fix: strengthen --no-git deprecation test assertions

Add assertions unique to the --no-git message ('will be removed',
'git extension will no longer be enabled by default') to prevent
false positives from the --ai deprecation panel.

Author: mnriem

tests/integrations/test_cli.py

@@ -470,6 +470,8 @@ def test_no_git_emits_deprecation_warning(self, tmp_path):
         assert "deprecated" in normalized_output
         assert "0.10.0" in normalized_output
         assert "specify extension" in normalized_output
+        assert "will be removed" in normalized_output
+        assert "git extension will no longer be enabled by default" in normalized_output
 
     def test_git_extension_commands_registered(self, tmp_path):
         """Git extension commands are registered with the agent during init."""