feat(config): 更新系统配置默认值和文档说明

- 将 allowCustomChannel 默认值从 false 改为 true
- 修改 allowCustomChannel 字段类型为指针类型以支持默认值设置
- 更新相关文档中对 allowCustomChannel 功能的描述
- 修复画布页面中对话框节点打开逻辑，避免文本节点意外触发编辑对话框
- 将用户配置中的渠道模式默认值从 remote 改为 local

web/src/app/(admin)/admin/settings/page.tsx

@@ -32,7 +32,7 @@ const emptySettings: AdminSettings = {
       defaultImageModel: "",
       defaultTextModel: "",
       systemPrompt: "",
-      allowCustomChannel: false,
+      allowCustomChannel: true,
     },
   },
   private: { channels: [] },

web/src/app/(user)/canvas/[id]/canvas-client-page.tsx

@@ -488,7 +488,7 @@ function InfiniteCanvasPage() {
     setConnections((prev) => [...prev, { id: nanoid(), ...connection }]);
     setSelectedNodeIds(new Set([newNode.id]));
     setSelectedConnectionId(null);
-    setDialogNodeId(newNode.id);
+    if (type !== CanvasNodeType.Text) setDialogNodeId(newNode.id);
     setPendingConnectionCreate(null);
     setConnecting(null);
   }, [effectiveConfig.imageModel, effectiveConfig.model, effectiveConfig.size, message, setConnecting]);
@@ -598,7 +598,7 @@ function InfiniteCanvasPage() {
       setNodes((prev) => [...prev, newNode]);
       setSelectedNodeIds(new Set([newNode.id]));
       setSelectedConnectionId(null);
-      setDialogNodeId(newNode.id);
+      if (type !== CanvasNodeType.Text) setDialogNodeId(newNode.id);
     },
     [effectiveConfig.imageModel, effectiveConfig.model, effectiveConfig.size, getCanvasCenter],
   );
@@ -1782,7 +1782,6 @@ function InfiniteCanvasPage() {
     setNodes((prev) => [...prev, node]);
     setSelectedNodeIds(new Set([node.id]));
     setSelectedConnectionId(null);
-    setDialogNodeId(node.id);
   }, [screenToCanvas, size.height, size.width]);
 
   const handleAssetInsert = useCallback((payload: InsertAssetPayload) => {

web/src/stores/use-config-store.ts

@@ -24,7 +24,7 @@ export type AiConfig = {
 export const CONFIG_STORE_KEY = "infinite-canvas:ai_config_store";
 
 export const defaultConfig: AiConfig = {
-  channelMode: "remote",
+  channelMode: "local",
   baseUrl: "https://api.openai.com",
   apiKey: "",
   model: "gpt-image-2",