fix(codex): improve web rendering for Codex events (#544)

* test(codex): add web event rendering harness

* fix(codex): surface plan updates in web

* fix(codex): render MCP tool calls in web

* fix(codex): improve terminal and context display

* fix(codex): format token usage events

* fix(codex): show status context in web

* fix(codex): preserve tool result errors

cli/src/codex/utils/appServerConfig.test.ts

@@ -115,6 +115,8 @@ describe('appServerConfig', () => {
         expect(params.input).toEqual([{ type: 'text', text: 'hello' }]);
         expect(params.approvalPolicy).toBe('never');
         expect(params.sandboxPolicy).toEqual({ type: 'readOnly' });
+        expect(params.effort).toBe('high');
+        expect(params.summary).toBe('detailed');
         expect(params.collaborationMode).toEqual({
             mode: 'default',
             settings: {