diff --git a/apps/backend/src/db/migrations/016_worker_display_name_unique.sql b/apps/backend/src/db/migrations/016_worker_display_name_unique.sql
new file mode 100644
index 00000000..b3b2819c
--- /dev/null
+++ b/apps/backend/src/db/migrations/016_worker_display_name_unique.sql
@@ -0,0 +1,15 @@
+-- 打手昵称唯一：昵称作为登录凭证之一，需全局唯一。
+-- 存量空昵称账号用账号名兜底（冲突时保持空昵称，不参与唯一约束）。
+
+UPDATE worker_users
+SET display_name = username
+WHERE display_name = ''
+  AND NOT EXISTS (
+    SELECT 1 FROM worker_users other
+    WHERE other.display_name = worker_users.username
+      AND other.id <> worker_users.id
+  );
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_worker_users_display_name_unique
+  ON worker_users (display_name)
+  WHERE display_name <> '';
diff --git a/apps/backend/src/repositories/worker-platform/worker-repo.ts b/apps/backend/src/repositories/worker-platform/worker-repo.ts
index 40d0f0ea..75b4619a 100644
--- a/apps/backend/src/repositories/worker-platform/worker-repo.ts
+++ b/apps/backend/src/repositories/worker-platform/worker-repo.ts
@@ -126,6 +126,16 @@ export async function getWorkerUserByPhone(phone: string): Promise<WorkerUserRow
   return result.rows[0] || null
 }
 
+export async function getWorkerUserByDisplayName(
+  displayName: string,
+): Promise<WorkerUserRow | null> {
+  const result = await query<WorkerUserRow>(
+    `${WORKER_USER_SELECT} WHERE wu.display_name = $1 LIMIT 1`,
+    [String(displayName || '').trim()],
+  )
+  return result.rows[0] || null
+}
+
 export async function getWorkerUserByInviteCode(
   inviteCode: string,
 ): Promise<WorkerUserRow | null> {
diff --git a/apps/backend/src/services/worker-platform/admin-service.ts b/apps/backend/src/services/worker-platform/admin-service.ts
index ef56a514..fd4e08ec 100644
--- a/apps/backend/src/services/worker-platform/admin-service.ts
+++ b/apps/backend/src/services/worker-platform/admin-service.ts
@@ -34,6 +34,7 @@ import {
   getWorkOrderById,
   getWorkOrderByOrderItemId,
   getWorkOrderShare,
+  getWorkProductRuleByKey,
   grabWorkOrder,
   incrementWorkerSessionVersion,
   joinWorkOrderShare,
@@ -260,11 +261,19 @@ export async function saveAdminWorkProductRule(payload: JsonObject = {}) {
         : 0
       : normalizeAmountFen(payload.requiredDepositAmount ?? payload.requiredDepositAmountYuan, 0)
   const fields = normalizeRequirementFieldsFromPayload(payload)
+  const ruleKey = normalizeSlugKey(
+    payload.ruleKey || payload.rule_key || skuCode || productName,
+    `rule-${Date.now()}`,
+  )
+  const ruleId = normalizeOptionalId(payload.ruleId ?? payload.rule_id)
+  if (!ruleId && (await getWorkProductRuleByKey(ruleKey))) {
+    throw createHttpError('规则标识已存在，请更换后重试', {
+      statusCode: 409,
+      errorCode: 'work_product_rule_key_taken',
+    })
+  }
   const rule = await upsertWorkProductRule({
-    ruleKey: normalizeSlugKey(
-      payload.ruleKey || payload.rule_key || skuCode || productName,
-      `rule-${Date.now()}`,
-    ),
+    ruleKey,
     provider: String(payload.provider || '').trim(),
     platform: String(payload.platform || '').trim(),
     shopId: String(payload.shopId || payload.shop_id || '').trim(),
diff --git a/apps/backend/src/services/worker-platform/worker-service.ts b/apps/backend/src/services/worker-platform/worker-service.ts
index fd44bf73..516d7e20 100644
--- a/apps/backend/src/services/worker-platform/worker-service.ts
+++ b/apps/backend/src/services/worker-platform/worker-service.ts
@@ -36,6 +36,7 @@ import {
   getWorkerUserById,
   getWorkerUserByPhone,
   getWorkerUserByUsername,
+  getWorkerUserByDisplayName,
   getWorkOrderById,
   getWorkOrderByOrderItemId,
   getWorkOrderShare,
@@ -248,6 +249,13 @@ export async function registerWorker(payload: JsonObject = {}) {
     })
   }
 
+  if (await getWorkerUserByDisplayName(displayName)) {
+    throw createHttpError('该昵称已被使用，请更换昵称', {
+      statusCode: 409,
+      errorCode: 'worker_display_name_taken',
+    })
+  }
+
   const defaults = await ensureWorkerPlatformDefaults()
   const now = nowIso()
   const created = await createWorkerUser({
@@ -327,7 +335,10 @@ export async function loginWorker(username: unknown, password: unknown) {
     })
   }
 
