fix: add custom timeout for the Duo Chat webview

Description

before	after

This is a temporary fix for when the Duo Chat webview fails to load within 10s for legitimate reasons (e.g. slow machine)

I took the route of undocumented gitlab.webviewTimeoutSeconds config because we are planning o depercating the VS Code Duo Chat soon add I wanted to make this setting to go away we remove the legacy code.

Related Issues

Resolves Configure Timeout Time on VSCode Webview Startup (#1826 - closed)

How has this been tested?

Set "gitlab.webviewTimeoutSeconds": 20, in your settings

See 2025-03-28T13:36:54:825 [info]: Setting Duo Chat webview timeout to 20000ms in logs.

You can also apply this patch and test that without the 20s setting, the chat crashes

diff --git i/webviews/vue2/gitlab_duo_chat/src/App.vue w/webviews/vue2/gitlab_duo_chat/src/App.vue
index 84403db9..f650d40f 100644
--- i/webviews/vue2/gitlab_duo_chat/src/App.vue
+++ w/webviews/vue2/gitlab_duo_chat/src/App.vue
@@ -47,7 +47,8 @@ export default {
     window.vsCodeApi = vscode;
     window.addEventListener('message', this.handleExtensionMessageEvent);
     console.log('Duo Chat Vue app component is reporting as ready');
-    window.vsCodeApi.postMessage({ command: 'appReady' });
+    setTimeout(() =>
+    window.vsCodeApi.postMessage({ command: 'appReady' }), 15000);
     console.log('Duo Chat Vue app component reported as ready');
   },
   onBeforeDestroy() {

Screenshots (if appropriate)

What CHANGELOG entry will this MR create?

• fix: Bug fix fixes - a user-facing issue in production - included in changelog
• feature: New feature - a user-facing change which adds functionality - included in changelog
• BREAKING CHANGE: (fix or feature that would cause existing functionality to change) - should bump major version, mentioned in the changelog
• None - other non-user-facing changes