feat: UI color theming system with live preview, presets and server sync

- RGBA color picker with live preview (debounce 50ms)
- 30 preset colors + 12 theme presets (Ocean, Forest, Sunset, Royal, etc.)
- Header image selection from configurable image library
- Export/Import theme as JSON via clipboard
- CSS variable theming across all UI elements: NitroCard headers/tabs,
  context menus, buttons (primary/dark/gray), InfoStand, toolbar,
  room tools, purse, progress bars, sliders
- All elements use var(--name, fallback) for zero visual change when default
- Smooth 0.3s CSS transitions on theme change
- Server-side persistence via WebSocket (packets 10047/10048)
- Integrated Color/Image tabs into BackgroundsView panel
- All strings use LocalizeText() for i18n support
- Settings persisted in localStorage + server sync with 1s debounce
- Added react-colorful dependency

src/App.tsx

@@ -1,6 +1,6 @@
 import { GetAssetManager, GetAvatarRenderManager, GetCommunication, GetConfiguration, GetLocalizationManager, GetRoomEngine, GetRoomSessionManager, GetSessionDataManager, GetSoundManager, GetStage, GetTexturePool, GetTicker, HabboWebTools, LegacyExternalInterface, LoadGameUrlEvent, NitroLogger, NitroVersion, PrepareRenderer } from '@nitrots/nitro-renderer';
 import { FC, useEffect, useState } from 'react';
-import { GetUIVersion } from './api';
+import { GetUIVersion, UiSettingsProvider } from './api';
 import { Base } from './common';
 import { LoadingView } from './components/loading/LoadingView';
 import { MainView } from './components/MainView';
@@ -90,12 +90,14 @@ export const App: FC<{}> = props =>
     }, []);
 
     return (
-        <Base fit overflow="hidden" className={ !(window.devicePixelRatio % 1) && 'image-rendering-pixelated' }>
-            { !isReady &&
-                <LoadingView /> }
-            { isReady && <MainView /> }
-            <ReconnectView />
-            <Base id="draggable-windows-container" />
-        </Base>
+        <UiSettingsProvider>
+            <Base fit overflow="hidden" className={ !(window.devicePixelRatio % 1) && 'image-rendering-pixelated' }>
+                { !isReady &&
+                    <LoadingView /> }
+                { isReady && <MainView /> }
+                <ReconnectView />
+                <Base id="draggable-windows-container" />
+            </Base>
+        </UiSettingsProvider>
     );
 };