[CLAUDE] Phase1.2: CRUD Master + Permission Matrix + FE admin pages

Backend:
- Domain/Master: Supplier (+ SupplierType 5 loai), Project, Department (AuditableEntity)
- Domain/Identity: MenuItem, Permission, MenuKeys const (12 menu)
- EF Configurations voi unique Code + query filter IsDeleted
- DbSets + IApplicationDbContext interface update
- Application: PagedResult + PagedRequest generic
- Application/Master CQRS CRUD 3 entity (Create/Update/Delete/Get/List voi paging search sort)
- Application/Permissions: GetMyMenuTree (union OR role, filter tree), ListMenuItems, ListPermissionsByRole, UpsertPermission (guard admin khong tu giam quyen), ListRoles
- Api/Authorization: MenuPermissionRequirement + Handler (Admin bypass, query DB)
- Program.cs: register 48 policy {menu}.{action} tu MenuKeys x Actions
- Api/Controllers: Suppliers, Projects, Departments, Menus, Roles, Permissions
- DbInitializer: seed 12 menu + admin full CRUD permissions
- Migration AddMasterData + AddPermissions

Frontend (fe-admin):
- Types: menuKeys.ts const, menu.ts (MenuNode/Role/Permission), master.ts (Supplier/Project/Department + SupplierType const-object)
- AuthContext: load menu from /menus/me, cache localStorage, refreshMenu()
- usePermission hook + PermissionGuard component (wrap button)
- UI kit them: Dialog (modal overlay), Textarea, Select
- Generic: DataTable (column config, sortable, loading, empty) + Pagination
- PageHeader component
- apiError helper extract message tu ProblemDetails
- Layout rewrite: render menu dong tu AuthContext.menu (MenuGroup collapsible + NavLink + lucide icon map)
- Pages: master/Suppliers, master/Projects, master/Departments (CRUD + search + sort + paging + Dialog form)
- Page system/Permissions: ma tran Role x MenuKey x CRUD checkbox (tick tu dong PUT upsert)
- App.tsx them 4 route moi

Bug fix:
- MenuPermissionHandler: EF expression tree khong support switch expression -> tach switch ra ngoai AnyAsync
- TS erasableSyntaxOnly khong cho enum -> SupplierType const-object pattern (typeof[keyof])

E2E verified via Vite proxy:
- GET /menus/me -> 6 root + 6 child nodes (12 menus)
- GET /roles -> 12 roles
- POST/GET/PUT/DELETE /suppliers -> full CRUD, soft delete OK
- tsc -b fe-admin pass

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fe-admin/src/components/ui/Dialog.tsx

@@ -0,0 +1,48 @@
+import { useEffect, type ReactNode } from 'react'
+import { X } from 'lucide-react'
+import { cn } from '@/lib/cn'
+
+type Props = {
+  open: boolean
+  onClose: () => void
+  title: ReactNode
+  children: ReactNode
+  footer?: ReactNode
+  size?: 'sm' | 'md' | 'lg'
+}
+
+export function Dialog({ open, onClose, title, children, footer, size = 'md' }: Props) {
+  useEffect(() => {
+    if (!open) return
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') onClose()
+    }
+    window.addEventListener('keydown', onKey)
+    return () => window.removeEventListener('keydown', onKey)
+  }, [open, onClose])
+
+  if (!open) return null
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40 p-4" onClick={onClose}>
+      <div
+        className={cn(
+          'w-full rounded-lg bg-white shadow-xl',
+          size === 'sm' && 'max-w-md',
+          size === 'md' && 'max-w-xl',
+          size === 'lg' && 'max-w-3xl',
+        )}
+        onClick={e => e.stopPropagation()}
+      >
+        <div className="flex items-center justify-between border-b border-slate-200 px-5 py-3">
+          <div className="text-base font-semibold text-slate-900">{title}</div>
+          <button onClick={onClose} className="rounded p-1 text-slate-500 hover:bg-slate-100">
+            <X className="h-4 w-4" />
+          </button>
+        </div>
+        <div className="max-h-[70vh] overflow-auto p-5">{children}</div>
+        {footer && <div className="flex items-center justify-end gap-2 border-t border-slate-200 px-5 py-3">{footer}</div>}
+      </div>
+    </div>
+  )
+}

fe-admin/src/components/ui/Select.tsx

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+import { forwardRef, type SelectHTMLAttributes } from 'react'
+import { cn } from '@/lib/cn'
+
+type Props = SelectHTMLAttributes<HTMLSelectElement>
+
+export const Select = forwardRef<HTMLSelectElement, Props>(({ className, children, ...props }, ref) => (
+  <select
+    ref={ref}
+    className={cn(
+      'h-10 w-full rounded-md border border-slate-300 bg-white px-3 text-sm focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand-500 disabled:opacity-50',
+      className,
+    )}
+    {...props}
+  >
+    {children}
+  </select>
+))
+Select.displayName = 'Select'

fe-admin/src/components/ui/Textarea.tsx

@@ -0,0 +1,16 @@
+import { forwardRef, type TextareaHTMLAttributes } from 'react'
+import { cn } from '@/lib/cn'
+
+type Props = TextareaHTMLAttributes<HTMLTextAreaElement>
+
+export const Textarea = forwardRef<HTMLTextAreaElement, Props>(({ className, ...props }, ref) => (
+  <textarea
+    ref={ref}
+    className={cn(
+      'w-full rounded-md border border-slate-300 bg-white px-3 py-2 text-sm placeholder:text-slate-400 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand-500 disabled:opacity-50',
+      className,
+    )}
+    {...props}
+  />
+))
+Textarea.displayName = 'Textarea'