[CLAUDE] Phase3: Workflow MVP — 9-phase state machine + code gen + FE Inbox/Detail

Backend Contracts domain (5 entities):
- Contract aggregate: Phase (9 enum), SlaDeadline, MaHopDong, BypassProcurementAndCCM, DraftData, SlaWarningSent
- ContractApproval: FromPhase → ToPhase, ApproverUserId (null = system auto-approve), Decision, Comment
- ContractComment: thread theo Phase current
- ContractAttachment: FileName + StoragePath + Purpose (DraftExport/ScannedSigned/SealedCopy)
- ContractCodeSequence: Prefix PK + LastSeq — atomic gen

EF configs:
- Unique MaHopDong filtered [MaHopDong] IS NOT NULL
- Indexes: Phase+IsDeleted, SupplierId, ProjectId, SlaDeadline, ContractId+ApprovedAt, ContractId+CreatedAt
- Cascade delete Approvals/Comments/Attachments khi Contract xoa
- Query filter IsDeleted
- Migration AddContractsWorkflow (DB 19 tables)

Workflow service:
- IContractWorkflowService.TransitionAsync:
  - Adjacency check qua Transitions Dict<(from,to), roles[]> (12 transitions)
  - Role guard: user phai co role ∈ allowed
  - Admin bypass (role Admin pass moi check)
  - System bypass (userId=null + Decision=AutoApprove → cho SLA job sau nay)
  - Bypass CCM: BypassProcurementAndCCM=true cho phep DangInKy → DangTrinhKy skip phase 6
  - Gen ma HD khi chuyen DangDongDau (idempotent — khong gen lai neu da co)
  - Reset SlaDeadline = UtcNow + PhaseSla
  - Insert ContractApproval row

Code generator (RG-001):
- 7 format theo ContractType: HDTP / HDGK / NCC / HDDV / MB + 2 framework (year prefix)
- BeginTransactionAsync(Serializable) + ContractCodeSequences UPSERT → atomic
- Idempotent: neu MaHopDong da co thi skip

CQRS (8 feature, ContractFeatures.cs):
- CreateContractCommand + Validator + Handler (set SlaDeadline = +7d)
- UpdateContractDraftCommand (chi khi Phase=DangSoanThao)
- TransitionContractCommand (delegate → WorkflowService)
- AddCommentCommand (phase = hien tai)
- ListContractsQuery (PagedResult + filter phase/supplier/project/search)
- GetMyInboxQuery (map Phase → actor roles, filter theo role user)
- GetContractQuery (detail + approvals + comments + attachments + resolve user names)
- DeleteContractCommand (soft, block > DangInKy)

Controller:
- ContractsController 8 endpoint: GET list/inbox/detail, POST create/transition/comment, PUT update, DELETE

Frontend fe-admin (2 page moi):
- types/contracts.ts: ContractPhase const + Label + Color maps + types
- components/PhaseBadge.tsx
- pages/contracts/ContractsListPage.tsx: filter phase + search + click → detail
- pages/contracts/ContractDetailPage.tsx: 2-col layout (info+comments | timeline), action dialog select target phase + comment

Frontend fe-user (4 page moi + 14 file shared):
- cp 14 file shared tu fe-admin (menuKeys, types/*, DataTable, PhaseBadge, Dialog, Textarea, Select, apiError, usePermission, PermissionGuard)
- AuthContext update: load menu tu /menus/me + cache
- Layout: menu fixed 3 muc + user info + roles display
- InboxPage: list HD cho role user xu ly (sort theo SLA)
- ContractCreatePage: form chon loai + template + NCC + du an + gia tri + bypass CDT
- ContractDetailPage: duplicate fe-admin pattern (convention)
- MyContractsPage: list HD cua toi
- App.tsx: 4 route moi

E2E verified:
- Setup Supplier + Project
- POST /contracts → 201 + phase=2
- POST /contracts/{id}/transitions x7 → di het 9 phase
- Final: MaHopDong = "FLOCK 01/HĐGK/SOL&PVL2026/01" dung format RG-001
- Approvals: 7 rows audit day du

Docs:
- .claude/skills/contract-workflow/SKILL.md: placeholder → full spec voi state machine, SLA table, role matrix, 7 code format, code pointers, API, E2E workflow, pitfalls
- docs/changelog/sessions/2026-04-21-1330-phase3-workflow.md: session log
- docs/STATUS.md: Phase 3 MVP done, next Phase 4
- docs/HANDOFF.md: update phase status + file tree + commit log + testing points
- docs/changelog/migration-todos.md: tick Phase 3 MVP items + add iteration 2 list

