feat(ECR-042): OpsCMS FeedSlot 薄写面

Admin POST/PUT 复用 admin.cms.write；C 端 GET /home/feed-slots；首页无 active 槽隐藏推荐区、失败回退展示；无新 migration。

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

apps/api/internal/handler/home.go

@@ -21,6 +21,7 @@ func (h *HomeHandler) Register(api *gin.RouterGroup) {
 	g := api.Group("/home")
 	g.GET("/tools", h.Tools)
 	g.GET("/banners", h.Banners)
+	g.GET("/feed-slots", h.FeedSlots)
 	g.GET("/daily-tips", h.DailyTips)
 }
 
@@ -46,6 +47,16 @@ func (h *HomeHandler) Banners(c *gin.Context) {
 	response.OK(c, gin.H{"items": items})
 }
 
+func (h *HomeHandler) FeedSlots(c *gin.Context) {
+	placement := c.DefaultQuery("placement", "home")
+	items, err := h.Svc.ListPublicFeedSlots(c.Request.Context(), placement)
+	if err != nil {
+		response.Fail(c, http.StatusInternalServerError, 50049, "home feed slots failed")
+		return
+	}
+	response.OK(c, gin.H{"items": items})
+}
+
 func (h *HomeHandler) DailyTips(c *gin.Context) {
 	uid, _ := middleware.UserIDFromContext(c)
 	tips, err := h.Svc.DailyTips(c.Request.Context(), uid)