perf(web-ui): cap health chat request timeout

Author: ymkiux

tests/unit/agents-modal-guards.test.mjs

@@ -388,7 +388,8 @@ test('sendHealthCheckDialogMessage appends transcript and clears prompt after su
         action: 'provider-chat-check',
         params: {
             name: 'alpha',
-            prompt: 'say ok'
+            prompt: 'say ok',
+            timeoutMs: 10000
         }
     }]);
     assert.strictEqual(context.healthCheckDialogPrompt, '');

web-ui/modules/app.methods.codex-config.mjs

@@ -456,7 +456,8 @@ export function createCodexConfigMethods(options = {}) {
             try {
                 const res = await api('provider-chat-check', {
                     name: provider,
-                    prompt
+                    prompt,
+                    timeoutMs: 10000
                 });
                 this.healthCheckDialogLastResult = res;