feat: implement real-time LED strip preview

- Add LED strip visualization around display previews
- Show real-time color status for each LED pixel
- Support multi-display LED strip configurations
- Use elegant 16px thin LED strip design
- Real-time LED color sync via WebSocket
- Responsive layout with display scaling support

src/components/displays/display-state-index.tsx

@@ -1,7 +1,7 @@
 import { Component, For, createEffect, createSignal } from 'solid-js';
 import { listen } from '@tauri-apps/api/event';
 import debug from 'debug';
-import { invoke } from '@tauri-apps/api';
+import { invoke } from '@tauri-apps/api/core';
 import { DisplayState, RawDisplayState } from '../../models/display-state.model';
 import { DisplayStateCard } from './display-state-card';