feat(render+admin): delete render node

- render-svc: DELETE /v1/nodes/:node_id (store.DeleteNode + handler + route)
- admin: حذف button per node row + DELETE /api/admin/nodes/[nodeId] proxy

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/render/cmd/server/main.go

@@ -119,6 +119,7 @@ func main() {
 		nodes.POST("", nodeH.Create)
 		nodes.GET("/:node_id", nodeH.Get)
 		nodes.PATCH("/:node_id", nodeH.Patch)
+		nodes.DELETE("/:node_id", nodeH.Delete)
 		nodes.POST("/:node_id/restart", nodeH.Restart)
 		nodes.POST("/:node_id/release", nodeH.Release)
 		nodes.POST("/:node_id/close-ae", nodeH.CloseAE)

services/render/internal/db/db.go

@@ -145,6 +145,12 @@ func (s *Store) PatchNode(ctx context.Context, id uuid.UUID, req *models.NodePat
 	return s.GetNodeByID(ctx, id)
 }
 
+// DeleteNode permanently removes a render node.
+func (s *Store) DeleteNode(ctx context.Context, id uuid.UUID) error {
+	_, err := s.pool.Exec(ctx, `DELETE FROM render.render_nodes WHERE id = $1`, id)
+	return err
+}
+
 func (s *Store) UpdateNodeHeartbeat(ctx context.Context, nodeID uuid.UUID, req *models.NodeHeartbeatRequest) error {
 	_, err := s.pool.Exec(ctx, `
 		UPDATE render.render_nodes SET

services/render/internal/handlers/nodes.go

@@ -107,6 +107,20 @@ func (h *NodeHandler) Release(c *gin.Context) {
 	c.Status(http.StatusNoContent)
 }
 
+// DELETE /v1/nodes/:node_id
+func (h *NodeHandler) Delete(c *gin.Context) {
+	nodeID, err := uuid.Parse(c.Param("node_id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, models.APIError{Code: "bad_request", Message: "invalid node_id"})
+		return
+	}
+	if err := h.store.DeleteNode(c.Request.Context(), nodeID); err != nil {
+		c.JSON(http.StatusInternalServerError, models.APIError{Code: "internal_error", Message: err.Error()})
+		return
+	}
+	c.Status(http.StatusNoContent)
+}
+
 // POST /v1/nodes/:node_id/close-ae — Stub: signals the node agent to kill AE process
 func (h *NodeHandler) CloseAE(c *gin.Context) {
 	_, err := uuid.Parse(c.Param("node_id"))