Refactor: multi-page dashboard, Glide icon loading, and UI fixes
- Refactored settings into a multi-page dashboard (Appearance, Interaction, Handle, Tools).
- Replaced slow, synchronous PackageManager icon loading with Glide.
- Implemented a custom AppIconModelLoader for seamless Icon Pack support in Glide.
- Added a fast in-memory cache for system default icons.
- Implemented a BroadcastReceiver to instantly refresh icons upon app install/uninstall.
- Improved FloatingPanelService touch interception for reliable outside clicks.
- Restored original Support Development button styling.
- Standardized Accessibility Icon to native Android Material Vector with internal padding.
- Refined Hero App Icon design with invisible circular mask.
- Added Xiaomi/MIUI/HyperOS specific intent fallback for accessibility settings.
- Cleaned up unused PNGs and custom XMLs.
- Fixed back arrow direction in sub-settings.
- Implemented sequential dismissal: closes keyboard -> picker -> panel.
- Added gitignore for local build logs and FDroid metadata.