增加渲染节点功能，优化工具操作和样式

src/components/chat/ChatToolCallBlock.tsx

@@ -131,6 +131,12 @@ const TOOL_META: Record<string, ToolMeta> = {
     actionLabel: "显示",
     color: "#73c0de",
   },
+  render_junctions: {
+    label: "渲染节点",
+    icon: <LocationOnRounded sx={{ fontSize: 18 }} />,
+    actionLabel: "应用渲染",
+    color: "#3b82f6",
+  },
 };
 
 /* ---------- helpers ---------- */
@@ -261,6 +267,14 @@ function getToolDescription(toolCall: ToolCall): string {
     case "show_chart": {
       return (params.title as string | undefined) ?? "数据图表";
     }
+    case "render_junctions": {
+      const nodeAreaMap =
+        params.node_area_map && typeof params.node_area_map === "object"
+          ? (params.node_area_map as Record<string, unknown>)
+          : {};
+      const areaIds = Array.isArray(params.area_ids) ? params.area_ids : [];
+      return `${Object.keys(nodeAreaMap).length} 个节点 · ${areaIds.length || new Set(Object.values(nodeAreaMap).map(String)).size} 个分区`;
+    }
     default:
       return "";
   }
@@ -383,6 +397,31 @@ function buildAction(toolCall: ToolCall): ChatToolAction | null {
         xAxisName: params.x_axis_name as string | undefined,
         yAxisName: params.y_axis_name as string | undefined,
       };
+    case "render_junctions": {
+      const nodeAreaMap =
+        params.node_area_map && typeof params.node_area_map === "object"
+          ? Object.fromEntries(
+              Object.entries(params.node_area_map as Record<string, unknown>)
+                .map(([key, value]) => [String(key), String(value ?? "")])
+                .filter(([, value]) => value.trim().length > 0),
+            )
+          : {};
+      return {
+        type: "render_junctions",
+        nodeAreaMap,
+        areaIds: Array.isArray(params.area_ids)
+          ? params.area_ids.map((item) => String(item).trim()).filter(Boolean)
+          : [],
+        areaColors:
+          params.area_colors && typeof params.area_colors === "object"
+            ? Object.fromEntries(
+                Object.entries(params.area_colors as Record<string, unknown>)
+                  .map(([key, value]) => [String(key), String(value ?? "")])
+                  .filter(([, value]) => value.trim().length > 0),
+              )
+            : {},
+      };
+    }
     default:
       return null;
   }