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

fe-user/src/components/DataTable.tsx

@@ -0,0 +1,151 @@
+import type { ReactNode } from 'react'
+import { ChevronDown, ChevronUp } from 'lucide-react'
+import { cn } from '@/lib/cn'
+
+export type Column<T> = {
+  key: string
+  header: ReactNode
+  render: (row: T) => ReactNode
+  sortable?: boolean
+  width?: string
+  align?: 'left' | 'center' | 'right'
+}
+
+type Props<T> = {
+  columns: Column<T>[]
+  rows: T[]
+  getRowKey: (row: T) => string
+  isLoading?: boolean
+  empty?: ReactNode
+  sortBy?: string
+  sortDesc?: boolean
+  onSortChange?: (sortBy: string, sortDesc: boolean) => void
+  onRowClick?: (row: T) => void
+}
+
+export function DataTable<T>({
+  columns,
+  rows,
+  getRowKey,
+  isLoading,
+  empty,
+  sortBy,
+  sortDesc,
+  onSortChange,
+  onRowClick,
+}: Props<T>) {
+  return (
+    <div className="overflow-auto rounded-md border border-slate-200 bg-white">
+      <table className="w-full text-sm">
+        <thead className="bg-slate-50 text-slate-700">
+          <tr>
+            {columns.map(c => (
+              <th
+                key={c.key}
+                className={cn(
+                  'px-3 py-2 font-medium',
+                  c.align === 'right' && 'text-right',
+                  c.align === 'center' && 'text-center',
+                  c.align !== 'right' && c.align !== 'center' && 'text-left',
+                  c.width,
+                )}
+              >
+                {c.sortable && onSortChange ? (
+                  <button
+                    onClick={() => onSortChange(c.key, sortBy === c.key ? !sortDesc : false)}
+                    className="inline-flex items-center gap-1 hover:text-slate-900"
+                  >
+                    {c.header}
+                    {sortBy === c.key && (sortDesc ? <ChevronDown className="h-3.5 w-3.5" /> : <ChevronUp className="h-3.5 w-3.5" />)}
+                  </button>
+                ) : (
+                  c.header
+                )}
+              </th>
+            ))}
+          </tr>
+        </thead>
+        <tbody>
+          {isLoading && (
+            <tr>
+              <td colSpan={columns.length} className="px-3 py-8 text-center text-slate-500">
+                Đang tải…
+              </td>
+            </tr>
+          )}
+          {!isLoading && rows.length === 0 && (
+            <tr>
+              <td colSpan={columns.length} className="px-3 py-8 text-center text-slate-500">
+                {empty ?? 'Không có dữ liệu'}
+              </td>
+            </tr>
+          )}
+          {!isLoading &&
+            rows.map(row => (
+              <tr
+                key={getRowKey(row)}
+                className={cn(
+                  'border-t border-slate-100 transition',
+                  onRowClick && 'cursor-pointer hover:bg-slate-50',
+                )}
+                onClick={() => onRowClick?.(row)}
+              >
+                {columns.map(c => (
+                  <td
+                    key={c.key}
+                    className={cn(
+                      'px-3 py-2',
+                      c.align === 'right' && 'text-right',
+                      c.align === 'center' && 'text-center',
+                    )}
+                  >
+                    {c.render(row)}
+                  </td>
+                ))}
+              </tr>
+            ))}
+        </tbody>
+      </table>
+    </div>
+  )
+}
+
+type PaginationProps = {
+  page: number
+  pageSize: number
+  total: number
+  onChange: (page: number) => void
+}
+
+export function Pagination({ page, pageSize, total, onChange }: PaginationProps) {
+  const totalPages = Math.max(1, Math.ceil(total / pageSize))
+  const from = total === 0 ? 0 : (page - 1) * pageSize + 1
+  const to = Math.min(page * pageSize, total)
+
+  return (
+    <div className="flex items-center justify-between py-3 text-sm text-slate-600">
+      <span>
+        {from}–{to} / {total}
+      </span>
+      <div className="flex gap-1">
+        <button
+          disabled={page <= 1}
+          onClick={() => onChange(page - 1)}
+          className="rounded-md border border-slate-300 bg-white px-3 py-1 disabled:opacity-50"
+        >
+          Trước
+        </button>
+        <span className="px-3 py-1">
+          Trang {page}/{totalPages}
+        </span>
+        <button
+          disabled={page >= totalPages}
+          onClick={() => onChange(page + 1)}
+          className="rounded-md border border-slate-300 bg-white px-3 py-1 disabled:opacity-50"
+        >
+          Sau
+        </button>
+      </div>
+    </div>
+  )
+}

fe-user/src/components/Layout.tsx

@@ -1,12 +1,20 @@
 import { Link, NavLink, Outlet } from 'react-router-dom'
-import { LogOut, Inbox, FileText, Plus } from 'lucide-react'
+import { LogOut, Circle, Inbox, FileText, Plus, type LucideIcon } from 'lucide-react'
+import * as Icons from 'lucide-react'
 import { useAuth } from '@/contexts/AuthContext'
 import { cn } from '@/lib/cn'
 
