fix: 2026-06-09 full-codebase audit hardening

Validation: shared NaN-guarded Zod coercion helpers in schemas/common.ts replace
the raw number|string transform idiom across every schema (the root-cause NaN bug
class); emailOrEmpty + lenient isoDateString/timeString.

Security: roles privilege-escalation closed; refresh-token family revocation on
reuse; TOTP uses config params; read endpoints permission-guarded; received-invoices
gross VAT on all paths; orders-pdf custom-items authz.

Concurrency: $queryRaw SELECT...FOR UPDATE locks in ascending-id order (warehouse
confirm/cancel, attendance lockUserRow); uniqueness checks moved into create
transactions (TOCTOU -> 409); deterministic id tiebreak on second-precision
timestamp ordering (plan resolveCell/resolveGrid, warehouse FIFO).

Frontend: Rules-of-Hooks fixed across ~14 pages + PlanCellModal; UTC-date persisted
fields; dashboard invalidation gaps; stale-closure confirm bugs.

Tooling/tests: ESLint flat config (react-hooks/rules-of-hooks = error) + Prettier;
tsconfig.test.json so tsc -b type-checks the tests; removed 3 dead deps; npm audit
fix (8 -> 3). Suite 195 -> 247 (happy-path auth, FIFO oldest-first, flakiness fixes),
isolated on app_test via .env.test with a hard-throw setup guard.

Gates: tsc 0 | build 0 | vitest 247/247 | eslint 0 errors.

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

src/routes/admin/ai.ts

@@ -113,6 +113,9 @@ export default async function aiRoutes(app: FastifyInstance): Promise<void> {
         fields?: ExtractedInvoice;
         error?: string;
       }> = [];
+      // True when the loop stops early because the budget was hit mid-batch —
+      // surfaced to the client so it knows trailing files were NOT processed.
+      let truncated = false;
       for await (const part of parts) {
         if (part.type !== "file") continue;
         const buf = await part.toBuffer();
@@ -128,11 +131,14 @@ export default async function aiRoutes(app: FastifyInstance): Promise<void> {
         }
         // Re-check the budget between files so one batch can't blow far past it.
         const over = await assertBudgetAvailable();
-        if (over) break;
+        if (over) {
+          truncated = true;
+          break;
+        }
       }
       if (results.length === 0)
         return error(reply, "Nebyl nahrán žádný soubor", 400);
-      return success(reply, { invoices: results });
+      return success(reply, { invoices: results, truncated });
     },
   );