fix(lint): LOG015 - replace root logger with module loggers

- Add _logger = logging.getLogger(__name__) to all modules
- Replace logging.X() calls with _logger.X() calls
- Remove logging.basicConfig() from module level (keep in run_bot())
- Add G004 to global ignores (f-strings in logging are more readable)
- Remove LOG015 and G004 per-file ignores from pyproject.toml
- Fix pytest_ignore_collect hook signature in conftest.py

screen_locker/screen_lock.py

@@ -11,7 +11,7 @@ import os
 import sys
 import tkinter as tk
 
-logging.basicConfig(level=logging.INFO)
+_logger = logging.getLogger(__name__)
 
 # Validation limits for workout data
 MAX_DISTANCE_KM = 100
@@ -34,7 +34,7 @@ class ScreenLocker:
 
         # Check if already logged today
         if self.has_logged_today():
-            logging.info("Workout already logged today. Skipping screen lock.")
+            _logger.info("Workout already logged today. Skipping screen lock.")
             sys.exit(0)
 
         self.root = tk.Tk()
@@ -663,7 +663,7 @@ class ScreenLocker:
             with open(self.log_file, "w") as f:
                 json.dump(logs, f, indent=2)
         except OSError as e:
-            logging.warning(f"Could not save workout log: {e}")
+            _logger.warning(f"Could not save workout log: {e}")
 
     def close(self) -> None:
         """Close the application and exit."""