-const menuItems = [
-  { to: '/inbox', label: 'Chờ xử lý', icon: Inbox },
-  { to: '/my-contracts', label: 'HĐ của tôi', icon: FileText },
+function getIcon(name: string | null): LucideIcon {
+  if (!name) return Circle
+  const cand = (Icons as unknown as Record<string, LucideIcon>)[name]
+  return cand ?? Circle
+}
+
+// Menu fixed cho fe-user (không show tree động vì user-flow đơn giản)
+const USER_MENU = [
+  { to: '/inbox', label: 'HĐ chờ xử lý', icon: Inbox },
   { to: '/contracts/new', label: 'Tạo HĐ mới', icon: Plus },
+  { to: '/my-contracts', label: 'HĐ của tôi', icon: FileText },
 ]
 
 export function Layout() {
@@ -21,28 +29,32 @@ export function Layout() {
           </Link>
         </div>
         <nav className="flex-1 space-y-1 p-3">
-          {menuItems.map(item => (
-            <NavLink
-              key={item.to}
-              to={item.to}
-              className={({ isActive }) =>
-                cn(
-                  'flex items-center gap-3 rounded-md px-3 py-2 text-sm font-medium transition',
-                  isActive
-                    ? 'bg-brand-50 text-brand-700'
-                    : 'text-slate-600 hover:bg-slate-100 hover:text-slate-900',
-                )
-              }
-            >
-              <item.icon className="h-4 w-4" />
-              {item.label}
-            </NavLink>
-          ))}
+          {USER_MENU.map(item => {
+            const Icon = item.icon ?? getIcon(null)
+            return (
+              <NavLink
+                key={item.to}
+                to={item.to}
+                className={({ isActive }) =>
+                  cn(
+                    'flex items-center gap-3 rounded-md px-3 py-2 text-sm font-medium transition',
+                    isActive ? 'bg-brand-50 text-brand-700' : 'text-slate-600 hover:bg-slate-100 hover:text-slate-900',
+                  )
+                }
+              >
+                <Icon className="h-4 w-4" />
+                {item.label}
+              </NavLink>
+            )
+          })}
         </nav>
         <div className="border-t border-slate-200 p-3">
           <div className="mb-2 px-3 text-xs text-slate-500">
-            <div className="font-medium text-slate-700">{user?.fullName}</div>
+            <div className="truncate font-medium text-slate-700">{user?.fullName}</div>
             <div className="truncate">{user?.email}</div>
+            {user && user.roles.length > 0 && (
+              <div className="mt-1 font-mono text-[10px]">{user.roles.join(', ')}</div>
+            )}
           </div>
           <button
             onClick={logout}

fe-user/src/components/PageHeader.tsx

@@ -0,0 +1,13 @@
+import type { ReactNode } from 'react'
+
+export function PageHeader({ title, description, actions }: { title: ReactNode; description?: ReactNode; actions?: ReactNode }) {
+  return (
+    <div className="mb-5 flex items-start justify-between gap-4">
+      <div>
+        <h1 className="text-xl font-bold text-slate-900">{title}</h1>
+        {description && <p className="mt-1 text-sm text-slate-600">{description}</p>}
+      </div>
+      {actions && <div className="flex items-center gap-2">{actions}</div>}
+    </div>
+  )
+}

fe-user/src/components/PermissionGuard.tsx

@@ -0,0 +1,16 @@
+import type { ReactNode } from 'react'
+import { usePermission } from '@/hooks/usePermission'
+import type { CrudAction } from '@/lib/menuKeys'
+
+type Props = {
+  menuKey: string
+  action?: CrudAction
+  fallback?: ReactNode
+  children: ReactNode
+}
+
+export function PermissionGuard({ menuKey, action = 'Read', fallback = null, children }: Props) {
+  const { can } = usePermission()
+  if (!can(menuKey, action)) return <>{fallback}</>
+  return <>{children}</>
+}

fe-user/src/components/PhaseBadge.tsx

@@ -0,0 +1,10 @@
+import { cn } from '@/lib/cn'
+import { ContractPhaseColor, ContractPhaseLabel } from '@/types/contracts'
+
+export function PhaseBadge({ phase, className }: { phase: number; className?: string }) {
+  return (
+    <span className={cn('inline-flex rounded-full px-2 py-0.5 text-xs font-medium', ContractPhaseColor[phase], className)}>
+      {ContractPhaseLabel[phase]}
+    </span>
+  )
+}

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

@@ -0,0 +1,18 @@
+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-user/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'