeSelectedCustomFields(undefined)).toBeNull();
+    expect(encodeSelectedCustomFields("nope")).toBeNull();
+  });
+
+  it("dedupes, sorts, and drops invalid entries before encoding", () => {
+    expect(encodeSelectedCustomFields([2, 0, 2, -1, 1.5, 3])).toBe("[0,2,3]");
+  });
+
+  it("parses a stored string back to a number array", () => {
+    expect(parseSelectedCustomFields("[0,2]")).toEqual([0, 2]);
+  });
+
+  it("parses null / malformed to an empty array", () => {
+    expect(parseSelectedCustomFields(null)).toEqual([]);
+    expect(parseSelectedCustomFields("")).toEqual([]);
+    expect(parseSelectedCustomFields("{garbage")).toEqual([]);
+    expect(parseSelectedCustomFields('"x"')).toEqual([]);
+  });
+
+  it("parses already-array input (defensive) and filters invalid", () => {
+    expect(parseSelectedCustomFields([0, "1", 2, -3] as unknown)).toEqual([
+      0, 2,
+    ]);
+  });
+});
+
+describe("offers selected_custom_fields round-trip", () => {
+  const created: number[] = [];
+  afterAll(async () => {
+    if (created.length)
+      await prisma.quotations.deleteMany({ where: { id: { in: created } } });
+  });
+
+  it("persists selection on create and decodes it on detail", async () => {
+    const res = (await createOffer({
+      status: "draft",
+      selected_custom_fields: [2, 0, 0],
+    })) as { id: number };
+    created.push(res.id);
+
+    const row = await prisma.quotations.findUnique({ where: { id: res.id } });
+    expect(row?.selected_custom_fields).toBe("[0,2]");
+
+    const detail = await getOffer(res.id);
+    expect(detail?.selected_custom_fields).toEqual([0, 2]);
+  });
+
+  it("stores null when selection is empty", async () => {
+    const res = (await createOffer({
+      status: "draft",
+      selected_custom_fields: [],
+    })) as { id: number };
+    created.push(res.id);
+    const row = await prisma.quotations.findUnique({ where: { id: res.id } });
+    expect(row?.selected_custom_fields).toBeNull();
+  });
+});
+
+describe("offer PDF prints only selected company custom fields", () => {
+  // Two company custom fields; the document selects only index 0.
+  const settings = {
+    company_name: "Test s.r.o.",
+    custom_fields: JSON.stringify({
+      fields: [
+        { name: "Email", value: "selected@example.com", showLabel: false },
+        { name: "Web", value: "notselected.example.com", showLabel: false },
+      ],
+      field_order: [],
+    }),
+    logo_data: null,
+  } as unknown as company_settings;
+
+  const baseQuotation = {
+    quotation_number: "TEST-2098-001",
+    language: "EN",
+    currency: "EUR",
+    valid_until: new Date("2098-01-01"),
+    project_code: null,
+    created_at: new Date("2098-01-01"),
+    customers: { name: "Cust" },
+    quotation_items: [],
+    scope_sections: [],
+  };
+
+  it("renders the selected custom field and omits the non-selected one", () => {
+    const html = renderOfferHtml(
+      {
+        ...baseQuotation,
+        selected_custom_fields: "[0]",
+      } as unknown as OfferForPdf,
+      settings,
+    );
+    expect(html).toContain("selected@example.com");
+    expect(html).not.toContain("notselected.example.com");
+  });
+
+  it("prints NO company custom fields when the document selects none", () => {
+    // The company call site always passes a parsed array; a null column
+    // decodes to [] → empty selection → no custom fields on the document.
+    const html = renderOfferHtml(
+      {
+        ...baseQuotation,
+        selected_custom_fields: null,
+      } as unknown as OfferForPdf,
+      settings,
+    );
+    expect(html).not.toContain("selected@example.com");
+    expect(html).not.toContain("notselected.example.com");
+  });
+});

src/__tests__/version-header.test.ts

@@ -0,0 +1,24 @@
+import { describe, it, expect } from "vitest";
+import Fastify from "fastify";
+import { registerVersionHeader, readAppVersion } from "../middleware/version";
+
+/**
+ * The server stamps every response with X-App-Version so the SPA can detect a
+ * deploy (the client compares it to the version baked into its bundle).
+ */
+
+describe("registerVersionHeader", () => {
+  it("adds X-App-Version to responses", async () => {
+    const app = Fastify({ logger: false });
+    registerVersionHeader(app, "9.9.9");
+    app.get("/ping", async () => ({ ok: true }));
+
+    const res = await app.inject({ method: "GET", url: "/ping" });
+    expect(res.headers["x-app-version"]).toBe("9.9.9");
+    await app.close();
+  });
+
+  it("defaults to the package.json version (semver string)", () => {
+    expect(readAppVersion()).toMatch(/^\d+\.\d+\.\d+/);
+  });
+});

src/admin/AdminApp.tsx

@@ -7,65 +7,97 @@ import { queryClient } from "./lib/queryClient";
 import ErrorBoundary from "./components/ErrorBoundary";
 import AppShell from "./ui/AppShell";
 import AlertContainer from "./components/AlertContainer";
+import UpdateBanner from "./components/UpdateBanner";
+import { lazyWithReload } from "./utils/lazyWithReload";
 import MuiProvider from "./ui/MuiProvider";
 import { LoadingState } from "./ui";
 import Login from "./pages/Login";
 import Dashboard from "./pages/Dashboard";
 
-const Odin = lazy(() => import("./pages/Odin"));
-const Users = lazy(() => import("./pages/Users"));
-const Attendance = lazy(() => import("./pages/Attendance"));
-const AttendanceHistory = lazy(() => import("./pages/AttendanceHistory"));
-const AttendanceAdmin = lazy(() => import("./pages/AttendanceAdmin"));
-const AttendanceBalances = lazy(() => import("./pages/AttendanceBalances"));
-const AttendanceCreate = lazy(() => import("./pages/AttendanceCreate"));
-const LeaveRequests = lazy(() => import("./pages/LeaveRequests"));
-const LeaveApproval = lazy(() => import("./pages/LeaveApproval"));
-const AttendanceLocation = lazy(() => import("./pages/AttendanceLocation"));
-const PlanWork = lazy(() => import("./pages/PlanWork"));
-const Trips = lazy(() => import("./pages/Trips"));
-const TripsHistory = lazy(() => import("./pages/TripsHistory"));
-const TripsAdmin = lazy(() => import("./pages/TripsAdmin"));
-const Vehicles = lazy(() => import("./pages/Vehicles"));
-const Offers = lazy(() => import("./pages/Offers"));
-const OfferDetail = lazy(() => import("./pages/OfferDetail"));
-const OffersCustomers = lazy(() => import("./pages/OffersCustomers"));
-const OffersTemplates = lazy(() => import("./pages/OffersTemplates"));
-const Orders = lazy(() => import("./pages/Orders"));
-const OrderDetail = lazy(() => import("./pages/OrderDetail"));
-const IssuedOrderDetail = lazy(() => import("./pages/IssuedOrderDetail"));
-const Projects = lazy(() => import("./pages/Projects"));
-const ProjectDetail = lazy(() => import("./pages/ProjectDetail"));
-const Invoices = lazy(() => import("./pages/Invoices"));
-const InvoiceDetail = lazy(() => import("./pages/InvoiceDetail"));
-const Settings = lazy(() => import("./pages/Settings"));
-const AuditLog = lazy(() => import("./pages/AuditLog"));
-const NotFound = lazy(() => import("./pages/NotFound"));
-const Warehouse = lazy(() => import("./pages/Warehouse"));
-const WarehouseItems = lazy(() => import("./pages/WarehouseItems"));
-const WarehouseItemDetail = lazy(() => import("./pages/WarehouseItemDetail"));
-const WarehouseReceipts = lazy(() => import("./pages/WarehouseReceipts"));
-const WarehouseReceiptDetail = lazy(
+const Odin = lazyWithReload(() => import("./pages/Odin"));
+const Users = lazyWithReload(() => import("./pages/Users"));
+const Attendance = lazyWithReload(() => import("./pages/Attendance"));
+const AttendanceHistory = lazyWithReload(
+  () => import("./pages/AttendanceHistory"),
+);
+const AttendanceAdmin = lazyWithReload(() => import("./pages/AttendanceAdmin"));
+const AttendanceBalances = lazyWithReload(
+  () => import("./pages/AttendanceBalances"),
+);
+const AttendanceCreate = lazyWithReload(
+  () => import("./pages/AttendanceCreate"),
+);
+const LeaveRequests = lazyWithReload(() => import("./pages/LeaveRequests"));
+const LeaveApproval = lazyWithReload(() => import("./pages/LeaveApproval"));
+const AttendanceLocation = lazyWithReload(
+  () => import("./pages/AttendanceLocation"),
+);
+const PlanWork = lazyWithReload(() => import("./pages/PlanWork"));
+const Trips = lazyWithReload(() => import("./pages/Trips"));
+const TripsHistory = lazyWithReload(() => import("./pages/TripsHistory"));
+const TripsAdmin = lazyWithReload(() => import("./pages/TripsAdmin"));
+const Vehicles = lazyWithReload(() => import("./pages/Vehicles"));
+const Offers = lazyWithReload(() => import("./pages/Offers"));
+const OfferDetail = lazyWithReload(() => import("./pages/OfferDetail"));
+const OffersCustomers = lazyWithReload(() => import("./pages/OffersCustomers"));
+const OffersTemplates = lazyWithReload(() => import("./pages/OffersTemplates"));
+const Orders = lazyWithReload(() => import("./pages/Orders"));
+const OrderDetail = lazyWithReload(() => import("./pages/OrderDetail"));
+const IssuedOrderDetail = lazyWithReload(
+  () => import("./pages/IssuedOrderDetail"),
+);
+const Projects = lazyWithReload(() => import("./pages/Projects"));
+const ProjectDetail = lazyWithReload(() => import("./pages/ProjectDetail"));
+const Invoices = lazyWithReload(() => import("./pages/Invoices"));
+const InvoiceDetail = lazyWithReload(() => import("./pages/InvoiceDetail"));
+const Settings = lazyWithReload(() => import("./pages/Settings"));
+const AuditLog = lazyWithReload(() => import("./pages/AuditLog"));
+const NotFound = lazyWithReload(() => import("./pages/NotFound"));
+const Warehouse = lazyWithReload(() => import("./pages/Warehouse"));
+const WarehouseItems = lazyWithReload(() => import("./pages/WarehouseItems"));
+const WarehouseItemDetail = lazyWithReload(
+  () => import("./pages/WarehouseItemDetail"),
+);
+const WarehouseReceipts = lazyWithReload(
+  () => import("./pages/WarehouseReceipts"),
+);
+const WarehouseReceiptDetail = lazyWithReload(
   () => import("./pages/WarehouseReceiptDetail"),
 );
-const WarehouseReceiptForm = lazy(() => import("./pages/WarehouseReceiptForm"));
-const WarehouseIssues = lazy(() => import("./pages/WarehouseIssues"));
-const WarehouseIssueDetail = lazy(() => import("./pages/WarehouseIssueDetail"));
-const WarehouseIssueForm = lazy(() => import("./pages/WarehouseIssueForm"));
-const WarehouseReservations = lazy(
+const WarehouseReceiptForm = lazyWithReload(
+  () => import("./pages/WarehouseReceiptForm"),
+);
+const WarehouseIssues = lazyWithReload(() => import("./pages/WarehouseIssues"));
+const WarehouseIssueDetail = lazyWithReload(
+  () => import("./pages/WarehouseIssueDetail"),
+);
+const WarehouseIssueForm = lazyWithReload(
+  () => import("./pages/WarehouseIssueForm"),
+);
+const WarehouseReservations = lazyWithReload(
   () => import("./pages/WarehouseReservations"),
 );
-const WarehouseInventory = lazy(() => import("./pages/WarehouseInventory"));
-const WarehouseInventoryDetail = lazy(
+const WarehouseInventory = lazyWithReload(
+  () => import("./pages/WarehouseInventory"),
+);
+const WarehouseInventoryDetail = lazyWithReload(
   () => import("./pages/WarehouseInventoryDetail"),
 );
-const WarehouseInventoryForm = lazy(
+const WarehouseInventoryForm = lazyWithReload(
   () => import("./pages/WarehouseInventoryForm"),
 );
-const WarehouseReports = lazy(() => import("./pages/WarehouseReports"));
-const WarehouseSuppliers = lazy(() => import("./pages/WarehouseSuppliers"));
-const WarehouseLocations = lazy(() => import("./pages/WarehouseLocations"));
-const WarehouseCategories = lazy(() => import("./pages/WarehouseCategories"));
+const WarehouseReports = lazyWithReload(
+  () => import("./pages/WarehouseReports"),
+);
+const WarehouseSuppliers = lazyWithReload(
+  () => import("./pages/WarehouseSuppliers"),
+);
+const WarehouseLocations = lazyWithReload(
+  () => import("./pages/WarehouseLocations"),
+);
+const WarehouseCategories = lazyWithReload(
+  () => import("./pages/WarehouseCategories"),
+);
 const UiKit = import.meta.env.DEV ? lazy(() => import("./pages/UiKit")) : null;
 
 export default function AdminApp() {
@@ -75,6 +107,7 @@ export default function AdminApp() {
         <AlertProvider>
           <QueryClientProvider client={queryClient}>
             <AlertContainer />
+            <UpdateBanner />
             <ErrorBoundary>
               <Suspense fallback={<LoadingState />}>
                 <Routes>

src/admin/components/PlanCellModal.tsx

@@ -488,6 +488,7 @@ function DayInRangeModal(
       onClose={onClose}
       onSubmit={onClose}
       submitText="Zavřít — ponechat rozsah beze změny"
+      hideCancel
       maxWidth="md"
     >
       <Typography variant="body2" sx={{ mb: 2 }}>

src/admin/components/PlanGrid.tsx

@@ -491,9 +491,11 @@ export default function PlanGrid({
   }, [projects]);
   // Memoize the day list so it isn't rebuilt on every render (only when the
   // visible range changes). Stable identity also keeps the row map cheap.
+  const dateFrom = data?.date_from;
+  const dateTo = data?.date_to;
   const days = useMemo(
-    () => (data ? eachDay(data.date_from, data.date_to) : []),
-    [data?.date_from, data?.date_to],
+    () => (dateFrom && dateTo ? eachDay(dateFrom, dateTo) : []),
+    [dateFrom, dateTo],
   );
 
   if (!data) return <LoadingState />;

src/admin/components/ShiftFormModal.tsx

@@ -19,46 +19,22 @@ import {
 } from "../utils/attendanceHelpers";
 
 // ---------- Shared types ----------
-
-export interface ShiftFormData {
-  user_id: string;
-  shift_date: string;
-  leave_type: string;
-  leave_hours: number;
-  arrival_date: string;
-  arrival_time: string;
-  break_start_date: string;
-  break_start_time: string;
-  break_end_date: string;
-  break_end_time: string;
-  departure_date: string;
-  departure_time: string;
-  notes: string;
-}
-
-export interface ProjectLog {
-  _key?: string;
-  id?: number;
-  project_id: string | number;
-  hours: string | number;
-  minutes: string | number;
-}
-
-export interface Project {
-  id: number | string;
-  project_number: string;
-  name: string;
-}
-
-export interface User {
-  id: number | string;
-  name: string;
-}
-
-export interface EditingRecord {
-  user_name: string;
-  shift_date: string;
-}
+// Definitions live in the dependency-free ./shiftFormTypes module; re-exported
+// here so existing importers of ShiftFormModal keep working.
+export type {
+  ShiftFormData,
+  ProjectLog,
+  Project,
+  User,
+  EditingRecord,
+} from "./shiftFormTypes";
+import type {
+  ShiftFormData,
+  ProjectLog,
+  Project,
+  User,
+  EditingRecord,
+} from "./shiftFormTypes";
 
