Replace profile targets with scene activation and searchable scene selector

Profiles now activate scene presets instead of individual targets, with
configurable deactivation behavior (none/revert/fallback scene). The
target checklist UI is replaced by a searchable combobox for scene
selection that scales well with many scenes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/static/js/app.js

@@ -79,7 +79,7 @@ import {
 import {
     loadProfiles, openProfileEditor, closeProfileEditorModal,
     saveProfileEditor, addProfileCondition,
-    toggleProfileEnabled, toggleProfileTargets, deleteProfile,
+    toggleProfileEnabled, deleteProfile,
     expandAllProfileSections, collapseAllProfileSections,
 } from './features/profiles.js';
 import {
@@ -307,7 +307,6 @@ Object.assign(window, {
     saveProfileEditor,
     addProfileCondition,
     toggleProfileEnabled,
-    toggleProfileTargets,
     deleteProfile,
     expandAllProfileSections,
     collapseAllProfileSections,