接单平台新增 VIP 等级体系与邀请绑定

- 等级按累计验收通过工单数自动升级（阈值后台可配），VIP1-5 默认配置 10/30/50/100
- 存量打手统一归 VIP1，原 regular 等级停用
- 注册支持邀请码绑定邀请人，每人生成唯一邀请码
- 新增 worker_level_logs 升级流水表
- 个人中心展示邀请码与升级进度，管理端等级表单支持升级阈值配置

apps/backend/src/repositories/worker-platform-repo.ts

@@ -26,6 +26,10 @@ export type WorkerUserRow = {
   created_at: string
   updated_at: string
   reviewed_at: string | null
+  inviter_id: number | null
+  invite_code: string
+  inviter_username?: string
+  inviter_display_name?: string
   level_key?: string
   level_name?: string
   level_permission_json?: string | Record<string, unknown>
@@ -192,6 +196,8 @@ type CreateWorkerInput = {
   phone: string
   levelId: number | null
   status: string
+  inviterId?: number | null
+  inviteCode: string
   now: string
 }
 
@@ -218,12 +224,15 @@ const WORKER_USER_SELECT = `
     wl.level_key,
     wl.name AS level_name,
     wl.permission_json AS level_permission_json,
+    inv.username AS inviter_username,
+    inv.display_name AS inviter_display_name,
     ww.available_amount,
     ww.frozen_deposit_amount,
     ww.total_credited_amount,
     ww.total_settled_amount
   FROM worker_users wu
   LEFT JOIN worker_levels wl ON wl.id = wu.level_id
+  LEFT JOIN worker_users inv ON inv.id = wu.inviter_id
   LEFT JOIN worker_wallets ww ON ww.worker_id = wu.id
 `
 
@@ -325,6 +334,16 @@ export async function getWorkerUserByUsername(username: string): Promise<WorkerU
   return result.rows[0] || null
 }
 
+export async function getWorkerUserByInviteCode(
+  inviteCode: string,
+): Promise<WorkerUserRow | null> {
+  const result = await query<WorkerUserRow>(
+    `${WORKER_USER_SELECT} WHERE wu.invite_code = $1 LIMIT 1`,
+    [String(inviteCode || '').trim().toUpperCase()],
+  )
+  return result.rows[0] || null
+}
+
 export async function getWorkerUserById(workerId: number | string): Promise<WorkerUserRow | null> {
   const result = await query<WorkerUserRow>(`${WORKER_USER_SELECT} WHERE wu.id = $1 LIMIT 1`, [
     Number(workerId),
@@ -338,8 +357,9 @@ export async function createWorkerUser(input: CreateWorkerInput): Promise<Worker
       `
         INSERT INTO worker_users (
           username, password_hash, display_name, phone, level_id, status,
+          inviter_id, invite_code,
           created_at, updated_at
-        ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+        ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
         RETURNING id
       `,
       [
@@ -349,6 +369,8 @@ export async function createWorkerUser(input: CreateWorkerInput): Promise<Worker
         input.phone,
         input.levelId,
         input.status,
+        input.inviterId || null,
+        input.inviteCode,
         input.now,
         input.now,
       ],
@@ -824,6 +846,64 @@ export async function countWorkerAcceptedOrders(workerId: number | string): Prom
   return Number(result.rows[0]?.total || 0)
 }
 
+export async function maybeUpgradeWorkerLevelWithClient(
+  client: PoolClient,
+  workerId: number,
+  now: string,
+): Promise<WorkerUserRow | null> {
+  const acceptedResult = await client.query<{ total: number }>(
+    `
+      SELECT COUNT(*)::int AS total
+      FROM work_orders
+      WHERE assigned_worker_id = $1
+        AND status = 'accepted'
+    `,
+    [workerId],
+  )
+  const acceptedCount = Number(acceptedResult.rows[0]?.total || 0)
+
+  const nextLevelResult = await client.query<{ id: number }>(
+    `
+      SELECT id
+      FROM worker_levels
+      WHERE status = 'active'
+        AND COALESCE((permission_json->>'upgradeThreshold')::int, 0) <= $1
+      ORDER BY COALESCE((permission_json->>'upgradeThreshold')::int, 0) DESC, sort_order ASC
+      LIMIT 1
+    `,
+    [acceptedCount],
+  )
+  const nextLevelId = Number(nextLevelResult.rows[0]?.id || 0)
+  if (!nextLevelId) return null
+
+  const current = await client.query<{ id: number; level_id: number | null }>(
+    'SELECT id, level_id FROM worker_users WHERE id = $1 LIMIT 1',
+    [workerId],
+  )
+  const currentRow = current.rows[0]
+  if (!currentRow || Number(currentRow.level_id || 0) === nextLevelId) return null
+
+  await client.query(
+    'UPDATE worker_users SET level_id = $1, updated_at = $2 WHERE id = $3',
+    [nextLevelId, now, workerId],
+  )
+  await client.query(
+    `
+      INSERT INTO worker_level_logs (
+        worker_id, from_level_id, to_level_id, reason, payload_json, created_at
+      ) VALUES ($1, $2, $3, 'auto', $4::jsonb, $5)
+    `,
+    [
+      workerId,
+      currentRow.level_id || null,
+      nextLevelId,
+      JSON.stringify({ acceptedCount }),
+      now,
+    ],
+  )
+  return getWorkerUserByIdWithClient(client, workerId)
+}
+
 export async function getWorkCategoryByKey(categoryKey: string): Promise<WorkCategoryRow | null> {
   const result = await query<WorkCategoryRow>(
     'SELECT * FROM work_categories WHERE category_key = $1 LIMIT 1',
@@ -1304,6 +1384,10 @@ export async function acceptWorkOrderAndSettle(input: {
       now: input.now,
     })
 
+    if (workerId > 0) {
+      await maybeUpgradeWorkerLevelWithClient(client, workerId, input.now)
+    }
+
     return getWorkOrderByIdWithClient(client, input.workOrderId)
   })
 }