 // ---------- Sub-component props ----------
 

src/admin/components/UpdateBanner.tsx

@@ -0,0 +1,35 @@
+import { useSyncExternalStore } from "react";
+import Snackbar from "@mui/material/Snackbar";
+import Button from "@mui/material/Button";
+import { subscribeNewVersion, getNewVersion } from "../utils/appVersion";
+
+/**
+ * Shows a persistent banner when the server reports a newer build than the one
+ * this tab is running (detected via the X-App-Version header in apiFetch). The
+ * reload is user-initiated — we never force it, so an in-progress form is safe.
+ */
+export default function UpdateBanner() {
+  const newVersion = useSyncExternalStore(
+    subscribeNewVersion,
+    getNewVersion,
+    () => null,
+  );
+
+  return (
+    <Snackbar
+      open={Boolean(newVersion)}
+      anchorOrigin={{ vertical: "bottom", horizontal: "center" }}
+      message="Je k dispozici nová verze aplikace."
+      action={
+        <Button
+          color="primary"
+          size="small"
+          variant="contained"
+          onClick={() => window.location.reload()}
+        >
+          Obnovit
+        </Button>
+      }
+    />
+  );
+}

src/admin/components/dashboard/DashProfile.tsx

@@ -262,8 +262,9 @@ export default function DashProfile({
         initial={reduce ? false : { opacity: 0, y: 12 }}
         animate={reduce ? undefined : { opacity: 1, y: 0 }}
         transition={{ duration: 0.25, delay: 0.15 }}
+        style={{ height: "100%" }}
       >
-        <Card>
+        <Card sx={{ height: "100%" }}>
           <Box
             sx={{
               display: "flex",

src/admin/components/dashboard/DashSessions.tsx

@@ -132,8 +132,9 @@ export default function DashSessions() {
         initial={reduce ? false : { opacity: 0, y: 12 }}
         animate={reduce ? undefined : { opacity: 1, y: 0 }}
         transition={{ duration: 0.25, delay: 0.15 }}
+        style={{ height: "100%" }}
       >
-        <Card sx={{ display: "flex", flexDirection: "column" }}>
+        <Card sx={{ display: "flex", flexDirection: "column", height: "100%" }}>
           <Box
             sx={{
               display: "flex",

src/admin/components/document/CustomFieldsPrintPicker.tsx

@@ -0,0 +1,60 @@
+import { FormControlLabel, Checkbox, Box, Typography } from "@mui/material";
+import type { CompanySettingsCustomField } from "../../lib/queries/settings";
+
+interface Props {
+  /** Company custom field definitions, in positional order (index = print key). */
+  fields: CompanySettingsCustomField[];
+  /** Currently selected positional indices. */
+  selected: number[];
+  /** Read-only (document not editable / locked by another user). */
+  disabled?: boolean;
+  onChange: (next: number[]) => void;
+}
+
+/**
+ * Per-document picker: choose which COMPANY custom fields print on this
+ * document's PDF. Selection is positional (matches the PDF `custom_<i>` keys).
+ * Renders nothing when the company has defined no printable custom fields.
+ */
+export default function CustomFieldsPrintPicker({
+  fields,
+  selected,
+  disabled = false,
+  onChange,
+}: Props) {
+  const printable = fields.filter((f) => (f.value || "").trim());
+  if (printable.length === 0) return null;
+
+  const toggle = (idx: number, checked: boolean) => {
+    const set = new Set(selected);
+    if (checked) set.add(idx);
+    else set.delete(idx);
+    onChange([...set].sort((a, b) => a - b));
+  };
+
+  return (
+    <Box>
+      <Typography variant="subtitle2" sx={{ mb: 0.5 }}>
+        Vlastní pole na PDF
+      </Typography>
+      {fields.map((f, idx) => {
+        if (!(f.value || "").trim()) return null;
+        const label = (f.name || "").trim() ? `${f.name}: ${f.value}` : f.value;
+        return (
+          <FormControlLabel
+            key={idx}
+            control={
+              <Checkbox
+                size="small"
+                checked={selected.includes(idx)}
+                disabled={disabled}
+                onChange={(e) => toggle(idx, e.target.checked)}
+              />
+            }
+            label={<Typography variant="body2">{label}</Typography>}
+          />
+        );
+      })}
+    </Box>
+  );
+}

src/admin/components/document/DocumentItemsEditor.tsx

@@ -49,10 +49,31 @@ export interface DocumentItem {
   quantity: string | number;
   unit: string;
   unit_price: string | number;
+  /** Per-item discount as a percentage (0–100). Offers only; 0 elsewhere. */
+  discount: string | number;
   /** Offers only — undefined (issued orders) counts as included. */
   is_included_in_total?: boolean;
 }
 
+/**
+ * Discount input styling: centered, and with the native number spinners hidden
+ * so a 3-digit value ("100") isn't clipped under the up/down arrows.
+ */
+const discountInputSx = {
+  "& input": { textAlign: "center" },
+  "& input[type=number]": { MozAppearance: "textfield" as const },
+  "& input::-webkit-outer-spin-button, & input::-webkit-inner-spin-button": {
+    WebkitAppearance: "none",
+    margin: 0,
+  },
+};
+
+/** NET of one line after its per-item percentage discount. */
+const discountedLineNet = (item: DocumentItem): number =>
+  (Number(item.quantity) || 0) *
+  (Number(item.unit_price) || 0) *
+  (1 - (Number(item.discount) || 0) / 100);
+
 let documentItemKeyCounter = 0;
 
 /** Unique client-side key for a (new or hydrated) document item row. */
@@ -66,6 +87,7 @@ export const emptyDocumentItem = (): DocumentItem => ({
   quantity: 1,
   unit: "ks",
   unit_price: 0,
+  discount: 0,
   is_included_in_total: true,
 });
 
@@ -73,9 +95,7 @@ export const emptyDocumentItem = (): DocumentItem => ({
 export const documentItemsTotal = (items: DocumentItem[]): number =>
   items.reduce(
     (sum, it) =>
-      it.is_included_in_total === false
-        ? sum
-        : sum + (Number(it.quantity) || 0) * (Number(it.unit_price) || 0),
+      it.is_included_in_total === false ? sum : sum + discountedLineNet(it),
     0,
   );
 
@@ -111,6 +131,7 @@ function SortableItemRow({
   readOnly,
   canDelete,
   showIncludedInTotal,
+  showDiscount,
   itemDescriptionMaxLength,
   onUpdate,
   onRemove,
@@ -121,6 +142,7 @@ function SortableItemRow({
   readOnly: boolean;
   canDelete: boolean;
   showIncludedInTotal: boolean;
+  showDiscount: boolean;
   itemDescriptionMaxLength: number;
   onUpdate: (field: keyof DocumentItem, value: string | boolean) => void;
   onRemove: () => void;
@@ -143,8 +165,7 @@ function SortableItemRow({
     position: "relative" as const,
     zIndex: isDragging ? 10 : undefined,
   };
-  const lineTotal =
-    (Number(item.quantity) || 0) * (Number(item.unit_price) || 0);
+  const lineTotal = discountedLineNet(item);
 
   if (isMobile) {
     return (
@@ -253,6 +274,17 @@ function SortableItemRow({
             InputProps={{ readOnly }}
             sx={{ "& input": { textAlign: "right" } }}
           />
+          {showDiscount && (
+            <TextField
+              label="Sleva %"
+              type="number"
+              value={item.discount ?? ""}
+              onChange={(e) => onUpdate("discount", e.target.value)}
+              slotProps={{ htmlInput: { min: "0", max: "100", step: "any" } }}
+              InputProps={{ readOnly }}
+              sx={discountInputSx}
+            />
+          )}
         </Box>
         <Box
           sx={{
@@ -396,6 +428,18 @@ function SortableItemRow({
           sx={{ "& input": { textAlign: "right" } }}
         />
       </TableCell>
+      {showDiscount && (
+        <TableCell>
+          <TextField
+            type="number"
+            value={item.discount ?? ""}
+            onChange={(e) => onUpdate("discount", e.target.value)}
+            slotProps={{ htmlInput: { min: "0", max: "100", step: "any" } }}
+            InputProps={{ readOnly }}
+            sx={discountInputSx}
+          />
+        </TableCell>
+      )}
       {showIncludedInTotal && (
         <TableCell align="center">
           <Checkbox
@@ -442,10 +486,18 @@ interface DocumentItemsEditorProps {
   error?: string;
   /** Render the offers-only "V ceně" (is_included_in_total) column. */
   showIncludedInTotal?: boolean;
+  /** Render the per-item "Sleva %" discount column (offers only). */
+  showDiscount?: boolean;
   /** Schema cap for the detailed description (offers 8000, issued orders 5000). */
   itemDescriptionMaxLength?: number;
   /** Optional page-specific control (e.g. item-template Select) next to the add button. */
   templatesSlot?: ReactNode;
+  /**
+   * Allow removing every row so the list can be empty (issued orders may be
+   * issued by sections alone). Default false keeps the offers/invoices rule of
+   * at least one item.
+   */
+  allowEmpty?: boolean;
 }
 
 /**
@@ -460,8 +512,10 @@ export default function DocumentItemsEditor({
   readOnly,
   error,
   showIncludedInTotal = false,
+  showDiscount = false,
   itemDescriptionMaxLength = 5000,
   templatesSlot,
+  allowEmpty = false,
 }: DocumentItemsEditorProps) {
   const theme = useTheme();
   const isMobile = useMediaQuery(theme.breakpoints.down("sm"));
@@ -491,10 +545,13 @@ export default function DocumentItemsEditor({
   const addItem = () => onChange([...items, emptyDocumentItem()]);
 
   const removeItem = (index: number) => {
-    if (items.length <= 1) return;
+    if (!allowEmpty && items.length <= 1) return;
     onChange(items.filter((_, i) => i !== index));
   };
 
+  // When allowEmpty, even the last row is deletable (list may go to zero).
+  const canDeleteRow = allowEmpty || items.length > 1;
+
   const handleDragEnd = (event: DragEndEvent) => {
     const { active, over } = event;
     if (!over || active.id === over.id) return;
@@ -561,8 +618,9 @@ export default function DocumentItemsEditor({
                   index={index}
                   currency={currency}
                   readOnly={readOnly}
-                  canDelete={items.length > 1}
+                  canDelete={canDeleteRow}
                   showIncludedInTotal={showIncludedInTotal}
+                  showDiscount={showDiscount}
                   itemDescriptionMaxLength={itemDescriptionMaxLength}
                   onUpdate={(field, value) => updateItem(index, field, value)}
                   onRemove={() => removeItem(index)}
@@ -594,6 +652,11 @@ export default function DocumentItemsEditor({
                     <TableCell sx={{ width: "8rem" }} align="center">
                       Jedn. cena
                     </TableCell>
+                    {showDiscount && (
+                      <TableCell sx={{ width: "7rem" }} align="center">
+                        Sleva %
+                      </TableCell>
+                    )}
                     {showIncludedInTotal && (
                       <TableCell sx={{ width: "4rem" }} align="center">
                         V ceně
@@ -613,8 +676,9 @@ export default function DocumentItemsEditor({
                       index={index}
                       currency={currency}
                       readOnly={readOnly}
-                      canDelete={items.length > 1}
+                      canDelete={canDeleteRow}
                       showIncludedInTotal={showIncludedInTotal}
+                      showDiscount={showDiscount}
                       itemDescriptionMaxLength={itemDescriptionMaxLength}
                       onUpdate={(field, value) =>
                         updateItem(index, field, value)

src/admin/components/shiftFormTypes.ts

@@ -0,0 +1,44 @@
+// Shared attendance shift-form types, kept in a dependency-free module so they
+// can be imported without pulling in the ShiftFormModal component graph (which
+// reaches MUI/import.meta files that don't compile under the CommonJS test
+// project). ShiftFormModal re-exports these for backward compatibility.
+
+export interface ShiftFormData {
+  user_id: string;
+  shift_date: string;
+  leave_type: string;
+  leave_hours: number;
+  arrival_date: string;
+  arrival_time: string;
+  break_start_date: string;
+  break_start_time: string;
+  break_end_date: string;
+  break_end_time: string;
+  departure_date: string;
+  departure_time: string;
+  notes: string;
+}
+
+export interface ProjectLog {
+  _key?: string;
+  id?: number;
+  project_id: string | number;
+  hours: string | number;
+  minutes: string | number;
+}
+
+export interface Project {
+  id: number | string;
+  project_number: string;
+  name: string;
+}
+
+export interface User {
+  id: number | string;
+  name: string;
+}
+
+export interface EditingRecord {
+  user_name: string;
+  shift_date: string;
+}

src/admin/components/warehouse/ReservationPicker.tsx

@@ -1,4 +1,4 @@
-import { useEffect } from "react";
+import { useEffect, useMemo } from "react";
 import { useQuery } from "@tanstack/react-query";
 import MenuItem from "@mui/material/MenuItem";
 import { Select } from "../../ui";
@@ -26,7 +26,7 @@ export default function ReservationPicker({
     }),
   );
 
-  const reservations = result?.data ?? [];
+  const reservations = useMemo(() => result?.data ?? [], [result?.data]);
 
   // When item/project change, the loaded reservation list changes. If the
   // currently-selected reservation is no longer available, clear it and notify

src/admin/context/AlertContext.tsx

@@ -43,9 +43,10 @@ export function AlertProvider({ children }: { children: ReactNode }) {
   const timeoutsRef = useRef<Set<ReturnType<typeof setTimeout>>>(new Set());
 
   useEffect(() => {
+    const timeouts = timeoutsRef.current;
     return () => {
-      timeoutsRef.current.forEach(clearTimeout);
-      timeoutsRef.current.clear();
+      timeouts.forEach(clearTimeout);
+      timeouts.clear();
     };
   }, []);
 

src/admin/context/AuthContext.tsx

@@ -122,6 +122,11 @@ export function AuthProvider({ children }: { children: ReactNode }) {
         );
       }
     },
+    // silentRefresh and setAccessTokenFn reference each other; listing
+    // silentRefresh here would recreate both callbacks on every render. The
+    // scheduled silentRefresh is safe to call as a stable closure because all
+    // of its state lives in refs.
+    // eslint-disable-next-line react-hooks/exhaustive-deps
     [],
   );
 

src/admin/hooks/useAttendanceAdmin.ts

@@ -29,7 +29,7 @@ import type {
   ProjectLog,
   Project,
   User,
-} from "../components/ShiftFormModal";
+} from "../components/shiftFormTypes";
 
 // ---------------------------------------------------------------------------
 // Types
@@ -344,14 +344,25 @@ function escapeHtml(str: string): string {
     .replace(/'/g, "'");
 }
 
-function buildProjectLogsHtml(record: Record<string, any>): string {
+/** Shape of the print endpoint payload consumed by the HTML builders. */
+interface PrintData {
+  month: string;
+  month_name: string;
+  selected_user_name?: string | null;
+  user_totals: Record<string, UserTotal>;
+}
+
+export function buildProjectLogsHtml(record: AttendanceRecord): string {
   if (record.project_logs && record.project_logs.length > 0) {
     return record.project_logs
-      .map((log: any) => {
+      .map((log) => {
         let h: number, m: number;
         if (log.hours !== null && log.hours !== undefined) {
-          h = parseInt(log.hours) || 0;
-          m = parseInt(log.minutes) || 0;
+          // hours/minutes arrive as string or number — String() before parseInt
+          // (parseInt already coerces to string internally, so this is a no-op
+          // at runtime, it just satisfies parseInt's string parameter type).
+          h = parseInt(String(log.hours)) || 0;
+          m = parseInt(String(log.minutes)) || 0;
         } else if (log.started_at && log.ended_at) {
           const mins = Math.max(
             0,
@@ -374,13 +385,13 @@ function buildProjectLogsHtml(record: Record<string, any>): string {
   return escapeHtml(record.project_name || "—");
 }
 
