Split the monolithic ScreenCapture service into focused Screenshot and
ScreenRecorder services behind a pluggable capture backend.
- Add shared/capture.py: CaptureBackend abstraction + HyprlandCaptureBackend
(hyprshot/grim/slurp/wf-recorder) and reusable CaptureNotifier
- Add services/screenshot.py and services/screenrecorder.py with Fabric
properties/signals; recording state kept in memory (no /tmp files)
- Keep services/screencapture.py as a backwards-compatible facade so
existing widgets and signals keep working
- Resolve monitors via Hyprland IPC helpers in services/modus.py instead of
spawning `hyprctl monitors -j` per capture
- Implement real window recording (slurp window boxes) and split the
record-window / record-region UI mappings
- Register screenshot_service / screen_recorder_service singletons
- Remove dead src/utils/inhibit.py duplicate; minor modus.lua quoting fix
- Replace commented-out launcher shortcuts with active screen capture and keyboard layout switcher.
- Update keybinding logic to use new method signatures.