style: enforce consistent codestyle via ruff config and auto-fixes

- Configure ruff: isort, pyupgrade, bugbear, flake8 rules
- Auto-fix import sorting, redundant parens, exception chaining
- Remove from __future__ import annotations (Python 3.13+)
- Convert debug print() to logger calls
- Fix typo applicaiton → application in icon_resolver
- Remove bare returns in animator setters
- Move TYPE_CHECKING imports to runtime where used at runtime

src/services/modus.py

@@ -50,7 +50,7 @@ def __getattr__(name):
 def get_notification_service():
     import sys
 
-    return getattr(sys.modules[__name__], "notification_service")
+    return sys.modules[__name__].notification_service
 
 
 class ModusService(Service):