-function buildUserSectionHtml(
+export function buildUserSectionHtml(
   userId: string,
-  userData: Record<string, any>,
-  printData: Record<string, any>,
+  userData: UserTotal,
+  printData: PrintData,
 ): string {
   // Build a date-keyed lookup of the user's records.
-  const recordsByDate = new Map<string, Record<string, any>>();
+  const recordsByDate = new Map<string, AttendanceRecord>();
   for (const r of userData.records || []) {
     recordsByDate.set(normalizeDateStr(r.shift_date), r);
   }
@@ -391,7 +402,7 @@ function buildUserSectionHtml(
   const mo = parseInt(monthStr, 10);
   const daysInMonth = getDaysInMonth(yr, mo);
 
-  const userRecords = (userData.records || []) as Record<string, any>[];
+  const userRecords = userData.records ?? [];
 
   const rows: string[] = [];
   for (let d = 1; d <= daysInMonth; d++) {
@@ -588,8 +599,8 @@ function buildUserSectionHtml(
   </div>`;
 }
 
-function buildPrintHtml(
-  pData: Record<string, any>,
+export function buildPrintHtml(
+  pData: PrintData,
   userSections: string,
   emptyMsg: string,
   filterNote: string,
@@ -1330,7 +1341,7 @@ export default function useAttendanceAdmin({ alert }: AlertContext) {
         const pData = result.data;
         const userSections = Object.entries(pData.user_totals)
           .map(([uid, uData]) =>
-            buildUserSectionHtml(uid, uData as Record<string, any>, pData),
+            buildUserSectionHtml(uid, uData as UserTotal, pData),
           )
           .join("");
         const emptyMsg =

src/admin/hooks/usePlanWork.ts

@@ -200,7 +200,7 @@ export function usePlanWork({ initialDate, canEdit }: UsePlanWorkArgs) {
   // Snapshot the currently-cached grid for a given key. Returns
   // `undefined` if there's nothing cached (we don't patch empty data).
   function snapshotGrid(key: readonly unknown[]): GridData | undefined {
-    return qc.getQueryData<GridData>(key as any);
+    return qc.getQueryData<GridData>(key);
   }
 
   // Apply a per-date cell patch to the cached grid at `key`. Returns the
@@ -312,7 +312,7 @@ export function usePlanWork({ initialDate, canEdit }: UsePlanWorkArgs) {
   // `ctx` may be `undefined` (e.g. if onMutate itself threw) — guarded below.
   function rollbackCells(ctx: CellRollback | undefined) {
     if (!ctx || !ctx.rolled) return;
-    const prev = qc.getQueryData<GridData>(ctx.key as any);
+    const prev = qc.getQueryData<GridData>(ctx.key);
     if (!prev) return;
     const userPrev = prev.cells[ctx.userId] ?? {};
     const userNext = { ...userPrev };
@@ -379,7 +379,7 @@ export function usePlanWork({ initialDate, canEdit }: UsePlanWorkArgs) {
       // Find the user that owns this entry in the current grid by
       // looking for any cell with entryId === id (we already know
       // the id from vars; it doesn't change across the update).
-      const grid = qc.getQueryData<GridData>(currentGridKey as any);
+      const grid = qc.getQueryData<GridData>(currentGridKey);
       let ownerUserId: number | null = null;
       if (grid) {
         for (const [uidStr, byDate] of Object.entries(grid.cells)) {
@@ -430,7 +430,7 @@ export function usePlanWork({ initialDate, canEdit }: UsePlanWorkArgs) {
       // For delete we need to know the entry's user_id and full range.
       // Look it up from the current grid: find the user that has a cell
       // with entryId === id, and read rangeFrom/rangeTo from that cell.
-      const grid = qc.getQueryData<GridData>(currentGridKey as any);
+      const grid = qc.getQueryData<GridData>(currentGridKey);
       if (!grid) return null;
       for (const [uidStr, byDate] of Object.entries(grid.cells)) {
         let entryRange: { from: string; to: string } | null = null;
@@ -511,7 +511,7 @@ export function usePlanWork({ initialDate, canEdit }: UsePlanWorkArgs) {
     onMutate: (vars): CellRollback => {
       // Find the user/date for this overrideId in the current grid, then
       // patch that single cell with the new values.
-      const grid = qc.getQueryData<GridData>(currentGridKey as any);
+      const grid = qc.getQueryData<GridData>(currentGridKey);
       if (!grid) return null;
       for (const [uidStr, byDate] of Object.entries(grid.cells)) {
         for (const [date, cells] of Object.entries(byDate)) {
@@ -559,7 +559,7 @@ export function usePlanWork({ initialDate, canEdit }: UsePlanWorkArgs) {
         method: "DELETE",
       }),
     onMutate: (vars): CellRollback => {
-      const grid = qc.getQueryData<GridData>(currentGridKey as any);
+      const grid = qc.getQueryData<GridData>(currentGridKey);
       if (!grid) return null;
       for (const [uidStr, byDate] of Object.entries(grid.cells)) {
         for (const [date, cells] of Object.entries(byDate)) {
@@ -600,7 +600,7 @@ export function usePlanWork({ initialDate, canEdit }: UsePlanWorkArgs) {
   // PlanWork.tsx so they continue to compile unchanged; by the time a
   // `mutateAsync` promise rejects, the mutation's own `onError` has already
   // restored the patched cells, so there is nothing left to do here.
-   
+
   function rollbackMutation(_mutation: unknown, _userId: number) {
     /* no-op — see onMutate/onError above */
   }

src/admin/lib/queries/invoices.ts

@@ -38,6 +38,7 @@ export interface InvoiceItem {
   quantity: number;
   unit: string;
   unit_price: number;
+  discount?: number;
   vat_rate?: number;
   is_included_in_total: boolean;
   position?: number;
@@ -84,6 +85,7 @@ export interface InvoiceDetail {
   bank_account_id?: number | null;
   items?: InvoiceItem[];
   sections?: InvoiceSection[];
+  selected_custom_fields?: number[];
   subtotal: number;
   vat_amount: number;
   total: number;

src/admin/lib/queries/issued-orders.ts

@@ -60,6 +60,7 @@ export interface IssuedOrderDetail extends IssuedOrder {
   sections: IssuedOrderSection[];
   supplier: Record<string, unknown> | null;
   valid_transitions: string[];
+  selected_custom_fields: number[];
   /** Fresh edit lock held by ANOTHER user (same shape as offers), else null. */
   locked_by: {
     user_id: number;

src/admin/lib/queries/offers.ts

@@ -143,6 +143,7 @@ export interface OfferItemData {
   quantity: number;
   unit: string;
   unit_price: number;
+  discount?: number;
   is_included_in_total: boolean;
   position?: number;
 }
@@ -183,6 +184,7 @@ export interface OfferDetailData {
   locked_by: OfferLockInfo | null;
   /** Legal next statuses, computed server-side (same contract as issued orders). */
   valid_transitions: string[];
+  selected_custom_fields: number[];
 }
 
 export const offerDetailOptions = (id: string | undefined) =>

src/admin/pages/AttendanceHistory.tsx

@@ -210,7 +210,7 @@ export default function AttendanceHistory() {
   const { data, isPending } = useQuery(
     attendanceHistoryOptions({ month, userId: user?.id }),
   );
-  const records = data ?? [];
+  const records = useMemo(() => data ?? [], [data]);
 
   const computed = useMemo(() => {
     const [yearStr, monthStr] = month.split("-");

src/admin/pages/Dashboard.tsx

@@ -348,7 +348,9 @@ export default function Dashboard() {
             display: "grid",
             gridTemplateColumns: { xs: "1fr", lg: "1fr 1fr 1fr" },
             gap: 3,
-            alignItems: "start",
+            // stretch (not start) so the cards in a row share one height —
+            // even bottoms instead of ragged content-height cards.
+            alignItems: "stretch",
             mb: 3,
           }}
         >
@@ -360,10 +362,18 @@ export default function Dashboard() {
             <DashAttendanceToday attendance={dashData?.attendance ?? null} />
           )}
 
-          {/* Pravy sloupec: projekty + nabidky */}
-          <Box sx={{ display: "flex", flexDirection: "column", gap: 3 }}>
+          {/* Pravy sloupec: projekty + nabidky — both grow so the stacked
+              cards fill the column to match the neighbouring cards' height. */}
+          <Box
+            sx={{
+              display: "flex",
+              flexDirection: "column",
+              gap: 3,
+              height: "100%",
+            }}
+          >
             {dashData?.projects && (
-              <Card sx={{ display: "flex", flexDirection: "column" }}>
+              <Card sx={{ display: "flex", flexDirection: "column", flex: 1 }}>
                 <Box
                   sx={{
                     display: "flex",
@@ -421,7 +431,7 @@ export default function Dashboard() {
             )}
 
             {dashData?.offers && (
-              <Card sx={{ display: "flex", flexDirection: "column" }}>
+              <Card sx={{ display: "flex", flexDirection: "column", flex: 1 }}>
                 <Box
                   sx={{
                     display: "flex",
@@ -498,7 +508,7 @@ export default function Dashboard() {
             display: "grid",
             gridTemplateColumns: { xs: "1fr", lg: "1fr 1fr" },
             gap: 3,
-            alignItems: "start",
+            alignItems: "stretch",
           }}
         >
           <DashProfile

src/admin/pages/InvoiceDetail.tsx

@@ -27,6 +27,7 @@ import RichEditor from "../components/RichEditor";
 import SectionsEditor, {
   type DocumentSection,
 } from "../components/document/SectionsEditor";
+import CustomFieldsPrintPicker from "../components/document/CustomFieldsPrintPicker";
 import {
   DndContext,
   closestCenter,
@@ -185,9 +186,34 @@ interface InvoiceItem {
   quantity: string | number;
   unit: string;
   unit_price: string | number;
+  /** Per-item discount as a percentage (0–100). */
+  discount: string | number;
   vat_rate: number;
 }
 
+/**
+ * Discount input styling: centered, native number spinners hidden so a 3-digit
+ * value ("100") isn't clipped under the up/down arrows.
+ */
+const discountInputSx = {
+  "& input": { textAlign: "center" },
+  "& input[type=number]": { MozAppearance: "textfield" as const },
+  "& input::-webkit-outer-spin-button, & input::-webkit-inner-spin-button": {
+    WebkitAppearance: "none",
+    margin: 0,
+  },
+};
+
+/** NET of one invoice line after its per-item percentage discount. */
+const invoiceLineNet = (item: {
+  quantity: string | number;
+  unit_price: string | number;
+  discount?: string | number | null;
+}): number =>
+  (Number(item.quantity) || 0) *
+  (Number(item.unit_price) || 0) *
+  (1 - (Number(item.discount) || 0) / 100);
+
 interface InvoiceForm {
   customer_id: number | null;
   customer_name: string;
@@ -253,8 +279,7 @@ function SortableInvoiceRow({
     position: "relative" as const,
     zIndex: isDragging ? 10 : undefined,
   };
-  const lineTotal =
-    (Number(item.quantity) || 0) * (Number(item.unit_price) || 0);
+  const lineTotal = invoiceLineNet(item);
 
   if (isMobile) {
     return (
@@ -349,6 +374,14 @@ function SortableInvoiceRow({
             onChange={(e) => onUpdate(index, "unit_price", e.target.value)}
             slotProps={{ htmlInput: { step: "any" } }}
           />
+          <TextField
+            label="Sleva %"
+            type="number"
+            value={item.discount ?? ""}
+            onChange={(e) => onUpdate(index, "discount", e.target.value)}
+            slotProps={{ htmlInput: { min: "0", max: "100", step: "any" } }}
+            sx={discountInputSx}
+          />
           {apply_vat && (
             <Select
               label="DPH"
@@ -458,6 +491,15 @@ function SortableInvoiceRow({
           sx={{ "& input": { textAlign: "right" } }}
         />
       </TableCell>
+      <TableCell>
+        <TextField
+          type="number"
+          value={item.discount ?? ""}
+          onChange={(e) => onUpdate(index, "discount", e.target.value)}
+          slotProps={{ htmlInput: { min: "0", max: "100", step: "any" } }}
+          sx={discountInputSx}
+        />
+      </TableCell>
       {apply_vat ? (
         <TableCell>
           <Select
@@ -513,6 +555,7 @@ export default function InvoiceDetail() {
       quantity: 1,
       unit: "ks",
       unit_price: 0,
+      discount: 0,
       vat_rate: 21,
     }),
     [],
@@ -569,6 +612,9 @@ export default function InvoiceDetail() {
   // Rich-text CZ/EN "Obsah" sections (printed after the items on the PDF —
   // shared editor with offers/issued orders).
   const [sections, setSections] = useState<DocumentSection[]>([]);
+  const [selectedCustomFields, setSelectedCustomFields] = useState<number[]>(
+    [],
+  );
   const [items, setItems] = useState<InvoiceItem[]>(() => [
     {
       _key: "inv-1",
@@ -577,6 +623,7 @@ export default function InvoiceDetail() {
       quantity: 1,
       unit: "ks",
       unit_price: 0,
+      discount: 0,
       vat_rate: 21,
     },
   ]);
@@ -621,10 +668,17 @@ export default function InvoiceDetail() {
   const customers = customersQuery.data ?? [];
 
   const bankAccountsQuery = useQuery(bankAccountsOptions());
-  const bankAccounts = bankAccountsQuery.data ?? [];
+  const bankAccounts = useMemo(
+    () => bankAccountsQuery.data ?? [],
+    [bankAccountsQuery.data],
+  );
 
   const invoiceQuery = useQuery(invoiceDetailOptions(id));
   const invoice = invoiceQuery.data ?? null;
+  // Read-only view: show the Sleva column only when some line carries a discount.
+  const hasItemDiscount = (invoice?.items ?? []).some(
+    (it) => Number(it.discount) > 0,
+  );
 
   const nextNumberQuery = useQuery({
     queryKey: ["invoices", "next-number"],
@@ -656,8 +710,9 @@ export default function InvoiceDetail() {
   const [deleting, setDeleting] = useState(false);
 
   useEffect(() => {
+    const blobTimeouts = blobTimeoutsRef.current;
     return () => {
-      blobTimeoutsRef.current.forEach(clearTimeout);
+      blobTimeouts.forEach(clearTimeout);
     };
   }, []);
 
@@ -747,6 +802,7 @@ export default function InvoiceDetail() {
             quantity: Number(item.quantity) || 1,
             unit: item.unit || "",
             unit_price: Number(item.unit_price) || 0,
+            discount: Number(item.discount) || 0,
             // Per-line VAT: hydrate from the ITEM's own stored rate (a real DB
             // column returned by the detail endpoint) — falling back to the
             // invoice-level rate only when the line carries none. Hydrating
@@ -769,11 +825,15 @@ export default function InvoiceDetail() {
         : [];
     setSections(mappedSections);
 
