feat(provider): support Codex subscriptions with ChatGPT sign-in (#2513)

* feat(provider): support Codex subscriptions with ChatGPT sign-in

* style: format Codex live integration test

* fix(provider): preserve Codex identity in temporary model tests

* fix(web): portal provider selector without dialog overflow

* fix(web): allow native scrolling in provider dropdown

* fix(provider): surface safe Codex quota and upstream errors

* fix(web): provide reliable Codex copy feedback in dialogs

* feat(provider): confirm cascade deletion from edit dialog

* fix(persistence): discard connections after failed commit

* fix(web): polish provider loading and confirmation motion

---------

Co-authored-by: dadachann <185672915+dadachann@users.noreply.github.com>

tests/unit_tests/core/test_e2e_coverage_config.py

@@ -0,0 +1,20 @@
+"""Keep subprocess coverage pointed at the generated E2E configuration."""
+
+from pathlib import Path
+from unittest.mock import Mock, patch
+
+from tests.e2e.utils.process_manager import LangBotProcess
+
+
+def test_e2e_coverage_environment_uses_generated_config(tmp_path):
+    process = Mock()
+    process.poll.return_value = None
+    project = tmp_path / 'project'
+    project.mkdir()
+    manager = LangBotProcess(project, tmp_path, collect_coverage=True)
+    with patch('subprocess.Popen', return_value=process) as popen, patch('httpx.get') as get:
+        get.return_value.status_code = 200
+        assert manager.start()
+    config = Path(popen.call_args.kwargs['env']['COVERAGE_PROCESS_START'])
+    assert config.is_file()
+    assert f'--rcfile={config}' in popen.call_args.args[0]