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/users.ts

@@ -1,6 +1,23 @@
 import { queryOptions } from "@tanstack/react-query";
 import { jsonQuery } from "../apiAdapter";
 
+export interface User {
+  id: number;
+  username: string;
+  email: string;
+  first_name: string;
+  last_name: string;
+  role_id: number;
+  roles?: { id: number; name: string; display_name: string } | null;
+  is_active: boolean;
+}
+
+export interface Role {
+  id: number;
+  name: string;
+  display_name: string;
+}
+
 export const userListOptions = (permission?: string) =>
   queryOptions({
     queryKey: ["users", { permission }],
@@ -8,13 +25,13 @@ export const userListOptions = (permission?: string) =>
       const url = permission
         ? `/api/admin/users?permission=${encodeURIComponent(permission)}&limit=100`
         : "/api/admin/users?limit=100";
-      return jsonQuery<Record<string, unknown>>(url);
+      return jsonQuery<User[]>(url);
     },
   });
 
 export const roleListOptions = () =>
   queryOptions({
     queryKey: ["roles"],
-    queryFn: () => jsonQuery<Record<string, unknown>[]>("/api/admin/roles"),
+    queryFn: () => jsonQuery<Role[]>("/api/admin/roles"),
     staleTime: 2 * 60_000,
   });