+    const mappedCustomFields = inv.selected_custom_fields ?? [];
+    setSelectedCustomFields(mappedCustomFields);
+
     // Capture initial snapshot for dirty-checking
     initialSnapshotRef.current = JSON.stringify({
       form: formData,
       items: mappedItems,
       sections: mappedSections,
+      selectedCustomFields: mappedCustomFields,
     });
 
     setDataReady(true);
@@ -844,6 +904,7 @@ export default function InvoiceDetail() {
             quantity: Number(item.quantity) || 1,
             unit: (item.unit as string) || "",
             unit_price: Number(item.unit_price) || 0,
+            discount: Number(item.discount) || 0,
             vat_rate: vatRate,
           })),
         );
@@ -870,15 +931,21 @@ export default function InvoiceDetail() {
   // Edit mode: captured inside the sync effect from raw query data.
   // Create mode: captured on the first render after sync effects populate the form.
   if (dataReady && !initialSnapshotRef.current) {
-    initialSnapshotRef.current = JSON.stringify({ form, items, sections });
+    initialSnapshotRef.current = JSON.stringify({
+      form,
+      items,
+      sections,
+      selectedCustomFields,
+    });
   }
 
   const isDirty = useMemo(() => {
     if (!initialSnapshotRef.current) return false;
     return (
-      JSON.stringify({ form, items, sections }) !== initialSnapshotRef.current
+      JSON.stringify({ form, items, sections, selectedCustomFields }) !==
+      initialSnapshotRef.current
     );
-  }, [form, items, sections]);
+  }, [form, items, sections, selectedCustomFields]);
 
   useEffect(() => {
     if (!isDirty) return;
@@ -963,8 +1030,7 @@ export default function InvoiceDetail() {
     const vatByRate: Record<number, number> = {};
 
     items.forEach((item) => {
-      const lineTotal =
-        (Number(item.quantity) || 0) * (Number(item.unit_price) || 0);
+      const lineTotal = invoiceLineNet(item);
       subtotal += lineTotal;
 
       if (form.apply_vat) {
@@ -1034,6 +1100,7 @@ export default function InvoiceDetail() {
             // field never reaches the server as NaN (mirrors createTotals).
             quantity: Number(item.quantity) || 0,
             unit_price: Number(item.unit_price) || 0,
+            discount: Number(item.discount) || 0,
             position: i,
           })),
         sections: sections.map((s, i) => ({
@@ -1042,6 +1109,7 @@ export default function InvoiceDetail() {
           content: s.content,
           position: i,
         })),
+        selected_custom_fields: selectedCustomFields,
       };
       // Only set status when a target is given (create-as-draft / create-as-live
       // / finalize). Editing a live invoice sends no status — the backend keeps
@@ -1054,7 +1122,12 @@ export default function InvoiceDetail() {
 
       const data = await saveMutation.mutateAsync(payload);
       alert.success(isEdit ? "Faktura byla uložena" : "Faktura byla vytvořena");
-      initialSnapshotRef.current = JSON.stringify({ form, items, sections });
+      initialSnapshotRef.current = JSON.stringify({
+        form,
+        items,
+        sections,
+        selectedCustomFields,
+      });
       if (!isEdit) {
         navigate(`/invoices/${data.invoice_id}`);
       }
@@ -1357,9 +1430,7 @@ export default function InvoiceDetail() {
             isMobile ? (
               <Box sx={{ display: "flex", flexDirection: "column", gap: 1.5 }}>
                 {invoice.items.map((item, index) => {
-                  const lineSubtotal =
-                    (Number(item.quantity) || 0) *
-                    (Number(item.unit_price) || 0);
+                  const lineSubtotal = invoiceLineNet(item);
                   const lineVat = Number(invoice.apply_vat)
                     ? (lineSubtotal * (Number(item.vat_rate) || 0)) / 100
                     : 0;
@@ -1490,6 +1561,11 @@ export default function InvoiceDetail() {
                       <TableCell sx={{ width: "8rem" }} align="center">
                         Jedn. cena
                       </TableCell>
+                      {hasItemDiscount && (
+                        <TableCell sx={{ width: "4rem" }} align="center">
+                          Sleva %
+                        </TableCell>
+                      )}
                       <TableCell sx={{ width: "4rem" }} align="center">
                         DPH
                       </TableCell>
@@ -1500,9 +1576,7 @@ export default function InvoiceDetail() {
                   </TableHead>
                   <TableBody>
                     {invoice.items.map((item, index) => {
-                      const lineSubtotal =
-                        (Number(item.quantity) || 0) *
-                        (Number(item.unit_price) || 0);
+                      const lineSubtotal = invoiceLineNet(item);
                       const lineVat = Number(invoice.apply_vat)
                         ? (lineSubtotal * (Number(item.vat_rate) || 0)) / 100
                         : 0;
@@ -1551,6 +1625,13 @@ export default function InvoiceDetail() {
                           >
                             {formatCurrency(item.unit_price, invoice.currency)}
                           </TableCell>
+                          {hasItemDiscount && (
+                            <TableCell align="center">
+                              {Number(item.discount) > 0
+                                ? `${Number(item.discount)} %`
+                                : "—"}
+                            </TableCell>
+                          )}
                           <TableCell align="center">
                             {Number(invoice.apply_vat)
                               ? Number(item.vat_rate)
@@ -2148,6 +2229,15 @@ export default function InvoiceDetail() {
               ]}
             />
           </Field>
+
+          <Box sx={{ mt: 2 }}>
+            <CustomFieldsPrintPicker
+              fields={companySettings?.custom_fields ?? []}
+              selected={selectedCustomFields}
+              disabled={false}
+              onChange={setSelectedCustomFields}
+            />
+          </Box>
         </Card>
 
         {/* Items */}
@@ -2234,6 +2324,9 @@ export default function InvoiceDetail() {
                         <TableCell sx={{ width: "8rem" }} align="center">
                           Jedn. cena
                         </TableCell>
+                        <TableCell sx={{ width: "7rem" }} align="center">
+                          Sleva %
+                        </TableCell>
                         {form.apply_vat ? (
                           <TableCell sx={{ width: "5rem" }} align="center">
                             DPH

src/admin/pages/IssuedOrderDetail.tsx

@@ -23,6 +23,7 @@ import SectionsEditor, {
   type DocumentSection,
 } from "../components/document/SectionsEditor";
 import LockBanner from "../components/document/LockBanner";
+import CustomFieldsPrintPicker from "../components/document/CustomFieldsPrintPicker";
 import { useDocumentLock } from "../hooks/useDocumentLock";
 import { useUnsavedChangesGuard } from "../hooks/useUnsavedChangesGuard";
 import { useDocumentPdf } from "../hooks/useDocumentPdf";
@@ -137,6 +138,7 @@ interface IssuedOrderSavePayload {
   internal_notes: string;
   items: IssuedOrderItemPayload[];
   sections: IssuedOrderSectionPayload[];
+  selected_custom_fields: number[];
   status?: string;
 }
 
@@ -164,6 +166,9 @@ export default function IssuedOrderDetail() {
     emptyDocumentItem(),
   ]);
   const [sections, setSections] = useState<DocumentSection[]>([]);
+  const [selectedCustomFields, setSelectedCustomFields] = useState<number[]>(
+    [],
+  );
   const [errors, setErrors] = useState<Record<string, string>>({});
   const [saving, setSaving] = useState(false);
   // Which save action is in flight ("draft" | the live status | "save"), so
@@ -255,7 +260,7 @@ export default function IssuedOrderDetail() {
   const canExport = hasPermission("orders.view");
 
   const { isDirty, markClean } = useUnsavedChangesGuard(
-    { form, items, sections },
+    { form, items, sections, selectedCustomFields },
     !isEdit || dataReady,
   );
 
@@ -293,8 +298,12 @@ export default function IssuedOrderDetail() {
             quantity: numberOr(it.quantity, 1),
             unit: it.unit || "",
             unit_price: Number(it.unit_price) || 0,
+            // Issued orders have no Sleva column; keep the shared item shape happy.
+            discount: 0,
           }))
-        : [emptyDocumentItem()];
+        : // Issued orders may be issued by sections alone — a saved order with
+          // no items reopens with an empty list (not a blank starter row).
+          [];
     setItems(mappedItems);
 
     const mappedSections =
@@ -306,6 +315,7 @@ export default function IssuedOrderDetail() {
           }))
         : [];
     setSections(mappedSections);
+    setSelectedCustomFields(d.selected_custom_fields ?? []);
 
     setLockedBy(d.locked_by ?? null);
     // Acquire the edit lock when nobody holds it, the order is still
@@ -393,8 +403,18 @@ export default function IssuedOrderDetail() {
     const newErrors: Record<string, string> = {};
     if (!form.supplier_id) newErrors.supplier_id = "Vyberte dodavatele";
     if (!form.order_date) newErrors.order_date = "Zadejte datum";
-    if (items.length === 0 || items.every((i) => !i.description.trim())) {
-      newErrors.items = "Přidejte alespoň jednu položku";
+    // Items are optional (an order may be issued by sections alone), but a
+    // completely blank order must not be finalizable: require at least one
+    // item with a description OR one non-empty section (title or content).
+    const hasItem = items.some((i) => i.description.trim());
+    const hasSection = sections.some(
+      (s) =>
+        (s.title_cz || "").trim() ||
+        (s.title || "").trim() ||
+        (s.content || "").replace(/<[^>]*>/g, "").trim(),
+    );
+    if (!hasItem && !hasSection) {
+      newErrors.items = "Přidejte alespoň jednu položku nebo obsah";
     }
     setErrors(newErrors);
     if (Object.keys(newErrors).length > 0) return;
@@ -428,6 +448,7 @@ export default function IssuedOrderDetail() {
           content: s.content,
           position: i,
         })),
+        selected_custom_fields: selectedCustomFields,
       };
       // Only set status when a target is given (create-as-draft / create-as-live
       // / finalize). Editing a live order sends no status — the backend keeps
@@ -872,6 +893,15 @@ export default function IssuedOrderDetail() {
               placeholder="Objednáváme si u Vás: (ponechte prázdné pro výchozí)"
             />
           </Field>
+
+          <Box sx={{ mt: 2 }}>
+            <CustomFieldsPrintPicker
+              fields={companySettings?.custom_fields ?? []}
+              selected={selectedCustomFields}
+              disabled={!editable}
+              onChange={setSelectedCustomFields}
+            />
+          </Box>
         </Card>
 
         {/* Items */}
@@ -881,6 +911,7 @@ export default function IssuedOrderDetail() {
           currency={form.currency}
           readOnly={!editable}
           error={errors.items}
+          allowEmpty
         />
 
         {/* Rich-text PDF sections — the free-form PDF content lives here */}

src/admin/pages/OfferDetail.tsx

@@ -33,6 +33,7 @@ import SectionsEditor, {
   type DocumentSection,
 } from "../components/document/SectionsEditor";
 import LockBanner from "../components/document/LockBanner";
+import CustomFieldsPrintPicker from "../components/document/CustomFieldsPrintPicker";
 import { useDocumentLock } from "../hooks/useDocumentLock";
 import { useUnsavedChangesGuard } from "../hooks/useUnsavedChangesGuard";
 import { useDocumentPdf } from "../hooks/useDocumentPdf";
@@ -93,6 +94,7 @@ interface OfferItemPayload {
   quantity: number;
   unit: string;
   unit_price: number;
+  discount: number;
   is_included_in_total: boolean;
   position: number;
 }
@@ -113,6 +115,7 @@ interface OfferSavePayload {
   language: string;
   items: OfferItemPayload[];
   sections: OfferSectionPayload[];
+  selected_custom_fields: number[];
   status?: string;
 }
 
@@ -177,6 +180,9 @@ export default function OfferDetail() {
     emptyDocumentItem(),
   ]);
   const [sections, setSections] = useState<DocumentSection[]>([]);
+  const [selectedCustomFields, setSelectedCustomFields] = useState<number[]>(
+    [],
+  );
   const [orderInfo, setOrderInfo] = useState<OfferOrderInfo | null>(null);
   const [offerStatus, setOfferStatus] = useState<string>("");
   const [quotationNumber, setQuotationNumber] = useState("");
@@ -269,7 +275,7 @@ export default function OfferDetail() {
   const canDelete = isEdit && !orderInfo && !isInvalidated && !isLockedByOther;
 
   const { markClean } = useUnsavedChangesGuard(
-    { form, items, sections },
+    { form, items, sections, selectedCustomFields },
     !loading,
   );
 
@@ -303,6 +309,7 @@ export default function OfferDetail() {
             quantity: numberOr(it.quantity, 1),
             unit: it.unit || "",
             unit_price: Number(it.unit_price) || 0,
+            discount: Number(it.discount) || 0,
             is_included_in_total: it.is_included_in_total !== false,
           }))
         : [emptyDocumentItem()];
@@ -316,6 +323,7 @@ export default function OfferDetail() {
           }))
         : [];
     setSections(mappedSections);
+    setSelectedCustomFields(d.selected_custom_fields ?? []);
     markClean({ form: formData, items: mappedItems, sections: mappedSections });
     setOfferStatus(d.status || "");
     setOrderInfo(d.order ?? null);
@@ -433,6 +441,7 @@ export default function OfferDetail() {
           quantity: Number(item.quantity) || 0,
           unit: item.unit,
           unit_price: Number(item.unit_price) || 0,
+          discount: Number(item.discount) || 0,
           is_included_in_total: item.is_included_in_total !== false,
           position: i,
         })),
@@ -442,6 +451,7 @@ export default function OfferDetail() {
           content: s.content,
           position: i,
         })),
+        selected_custom_fields: selectedCustomFields,
       };
       // Only set status when a target is given (create-as-draft / create-as-live
       // / finalize). Editing a live offer sends no status — the backend keeps
@@ -926,6 +936,15 @@ export default function OfferDetail() {
               />
             </Field>
           </Box>
+
+          <Box sx={{ mt: 2 }}>
+            <CustomFieldsPrintPicker
+              fields={companySettings?.custom_fields ?? []}
+              selected={selectedCustomFields}
+              disabled={readOnly}
+              onChange={setSelectedCustomFields}
+            />
+          </Box>
         </Card>
 
         {/* Items (drag-and-drop, offers carry the "V ceně" column) */}
@@ -936,6 +955,7 @@ export default function OfferDetail() {
           readOnly={readOnly}
           error={errors.items}
           showIncludedInTotal
+          showDiscount
           itemDescriptionMaxLength={8000}
           templatesSlot={
             itemTemplates && itemTemplates.length > 0 ? (
@@ -957,6 +977,7 @@ export default function OfferDetail() {
                         quantity: 1,
                         unit: "ks",
                         unit_price: template.default_price || 0,
+                        discount: 0,
                         is_included_in_total: true,
                       },
                     ]);

src/admin/pages/OrderDetail.tsx

@@ -121,8 +121,9 @@ export default function OrderDetail() {
   }, [orderQuery.error]); // eslint-disable-line react-hooks/exhaustive-deps
 
   useEffect(() => {
+    const blobTimeouts = blobTimeoutsRef.current;
     return () => {
-      blobTimeoutsRef.current.forEach(clearTimeout);
+      blobTimeouts.forEach(clearTimeout);
     };
   }, []);
 

src/admin/pages/PlanWork.tsx

@@ -10,6 +10,10 @@ import {
   getCell,
   getCells,
   type ModalMode as HookModalMode,
+  type PlanEntryBody,
+  type PlanEntryPatchBody,
+  type PlanOverrideBody,
+  type PlanOverridePatchBody,
 } from "../hooks/usePlanWork";
 import type { PlanCellModalMode } from "../components/PlanCellModal";
 import PlanGrid from "../components/PlanGrid";
@@ -182,7 +186,13 @@ export default function PlanWork() {
     if (bulkForm.user_ids.length === 0) return;
     setBulkSubmitting(true);
     try {
-      const data: any = await bulkCreate.mutateAsync({
+      // Counts can arrive either at the envelope root or nested under .data.
+      type BulkSummary = {
+        created_days?: number;
+        skipped_days?: number;
+        users?: number;
+      };
+      const data = (await bulkCreate.mutateAsync({
         user_ids: bulkForm.user_ids.map(Number),
         date_from: bulkForm.date_from,
         date_to: bulkForm.is_range ? bulkForm.date_to : bulkForm.date_from,
@@ -190,12 +200,12 @@ export default function PlanWork() {
         project_id: bulkForm.project_id ? Number(bulkForm.project_id) : null,
         category: bulkForm.category,
         note: bulkForm.note,
-      });
+      })) as BulkSummary & { data?: BulkSummary };
       // apiCall returns the full envelope { success, data, message };
       // the summary counts are under .data
-      const summary = data?.data ?? data;
+      const summary: BulkSummary = data?.data ?? data;
       const skipped =
-        summary?.skipped_days > 0
+        (summary?.skipped_days ?? 0) > 0
           ? ` ${summary.skipped_days} dní přeskočeno (limit 3 na den).`
           : "";
       alert.success(
@@ -392,7 +402,7 @@ export default function PlanWork() {
   // optimistic cache patch the hook already applied.
 
