fix: resolve failing tests in main

- fix(api/dropbox): _require_admin bypasses auth when AUTH_ENABLED=False,
  fixing all 5 TestSaveDropboxSettings failures
- fix(api/onedrive): same AUTH_ENABLED bypass in _require_admin; fix one-arg
  update_env_file call using env_utils version for token rotation
- fix(auth): update login TemplateResponse to Starlette 1.0+ API
  (request as first arg instead of in context dict)
- fix(api/local_auth): update all TemplateResponse calls to Starlette 1.0+ API
- fix(views/share): update TemplateResponse call to Starlette 1.0+ API
- fix(api/billing): update TemplateResponse call to Starlette 1.0+ API
- fix(tests/test_imap_tasks): mock is_private_ip for tests using
  imap.example.com (unresolvable in sandboxed/CI environments)
- fix(tests): update TemplateResponse call_args assertions to new API
  (call_args.kwargs['context'] instead of call_args[0][1])
- fix(tests): update fake_original signatures in dark_mode tests

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
Agent-Logs-Url: https://github.com/christianlouis/DocuElevate/sessions/52d7b7b7-3a71-4a96-b2b1-b675b8a6d3b4

tests/test_auth.py

@@ -430,8 +430,8 @@ class TestLoginFunction:
             # Verify TemplateResponse was called with correct context
             mock_templates.TemplateResponse.assert_called_once()
             call_args = mock_templates.TemplateResponse.call_args
-            assert call_args[0][0] == "login.html"
-            context = call_args[0][1]
+            assert call_args[0][1] == "login.html"
+            context = call_args.kwargs["context"]
             assert context["error"] == "Test error"
             assert context["message"] == "Test message"
 
@@ -450,7 +450,7 @@ class TestLoginFunction:
 
             mock_templates.TemplateResponse.assert_called_once()
             call_args = mock_templates.TemplateResponse.call_args
-            context = call_args[0][1]
+            context = call_args.kwargs["context"]
             assert context["error"] is None
             assert context["message"] is None