feat: entity picker for HA light mapping — searchable EntitySelect for light entities

Replaces plain text input with EntitySelect dropdown that fetches
available light.* entities from the selected HA source. Changing the
HA source refreshes the entity list across all mapping rows.

server/src/wled_controller/static/js/features/ha-light-targets.ts

@@ -7,7 +7,7 @@ import { fetchWithAuth, escapeHtml } from '../core/api.ts';
 import { t } from '../core/i18n.ts';
 import { Modal } from '../core/modal.ts';
 import { showToast, showConfirm } from '../core/ui.ts';
-import { ICON_CLONE, ICON_EDIT, ICON_START, ICON_STOP } from '../core/icons.ts';
+import { ICON_CLONE, ICON_EDIT, ICON_START, ICON_STOP, ICON_TRASH } from '../core/icons.ts';
 import * as P from '../core/icon-paths.ts';
 import { EntitySelect } from '../core/entity-palette.ts';
 import { wrapCard } from '../core/card-colors.ts';
@@ -22,7 +22,9 @@ const _icon = (d: string) => `<svg class="icon" viewBox="0 0 24 24">${d}</svg>`;
 let _haLightTagsInput: TagInput | null = null;
 let _haSourceEntitySelect: EntitySelect | null = null;
 let _cssSourceEntitySelect: EntitySelect | null = null;
+let _mappingEntitySelects: EntitySelect[] = [];
 let _editorCssSources: any[] = [];
+let _cachedHAEntities: any[] = [];  // fetched from selected HA source
 
 class HALightEditorModal extends Modal {
     constructor() { super('ha-light-editor-modal'); }
@@ -31,6 +33,7 @@ class HALightEditorModal extends Modal {
         if (_haLightTagsInput) { _haLightTagsInput.destroy(); _haLightTagsInput = null; }
         if (_haSourceEntitySelect) { _haSourceEntitySelect.destroy(); _haSourceEntitySelect = null; }
         if (_cssSourceEntitySelect) { _cssSourceEntitySelect.destroy(); _cssSourceEntitySelect = null; }
+        _destroyMappingEntitySelects();
     }
 
     snapshotValues() {
@@ -48,12 +51,17 @@ class HALightEditorModal extends Modal {
 
 const haLightEditorModal = new HALightEditorModal();
 
+function _destroyMappingEntitySelects(): void {
+    for (const es of _mappingEntitySelects) es.destroy();
+    _mappingEntitySelects = [];
+}
+
 function _getMappingsJSON(): string {
     const rows = document.querySelectorAll('#ha-light-mappings-list .ha-light-mapping-row');
     const mappings: any[] = [];
     rows.forEach(row => {
         mappings.push({
-            entity_id: (row.querySelector('.ha-mapping-entity') as HTMLInputElement).value.trim(),
+            entity_id: (row.querySelector('.ha-mapping-entity') as HTMLSelectElement).value.trim(),
             led_start: parseInt((row.querySelector('.ha-mapping-led-start') as HTMLInputElement).value) || 0,
             led_end: parseInt((row.querySelector('.ha-mapping-led-end') as HTMLInputElement).value) || -1,
             brightness_scale: parseFloat((row.querySelector('.ha-mapping-brightness') as HTMLInputElement).value) || 1.0,
@@ -62,36 +70,134 @@ function _getMappingsJSON(): string {
     return JSON.stringify(mappings);
 }
 