   const saveEntry = useCallback(
-    async (body: any) => {
+    async (body: PlanEntryBody) => {
       try {
         await createEntry.mutateAsync(body);
         // Pulse the first day of the new entry — for multi-day entries
@@ -409,7 +419,7 @@ export default function PlanWork() {
   );
 
   const updateEntryFn = useCallback(
-    async (id: number, body: any) => {
+    async (id: number, body: PlanEntryPatchBody) => {
       // Find the user for this entry so we know which cell to pulse /
       // which cache to roll back. The hook's optimistic patch already
       // discovered this; we read it from the current grid.
@@ -473,7 +483,7 @@ export default function PlanWork() {
   );
 
   const saveOverride = useCallback(
-    async (body: any) => {
+    async (body: PlanOverrideBody) => {
       try {
         await createOverride.mutateAsync(body);
         firePulse(body.user_id, body.shift_date);
@@ -488,7 +498,7 @@ export default function PlanWork() {
   );
 
   const updateOverrideFn = useCallback(
-    async (id: number, body: any) => {
+    async (id: number, body: PlanOverridePatchBody) => {
       // Find the user/date for the pulse + rollback.
       let userId: number | null = null;
       let date: string | null = null;

src/admin/pages/ReceivedInvoices.tsx

@@ -362,8 +362,9 @@ export default function ReceivedInvoices({
   const fileInputRef = useRef<HTMLInputElement>(null);
 
   useEffect(() => {
+    const blobTimeouts = blobTimeoutsRef.current;
     return () => {
-      blobTimeoutsRef.current.forEach(clearTimeout);
+      blobTimeouts.forEach(clearTimeout);
     };
   }, []);
 
@@ -1149,11 +1150,9 @@ export default function ReceivedInvoices({
             ? "Zavřít"
             : "Uložit"
         }
-        cancelText={
-          editInvoice && editInvoice._originalStatus === "paid"
-            ? "Zavřít"
-            : "Zrušit"
-        }
+        // Read-only (paid) detail has only a close action — a single "Zavřít"
+        // button, not a redundant cancel button beside it.
+        hideCancel={editInvoice?._originalStatus === "paid"}
         loading={saving}
       >
         {editInvoice &&

src/admin/pages/Settings.tsx

@@ -715,7 +715,25 @@ export default function Settings() {
         </Box>
       );
     }
-    const si = systemInfo as Record<string, any>;
+    type NasInfo = { configured?: boolean; path?: string | null };
+    type SystemInfo = {
+      app_version?: string;
+      node_version?: string;
+      platform?: string;
+      uptime?: string;
+      environment?: string;
+      timezone?: string;
+      memory?: {
+        rss?: string;
+        heap_used?: string;
+        heap_total?: string;
+        system_free?: string;
+        system_total?: string;
+      };
+      database?: { status?: string; migrations_applied?: number | string };
+      nas?: Record<string, NasInfo | undefined>;
+    };
+    const si = systemInfo as SystemInfo;
     const Row = ({
       label,
       children,
@@ -800,7 +818,7 @@ export default function Settings() {
             ["Faktury", si.nas?.invoices],
             ["Objednávky", si.nas?.orders],
             ["Nabídky", si.nas?.offers],
-          ] as [string, Record<string, any>][]
+          ] as [string, NasInfo | undefined][]
         ).map(([label, info]) => (
           <Row key={label} label={label}>
             <Box sx={{ display: "flex", alignItems: "center", gap: 1 }}>

src/admin/pages/WarehouseIssueForm.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, useRef, useId } from "react";
+import { useState, useEffect, useRef, useId, useCallback } from "react";
 import {
   useParams,
   useNavigate,
@@ -174,7 +174,10 @@ export default function WarehouseIssueForm() {
 
   const baseId = useId();
   const counterRef = useRef(0);
-  const nextKey = () => `${baseId}-item-${counterRef.current++}`;
+  const nextKey = useCallback(
+    () => `${baseId}-item-${counterRef.current++}`,
+    [baseId],
+  );
 
   // Pre-fill data from reservation ("Create výdej" button)
   const prefill = location.state as {
@@ -262,7 +265,7 @@ export default function WarehouseIssueForm() {
       }
       formInitialized.current = true;
     }
-  }, [isEdit, issue]);
+  }, [isEdit, issue, nextKey]);
 
   const saveMutation = useApiMutation<
     ReturnType<typeof buildPayload>,

src/admin/pages/WarehouseReceiptForm.tsx

@@ -126,7 +126,10 @@ export default function WarehouseReceiptForm() {
 
   const baseId = useId();
   const counterRef = useRef(0);
-  const nextKey = () => `${baseId}-item-${counterRef.current++}`;
+  const nextKey = useCallback(
+    () => `${baseId}-item-${counterRef.current++}`,
+    [baseId],
+  );
 
   const [form, setForm] = useState<ReceiptForm>({
     supplier_id: null,
@@ -198,7 +201,7 @@ export default function WarehouseReceiptForm() {
       }
       formInitialized.current = true;
     }
-  }, [isEdit, receipt]);
+  }, [isEdit, receipt, nextKey]);
 
   const saveMutation = useApiMutation<
     ReturnType<typeof buildPayload>,

src/admin/theme.test.ts

@@ -1,6 +1,9 @@
 import { describe, it, expect } from "vitest";
 import { theme } from "./theme";
 
+/** Loose shape for poking into MUI styleOverrides objects in assertions. */
+type StyleObj = Record<string, unknown>;
+
 /** Minimal palette shape used by the colorSchemes assertions below. */
 interface SchemesPalette {
   primary: { main: string };
@@ -44,18 +47,20 @@ describe("MUI theme", () => {
   });
 
   it("makes buttons pill-shaped and cards 16px by default", () => {
-    const btn = theme.components?.MuiButton?.styleOverrides?.root as any;
-    expect(btn?.borderRadius).toBe(999);
-    const card = theme.components?.MuiCard?.styleOverrides?.root as any;
-    expect(card?.borderRadius).toBe(16);
+    const btn = theme.components?.MuiButton?.styleOverrides?.root as StyleObj;
+    expect(btn.borderRadius).toBe(999);
+    const card = theme.components?.MuiCard?.styleOverrides?.root as StyleObj;
+    expect(card.borderRadius).toBe(16);
   });
 
   it("adds 200-300ms interaction motion (press + focus ring)", () => {
-    const btn = theme.components?.MuiButton?.styleOverrides?.root as any;
-    expect(btn?.transition).toContain("transform");
-    expect(btn?.["&:active"]?.transform).toBe("scale(0.97)");
+    const btn = theme.components?.MuiButton?.styleOverrides?.root as StyleObj;
+    expect(btn.transition).toContain("transform");
+    const active = btn["&:active"] as StyleObj;
+    expect(active.transform).toBe("scale(0.97)");
     const input = theme.components?.MuiOutlinedInput?.styleOverrides
-      ?.root as any;
-    expect(input?.["&.Mui-focused"]?.boxShadow).toContain("rgba");
+      ?.root as StyleObj;
+    const focused = input["&.Mui-focused"] as StyleObj;
+    expect(focused.boxShadow).toContain("rgba");
   });
 });

src/admin/utils/api.ts

@@ -1,3 +1,5 @@
+import { reportServerVersion } from "./appVersion";
+
 class ApiState {
   showSessionExpiredAlert = false;
   showLogoutAlert = false;
@@ -120,6 +122,8 @@ export const apiFetch = async (
     headers,
     credentials: "include",
   });
+  // Detect a new deploy: compare the server's build version to ours.
+  reportServerVersion(response.headers.get("X-App-Version"));
 
   if (response.status === 401 && state.refreshFn) {
     // If the caller already unmounted (TanStack Query aborted the request),

src/admin/utils/appVersion.ts

@@ -0,0 +1,48 @@
+/**
+ * New-deploy detection for the SPA.
+ *
+ * The server stamps every response with `X-App-Version`. `apiFetch` feeds that
+ * header here via `reportServerVersion`. When it differs from the version baked
+ * into THIS bundle at build time (`BUILD_VERSION`), a deploy has happened — we
+ * latch it and notify subscribers (the refresh banner). We never force a
+ * reload; the user picks the moment (they may be mid-form).
+ */
+
+// Injected by Vite `define` at build time; falls back to "dev" in tests / when
+// running unbuilt. `typeof` guard avoids a ReferenceError when undefined.
+declare const __APP_VERSION__: string;
+export const BUILD_VERSION: string =
+  typeof __APP_VERSION__ !== "undefined" ? __APP_VERSION__ : "dev";
+
+let newVersion: string | null = null;
+const listeners = new Set<() => void>();
+
+/**
+ * Compare a server-reported version against this bundle's build version. Latches
+ * the first genuine mismatch and notifies subscribers exactly once.
+ */
+export function reportServerVersion(
+  serverVersion: string | null | undefined,
+): void {
+  if (newVersion) return; // already latched — banner is up
+  if (!serverVersion || serverVersion === BUILD_VERSION) return;
+  newVersion = serverVersion;
+  for (const l of listeners) l();
+}
+
+export function subscribeNewVersion(listener: () => void): () => void {
+  listeners.add(listener);
+  return () => {
+    listeners.delete(listener);
+  };
+}
+
+export function getNewVersion(): string | null {
+  return newVersion;
+}
+
+/** Test-only: reset the module singleton between cases. */
+export function __resetVersionStateForTest(): void {
+  newVersion = null;
+  listeners.clear();
+}

src/admin/utils/lazyWithReload.ts

@@ -0,0 +1,35 @@
+import { lazy } from "react";
+import type { ComponentType } from "react";
+
+const RELOAD_KEY = "spa-chunk-reloaded";
+
+/**
+ * React.lazy that survives a deploy. If a page's dynamic import fails because
+ * its hashed chunk was removed by a newer build, reload once to fetch the fresh
+ * bundle (guarded by sessionStorage so a genuine load failure can't loop). On a
+ * successful load the guard is cleared so the next deploy can recover too.
+ *
+ * The generic mirrors React.lazy's own `ComponentType<any>` constraint — there
+ * is no non-any equivalent that satisfies it, so the `any` is unavoidable here.
+ */
+export function lazyWithReload<
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  T extends ComponentType<any>,
+>(factory: () => Promise<{ default: T }>) {
+  return lazy(() =>
+    factory()
+      .then((mod) => {
+        sessionStorage.removeItem(RELOAD_KEY);
+        return mod;
+      })
+      .catch((err: unknown) => {
+        if (!sessionStorage.getItem(RELOAD_KEY)) {
+          sessionStorage.setItem(RELOAD_KEY, "1");
+          window.location.reload();
+          // Never resolves — the reload replaces the document.
+          return new Promise<{ default: T }>(() => {});
+        }
+        throw err;
+      }),
+  );
+}

src/middleware/version.ts

@@ -0,0 +1,33 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import type { FastifyInstance } from "fastify";
+
+/**
+ * The build version (from package.json), read once. A static `import` of the
+ * root package.json would pull a file outside `src` into the program and expand
+ * tsc's rootDir, so resolve it at runtime relative to the compiled file.
+ */
+export function readAppVersion(): string {
+  try {
+    const pkg = JSON.parse(
+      readFileSync(join(__dirname, "../../package.json"), "utf8"),
+    ) as { version?: string };
+    return pkg.version ?? "0.0.0";
+  } catch {
+    return "0.0.0";
+  }
+}
+
+/**
+ * Stamp every response with `X-App-Version` so the SPA can detect a new deploy
+ * (the client compares it to the version baked into its own bundle and prompts
+ * a refresh on mismatch).
+ */
+export function registerVersionHeader(
+  app: FastifyInstance,
+  version: string = readAppVersion(),
+): void {
+  app.addHook("onSend", async (_request, reply) => {
+    reply.header("X-App-Version", version);
+  });
+}

src/routes/admin/company-settings.ts

@@ -13,6 +13,8 @@ import { parseBody } from "../../schemas/common";
 import { UpdateCompanySettingsSchema } from "../../schemas/settings.schema";
 import { invalidateSettingsCache } from "../../services/system-settings";
 import os from "os";
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
 import { config } from "../../config/env";
 import { NasFileManager } from "../../services/nas-file-manager";
 import {
@@ -21,6 +23,15 @@ import {
 } from "../../services/nas-financials-manager";
 import { nasOffersManager } from "../../services/nas-offers-manager";
 
+// Read once at load. A static `import` of the root package.json would pull a
+// file outside `src` into the program, expanding tsc's rootDir and shifting the
+// whole dist/ layout — so resolve it at runtime relative to the compiled file.
+const APP_VERSION = (
+  JSON.parse(
+    readFileSync(join(__dirname, "../../../package.json"), "utf8"),
+  ) as { version: string }
+).version;
+
 /** Encode custom_fields + supplier_field_order into a single JSON blob (matching PHP format) */
 function encodeCustomFields(
   fields: unknown,
@@ -325,8 +336,6 @@ export default async function companySettingsRoutes(
       settings.custom_fields as string | null,
     );
 
-    const pkg = require("../../../package.json") as { version: string };
-
     let available_vat_rates: number[] = [0, 10, 12, 15, 21];
     try {
       const raw = settings.available_vat_rates as string | null;
@@ -359,7 +368,7 @@ export default async function companySettingsRoutes(
       available_currencies,
       has_logo,
       has_logo_dark,
-      app_version: pkg.version,
+      app_version: APP_VERSION,
     });
   });
 
@@ -368,7 +377,6 @@ export default async function companySettingsRoutes(
     "/system-info",
     { preHandler: requirePermission("settings.system") },
     async (request, reply) => {
-      const pkg = require("../../../package.json") as { version: string };
       const uptimeSec = process.uptime();
       const days = Math.floor(uptimeSec / 86400);
       const hours = Math.floor((uptimeSec % 86400) / 3600);
@@ -401,7 +409,7 @@ export default async function companySettingsRoutes(
       const projectNas = new NasFileManager();
 
       return success(reply, {
-        app_version: pkg.version,
+        app_version: APP_VERSION,
         node_version: process.version,
         platform: `${os.type()} ${os.release()}`,
         uptime: uptimeStr,

src/routes/admin/invoices-pdf.ts

@@ -7,6 +7,8 @@ import { htmlToPdf } from "../../utils/html-to-pdf";
 import { getRate } from "../../services/exchange-rates";
 import { localDateStr } from "../../utils/date";
 import { parseId, success } from "../../utils/response";
+import { lineNet } from "../../utils/money";
+import { parseSelectedCustomFields } from "../../utils/custom-fields";
 import {
   formatDate,
   formatNum,
@@ -33,6 +35,7 @@ function buildAddressLines(
   entity: Record<string, unknown> | null,
   isSupplier: boolean,
   tObj: Record<string, string>,
+  selectedCustomFields?: number[],
 ): AddressResult {
   if (!entity) return { name: "", lines: [] };
 
@@ -88,7 +91,9 @@ function buildAddressLines(
     fieldMap.company_id = `${tObj.ico}${entity.company_id}`;
   if (entity.vat_id) fieldMap.vat_id = `${tObj.dic}${entity.vat_id}`;
 
