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/pages/AttendanceHistory.tsx

@@ -5,7 +5,11 @@ import Forbidden from "../components/Forbidden";
 import { motion } from "framer-motion";
 import AdminDatePicker from "../components/AdminDatePicker";
 import { companySettingsOptions } from "../lib/queries/settings";
-import { attendanceHistoryOptions } from "../lib/queries/attendance";
+import {
+  attendanceHistoryOptions,
+  type AttendanceRecord,
+  type ProjectLogEntry,
+} from "../lib/queries/attendance";
 import {
   formatDate,
   formatDatetime,
@@ -20,29 +24,6 @@ import {
 import FormField from "../components/FormField";
 import { Skeleton } from "boneyard-js/react";
 import AttendanceHistoryFixture from "../fixtures/AttendanceHistoryFixture";
-interface ProjectLog {
-  id?: number;
-  project_id?: number;
-  project_name?: string;
-  started_at?: string;
-  ended_at?: string | null;
-  hours?: string | number | null;
-  minutes?: string | number | null;
-}
-
-interface AttendanceRecord {
-  id: number;
-  shift_date: string;
-  leave_type?: string;
-  leave_hours?: number;
-  arrival_time?: string | null;
-  departure_time?: string | null;
-  break_start?: string | null;
-  break_end?: string | null;
-  notes?: string;
-  project_name?: string;
-  project_logs?: ProjectLog[];
-}
 
 const MONTH_NAMES = [
   "Leden",
@@ -196,9 +177,7 @@ export default function AttendanceHistory() {
   const { user, hasPermission } = useAuth();
   const queryClient = useQueryClient();
   const { data: companySettings } = useQuery(companySettingsOptions());
-  const companyName =
-    ((companySettings as Record<string, unknown> | undefined)
-      ?.company_name as string) || "";
+  const companyName = companySettings?.company_name || "";
   const printRef = useRef<HTMLDivElement>(null);
   const [month, setMonth] = useState(() => {
     const now = new Date();
@@ -207,7 +186,7 @@ export default function AttendanceHistory() {
   const { data, isPending } = useQuery(
     attendanceHistoryOptions({ month, userId: user?.id }),
   );
-  const records = (data as AttendanceRecord[] | undefined) ?? [];
+  const records = data ?? [];
 
   const computed = useMemo(() => {
     const [yearStr, monthStr] = month.split("-");