新增调用前端分区渲染功能，节点通过 ref 文件传输，并增加简单认证

.opencode/tools/render_junctions.ts

@@ -0,0 +1,16 @@
+import { tool } from "@opencode-ai/plugin";
+
+export default tool({
+  description: "在前端地图上对 junctions 图层应用分区渲染。",
+  args: {
+    reason: tool.schema
+      .string()
+      .describe("Why this junction rendering action is needed for the user request."),
+    render_ref: tool.schema
+      .string()
+      .describe("Reference to a stored junction rendering payload resolved by the Agent service."),
+  },
+  async execute() {
+    return "已在地图上应用节点分区渲染。";
+  },
+});