+  const filterCustom = Array.isArray(selectedCustomFields);
   cfData.forEach((cf, i) => {
+    if (filterCustom && !selectedCustomFields!.includes(i)) return;
     const cfName = (cf.name || "").trim();
     const cfValue = (cf.value || "").trim();
     const showLabel = cf.showLabel !== false;
@@ -161,6 +166,7 @@ const translations: Record<string, Record<string, string>> = {
     col_desc: "Popis",
     col_qty: "Množství",
     col_unit_price: "Jedn. cena",
+    col_discount: "Sleva",
     col_price: "Cena",
     col_vat_pct: "%DPH",
     col_vat: "DPH",
@@ -208,6 +214,7 @@ const translations: Record<string, Record<string, string>> = {
     col_desc: "Description",
     col_qty: "Quantity",
     col_unit_price: "Unit price",
+    col_discount: "Discount",
     col_price: "Price",
     col_vat_pct: "VAT%",
     col_vat: "VAT",
@@ -312,6 +319,8 @@ export default async function invoicesPdfRoutes(
           where: { invoice_id: id },
           orderBy: [{ position: "asc" }, { id: "asc" }],
         });
+        // Sleva column is rendered only when at least one item has a discount.
+        const hasDiscount = items.some((it) => Number(it.discount) > 0);
 
         let customer: Record<string, unknown> | null = null;
         if (invoice.customer_id) {
@@ -362,7 +371,11 @@ export default async function invoicesPdfRoutes(
         let subtotal = 0;
 
         for (const item of items) {
-          const lineSubtotal = Number(item.quantity) * Number(item.unit_price);
+          const lineSubtotal = lineNet(
+            Number(item.quantity),
+            Number(item.unit_price),
+            Number(item.discount),
+          );
           subtotal += lineSubtotal;
           const rate = Number(item.vat_rate);
           const key = String(rate);
@@ -445,7 +458,15 @@ export default async function invoicesPdfRoutes(
           }
         }
 
-        const supp = buildAddressLines(settings, true, t);
+        const supp = buildAddressLines(
+          settings,
+          true,
+          t,
+          parseSelectedCustomFields(
+            (invoice as { selected_custom_fields?: unknown })
+              .selected_custom_fields,
+          ),
+        );
         const cust = buildAddressLines(customer, false, t);
 
         const suppLinesHtml = supp.lines
@@ -489,11 +510,16 @@ export default async function invoicesPdfRoutes(
           .map((item, i) => {
             const qty = Number(item.quantity);
             const unitPrice = Number(item.unit_price);
-            const lineSubtotal = qty * unitPrice;
+            const disc = Number(item.discount) || 0;
+            const lineSubtotal = lineNet(qty, unitPrice, disc);
             const vatRate = Number(item.vat_rate);
             const lineVat = applyVat ? (lineSubtotal * vatRate) / 100 : 0;
             const lineTotal = lineSubtotal + lineVat;
             const qtyDecimals = Math.floor(qty) === qty ? 0 : 2;
+            const discDecimals = Math.floor(disc) === disc ? 0 : 2;
+            const discCell = hasDiscount
+              ? `<td class="center">${disc > 0 ? `${formatNum(disc, discDecimals)}&nbsp;%` : "—"}</td>`
+              : "";
             const subDesc = item.item_description || "";
 
             return `<tr>
@@ -501,6 +527,7 @@ export default async function invoicesPdfRoutes(
             <td class="desc">${escapeHtml(item.description)}${subDesc ? `<div class="item-subdesc">${escapeHtml(subDesc)}</div>` : ""}</td>
             <td class="center">${formatNum(qty, qtyDecimals)}${item.unit ? ` / ${escapeHtml(item.unit)}` : ""}</td>
             <td class="right">${formatNum(unitPrice)}</td>
+            ${discCell}
             <td class="right">${formatNum(lineSubtotal)}</td>
             <td class="center">${applyVat ? Math.floor(vatRate) : 0}%</td>
             <td class="right">${formatNum(lineVat)}</td>
@@ -1052,9 +1079,10 @@ ${indentCSS}
     <thead>
       <tr>
         <th class="center" style="width:3%">${escapeHtml(t.col_no)}</th>
-        <th style="width:36%">${escapeHtml(t.col_desc)}</th>
+        <th style="width:${hasDiscount ? 29 : 36}%">${escapeHtml(t.col_desc)}</th>
         <th class="center" style="width:10%">${escapeHtml(t.col_qty)}</th>
         <th class="right" style="width:10%">${escapeHtml(t.col_unit_price)}</th>
+        ${hasDiscount ? `<th class="center" style="width:7%">${escapeHtml(t.col_discount)}</th>` : ""}
         <th class="right" style="width:10%">${escapeHtml(t.col_price)}</th>
         <th class="center" style="width:5%">${escapeHtml(t.col_vat_pct)}</th>
         <th class="right" style="width:10%">${escapeHtml(t.col_vat)}</th>

src/routes/admin/issued-orders-pdf.ts

@@ -4,6 +4,7 @@ import { requirePermission } from "../../middleware/auth";
 import { parseId, success } from "../../utils/response";
 import { htmlToPdf } from "../../utils/html-to-pdf";
 import { nasOrdersManager } from "../../services/nas-financials-manager";
+import { parseSelectedCustomFields } from "../../utils/custom-fields";
 import {
   formatDate,
   formatNum,
@@ -31,6 +32,7 @@ function buildAddressLines(
   entity: Record<string, unknown> | null,
   isCompany: boolean,
   tObj: Record<string, string>,
+  selectedCustomFields?: number[],
 ): AddressResult {
   if (!entity) return { name: "", lines: [] };
 
@@ -86,7 +88,9 @@ function buildAddressLines(
     fieldMap.company_id = `${tObj.ico}${entity.company_id}`;
   if (entity.vat_id) fieldMap.vat_id = `${tObj.dic}${entity.vat_id}`;
 
+  const filterCustom = Array.isArray(selectedCustomFields);
   cfData.forEach((cf, i) => {
+    if (filterCustom && !selectedCustomFields!.includes(i)) return;
     const cfName = (cf.name || "").trim();
     const cfValue = (cf.value || "").trim();
     const showLabel = cf.showLabel !== false;
@@ -313,7 +317,14 @@ export function renderIssuedOrderHtml(
 
   // PO direction: our company (settings) = Odběratel (buyer);
   // the sklad_suppliers record = Dodavatel (supplier).
-  const buyer = buildAddressLines(settings, true, t); // company → Odběratel
+  const buyer = buildAddressLines(
+    settings,
+    true,
+    t,
+    parseSelectedCustomFields(
+      (order as { selected_custom_fields?: unknown }).selected_custom_fields,
+    ),
+  ); // company → Odběratel
   const supplierAddr = buildSupplierLines(supplier, t); // supplier → Dodavatel
 
   const buyerLinesHtml = buyer.lines
@@ -741,8 +752,11 @@ ${indentCSS}
     </tr>
   </table>
 
-  <!-- Polozky -->
-  <div class="billing-label">${escapeHtml(order.order_text || t.billing)}</div>
+  <!-- Polozky — an order may be issued by sections alone; with no items the
+       heading, items table and total row are omitted entirely. -->
+  ${
+    items.length > 0
+      ? `<div class="billing-label">${escapeHtml(order.order_text || t.billing)}</div>
   <table class="items">
     <thead>
       <tr>
@@ -768,7 +782,9 @@ ${indentCSS}
         <span class="value">${formatCurrency(total, currency)}</span>
       </div>
     </div>
-  </div>
+  </div>`
+      : ""
+  }
 
   ${scopeHtml}
 

src/routes/admin/issued-orders.ts

@@ -366,6 +366,8 @@ export default async function issuedOrdersRoutes(fastify: FastifyInstance) {
           return error(reply, "Dodavatel nenalezen", 400);
         if (order.error === "po_number_taken")
           return error(reply, "Číslo objednávky je již použito", 409);
+        if (order.error === "empty_document")
+          return error(reply, "Přidejte alespoň jednu položku nebo obsah", 400);
         return error(reply, "Neznámá chyba", 500);
       }
       await logAudit({
@@ -408,6 +410,8 @@ export default async function issuedOrdersRoutes(fastify: FastifyInstance) {
             `Neplatný přechod stavu z "${result.currentStatus}" na "${result.newStatus}"`,
             400,
           );
+        if (result.error === "empty_document")
+          return error(reply, "Přidejte alespoň jednu položku nebo obsah", 400);
         return error(reply, "Neznámá chyba", 500);
       }
       await logAudit({

src/routes/admin/offers-pdf.ts

@@ -5,6 +5,8 @@ import { requirePermission } from "../../middleware/auth";
 import { nasOffersManager } from "../../services/nas-offers-manager";
 import { htmlToPdf } from "../../utils/html-to-pdf";
 import { parseId, success } from "../../utils/response";
+import { lineNet } from "../../utils/money";
+import { parseSelectedCustomFields } from "../../utils/custom-fields";
 import {
   formatDate,
   formatNum,
@@ -28,6 +30,7 @@ function buildAddressLines(
   entity: Record<string, unknown> | null,
   isSupplier: boolean,
   t: (key: string) => string,
+  selectedCustomFields?: number[],
 ): AddressResult {
   if (!entity) return { name: "", lines: [] };
 
@@ -84,7 +87,9 @@ function buildAddressLines(
     fieldMap.company_id = `${t("ico")}: ${entity.company_id}`;
   if (entity.vat_id) fieldMap.vat_id = `${t("dic")}: ${entity.vat_id}`;
 
+  const filterCustom = Array.isArray(selectedCustomFields);
   cfData.forEach((cf, i) => {
+    if (filterCustom && !selectedCustomFields!.includes(i)) return;
     const cfName = (cf.name || "").trim();
     const cfValue = (cf.value || "").trim();
     const showLabel = cf.showLabel !== false;
@@ -123,6 +128,7 @@ const TRANSLATIONS: Record<string, Record<string, string>> = {
   description: { EN: "Description", CZ: "Popis" },
   qty: { EN: "Qty", CZ: "Mn." },
   unit_price: { EN: "Unit Price", CZ: "Jedn. cena" },
+  discount: { EN: "Discount", CZ: "Sleva" },
   included: { EN: "Included", CZ: "Zahrnuto" },
   total: { EN: "Total", CZ: "Celkem" },
   total_no_vat: { EN: "Total excl. VAT", CZ: "Celkem bez DPH" },
@@ -170,9 +176,15 @@ export function renderOfferHtml(
   let total = 0;
   for (const item of items) {
     if (item.is_included_in_total !== false) {
-      total += (Number(item.quantity) || 0) * (Number(item.unit_price) || 0);
+      total += lineNet(
+        Number(item.quantity) || 0,
+        Number(item.unit_price) || 0,
+        Number(item.discount),
+      );
     }
   }
+  // Sleva column is rendered only when at least one item carries a discount.
+  const hasDiscount = items.some((it) => Number(it.discount) > 0);
   // Visibility uses the SAME per-language title rule as the render loop plus
   // a tag-stripped content check (an empty-Quill "<p><br></p>" doesn't count)
   // — otherwise a section with only the other language's title would count as
@@ -202,6 +214,10 @@ export function renderOfferHtml(
     settings as unknown as Record<string, unknown>,
     true,
     t,
+    parseSelectedCustomFields(
+      (quotation as { selected_custom_fields?: unknown })
+        .selected_custom_fields,
+    ),
   );
 
   const custLinesHtml = cust.lines
@@ -217,10 +233,15 @@ export function renderOfferHtml(
   let itemsHtml = "";
   items.forEach((item, i) => {
     const qty = Number(item.quantity) || 0;
-    const lineTotal = qty * (Number(item.unit_price) || 0);
+    const disc = Number(item.discount) || 0;
+    const lineTotal = lineNet(qty, Number(item.unit_price) || 0, disc);
     // Integers render without decimals; fractional quantities keep 2 decimals
     // (the old toFixed(0) ROUNDED 1.5 → 2 on the printed document).
     const qtyDecimals = Math.floor(qty) === qty ? 0 : 2;
+    const discDecimals = Math.floor(disc) === disc ? 0 : 2;
+    const discCell = hasDiscount
+      ? `<td class="center">${disc > 0 ? `${formatNum(disc, discDecimals)}&nbsp;%` : "—"}</td>`
+      : "";
     const subDesc = item.item_description || "";
     const evenClass = i % 2 === 1 ? ' class="even"' : "";
     itemsHtml += `<tr${evenClass}>
@@ -228,6 +249,7 @@ export function renderOfferHtml(
             <td class="desc">${escapeHtml(item.description)}${subDesc ? `<div class="item-subdesc">${escapeHtml(subDesc)}</div>` : ""}</td>
             <td class="center">${formatNum(qty, qtyDecimals)}${(item.unit || "").trim() ? ` / ${escapeHtml((item.unit || "").trim())}` : ""}</td>
             <td class="right">${formatCurrency(Number(item.unit_price) || 0, currency)}</td>
+            ${discCell}
             <td class="right total-cell">${formatCurrency(lineTotal, currency)}</td>
           </tr>`;
   });
@@ -621,10 +643,11 @@ ${indentCSS}
           <thead>
             <tr>
               <th class="center" style="width:5%">${escapeHtml(t("no"))}</th>
-              <th style="width:44%">${escapeHtml(t("description"))}</th>
-              <th class="center" style="width:13%">${escapeHtml(t("qty"))}</th>
-              <th class="right" style="width:18%">${escapeHtml(t("unit_price"))}</th>
-              <th class="right" style="width:20%">${escapeHtml(t("total"))}</th>
+              <th style="width:${hasDiscount ? 36 : 44}%">${escapeHtml(t("description"))}</th>
+              <th class="center" style="width:12%">${escapeHtml(t("qty"))}</th>
+              <th class="right" style="width:16%">${escapeHtml(t("unit_price"))}</th>
+              ${hasDiscount ? `<th class="center" style="width:9%">${escapeHtml(t("discount"))}</th>` : ""}
+              <th class="right" style="width:18%">${escapeHtml(t("total"))}</th>
             </tr>
           </thead>
           <tbody>

src/routes/admin/plan.ts

@@ -194,7 +194,7 @@ export default async function planRoutes(app: FastifyInstance) {
     "/categories/:id",
     { preHandler: requirePermission("attendance.manage") },
     async (request: FastifyRequest, reply: FastifyReply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId((request.params as { id: string }).id, reply);
       if (id === null) return;
       const body = parseBody(UpdatePlanCategorySchema, request.body);
       if ("error" in body) return error(reply, body.error, 400);
@@ -218,7 +218,7 @@ export default async function planRoutes(app: FastifyInstance) {
     "/categories/:id",
     { preHandler: requirePermission("attendance.manage") },
     async (request: FastifyRequest, reply: FastifyReply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId((request.params as { id: string }).id, reply);
       if (id === null) return;
       const result = await deletePlanCategory(id);
       if ("error" in result) return error(reply, result.error, result.status);
@@ -289,7 +289,7 @@ export default async function planRoutes(app: FastifyInstance) {
     "/entries/:id",
     { preHandler: requirePermission("attendance.manage") },
     async (request: FastifyRequest, reply: FastifyReply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId((request.params as { id: string }).id, reply);
       if (id === null) return;
       const body = parseBody(UpdatePlanEntrySchema, request.body);
       if ("error" in body) return error(reply, body.error, 400);
@@ -321,7 +321,7 @@ export default async function planRoutes(app: FastifyInstance) {
     "/entries/:id",
     { preHandler: requirePermission("attendance.manage") },
     async (request: FastifyRequest, reply: FastifyReply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId((request.params as { id: string }).id, reply);
       if (id === null) return;
       const force = forceFromQuery(request.query);
       const result = await deleteEntry(id, request.authData!.userId, force);
@@ -373,7 +373,7 @@ export default async function planRoutes(app: FastifyInstance) {
     "/overrides/:id",
     { preHandler: requirePermission("attendance.manage") },
     async (request: FastifyRequest, reply: FastifyReply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId((request.params as { id: string }).id, reply);
       if (id === null) return;
       const body = parseBody(UpdatePlanOverrideSchema, request.body);
       if ("error" in body) return error(reply, body.error, 400);
@@ -405,7 +405,7 @@ export default async function planRoutes(app: FastifyInstance) {
     "/overrides/:id",
     { preHandler: requirePermission("attendance.manage") },
     async (request: FastifyRequest, reply: FastifyReply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId((request.params as { id: string }).id, reply);
       if (id === null) return;
       const force = forceFromQuery(request.query);
       const result = await deleteOverride(id, request.authData!.userId, force);

