feat(api): add model delete, pagination, and cors config

internal/api/handler.go

@@ -369,12 +369,19 @@ func (h *Handler) CreateModel(c *gin.Context) {
 // @Tags         admin
 // @Produce      json
 // @Security     AdminAuth
+// @Param        page    query     int     false  "page (1-based)"
+// @Param        limit   query     int     false  "limit (default 50, max 200)"
+// @Param        search  query     string  false  "search by name/kind"
 // @Success      200  {array}   model.Model
 // @Failure      500  {object}  gin.H
 // @Router       /admin/models [get]
 func (h *Handler) ListModels(c *gin.Context) {
 	var models []model.Model
-	if err := h.db.Find(&models).Error; err != nil {
+	q := h.db.Model(&model.Model{}).Order("id desc")
+	query := parseListQuery(c)
+	q = applyListSearch(q, query.Search, "name", "kind")
+	q = applyListPagination(q, query)
+	if err := q.Find(&models).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list models", "details": err.Error()})
 		return
 	}
@@ -457,6 +464,45 @@ func (h *Handler) UpdateModel(c *gin.Context) {
 	c.JSON(http.StatusOK, existing)
 }
 
+// DeleteModel godoc
+// @Summary      Delete a model
+// @Description  Delete a model by id
+// @Tags         admin
+// @Produce      json
+// @Security     AdminAuth
+// @Param        id   path      int  true  "Model ID"
+// @Success      200  {object}  gin.H
+// @Failure      400  {object}  gin.H
+// @Failure      404  {object}  gin.H
+// @Failure      500  {object}  gin.H
+// @Router       /admin/models/{id} [delete]
+func (h *Handler) DeleteModel(c *gin.Context) {
+	idParam := c.Param("id")
+	id, err := strconv.Atoi(idParam)
+	if err != nil || id <= 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid id"})
+		return
+	}
+
+	var existing model.Model
+	if err := h.db.First(&existing, id).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "model not found"})
+		return
+	}
+
+	if err := h.db.Delete(&existing).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to delete model", "details": err.Error()})
+		return
+	}
+
+	if err := h.sync.SyncModelDelete(&existing); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to sync model delete", "details": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"status": "deleted"})
+}
+
 // SyncSnapshot godoc
 // @Summary      Force sync snapshot
 // @Description  Force full synchronization of DB state to Redis