v1.6.8: remove offer exchange rate, add invoice item description, offer filters, table animations

- Remove exchange_rate and exchange_rate_date from quotations (schema, service, PDF, form)
- Add item_description field to invoice_items (schema, migration, service, form, PDF)
- Add offer status/customer/order filters with tab-based UI
- Clean up offer statuses to active/ordered/invalidated
- Allow invalidate action for non-ordered offers (not just expired)
- Add fade animations on offers and invoices table data changes

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/schemas/invoices.schema.ts

@@ -2,6 +2,7 @@ import { z } from "zod";
 
 const InvoiceItemSchema = z.object({
   description: z.string().nullish(),
+  item_description: z.string().nullish(),
   quantity: z
     .union([z.number(), z.string()])
     .transform((v) => {

src/schemas/offers.schema.ts

@@ -59,16 +59,10 @@ export const CreateQuotationSchema = z.object({
     .preprocess((v) => v === true || v === 1 || v === "1", z.boolean())
     .optional()
     .default(true),
-  exchange_rate: z
-    .union([z.number(), z.string()])
-    .transform((v) => Number(v))
-    .refine((v) => !Number.isNaN(v), { message: "Must be a valid number" })
-    .optional()
-    .default(1.0),
   status: z
-    .enum(["nova", "odeslana", "prijata", "odmitnuta", "dokoncena", "active"])
+    .enum(["active", "ordered", "invalidated"])
     .optional()
-    .default("nova"),
+    .default("active"),
   scope_title: z.string().nullish(),
   scope_description: z.string().nullish(),
   items: z.array(QuotationItemSchema).optional(),
@@ -93,14 +87,7 @@ export const UpdateQuotationSchema = z.object({
   apply_vat: z
     .preprocess((v) => v === true || v === 1 || v === "1", z.boolean())
     .optional(),
-  exchange_rate: z
-    .union([z.number(), z.string()])
-    .transform((v) => Number(v))
-    .refine((v) => !Number.isNaN(v), { message: "Must be a valid number" })
-    .optional(),
-  status: z
-    .enum(["nova", "odeslana", "prijata", "odmitnuta", "dokoncena", "active"])
-    .optional(),
+  status: z.enum(["active", "ordered", "invalidated"]).optional(),
   scope_title: z.string().nullish(),
   scope_description: z.string().nullish(),
   items: z.array(QuotationItemSchema).optional(),