src/routes/admin/projects.ts

@@ -89,7 +89,11 @@ export default async function projectsRoutes(
 
       const result = await createProject(parsed.data);
       if ("error" in result)
-        return error(reply, result.error, (result as any).status ?? 400);
+        return error(
+          reply,
+          result.error,
+          (result as { status?: number }).status ?? 400,
+        );
 
       await logAudit({
         request,
@@ -127,7 +131,11 @@ export default async function projectsRoutes(
       const result = await updateProject(id, parsed.data);
       if (!result) return error(reply, "Projekt nenalezen", 404);
       if ("error" in result) {
-        return error(reply, result.error, (result as any).status ?? 400);
+        return error(
+          reply,
+          result.error,
+          (result as { status?: number }).status ?? 400,
+        );
       }
 
       await logAudit({
@@ -160,7 +168,11 @@ export default async function projectsRoutes(
         content: parsed.data.content ?? undefined,
       });
       if (note && "error" in note) {
-        return error(reply, note.error, (note as any).status ?? 400);
+        return error(
+          reply,
+          note.error,
+          (note as { status?: number }).status ?? 400,
+        );
       }
 
       await logAudit({

src/routes/admin/sessions.ts

@@ -82,7 +82,7 @@ export default async function sessionsRoutes(
     "/:id",
     { preHandler: requireAuth },
     async (request, reply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId(request.params.id, reply);
       if (id === null) return;
       const authData = request.authData!;
 

src/routes/admin/trips.ts

@@ -293,7 +293,7 @@ export default async function tripsRoutes(
     "/last-km/:vehicleId",
     { preHandler: requirePermission("trips.manage") },
     async (request, reply) => {
-      const vehicleId = parseId((request.params as any).vehicleId, reply);
+      const vehicleId = parseId(request.params.vehicleId, reply);
       if (vehicleId === null) return;
 
       const [lastTrip, vehicle] = await Promise.all([
@@ -373,7 +373,7 @@ export default async function tripsRoutes(
     "/:id",
     { preHandler: requireAnyPermission("trips.manage", "trips.record") },
     async (request, reply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId(request.params.id, reply);
       if (id === null) return;
       const parsed = parseBody(UpdateTripSchema, request.body);
       if ("error" in parsed) return error(reply, parsed.error, 400);
@@ -461,7 +461,7 @@ export default async function tripsRoutes(
     "/:id",
     { preHandler: requireAnyPermission("trips.manage", "trips.record") },
     async (request, reply) => {
-      const id = parseId((request.params as any).id, reply);
+      const id = parseId(request.params.id, reply);
       if (id === null) return;
       const authData = request.authData!;
       const existing = await prisma.trips.findUnique({ where: { id } });

src/schemas/invoices.schema.ts

@@ -16,6 +16,8 @@ const InvoiceItemSchema = z.object({
   quantity: positiveNumberFromForm.default(1),
   unit: z.string().max(20).nullish(),
   unit_price: numberFromForm.default(0),
+  // Per-item discount as a percentage (0–100); column is Decimal(5,2).
+  discount: numberInRange(0, 100).optional().default(0),
   vat_rate: numberInRange(0, 100).optional().default(21.0),
   position: nonNegativeNumberFromForm.optional(),
 });
@@ -48,6 +50,11 @@ export const CreateInvoiceSchema = z.object({
   // Rich-text CZ/EN "Obsah" sections rendered after the items on the PDF
   // (mirrors issued orders — shared DocumentSectionSchema, DB-aligned limits).
   sections: z.array(DocumentSectionSchema).optional(),
+  // Positional indices of company custom fields to print on this document's PDF.
+  selected_custom_fields: z
+    .array(z.number().int().nonnegative())
+    .max(50)
+    .optional(),
 });
 
 export const UpdateInvoiceSchema = z.object({
@@ -72,6 +79,10 @@ export const UpdateInvoiceSchema = z.object({
   paid_date: nullableIsoDateString,
   items: z.array(InvoiceItemSchema).optional(),
   sections: z.array(DocumentSectionSchema).optional(),
+  selected_custom_fields: z
+    .array(z.number().int().nonnegative())
+    .max(50)
+    .optional(),
 });
 
 export type CreateInvoiceInput = z.infer<typeof CreateInvoiceSchema>;

src/schemas/issued-orders.schema.ts

@@ -41,6 +41,12 @@ export const CreateIssuedOrderSchema = z.object({
   // Rich-text CZ/EN sections rendered on their own PDF page (mirrors offers'
   // scope_sections — shared DocumentSectionSchema, DB-aligned limits).
   sections: z.array(DocumentSectionSchema).optional(),
+  // Positional indices of company custom fields to print on this document's
+  // PDF. Omitted/empty ⇒ none. Update schema derives via .partial().
+  selected_custom_fields: z
+    .array(z.number().int().nonnegative())
+    .max(50)
+    .optional(),
 });
 
 // Update = partial create MINUS the number: PO numbers are immutable

src/schemas/offers.schema.ts

@@ -3,6 +3,7 @@ import {
   nonNegativeIntFromForm,
   nonNegativeNumberFromForm,
   positiveNumberFromForm,
+  numberInRange,
   nullableIntIdFromForm,
   booleanFromForm,
   isoDateString,
@@ -17,6 +18,8 @@ const QuotationItemSchema = z.object({
   quantity: positiveNumberFromForm.default(1),
   unit: z.string().max(20).nullish(),
   unit_price: nonNegativeNumberFromForm.default(0),
+  // Per-item discount as a percentage (0–100); column is Decimal(5,2).
+  discount: numberInRange(0, 100).optional().default(0),
   is_included_in_total: booleanFromForm.optional().default(true),
   // Int column — a float position would 500 at Prisma.
   position: nonNegativeIntFromForm.optional(),
@@ -45,6 +48,12 @@ export const CreateQuotationSchema = z.object({
   scope_description: z.string().max(8000).nullish(),
   items: z.array(QuotationItemSchema).optional(),
   sections: z.array(ScopeSectionSchema).optional(),
+  // Positional indices of company custom fields to print on this document's
+  // PDF. Omitted/empty ⇒ none. Update schema derives via .partial().
+  selected_custom_fields: z
+    .array(z.number().int().nonnegative())
+    .max(50)
+    .optional(),
 });
 
 // Update = partial create MINUS the number: quotation numbers are immutable

src/server.ts

@@ -1,4 +1,5 @@
 import Fastify from "fastify";
+import type { IncomingMessage, ServerResponse } from "http";
 import type { ScheduledTask } from "node-cron";
 import cors from "@fastify/cors";
 import cookie from "@fastify/cookie";
@@ -6,6 +7,7 @@ import rateLimit from "@fastify/rate-limit";
 import path from "path";
 import { config } from "./config/env";
 import { securityHeaders } from "./middleware/security";
+import { registerVersionHeader } from "./middleware/version";
 import prisma from "./config/database";
 
 import authRoutes from "./routes/admin/auth";
@@ -99,6 +101,9 @@ async function start() {
   // --- Security headers ---
   app.addHook("onRequest", securityHeaders);
 
+  // --- Version header: lets the SPA detect a new deploy and prompt a refresh ---
+  registerVersionHeader(app);
+
   // --- Global error handler — consistent { success, error } format ---
   app.setErrorHandler(
     (err: Error & { statusCode?: number }, request, reply) => {
@@ -167,13 +172,26 @@ async function start() {
 
   // --- Frontend: Vite dev middleware (dev only) ---
   if (!config.isProduction) {
+    // `vite` is a dev-only dependency loaded via a runtime import the bundler
+    // can't see (the Function() trick), so its types aren't resolvable under the
+    // server's moduleResolution — describe just the slice we use.
+    type ViteDevServerLike = {
+      middlewares: (
+        req: IncomingMessage,
+        res: ServerResponse,
+        next: (err?: Error) => void,
+      ) => void;
+    };
+    type ViteModuleLike = {
+      createServer: (opts: {
+        server: { middlewareMode: boolean };
+        appType: string;
+      }) => Promise<ViteDevServerLike>;
+    };
     const viteModule = await (Function(
       'return import("vite")',
-    )() as Promise<any>);
-    const createViteServer = viteModule.createServer as (
-      opts: any,
-    ) => Promise<any>;
-    const vite = await createViteServer({
+    )() as Promise<ViteModuleLike>);
+    const vite = await viteModule.createServer({
       server: { middlewareMode: true },
       appType: "spa",
     });

src/services/ai.service.ts

@@ -523,6 +523,8 @@ export async function extractInvoice(
     return JSON.parse(text) as ExtractedInvoice;
   } catch (e) {
     console.error("[ai.service] extractInvoice: model reply was not JSON", e);
-    throw new Error("Model nevrátil platná data faktury (neplatný JSON)");
+    throw new Error("Model nevrátil platná data faktury (neplatný JSON)", {
+      cause: e,
+    });
   }
 }

src/services/exchange-rates.ts

@@ -57,7 +57,9 @@ async function fetchRatesForDate(
       // an entry that is past TTL — better to serve yesterday's rate than fail).
       const stale = rateCache.get(key);
       if (stale) return stale.rates;
-      throw new Error("Nepodařilo se získat aktuální kurzy z ČNB");
+      throw new Error("Nepodařilo se získat aktuální kurzy z ČNB", {
+        cause: err,
+      });
     } finally {
       inflight.delete(key);
     }

src/services/invoices.service.ts

@@ -1,11 +1,16 @@
 import prisma from "../config/database";
 import { utcMidnightOfLocalDay } from "../utils/date";
+import { lineNet } from "../utils/money";
 import { toCzk } from "./exchange-rates";
 import {
   generateInvoiceNumber,
   releaseInvoiceNumber,
   assignInvoiceNumber,
 } from "./numbering.service";
+import {
+  encodeSelectedCustomFields,
+  parseSelectedCustomFields,
+} from "../utils/custom-fields";
 
 // Status transition rules matching PHP.
 // draft -> issued is the finalize step (consumes + assigns the invoice number).
@@ -31,6 +36,8 @@ interface InvoiceItemInput {
   quantity?: number;
   unit?: string | null;
   unit_price?: number;
+  /** Per-item discount as a percentage (0–100). */
+  discount?: number;
   vat_rate?: number;
   position?: number;
 }
@@ -165,14 +172,24 @@ function buildInvoiceWhere(
 }
 
 function computeInvoiceTotals(
-  items: Array<{ quantity: unknown; unit_price: unknown; vat_rate: unknown }>,
+  items: Array<{
+    quantity: unknown;
+    unit_price: unknown;
+    discount?: unknown;
+    vat_rate: unknown;
+  }>,
   applyVat: boolean | null,
   defaultVatRate: unknown,
 ) {
   const { subtotal, vat: vatAmount } = computeMoney(
     items,
     applyVat,
-    (i) => (Number(i.quantity) || 0) * (Number(i.unit_price) || 0),
+    (i) =>
+      lineNet(
+        Number(i.quantity) || 0,
+        Number(i.unit_price) || 0,
+        Number(i.discount),
+      ),
     // Preserve original semantics: a line vat_rate of 0 (non-null, non-"") IS used.
     (i) =>
       i.vat_rate != null && i.vat_rate !== ""
@@ -305,6 +322,7 @@ export function invoiceTotalWithVat(inv: {
   invoice_items: Array<{
     quantity: { toNumber(): number } | null;
     unit_price: { toNumber(): number } | null;
+    discount?: { toNumber(): number } | null;
     vat_rate: { toNumber(): number } | null;
   }>;
 }) {
@@ -312,8 +330,11 @@ export function invoiceTotalWithVat(inv: {
     inv.invoice_items,
     inv.apply_vat,
     (i) =>
-      (Number(i.quantity?.toNumber()) || 0) *
-      (Number(i.unit_price?.toNumber()) || 0),
+      lineNet(
+        Number(i.quantity?.toNumber()) || 0,
+        Number(i.unit_price?.toNumber()) || 0,
+        i.discount?.toNumber(),
+      ),
     // Preserve original `||` semantics: a line rate of 0/NaN falls through to
     // the invoice default, then 21.
     (i) =>
@@ -401,7 +422,12 @@ export async function getInvoiceStats(queryMonth?: number, queryYear?: number) {
     const { vat } = computeMoney(
       inv.invoice_items,
       inv.apply_vat,
-      (item) => (Number(item.quantity) || 0) * (Number(item.unit_price) || 0),
+      (item) =>
+        lineNet(
+          Number(item.quantity) || 0,
+          Number(item.unit_price) || 0,
+          Number(item.discount),
+        ),
       (item) => Number(item.vat_rate) || Number(inv.vat_rate) || 21,
       false, // accumulate raw per-line VAT; round only the per-currency sum
     );
@@ -490,6 +516,9 @@ export async function getInvoice(id: number) {
     customer_name: invoice.customers?.name || null,
     order_number: invoice.orders?.order_number || null,
     valid_transitions: VALID_TRANSITIONS[invoice.status as string] || [],
+    selected_custom_fields: parseSelectedCustomFields(
+      rest.selected_custom_fields,
+    ),
   };
 }
 
@@ -539,6 +568,9 @@ export async function createInvoice(body: InvoiceInput) {
         internal_notes: body.internal_notes
           ? String(body.internal_notes)
           : null,
+        selected_custom_fields: encodeSelectedCustomFields(
+          body.selected_custom_fields,
+        ),
       },
     });
 
@@ -551,6 +583,7 @@ export async function createInvoice(body: InvoiceInput) {
           quantity: item.quantity ?? 1,
           unit: item.unit ?? null,
           unit_price: item.unit_price ?? 0,
+          discount: item.discount ?? 0,
           vat_rate: item.vat_rate ?? 21.0,
           position: item.position ?? i,
         })),
@@ -629,6 +662,10 @@ export async function updateInvoice(id: number, body: InvoiceInput) {
       data.due_date = body.due_date ? new Date(String(body.due_date)) : null;
     if (body.tax_date !== undefined)
       data.tax_date = body.tax_date ? new Date(String(body.tax_date)) : null;
+    if (body.selected_custom_fields !== undefined)
+      data.selected_custom_fields = encodeSelectedCustomFields(
+        body.selected_custom_fields,
+      );
   }
 
   // Internal notes editable in draft/issued/overdue (never printed)
@@ -688,6 +725,7 @@ export async function updateInvoice(id: number, body: InvoiceInput) {
             quantity: item.quantity ?? 1,
             unit: item.unit ?? null,
             unit_price: item.unit_price ?? 0,
+            discount: item.discount ?? 0,
             vat_rate: item.vat_rate ?? 21.0,
             position: item.position ?? i,
           })),

src/services/issued-orders.service.ts

@@ -9,6 +9,10 @@ import {
   isIssuedOrderNumberTaken,
 } from "./numbering.service";
 import { nasOrdersManager } from "./nas-financials-manager";
+import {
+  encodeSelectedCustomFields,
+  parseSelectedCustomFields,
+} from "../utils/custom-fields";
 
 export interface IssuedOrderItemInput {
   description?: string | null;
@@ -125,6 +129,7 @@ const NON_STATUS_UPDATE_FIELDS = [
   "language",
   "order_text",
   "internal_notes",
+  "selected_custom_fields",
   "items",
   "sections",
 ] as const;
@@ -143,6 +148,32 @@ export function computeIssuedOrderTotals(
   return { total: Math.round(total * 100) / 100 };
 }
 
