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/shared/window/animated_scrollwindow.py

@@ -63,7 +63,7 @@ class AnimatedScrollable(ScrolledWindow):
     def animate_size(self, height: int = -1):
         if not self.animate:
             idle_add(lambda: self.snap_to_size(height))
-            return
+            return None
         self._last_req = height
         current_val = self.height_animator.value
         return self.do_animate(current_val, height)