ClearChat Home v1.0.3 Palette Layout + Updater Restore - PATCH ONLY

Contains:
- admin/settings.php
- admin/update.php
- assets/css/admin.css
- includes/bootstrap.php

Fixes:
- Palette now uses compact two/three-column layout.
- Radio buttons sit directly next to each color swatch/name.
- Selected color is highlighted neatly.
- Restores/keeps the Update page link in the admin sidebar.
- Adds a safer patch ZIP uploader at admin/update.php.

Protected files not included:
- includes/config.php
- install/
- database/schema.sql
