fix: audio tree structure, filter i18n, and IconSelect for filter options

Restructure audio tree nav into Capture (Sources + Engine Templates)
and Processed (Sources + Filter Templates) subgroups.
Add missing i18n description keys for all 11 audio filters.
Wrap plain select filter options with IconSelect grids.

server/src/wled_controller/static/js/core/filter-list.ts

@@ -202,9 +202,11 @@ export class FilterListManager {
                         const gridAttr = hasPaletteColors ? ` data-palette-grid="${escapeHtml(JSON.stringify(filteredChoices))}"` : '';
                         const isTemplateRef = opt.key === 'template_id';
                         const entityAttr = isTemplateRef ? ' data-entity-select="template"' : '';
+                        const isPlainSelect = !hasPaletteColors && !isTemplateRef;
+                        const iconGridAttr = isPlainSelect ? ' data-icon-grid="true"' : '';
                         html += `<div class="pp-filter-option">
                             <label for="${inputId}"><span>${escapeHtml(opt.label)}:</span></label>
-                            <select id="${inputId}"${gridAttr}${entityAttr}
+                            <select id="${inputId}"${gridAttr}${entityAttr}${iconGridAttr}
                                 onchange="${updateFn}(${index}, '${opt.key}', this.value)">
                                 ${options}
                             </select>
@@ -235,6 +237,7 @@ export class FilterListManager {
         });
 
         container.innerHTML = html;
+        this._enhanceIconGridSelects(container);
         if (this._initDrag) {
             this._initDrag(this._containerId, filtersArr, () => this.render());
         }
@@ -243,6 +246,33 @@ export class FilterListManager {
         }
     }
 
+    /**
+     * Wrap plain select-type filter options with IconSelect grids.
+     * Called after render() sets innerHTML.
+     */
+    private _enhanceIconGridSelects(container: HTMLElement) {
+        const selects = container.querySelectorAll<HTMLSelectElement>('select[data-icon-grid]');
+        selects.forEach(sel => {
+            const items: { value: string; icon: string; label: string }[] = [];
+            for (const option of Array.from(sel.options)) {
+                if (!option.value) continue;
+                items.push({
+                    value: option.value,
+                    icon: `<svg class="icon" viewBox="0 0 24 24">${P.wrench}</svg>`,
+                    label: option.textContent || option.value,
+                });
+            }
+            if (items.length > 0) {
+                new IconSelect({
+                    target: sel,
+                    items,
+                    columns: Math.min(items.length, 3),
+                    onChange: () => { sel.dispatchEvent(new Event('change')); },
+                });
+            }
+        });
+    }
+
     /**
      * Add a filter from the select element into the filters array.
      */

server/src/wled_controller/static/js/features/streams.ts

@@ -636,10 +636,20 @@ function renderPictureSourcesList(streams: any) {
         {
             key: 'audio_group', icon: getAudioSourceIcon('capture'), titleKey: 'tree.group.audio',
             children: [
-                { key: 'audio_capture', titleKey: 'audio_source.group.capture', icon: getAudioSourceIcon('capture'), count: captureSources.length },
+                {
-                { key: 'audio_processed', titleKey: 'audio_source.group.processed', icon: getAudioSourceIcon('processed'), count: processedAudioSources.length },
+                    key: 'audio_capture_group', icon: getAudioSourceIcon('capture'), titleKey: 'tree.group.audio_capture',
-                { key: 'audio_templates', titleKey: 'tree.leaf.templates', icon: ICON_AUDIO_TEMPLATE, count: _cachedAudioTemplates.length },
+                    children: [
-                { key: 'audio_processing', titleKey: 'tree.leaf.processing_templates', icon: ICON_AUDIO_TEMPLATE, count: audioProcessingTemplates.length },
+                        { key: 'audio_capture', titleKey: 'tree.leaf.sources', icon: getAudioSourceIcon('capture'), count: captureSources.length },
+                        { key: 'audio_templates', titleKey: 'tree.leaf.engine_templates', icon: ICON_AUDIO_TEMPLATE, count: _cachedAudioTemplates.length },
+                    ]
+                },
+                {
+                    key: 'audio_processed_group', icon: getAudioSourceIcon('processed'), titleKey: 'tree.group.audio_processed',
+                    children: [
+                        { key: 'audio_processed', titleKey: 'tree.leaf.sources', icon: getAudioSourceIcon('processed'), count: processedAudioSources.length },
+                        { key: 'audio_processing', titleKey: 'tree.leaf.filter_templates', icon: ICON_AUDIO_TEMPLATE, count: audioProcessingTemplates.length },
+                    ]
+                },
             ]
         },
         {

server/src/wled_controller/static/locales/en.json

@@ -550,6 +550,17 @@
   "filters.contrast.desc": "Adjust image contrast around mid-gray",
   "filters.temporal_blur": "Temporal Blur",
   "filters.temporal_blur.desc": "Smooth color transitions over time",
+  "filters.audio_filter_template.desc": "Embed another audio processing template",
+  "filters.channel_extract.desc": "Select mono, left, or right channel",
+  "filters.band_extract.desc": "Filter to bass, mid, treble, or custom frequency range",
+  "filters.peak_hold.desc": "Retain peak values with configurable decay",
+  "filters.gain.desc": "Amplify or attenuate signal levels",
+  "filters.envelope_follower.desc": "Smooth amplitude with attack/release times",
+  "filters.spectral_smoothing.desc": "Extra smoothing on spectrum data over time",
+  "filters.compressor.desc": "Reduce dynamic range above threshold",
+  "filters.inverter.desc": "Invert all levels (1 minus value)",
+  "filters.beat_gate.desc": "Pass signal only around detected beats",
+  "filters.delay.desc": "Time-shift the audio analysis by a delay",
   "postprocessing.description_label": "Description (optional):",
   "postprocessing.description_placeholder": "Describe this template...",
   "postprocessing.created": "Template created successfully",
@@ -1408,6 +1419,8 @@
   "tree.group.processing": "Processed",
   "tree.group.strip": "Color Strip",
   "tree.group.audio": "Audio",
+  "tree.group.audio_capture": "Capture",
+  "tree.group.audio_processed": "Processed",
   "tree.group.integrations": "Integrations",
   "tree.group.utility": "Utility",
   "tree.leaf.sources": "Sources",

server/src/wled_controller/static/locales/ru.json

@@ -1311,6 +1311,8 @@
   "tree.group.processing": "Обработанные",
   "tree.group.strip": "Цветовые полосы",
   "tree.group.audio": "Аудио",
+  "tree.group.audio_capture": "Захват",
+  "tree.group.audio_processed": "Обработка",
   "tree.group.utility": "Утилиты",
   "tree.leaf.sources": "Источники",
   "tree.leaf.engine_templates": "Шаблоны движка",

server/src/wled_controller/static/locales/zh.json

@@ -1311,6 +1311,8 @@
   "tree.group.processing": "已处理",
   "tree.group.strip": "色带",
   "tree.group.audio": "音频",
+  "tree.group.audio_capture": "采集",
+  "tree.group.audio_processed": "处理",
   "tree.group.utility": "工具",
   "tree.leaf.sources": "源",
   "tree.leaf.engine_templates": "引擎模板",