refactor: 文件行数超标拆解（Service + Controller 9/16 完成）

- Service 层：energy_service → energize/operations/admin/query 四文件
- Service 层：post_service → helpers/audit + 核心 CRUD 保留
- Service 层：favorite_service → items + 核心文件夹操作保留
- Service 层：auth_service → password + 核心注册/登录保留
- Service 层：notification_service → notify + 核心列表/已读保留
- Service 层：audit_service → review + 核心列表/详情保留
- Controller 层：studio_controller → page/write/api/post_api/action 五文件
- Controller 层：post_controller → page/api/upload 三文件
- Controller 层：comment_controller → list/write/action/upload 四文件
- 清理未使用导入（notification_service.go 移除 fmt）

internal/controller/studio_api_controller.go

@@ -0,0 +1,54 @@
+package controller
+
+import (
+	"net/http"
+	"strconv"
+
+	"metazone.cc/metalab/internal/common"
+
+	"github.com/gin-gonic/gin"
+)
+
+// OverviewAPI 创作中心数据概览
+func (ctrl *StudioController) OverviewAPI(c *gin.Context) {
+	uid, _, ok := common.GetGinUser(c)
+	if !ok {
+		common.Error(c, http.StatusUnauthorized, "请先登录")
+		return
+	}
+
+	overview, err := ctrl.postService.GetOverview(uid)
+	if err != nil {
+		common.Error(c, http.StatusInternalServerError, "获取数据失败")
+		return
+	}
+
+	common.Ok(c, overview)
+}
+
+// ListPostsAPI 我的帖子列表（支持状态筛选）
+func (ctrl *StudioController) ListPostsAPI(c *gin.Context) {
+	uid, _, ok := common.GetGinUser(c)
+	if !ok {
+		common.Error(c, http.StatusUnauthorized, "请先登录")
+		return
+	}
+
+	status := c.Query("status")
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+
+	posts, total, err := ctrl.postService.ListByUser(uid, status, page, pageSize)
+	if err != nil {
+		common.Error(c, http.StatusInternalServerError, "获取列表失败")
+		return
+	}
+
+	common.Ok(c, gin.H{
+		"items":       posts,
+		"total":       total,
+		"page":        page,
+		"page_size":   pageSize,
+		"total_pages": common.PageCount(total, pageSize),
+	})
+}