-  const worker = await getWorkerUserByUsername(normalizedUsername)
+  const worker =
+    (await getWorkerUserByUsername(normalizedUsername)) ||
+    (await getWorkerUserByPhone(normalizedUsername)) ||
+    (await getWorkerUserByDisplayName(normalizedUsername))
   if (!worker || !verifyWorkerPassword(normalizedPassword, worker.password_hash)) {
     throw createHttpError('账号或密码错误', {
       statusCode: 401,
diff --git a/apps/frontend/src/pages/admin/panels/ProductRulesPanel.tsx b/apps/frontend/src/pages/admin/panels/ProductRulesPanel.tsx
index 1598d9d2..33168169 100644
--- a/apps/frontend/src/pages/admin/panels/ProductRulesPanel.tsx
+++ b/apps/frontend/src/pages/admin/panels/ProductRulesPanel.tsx
@@ -102,6 +102,7 @@ export default function ProductRulesPanel() {
   })
 
   async function saveRule(values: {
+    ruleId?: number
     ruleKey: string
     provider?: string
     platform?: string
@@ -124,7 +125,10 @@ export default function ProductRulesPanel() {
     autoCreate?: boolean
   }) {
     try {
-      await saveAdminWorkProductRule(values)
+      await saveAdminWorkProductRule({
+        ...values,
+        ruleId: editingRule?.ruleId,
+      })
       message.success(editingRule ? '物品规则已更新' : '物品规则已创建')
       resetRuleForm()
       await Promise.all([
@@ -346,7 +350,23 @@ export default function ProductRulesPanel() {
             <Form.Item
               label="规则标识"
               name="ruleKey"
-              rules={[{ required: true, message: '请输入规则标识' }]}
+              rules={[
+                { required: true, message: '请输入规则标识' },
+                {
+                  validator: (_, value) => {
+                    const key = String(value || '').trim()
+                    if (
+                      !editingRule &&
+                      (rulesQuery.data?.data.items || []).some(
+                        (rule) => rule.ruleKey === key,
+                      )
+                    ) {
+                      return Promise.reject(new Error('规则标识已存在，请更换'))
+                    }
+                    return Promise.resolve()
+                  },
+                },
+              ]}
             >
               <Input placeholder="skin-training" disabled={Boolean(editingRule)} />
             </Form.Item>
diff --git a/apps/frontend/src/pages/worker/WorkerLoginPage.tsx b/apps/frontend/src/pages/worker/WorkerLoginPage.tsx
index 87b8cefa..1027bf76 100644
--- a/apps/frontend/src/pages/worker/WorkerLoginPage.tsx
+++ b/apps/frontend/src/pages/worker/WorkerLoginPage.tsx
@@ -167,15 +167,19 @@ export default function WorkerLoginPage() {
                     <>
                       <div className="auth-form-header">
                         <h1>欢迎回来</h1>
-                        <p>使用账号或手机号登录，进入抢单大厅</p>
+                        <p>使用手机号、昵称或账号登录，进入抢单大厅</p>
                       </div>
                       <Form layout="vertical" onFinish={submitLogin} requiredMark={false}>
                         <Form.Item
-                          label="账号 / 手机号"
+                          label="手机号 / 昵称 / 账号"
                           name="username"
-                          rules={[{ required: true, message: '请输入账号或手机号' }]}
+                          rules={[{ required: true, message: '请输入手机号、昵称或账号' }]}
                         >
-                          <Input prefix={<UserOutlined />} autoComplete="username" />
+                          <Input
+                            prefix={<UserOutlined />}
+                            autoComplete="username"
+                            placeholder="手机号 / 昵称 / 账号"
+                          />
                         </Form.Item>
                         <Form.Item
                           label="密码"
@@ -252,6 +256,7 @@ export default function WorkerLoginPage() {
                           label="昵称"
                           name="displayName"
                           rules={[{ required: true, message: '请输入昵称' }]}
+                          extra="昵称需唯一，注册后可作为登录账号使用"
                         >
                           <Input prefix={<UserOutlined />} />
                         </Form.Item>
diff --git a/apps/frontend/src/services/admin/worker-platform.ts b/apps/frontend/src/services/admin/worker-platform.ts
index a7e78b21..a3bfa3dd 100644
--- a/apps/frontend/src/services/admin/worker-platform.ts
+++ b/apps/frontend/src/services/admin/worker-platform.ts
@@ -87,6 +87,7 @@ export function fetchAdminWorkProductRules(params?: Record<string, unknown>) {
 }
 
 export function saveAdminWorkProductRule(payload: {
+  ruleId?: number
   ruleKey: string
   provider?: string
   platform?: string