v1.6.5: fix attendance unique constraint, schema sync, seed script

- Change attendance idx_attendance_user_date from unique to index (allow multiple shifts per day)
- Reset migrations to single baseline init migration
- Add seed script with admin user (admin/admin)
- Update CLAUDE.md with migration workflow documentation
- Various frontend fixes (queries, pages, hooks)

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

src/admin/lib/queries/settings.ts

@@ -1,11 +1,63 @@
 import { queryOptions } from "@tanstack/react-query";
 import { jsonQuery } from "../apiAdapter";
 
+export interface CompanySettingsCustomField {
+  name: string;
+  value: string;
+  showLabel: boolean;
+}
+
+export interface CompanySettingsData {
+  // Company info
+  company_name?: string;
+  street?: string;
+  city?: string;
+  postal_code?: string;
+  country?: string;
+  company_id?: string;
+  vat_id?: string;
+  ico?: string;
+  dic?: string;
+  has_logo?: boolean;
+  has_logo_dark?: boolean;
+  custom_fields?: CompanySettingsCustomField[];
+  supplier_field_order?: string[];
+
+  // System settings
+  require_2fa?: boolean;
+  default_currency?: string;
+  default_vat_rate?: number;
+  available_currencies?: string[];
+  available_vat_rates?: number[];
+  break_threshold_hours?: number;
+  break_duration_short?: number;
+  break_duration_long?: number;
+  clock_rounding_minutes?: number;
+  invoice_alert_email?: string;
+  leave_notify_email?: string;
+  smtp_from?: string;
+  smtp_from_name?: string;
+  max_login_attempts?: number;
+  lockout_minutes?: number;
+  max_requests_per_minute?: number;
+
+  // Numbering
+  quotation_prefix?: string;
+  order_type_code?: string;
+  invoice_type_code?: string;
+  offer_number_pattern?: string;
+  order_number_pattern?: string;
+  invoice_number_pattern?: string;
+
+  // Misc
+  app_version?: string;
+}
+
 export const companySettingsOptions = () =>
   queryOptions({
     queryKey: ["company-settings"],
     queryFn: () =>
-      jsonQuery<Record<string, unknown>>("/api/admin/company-settings"),
+      jsonQuery<CompanySettingsData>("/api/admin/company-settings"),
     staleTime: 5 * 60_000,
   });