Initial scaffold: wages app

Full wage cost reporting app — weekly/monthly views, rolling 12-week/12-month
history, budget management, Workforce API sync with SSE backfill, net sales
via forecasting public API, department filter, CSV export.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/types.ts

@@ -0,0 +1,49 @@
+export interface User {
+  email: string
+  name: string
+  is_admin: boolean
+  caps: string[]
+}
+
+export function can(user: User, cap: string): boolean {
+  return user.is_admin || user.caps.includes(cap)
+}
+
+export interface DeptActuals {
+  department_id: string
+  department_name: string
+  days: Record<string, { base_cost: number; total_cost: number; cost: number; shift_count: number }>
+}
+
+export interface DeptScheduled {
+  department_id: string
+  department_name: string
+  days: Record<string, { cost: number; shift_count: number }>
+}
+
+export interface NetSalesDay {
+  date: string
+  net_sales: number
+  py_sales: number
+  accom: number
+  dry: number
+  wet: number
+  is_past: boolean
+}
+
+export interface WageBudget {
+  month: string   // 'YYYY-MM-DD' (first of month)
+  budget_amount: number
+}
+
+export interface Department {
+  id: string
+  name: string
+  enabled?: boolean
+}
+
+export interface AppSetting {
+  key: string
+  value: string
+  updated_at: string
+}