+function _getEntityItems() {
+    return _cachedHAEntities
+        .filter((e: any) => e.domain === 'light')
+        .map((e: any) => ({
+            value: e.entity_id,
+            label: e.friendly_name || e.entity_id,
+            icon: _icon(P.lightbulb),
+            desc: e.state || '',
+        }));
+}
+
+async function _fetchHAEntities(haSourceId: string): Promise<void> {
+    if (!haSourceId) { _cachedHAEntities = []; return; }
+    try {
+        const resp = await fetchWithAuth(`/home-assistant/sources/${haSourceId}/entities`);
+        if (!resp.ok) { _cachedHAEntities = []; return; }
+        const data = await resp.json();
+        _cachedHAEntities = data.entities || [];
+    } catch {
+        _cachedHAEntities = [];
+    }
+}
+
+function _rebuildMappingEntityOptions(): void {
+    // Update all existing mapping entity <select> elements with new options
+    const lightEntities = _cachedHAEntities.filter((e: any) => e.domain === 'light');
+    const rows = document.querySelectorAll('#ha-light-mappings-list .ha-light-mapping-row');
+    rows.forEach(row => {
+        const sel = row.querySelector('.ha-mapping-entity') as HTMLSelectElement;
+        if (!sel) return;
+        const currentVal = sel.value;
+        sel.innerHTML = `<option value="">${t('ha_light.mapping.select_entity')}</option>` +
+            lightEntities.map((e: any) =>
+                `<option value="${e.entity_id}" ${e.entity_id === currentVal ? 'selected' : ''}>${escapeHtml(e.friendly_name || e.entity_id)}</option>`
+            ).join('');
+        // Restore value if it was set but not in list
+        if (currentVal && !lightEntities.some((e: any) => e.entity_id === currentVal)) {
+            sel.innerHTML += `<option value="${escapeHtml(currentVal)}" selected>${escapeHtml(currentVal)}</option>`;
+        }
+    });
+    // Rebuild EntitySelect instances (destroy old, create new)
+    _destroyMappingEntitySelects();
+    rows.forEach(row => {
+        const sel = row.querySelector('.ha-mapping-entity') as HTMLSelectElement;
+        if (!sel) return;
+        const es = new EntitySelect({
+            target: sel,
+            getItems: _getEntityItems,
+            placeholder: t('ha_light.mapping.search_entity'),
+        });
+        _mappingEntitySelects.push(es);
+    });
+}
+
 // ── Mapping rows ──
 
 export function addHALightMapping(data: any = null): void {
     const list = document.getElementById('ha-light-mappings-list');
     if (!list) return;
 
+    const idx = list.querySelectorAll('.ha-light-mapping-row').length + 1;
     const row = document.createElement('div');
-    row.className = 'ha-light-mapping-row condition-fields';
+    row.className = 'ha-light-mapping-row';
+
+    // Build options from cached entities (light domain only)
+    const lightEntities = _cachedHAEntities.filter((e: any) => e.domain === 'light');
+    const selectedId = data?.entity_id || '';
+    const entityOptions = `<option value="">${t('ha_light.mapping.select_entity')}</option>` +
+        lightEntities.map((e: any) =>
+            `<option value="${e.entity_id}" ${e.entity_id === selectedId ? 'selected' : ''}>${escapeHtml(e.friendly_name || e.entity_id)}</option>`
+        ).join('');
+    // If editing and the entity isn't in the list (HA disconnected), add it manually
+    const hasSelected = !selectedId || lightEntities.some((e: any) => e.entity_id === selectedId);
+    const extraOption = (!hasSelected && selectedId)
+        ? `<option value="${escapeHtml(selectedId)}" selected>${escapeHtml(selectedId)}</option>`
+        : '';
+
     row.innerHTML = `
-        <div class="condition-field">
-            <label>${t('ha_light.mapping.entity_id')}</label>
-            <input type="text" class="ha-mapping-entity" value="${escapeHtml(data?.entity_id || '')}" placeholder="light.living_room">
+        <div class="ha-mapping-header">
+            <span class="ha-mapping-label">${_icon(P.lightbulb)} #${idx}</span>
+            <button type="button" class="btn-remove-mapping" onclick="removeHALightMapping(this)" title="${t('common.delete')}">${ICON_TRASH}</button>
         </div>
-        <div class="condition-field" style="display:flex; gap:0.5rem;">
-            <div style="flex:1">
-                <label>${t('ha_light.mapping.led_start')}</label>
-                <input type="number" class="ha-mapping-led-start" value="${data?.led_start ?? 0}" min="0" step="1">
+        <div class="ha-mapping-fields">
+            <div class="ha-mapping-field">
+                <label>${t('ha_light.mapping.entity_id')}</label>
+                <select class="ha-mapping-entity">${entityOptions}${extraOption}</select>
             </div>
-            <div style="flex:1">
-                <label>${t('ha_light.mapping.led_end')}</label>
-                <input type="number" class="ha-mapping-led-end" value="${data?.led_end ?? -1}" min="-1" step="1">
-            </div>
-            <div style="flex:1">
-                <label>${t('ha_light.mapping.brightness')}</label>
-                <input type="number" class="ha-mapping-brightness" value="${data?.brightness_scale ?? 1.0}" min="0" max="1" step="0.1">
+            <div class="ha-mapping-range-row">
+                <div>
+                    <label>${t('ha_light.mapping.led_start')}</label>
+                    <input type="number" class="ha-mapping-led-start" value="${data?.led_start ?? 0}" min="0" step="1">
+                </div>
+                <div>
+                    <label>${t('ha_light.mapping.led_end')}</label>
+                    <input type="number" class="ha-mapping-led-end" value="${data?.led_end ?? -1}" min="-1" step="1">
+                </div>
+                <div>
+                    <label>${t('ha_light.mapping.brightness')}</label>
+                    <input type="number" class="ha-mapping-brightness" value="${data?.brightness_scale ?? 1.0}" min="0" max="1" step="0.1">
+                </div>
             </div>
         </div>
-        <button type="button" class="btn btn-sm btn-danger ha-mapping-remove" onclick="this.closest('.ha-light-mapping-row').remove()">&times;</button>
     `;
     list.appendChild(row);
+
+    // Attach EntitySelect to the entity dropdown
+    const entitySelect = row.querySelector('.ha-mapping-entity') as HTMLSelectElement;
+    const es = new EntitySelect({
+        target: entitySelect,
+        getItems: _getEntityItems,
+        placeholder: t('ha_light.mapping.search_entity'),
+    });
+    _mappingEntitySelects.push(es);
+}
+
+export function removeHALightMapping(btn: HTMLElement): void {
+    const row = btn.closest('.ha-light-mapping-row');
+    if (!row) return;
+    // Find and destroy the EntitySelect for this row
+    const select = row.querySelector('.ha-mapping-entity') as HTMLSelectElement;
+    if (select) {
+        const idx = _mappingEntitySelects.findIndex(es => (es as any)._target === select || (es as any).target === select);
+        if (idx >= 0) {
+            _mappingEntitySelects[idx].destroy();
+            _mappingEntitySelects.splice(idx, 1);
+        }
+    }
+    row.remove();
 }
 
