ClearChat Home v1.5.0 RC1 Patch

Focus: final Home release polish.

Changes:
- Bumped version to 1.5.0-rc1-home.
- Improved Settings Center spacing and quick-link layout.
- Added active sidebar navigation state.
- Improved Hybrid/Dark theme polish.
- Cleaned color palette selected-state display.
- Improved Update page spacing and version display.
- Improved mobile admin layout behavior.

Protected files remain untouched by the updater.
