fix: open external links in VS Code runtime

Route shared URL opening through VS Code host instead of webview window APIs
Add a VS Code runtime URL-open API and bridge handler using vscode.env.openExternal
Keep shared URL helper behavior unchanged for desktop and web

packages/vscode/src/bridge.ts

@@ -3139,6 +3139,21 @@ export async function handleBridgeMessage(message: BridgeRequest, ctx?: BridgeCo
         }
       }
 
+      case 'vscode:openExternalUrl': {
+        const { url } = (payload || {}) as { url?: string };
+        const target = typeof url === 'string' ? url.trim() : '';
+        if (!target) {
+          return { id, type, success: false, error: 'URL is required' };
+        }
+        try {
+          await vscode.env.openExternal(vscode.Uri.parse(target));
+          return { id, type, success: true, data: { opened: true } };
+        } catch (error) {
+          const errorMessage = error instanceof Error ? error.message : String(error);
+          return { id, type, success: false, error: errorMessage };
+        }
+      }
+
       case 'notifications:can-notify': {
         return { id, type, success: true, data: true };
       }

packages/vscode/webview/api/bridge.ts

@@ -138,6 +138,10 @@ export async function executeVSCodeCommand(command: string, args?: unknown[]): P
   return sendBridgeMessage<{ result?: unknown }>('vscode:command', { command, args });
 }
 
+export async function openVSCodeExternalUrl(url: string): Promise<void> {
+  await sendBridgeMessage('vscode:openExternalUrl', { url });
+}
+
 type CommandHandler = (payload: unknown) => void;
 const commandHandlers = new Map<string, CommandHandler>();
 

packages/vscode/webview/api/vscode.ts

@@ -1,5 +1,5 @@
 import type { VSCodeAPI } from '@openchamber/ui/lib/api/types';
-import { executeVSCodeCommand } from './bridge';
+import { executeVSCodeCommand, openVSCodeExternalUrl } from './bridge';
 
 export const createVSCodeActionsAPI = (): VSCodeAPI => ({
   async executeCommand(command: string, ...args: unknown[]): Promise<unknown> {
@@ -10,4 +10,8 @@ export const createVSCodeActionsAPI = (): VSCodeAPI => ({
   async openAgentManager(): Promise<void> {
     await executeVSCodeCommand('openchamber.openAgentManager');
   },
+
+  async openExternalUrl(url: string): Promise<void> {
+    await openVSCodeExternalUrl(url);
+  },
 });