feat(ECR-011): 昵称、首页贴士与档案 Self 唯一/合盘交叉校验

每账号仅一条 self（migration 40902）；合盘只选 TA；账号昵称可改；首页穿衣/颜色/养生贴士。

Co-authored-by: Cursor <cursoragent@cursor.com>

proto/openapi.yaml

@@ -41,6 +41,29 @@ paths:
         '200':
           description: OK
 
+  /api/v1/auth/me:
+    get:
+      tags: [system]
+      summary: Current account
+      responses:
+        '200':
+          description: OK
+    patch:
+      tags: [system]
+      summary: Update account nickname
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [nickname]
+              properties:
+                nickname: { type: string, maxLength: 16 }
+      responses:
+        '200':
+          description: OK
+
   /api/v1/admin/auth/login:
     post:
       tags: [admin]
@@ -393,6 +416,17 @@ paths:
         '200':
           description: OK
 
+  /api/v1/home/daily-tips:
+    get:
+      tags: [system]
+      summary: Homepage self-card daily tips (clothing / colors / wellness)
+      description: >
+        Uses self profile birth + local time hexagram seed and DeepSeek when configured.
+        Falls back to local tips without LLM or birth profile. DeviceAuth required.
+      responses:
+        '200':
+          description: OK
+
   /api/v1/admin/home/tools:
     get:
       tags: [admin]
@@ -477,8 +511,8 @@ paths:
                   - type: object
                     properties:
                       data: { $ref: '#/components/schemas/Profile' }
-
-  /api/v1/profiles/{id}:
+        '409':
+          description: Second self profile (code 40902)
     patch:
       tags: [profile]
       summary: 更新个人档案