feat: 添加公开内容相关API接口及测试用例

backend/docs/swagger.yaml

@@ -2675,6 +2675,122 @@ paths:
       summary: 我的订单详情（当前租户）
       tags:
       - Tenant
+  /t/{tenantCode}/v1/public/contents:
+    get:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: Keyword filters by title keyword (LIKE).
+        in: query
+        name: keyword
+        type: string
+      - description: Limit is page size; only values in {10,20,50,100} are accepted
+          (otherwise defaults to 10).
+        in: query
+        name: limit
+        type: integer
+      - description: Page is 1-based page index; values <= 0 are normalized to 1.
+        in: query
+        name: page
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            allOf:
+            - $ref: '#/definitions/requests.Pager'
+            - properties:
+                items:
+                  $ref: '#/definitions/dto.ContentItem'
+              type: object
+      summary: 公开内容列表（已发布 + public）
+      tags:
+      - TenantPublic
+  /t/{tenantCode}/v1/public/contents/{contentID}:
+    get:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: ContentID
+        format: int64
+        in: path
+        name: contentID
+        required: true
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/dto.ContentDetail'
+      summary: 公开内容详情（已发布 + public）
+      tags:
+      - TenantPublic
+  /t/{tenantCode}/v1/public/contents/{contentID}/assets:
+    get:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: ContentID
+        format: int64
+        in: path
+        name: contentID
+        required: true
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/dto.ContentAssetsResponse'
+      summary: 获取公开正片资源（main role；免费/作者/已购）
+      tags:
+      - TenantPublic
+  /t/{tenantCode}/v1/public/contents/{contentID}/preview:
+    get:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: ContentID
+        format: int64
+        in: path
+        name: contentID
+        required: true
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/dto.ContentAssetsResponse'
+      summary: 获取公开试看资源（preview role）
+      tags:
+      - TenantPublic
 securityDefinitions:
   BasicAuth:
     type: basic