feat: typed script parameters with validation and icon-grid selector

- Add ScriptParameterConfig model (string, integer, float, boolean, select types)
- Server-side validation at both define-time and execute-time
- Parameters passed as SCRIPT_PARAM_* environment variables
- Web UI parameter editor in script create/edit dialog (add/remove/reorder)
- Icon-grid selector component (ported from wled-screen-controller)
- Replace audio device dropdown with icon-grid selector
- Replace callback event dropdown with icon-grid selector
- Localization for parameter UI (en, ru)

media_server/static/js/player.js

@@ -13,6 +13,7 @@ import {
 } from './core.js';
 import { updateBackgroundColors } from './background.js';
 import { loadDisplayMonitors } from './links.js';
+import { IconSelect } from './icon-select.js';
 
 // Tab management
 export let activeTab = 'player';
@@ -422,6 +423,8 @@ function renderVisualizerFrame() {
 }
 
 // Audio device selection
+let _audioDeviceIconSelect = null;
+
 export async function loadAudioDevices() {
     const section = document.getElementById('audioDeviceSection');
     const select = document.getElementById('audioDeviceSelect');
@@ -466,6 +469,22 @@ export async function loadAudioDevices() {
             }
         }
 
+        // Enhance with icon grid
+        const audioSvg = '<svg viewBox="0 0 24 24" fill="currentColor"><path d="M3 9v6h4l5 5V4L7 9H3zm13.5 3A4.5 4.5 0 0 0 14 8.5v7a4.5 4.5 0 0 0 2.5-3.5z"/></svg>';
+        const items = [
+            { value: '', icon: audioSvg, label: t('settings.audio.auto') },
+            ...devices.map(dev => ({ value: dev.name, icon: audioSvg, label: dev.name })),
+        ];
+        if (_audioDeviceIconSelect) _audioDeviceIconSelect.destroy();
+        _audioDeviceIconSelect = new IconSelect({
+            target: select,
+            items,
+            columns: 1,
+            horizontal: true,
+            onChange: () => onAudioDeviceChanged(),
+        });
+        _audioDeviceIconSelect.setValue(select.value, false);
+
         updateAudioDeviceStatus(status);
     } catch (e) {
         section.style.display = 'none';