fix: prevent bundled OpenCode self-upgrades (#2525)

* fix: prevent bundled OpenCode self-upgrades

* feat(vscode): support OpenCode upgrades

* fix: refresh OpenCode update status on runtime switch

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/vscode/webview/main.tsx

@@ -993,6 +993,17 @@ const handleLocalApiRequest = async (input: RequestInfo | URL, url: URL, init: R
     });
   }
 
+  if (pathname === '/api/opencode/upgrade-status' && method === 'GET') {
+    const data = await sendBridgeMessage('api:opencode/upgrade-status');
+    return jsonResponse(data);
+  }
+
+  if (pathname === '/api/opencode/upgrade' && method === 'POST') {
+    const body = await extractJsonBody(input, init, method);
+    const result = await sendBridgeMessage<{ status: number; body: unknown }>('api:opencode/upgrade', body);
+    return jsonResponse(result.body, result.status);
+  }
+
   if (pathname === '/api/zen/models' && method === 'GET') {
     try {
       const data = await sendBridgeMessage('api:zen:models');