feat: named registers, X/Z reports, daily rollup, fix drawerSessionId

Registers:
- New register table with location association
- CRUD service + API routes (POST/GET/PATCH/DELETE /registers)
- Drawer sessions now link to a register via registerId
- Register ID persisted in localStorage per device

X/Z Reports:
- ReportService with getDrawerReport() (X or Z depending on session state)
- Z report auto-displayed on drawer close in the drawer dialog
- X report (Current Shift Report) button on open drawer view
- Report shows: sales summary, payment breakdown, discounts, cash accountability, adjustments

Daily Rollup:
- ReportService.getDailyReport() aggregates all sessions at a location for a date
- New /reports/daily endpoint with locationId + date params
- Frontend daily report page with date picker, location selector, session breakdown

Critical Fix:
- drawerSessionId is now populated on transactions when completing (was never set before)
- This enables accurate per-drawer reporting and cash accountability

Migration 0044: register table, drawer_session.register_id column

Tests: 14 new (register CRUD, drawer report X/Z, drawerSessionId population, daily rollup, register-drawer link)
Full suite: 367 passed

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/admin/src/api/pos.ts

@@ -88,6 +88,15 @@ export interface Product {
   isActive: boolean
 }
 
+export interface Register {
+  id: string
+  locationId: string
+  name: string
+  isActive: boolean
+  createdAt: string
+  updatedAt: string
+}
+
 // --- Query Keys ---
 
 export interface DrawerAdjustment {
@@ -104,6 +113,9 @@ export const posKeys = {
   transaction: (id: string) => ['pos', 'transaction', id] as const,
   drawer: (locationId: string) => ['pos', 'drawer', locationId] as const,
   drawerAdjustments: (id: string) => ['pos', 'drawer-adjustments', id] as const,
+  drawerReport: (id: string) => ['pos', 'drawer-report', id] as const,
+  dailyReport: (locationId: string, date: string) => ['pos', 'daily-report', locationId, date] as const,
+  registers: (locationId: string) => ['pos', 'registers', locationId] as const,
   products: (search: string) => ['pos', 'products', search] as const,
   discounts: ['pos', 'discounts'] as const,
 }
@@ -148,6 +160,30 @@ export function discountListOptions() {
   })
 }
 
+export function registerListOptions(locationId: string | null) {
+  return queryOptions({
+    queryKey: posKeys.registers(locationId ?? ''),
+    queryFn: () => api.get<{ data: Register[] }>('/v1/registers/all', { locationId }),
+    enabled: !!locationId,
+  })
+}
+
+export function drawerReportOptions(drawerSessionId: string | null) {
+  return queryOptions({
+    queryKey: posKeys.drawerReport(drawerSessionId ?? ''),
+    queryFn: () => api.get<any>(`/v1/reports/drawer/${drawerSessionId}`),
+    enabled: !!drawerSessionId,
+  })
+}
+
+export function dailyReportOptions(locationId: string | null, date: string) {
+  return queryOptions({
+    queryKey: posKeys.dailyReport(locationId ?? '', date),
+    queryFn: () => api.get<any>('/v1/reports/daily', { locationId, date }),
+    enabled: !!locationId && !!date,
+  })
+}
+
 // --- Mutations ---
 
 export const posMutations = {
@@ -169,7 +205,7 @@ export const posMutations = {
   void: (txnId: string) =>
     api.post<Transaction>(`/v1/transactions/${txnId}/void`, {}),
 
-  openDrawer: (data: { locationId?: string; openingBalance: number }) =>
+  openDrawer: (data: { locationId?: string; registerId?: string; openingBalance: number }) =>
     api.post<DrawerSession>('/v1/drawer/open', data),
 
   closeDrawer: (id: string, data: { closingBalance: number; denominations?: Record<string, number>; notes?: string }) =>