feat(core): bind request services and implement registered tasks

Wire plugin services through Bind/InjectFrom and AppContext so HTTP and
workers resolve dependencies after Apply. Register TaskHandler objects
with persisted results, and implement send_email_code, mail:send,
cleanup_inactive_users, and dispatch_bot_msg.

backend/docs/docs.go

@@ -5925,6 +5925,17 @@ const docTemplate = `{
                     "user"
                 ],
                 "summary": "发送邮箱验证码",
+                "parameters": [
+                    {
+                        "description": "目标邮箱",
+                        "name": "request",
+                        "in": "body",
+                        "required": true,
+                        "schema": {
+                            "$ref": "#/definitions/user.sendEmailCodeRequest"
+                        }
+                    }
+                ],
                 "responses": {
                     "200": {
                         "description": "发送成功",
@@ -5937,6 +5948,12 @@ const docTemplate = `{
                         "schema": {
                             "$ref": "#/definitions/response.Any"
                         }
+                    },
+                    "500": {
+                        "description": "发送失败",
+                        "schema": {
+                            "$ref": "#/definitions/response.Any"
+                        }
                     }
                 }
             }
@@ -8047,6 +8064,17 @@ const docTemplate = `{
                 }
             }
         },
+        "user.sendEmailCodeRequest": {
+            "type": "object",
+            "required": [
+                "email"
+            ],
+            "properties": {
+                "email": {
+                    "type": "string"
+                }
+            }
+        },
         "user.updateProfileRequest": {
             "type": "object",
             "properties": {

backend/docs/swagger.json

@@ -5918,6 +5918,17 @@
                     "user"
                 ],
                 "summary": "发送邮箱验证码",
+                "parameters": [
+                    {
+                        "description": "目标邮箱",
+                        "name": "request",
+                        "in": "body",
+                        "required": true,
+                        "schema": {
+                            "$ref": "#/definitions/user.sendEmailCodeRequest"
+                        }
+                    }
+                ],
                 "responses": {
                     "200": {
                         "description": "发送成功",
@@ -5930,6 +5941,12 @@
                         "schema": {
                             "$ref": "#/definitions/response.Any"
                         }
+                    },
+                    "500": {
+                        "description": "发送失败",
+                        "schema": {
+                            "$ref": "#/definitions/response.Any"
+                        }
                     }
                 }
             }
@@ -8040,6 +8057,17 @@
                 }
             }
         },
+        "user.sendEmailCodeRequest": {
+            "type": "object",
+            "required": [
+                "email"
+            ],
+            "properties": {
+                "email": {
+                    "type": "string"
+                }
+            }
+        },
         "user.updateProfileRequest": {
             "type": "object",
             "properties": {

backend/docs/swagger.yaml

@@ -1363,6 +1363,13 @@ definitions:
     - password
     - username
     type: object
+  user.sendEmailCodeRequest:
+    properties:
+      email:
+        type: string
+    required:
+    - email
+    type: object
   user.updateProfileRequest:
     properties:
       avatar_url:
@@ -4937,6 +4944,13 @@ paths:
       consumes:
       - application/json
       description: 向指定邮箱发送验证码（用于注册场景）
+      parameters:
+      - description: 目标邮箱
+        in: body
+        name: request
+        required: true
+        schema:
+          $ref: '#/definitions/user.sendEmailCodeRequest'
       produces:
       - application/json
       responses:
@@ -4948,6 +4962,10 @@ paths:
           description: 参数错误
           schema:
             $ref: '#/definitions/response.Any'
+        "500":
+          description: 发送失败
+          schema:
+            $ref: '#/definitions/response.Any'
       summary: 发送邮箱验证码
       tags:
       - user