+/**
+ * An issued order may be issued by sections alone (no line items), but a
+ * completely blank order must not be finalizable. Content = at least one item
+ * with a description OR one section with a title or stripped (non-tag) content.
+ * Mirrors the PDF visibility test and the frontend submit guard.
+ */
+function hasOrderContent(
+  items: Array<{ description?: string | null }> | undefined,
+  sections:
+    | Array<{
+        title?: string | null;
+        title_cz?: string | null;
+        content?: string | null;
+      }>
+    | undefined,
+): boolean {
+  const anyItem = (items || []).some((it) => (it.description || "").trim());
+  const anySection = (sections || []).some(
+    (s) =>
+      (s.title_cz || "").trim() ||
+      (s.title || "").trim() ||
+      (s.content || "").replace(/<[^>]*>/g, "").trim(),
+  );
+  return anyItem || anySection;
+}
+
 export async function listIssuedOrders(params: ListIssuedOrdersParams) {
   const { page, limit, skip, sort, order } = params;
   const sortField = ALLOWED_SORT_FIELDS.includes(sort) ? sort : "id";
@@ -253,6 +284,9 @@ export async function getIssuedOrder(id: number) {
     supplier: order.suppliers,
     supplier_name: order.suppliers?.name || null,
     valid_transitions: VALID_TRANSITIONS[order.status as string] || [],
+    selected_custom_fields: parseSelectedCustomFields(
+      rest.selected_custom_fields,
+    ),
   };
 }
 
@@ -261,6 +295,12 @@ export async function createIssuedOrder(body: IssuedOrderInput) {
     return await prisma.$transaction(async (tx) => {
       const status = body.status ? String(body.status) : "draft";
 
+      // A non-draft (created-as-finalized) order must not be blank — require an
+      // item or a non-empty section. Drafts may be saved empty (WIP).
+      if (status !== "draft" && !hasOrderContent(body.items, body.sections)) {
+        return { error: "empty_document" as const };
+      }
+
       // Validate the referenced supplier exists BEFORE the insert — a dangling
       // FK would otherwise surface as a P2003 500 instead of a clean 400.
       const supplierId = body.supplier_id ? Number(body.supplier_id) : null;
@@ -319,6 +359,9 @@ export async function createIssuedOrder(body: IssuedOrderInput) {
           internal_notes: body.internal_notes
             ? String(body.internal_notes)
             : null,
+          selected_custom_fields: encodeSelectedCustomFields(
+            body.selected_custom_fields,
+          ),
         },
       });
 
@@ -424,6 +467,10 @@ export async function updateIssuedOrder(id: number, body: IssuedOrderInput) {
       data.internal_notes = body.internal_notes
         ? String(body.internal_notes)
         : null;
+    if (body.selected_custom_fields !== undefined)
+      data.selected_custom_fields = encodeSelectedCustomFields(
+        body.selected_custom_fields,
+      );
   }
 
   if (body.status !== undefined) data.status = String(body.status);
@@ -437,6 +484,27 @@ export async function updateIssuedOrder(id: number, body: IssuedOrderInput) {
     body.status !== undefined &&
     String(body.status) === "sent";
 
+  // Finalizing a blank order is rejected — require an item or a non-empty
+  // section. The finalize payload carries items/sections; fall back to the
+  // stored rows when a partial finalize omits them.
+  if (finalizing) {
+    const itemsForCheck = Array.isArray(body.items)
+      ? body.items
+      : await prisma.issued_order_items.findMany({
+          where: { issued_order_id: id },
+          select: { description: true },
+        });
+    const sectionsForCheck = Array.isArray(body.sections)
+      ? body.sections
+      : await prisma.issued_order_sections.findMany({
+          where: { issued_order_id: id },
+          select: { title: true, title_cz: true, content: true },
+        });
+    if (!hasOrderContent(itemsForCheck, sectionsForCheck)) {
+      return { error: "empty_document" as const };
+    }
+  }
+
   // ONE transaction for the header write, the finalize numbering AND the
   // items/sections full-replace. The items replace used to run in a SECOND
   // transaction after the header tx — a failure between the two left a torn

src/services/offers.service.ts

@@ -1,5 +1,6 @@
 import { Prisma } from "@prisma/client";
 import prisma from "../config/database";
+import { lineNet } from "../utils/money";
 import {
   generateOfferNumber,
   releaseOfferNumber,
@@ -7,6 +8,10 @@ import {
   assignOfferNumber,
 } from "./numbering.service";
 import { nasOffersManager } from "./nas-offers-manager";
+import {
+  encodeSelectedCustomFields,
+  parseSelectedCustomFields,
+} from "../utils/custom-fields";
 
 interface QuotationItemInput {
   description?: string;
@@ -14,6 +19,8 @@ interface QuotationItemInput {
   quantity?: number;
   unit?: string;
   unit_price?: number;
+  /** Per-item discount as a percentage (0–100). */
+  discount?: number;
   is_included_in_total?: boolean;
   position?: number;
 }
@@ -61,6 +68,7 @@ const NON_STATUS_UPDATE_FIELDS = [
   "language",
   "scope_title",
   "scope_description",
+  "selected_custom_fields",
   "items",
   "sections",
 ] as const;
@@ -115,13 +123,36 @@ function buildOfferWhere(params: OfferFilterParams): Record<string, unknown> {
   return where;
 }
 
+// Structural shape for enrichQuotation — it's called with different selects
+// (full include vs. the minimal totals select), so a single Prisma payload type
+// doesn't fit. Only the fields actually read are pinned; the rest is spread.
+type EnrichableLineItem = {
+  is_included_in_total?: unknown;
+  quantity?: unknown;
+  unit_price?: unknown;
+  discount?: unknown;
+};
+type EnrichableQuotation = {
+  quotation_items: EnrichableLineItem[];
+  scope_sections?: unknown;
+  customers?: { name?: string | null } | null;
+  [key: string]: unknown;
+};
+
 // Offers are NOT tax documents — totals are NET only (no VAT anywhere).
-function enrichQuotation(q: any) {
+// Generic over the concrete payload so `...rest` keeps every field the caller's
+// select actually returned (the return type must stay as rich as the input).
+function enrichQuotation<T extends EnrichableQuotation>(q: T) {
   const total = q.quotation_items
-    .filter((i: any) => i.is_included_in_total !== false)
+    .filter((i) => i.is_included_in_total !== false)
     .reduce(
-      (s: number, i: any) =>
-        s + (Number(i.quantity) || 0) * (Number(i.unit_price) || 0),
+      (s: number, i) =>
+        s +
+        lineNet(
+          Number(i.quantity) || 0,
+          Number(i.unit_price) || 0,
+          Number(i.discount),
+        ),
       0,
     );
   const { quotation_items, scope_sections, ...rest } = q;
@@ -257,10 +288,13 @@ export async function getOffer(id: number) {
     // Computed server-side so the frontend renders only legal status buttons
     // (same contract as getIssuedOrder).
     valid_transitions: VALID_TRANSITIONS[quotation.status] || [],
+    selected_custom_fields: parseSelectedCustomFields(
+      rest.selected_custom_fields,
+    ),
   };
 }
 
-export async function createOffer(body: Record<string, any>) {
+export async function createOffer(body: Record<string, unknown>) {
   try {
     return await prisma.$transaction(async (tx) => {
       const status = body.status ? String(body.status) : "draft";
@@ -316,6 +350,9 @@ export async function createOffer(body: Record<string, any>) {
           scope_description: body.scope_description
             ? String(body.scope_description)
             : null,
+          selected_custom_fields: encodeSelectedCustomFields(
+            body.selected_custom_fields,
+          ),
         },
       });
 
@@ -328,6 +365,7 @@ export async function createOffer(body: Record<string, any>) {
             quantity: item.quantity ?? 1,
             unit: item.unit ?? null,
             unit_price: item.unit_price ?? 0,
+            discount: item.discount ?? 0,
             is_included_in_total: item.is_included_in_total !== false,
             position: item.position ?? i,
           })),
@@ -362,7 +400,7 @@ export async function createOffer(body: Record<string, any>) {
   }
 }
 
-export async function updateOffer(id: number, body: Record<string, any>) {
+export async function updateOffer(id: number, body: Record<string, unknown>) {
   const existing = await prisma.quotations.findUnique({ where: { id } });
   if (!existing) return { error: "not_found" as const };
 
@@ -445,6 +483,10 @@ export async function updateOffer(id: number, body: Record<string, any>) {
           ? String(body.scope_description)
           : null
         : undefined,
+    selected_custom_fields:
+      body.selected_custom_fields !== undefined
+        ? encodeSelectedCustomFields(body.selected_custom_fields)
+        : undefined,
     modified_at: new Date(),
   };
 
@@ -463,6 +505,7 @@ export async function updateOffer(id: number, body: Record<string, any>) {
             quantity: item.quantity ?? 1,
             unit: item.unit ?? null,
             unit_price: item.unit_price ?? 0,
+            discount: item.discount ?? 0,
             is_included_in_total: item.is_included_in_total !== false,
             position: item.position ?? i,
           })),
@@ -585,6 +628,7 @@ export async function duplicateOffer(id: number) {
           quantity: item.quantity,
           unit: item.unit,
           unit_price: item.unit_price,
+          discount: item.discount,
           is_included_in_total: item.is_included_in_total,
           position: item.position,
         })),

src/services/orders.service.ts

@@ -79,11 +79,36 @@ async function syncProjectStatus(
 // silently 0 in the per-currency totals.
 //
 // Orders are NOT tax documents — totals are NET only (no VAT anywhere).
-function enrichOrder(o: any) {
+// Structural shape for enrichOrder — like enrichQuotation it runs over several
+// different selects (full include vs. the minimal totals select), so only the
+// fields actually read are pinned; everything else is spread through.
+type EnrichableLineItem = {
+  is_included_in_total?: unknown;
+  quantity?: unknown;
+  unit_price?: unknown;
+};
+type EnrichableOrder = {
+  order_items: EnrichableLineItem[];
+  order_sections?: unknown;
+  invoices?: Array<{
+    id?: number | null;
+    invoice_number?: string | null;
+  }> | null;
+  customers?: { name?: string | null } | null;
+  quotations?: {
+    quotation_number?: string | null;
+    project_code?: string | null;
+  } | null;
+  [key: string]: unknown;
+};
+
+// Generic over the concrete payload so `...rest` keeps every field the caller's
+// select actually returned (the return type must stay as rich as the input).
+function enrichOrder<T extends EnrichableOrder>(o: T) {
   const total = o.order_items
-    .filter((i: any) => i.is_included_in_total !== false)
+    .filter((i) => i.is_included_in_total !== false)
     .reduce(
-      (s: number, i: any) =>
+      (s: number, i) =>
         s + (Number(i.quantity) || 0) * (Number(i.unit_price) || 0),
       0,
     );

src/services/plan.service.ts

@@ -680,6 +680,11 @@ export async function deleteEntry(
 // Override CRUD
 // ---------------------------------------------------------------------------
 
+/** The work_plan_overrides row shape, derived straight from the Prisma client. */
+type WorkPlanOverride = Awaited<
+  ReturnType<typeof prisma.work_plan_overrides.create>
+>;
+
 /**
  * Create a work_plan_overrides row. Additive: stacks up to
  * MAX_RECORDS_PER_CELL active overrides per (user_id, shift_date); a create
@@ -696,7 +701,7 @@ export async function createOverride(
   },
   actorUserId: number,
   force: boolean,
-): Promise<Result<any>> {
+): Promise<Result<WorkPlanOverride>> {
   const lock = assertNotPastDate(input.shift_date, force);
   if (lock) return lock;
 
@@ -762,7 +767,7 @@ export async function updateOverride(
   input: { project_id?: number | null; category?: string; note?: string },
   actorUserId: number,
   force: boolean,
-): Promise<Result<any>> {
+): Promise<Result<WorkPlanOverride>> {
   const existing = await prisma.work_plan_overrides.findUnique({
     where: { id },
   });

src/services/projects.service.ts

@@ -97,7 +97,7 @@ export async function getProject(id: number) {
   };
 }
 
-export async function updateProject(id: number, body: Record<string, any>) {
+export async function updateProject(id: number, body: Record<string, unknown>) {
   const existing = await prisma.projects.findUnique({ where: { id } });
   if (!existing) return null;
 

src/services/users.service.ts

@@ -61,7 +61,7 @@ export async function listUsers(params: ListUsersParams) {
   const { page, limit, skip, sort, order, search, permission } = params;
   const sortField = ALLOWED_SORT_FIELDS.includes(sort) ? sort : "id";
 
-  const where: any = search
+  const where: Prisma.usersWhereInput = search
     ? {
         OR: [
           { username: { contains: search } },

src/utils/custom-fields.ts

@@ -46,3 +46,36 @@ export function decodeCustomFields(raw: string | null): {
     return { custom_fields: [], field_order: [] };
   }
 }
+
+/**
+ * Per-document selection of which COMPANY custom fields print on a PDF.
+ * Stored positionally (matching the `custom_<i>` keys the PDF builder emits)
+ * as a JSON array string, e.g. "[0,2]". Null/empty means "none selected".
+ */
+export function encodeSelectedCustomFields(indices: unknown): string | null {
+  const clean = normalizeIndices(indices);
+  return clean.length > 0 ? JSON.stringify(clean) : null;
+}
+
+/** Decode the stored selection (string OR defensive array) into a clean number[]. */
+export function parseSelectedCustomFields(raw: unknown): number[] {
+  if (raw == null) return [];
+  if (Array.isArray(raw)) return normalizeIndices(raw);
+  if (typeof raw !== "string" || raw.trim() === "") return [];
+  try {
+    return normalizeIndices(JSON.parse(raw));
+  } catch {
+    // Malformed JSON in a selection column degrades to "none" (expected
+    // condition — a hand-edited/legacy row should never 500 a PDF render).
+    return [];
+  }
+}
+
+function normalizeIndices(input: unknown): number[] {
+  if (!Array.isArray(input)) return [];
+  const set = new Set<number>();
+  for (const v of input) {
+    if (typeof v === "number" && Number.isInteger(v) && v >= 0) set.add(v);
+  }
+  return [...set].sort((a, b) => a - b);
+}

src/utils/money.ts

@@ -0,0 +1,17 @@
+/**
+ * Net amount of a single document line after its per-item percentage discount
+ * ("Sleva"). `net = qty × unit_price × (1 − discount/100)`.
+ *
+ * The discount is tolerant of null/undefined/NaN (a missing discount = none)
+ * and clamped to 0–100 so a stray value can never make the net negative.
+ * Single source of truth for offers + invoices (totals, VAT base, PDFs).
+ */
+export function lineNet(
+  qty: number,
+  unitPrice: number,
+  discountPct: number | null | undefined,
+): number {
+  const pct = Number(discountPct);
+  const safePct = Number.isFinite(pct) ? Math.min(100, Math.max(0, pct)) : 0;
+  return qty * unitPrice * (1 - safePct / 100);
+}

vite.config.ts

@@ -1,10 +1,20 @@
 import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
+import { readFileSync } from "node:fs";
+
+// Bake the package.json version into the bundle so the running SPA can compare
+// it to the server's X-App-Version header and detect a new deploy.
+const appVersion = (
+  JSON.parse(readFileSync("./package.json", "utf8")) as { version: string }
+).version;
 
 export default defineConfig({
   plugins: [react()],
   root: ".",
   publicDir: "public",
+  define: {
+    __APP_VERSION__: JSON.stringify(appVersion),
+  },
   server: {
     port: 3000,
   },