fix: security, validation, and data integrity fixes across 53 files

- Auth: HS256 algorithm restriction on JWT verify, timing-safe bcrypt
  for inactive/locked users, locked_until check in loadAuthData, TOTP
  fixes (async bcrypt, BigInt conversion, future-code counter fix)
- Validation: Zod enums for leave_type/status, numeric transforms on
  foreign keys, VAT 0% coercion fix (Number(v)||21 → v!=null checks)
- Permissions: requirePermission on attendance PUT, attendance_users
  and project_logs access checks, trips users filtered by trips.record
- Prisma queries: fixed roles.is:{OR} pattern (doesn't work on to-one
  relations), attendance_users now filters by attendance.record only
- Transactions: wrapped deleteOrder, createOrder, updateUser, deleteUser,
  duplicateOffer, bulkCreateAttendance, createLeave, scope-templates,
  leave-requests, company-settings, profile updates
- Frontend: mountedRef reset in useListData, blob URL cleanup on unmount,
  null checks on date fields, AdminDatePicker min/max for HH:mm
- Security headers: COOP, CORP, CSP frame-ancestors/form-action/base-uri
- Other: exchange-rate cache TTL, invoice-alert midnight comparison fix,
  numbering.service releaseSequence no-op, nas-offers filename sanitize,
  Content-Disposition header injection fix, mojibake Czech strings

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

src/config/env.ts

@@ -53,11 +53,11 @@ export const config = {
   totp: {
     encryptionKey: required("TOTP_ENCRYPTION_KEY"),
     algorithm: (process.env.TOTP_ALGORITHM || "SHA1") as "SHA1",
-    digits: parseInt(process.env.TOTP_DIGITS || "6", 10),
-    period: parseInt(process.env.TOTP_PERIOD || "30", 10),
-    loginTokenExpiryMinutes: parseInt(
-      process.env.LOGIN_TOKEN_EXPIRY_MINUTES || "5",
-      10,
+    digits: Math.max(6, parseInt(process.env.TOTP_DIGITS || "6", 10) || 6),
+    period: Math.max(15, parseInt(process.env.TOTP_PERIOD || "30", 10) || 30),
+    loginTokenExpiryMinutes: Math.max(
+      1,
+      parseInt(process.env.LOGIN_TOKEN_EXPIRY_MINUTES || "5", 10) || 5,
     ),
   },