 // ── Show / Close ──
@@ -124,6 +230,7 @@ export async function showHALightEditor(targetId: string | null = null, cloneDat
     ).join('');
 
     // Clear mappings
+    _destroyMappingEntitySelects();
     document.getElementById('ha-light-mappings-list')!.innerHTML = '';
 
     let editData: any = null;
@@ -153,7 +260,10 @@ export async function showHALightEditor(targetId: string | null = null, cloneDat
         document.getElementById('ha-light-editor-transition-display')!.textContent = (editData.ha_transition ?? 0.5).toFixed(1);
         (document.getElementById('ha-light-editor-description') as HTMLInputElement).value = editData.description || '';
 
-        // Load mappings
+        // Fetch entities from the selected HA source before loading mappings
+        await _fetchHAEntities(editData.ha_source_id || '');
+
+        // Load mappings (with entity picker populated)
         const mappings = editData.ha_light_mappings || [];
         mappings.forEach((m: any) => addHALightMapping(m));
     } else {
@@ -163,6 +273,11 @@ export async function showHALightEditor(targetId: string | null = null, cloneDat
         (document.getElementById('ha-light-editor-transition') as HTMLInputElement).value = '0.5';
         document.getElementById('ha-light-editor-transition-display')!.textContent = '0.5';
         (document.getElementById('ha-light-editor-description') as HTMLInputElement).value = '';
+
+        // Fetch entities from the first HA source
+        const firstSource = haSources[0]?.id || '';
+        await _fetchHAEntities(firstSource);
+
         // Add one empty mapping by default
         addHALightMapping();
     }
@@ -176,6 +291,11 @@ export async function showHALightEditor(targetId: string | null = null, cloneDat
             desc: s.connected ? t('ha_source.connected') : t('ha_source.disconnected'),
         })),
         placeholder: t('palette.search'),
+        onChange: async (newSourceId: string) => {
+            // Refetch entities when HA source changes, then rebuild mapping selects
+            await _fetchHAEntities(newSourceId);
+            _rebuildMappingEntityOptions();
+        },
     });
 
     if (_cssSourceEntitySelect) { _cssSourceEntitySelect.destroy(); _cssSourceEntitySelect = null; }
@@ -373,3 +493,4 @@ window.saveHALightEditor = saveHALightEditor;
 window.editHALightTarget = editHALightTarget;
 window.cloneHALightTarget = cloneHALightTarget;
 window.addHALightMapping = addHALightMapping;
+window.removeHALightMapping = removeHALightMapping;