fix(types): resolve all client TypeScript errors (attendance + plan rollback)

- AttendanceAdmin: declare worked_hours_raw on UserTotalData (the hook sets it at runtime; the local interface omitted it)
- usePlanWork.rollbackMutation: type the mutation param as unknown + explicit cast so passing the TanStack mutation result (with the dynamically-stashed _rolled) no longer trips the weak-type check
tsc -p tsconfig.app.json --noEmit is now clean (0 errors, was 9).

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

src/admin/pages/AttendanceAdmin.tsx

@@ -21,6 +21,9 @@ interface UserTotalData {
   unpaid_hours: number;
   fund: number | null;
   worked_hours: number;
+  // Raw worked hours incl. sub-day remainders (set by computeUserTotals in
+  // useAttendanceAdmin); used for the Fond "used" calculation below.
+  worked_hours_raw?: number;
   covered: number;
   missing: number;
   overtime: number;