style: apply ruff-format to entire codebase

First-time run of ruff-format via pre-commit hook normalises quote
style, trailing commas, and whitespace across 188 Python files.
No logic changes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_config.py

@@ -1,7 +1,6 @@
 """Tests for configuration module."""
 
 
-
 class TestConfigEnvVars:
     """Tests for environment variable configuration."""
 
@@ -10,39 +9,41 @@ class TestConfigEnvVars:
         from config import DEBUG, HOST, PORT
 
         assert PORT == 5050
-        assert HOST == '0.0.0.0'
+        assert HOST == "0.0.0.0"
         assert DEBUG is False
 
     def test_env_override(self, monkeypatch):
         """Test that environment variables override defaults."""
-        monkeypatch.setenv('INTERCEPT_PORT', '8080')
-        monkeypatch.setenv('INTERCEPT_DEBUG', 'true')
+        monkeypatch.setenv("INTERCEPT_PORT", "8080")
+        monkeypatch.setenv("INTERCEPT_DEBUG", "true")
 
         # Re-import to get new values
         import importlib
 
         import config
+
         importlib.reload(config)
 
         assert config.PORT == 8080
         assert config.DEBUG is True
 
         # Reset
-        monkeypatch.delenv('INTERCEPT_PORT', raising=False)
-        monkeypatch.delenv('INTERCEPT_DEBUG', raising=False)
+        monkeypatch.delenv("INTERCEPT_PORT", raising=False)
+        monkeypatch.delenv("INTERCEPT_DEBUG", raising=False)
         importlib.reload(config)
 
     def test_invalid_env_values(self, monkeypatch):
         """Test that invalid env values fall back to defaults."""
-        monkeypatch.setenv('INTERCEPT_PORT', 'invalid')
+        monkeypatch.setenv("INTERCEPT_PORT", "invalid")
 
         import importlib
 
         import config
+
         importlib.reload(config)
 
         # Should fall back to default
         assert config.PORT == 5050
 
-        monkeypatch.delenv('INTERCEPT_PORT', raising=False)
+        monkeypatch.delenv("INTERCEPT_PORT", raising=False)
         importlib.reload(config)