refactor: 文件行数超标拆解（7个文件→14个文件，全部≤200行）

- 移动本地接口定义到 interfaces.go 和 admin/interfaces.go
- favorite_controller.go → favorite_item_controller.go
- space_controller.go → space_loaders.go
- settings_controller.go → settings_api_audit.go
- admin_energy_controller.go → admin_energy_api_controller.go
- admin_post_controller.go → admin_post_action_controller.go
- comment_repo.go → comment_mention_repo.go
- post_repo.go → post_stats_repo.go

internal/controller/settings_api_audit.go

@@ -0,0 +1,28 @@
+package controller
+
+import (
+	"net/http"
+
+	"metazone.cc/metalab/internal/common"
+
+	"github.com/gin-gonic/gin"
+)
+
+// AuditStatus 查询当前用户的待审核类型（需登录）
+func (sc *SettingsController) AuditStatus(c *gin.Context) {
+	uid, exists := c.Get("uid")
+	if !exists {
+		common.Error(c, http.StatusUnauthorized, "请先登录")
+		return
+	}
+
+	types, err := sc.auditService.GetPendingTypes(uid.(uint))
+	if err != nil {
+		common.Ok(c, gin.H{"pending_types": []string{}})
+		return
+	}
+	if types == nil {
+		types = []string{}
+	}
+	common.Ok(c, gin.H{"pending_types": types})
+}