feat(playlists): improve smart playlist editing and localization

Open smart playlist editing from playlist cards, load rules via Navidrome single-playlist API with safer fallbacks, and keep edit visibility aligned with ownership rules.
Also add/clean smart playlist locale keys across all supported languages and preserve smarter autogenerated naming behavior.

src/locales/en.ts

@@ -1319,8 +1319,6 @@ export const enTranslation = {
     csvImportDownloadError: 'Failed to download report',
   },
   smartPlaylists: {
-    title: 'Smart Playlists',
-    empty: 'No smart playlists yet.',
     sectionBasic: '1. Basic',
     sectionGenres: '2. Genres',
     sectionYearsAndFilters: '3. Years and filters',
@@ -1334,7 +1332,6 @@ export const enTranslation = {
     yearModeInclude: 'Include range',
     yearModeExclude: 'Exclude range',
     name: 'Name (without prefix)',
-    anyGenre: 'Any genre',
     limit: 'Limit',
     limitHint: 'How many tracks to include in playlist (1-{{max}}, usually 50).',
     artistContains: 'Artist contains…',
@@ -1348,13 +1345,13 @@ export const enTranslation = {
     excludeUnrated: 'Exclude unrated tracks',
     compilationOnly: 'Only compilations',
     create: 'New Smart Playlist',
+    save: 'Save Smart Playlist',
     created: 'Created {{name}}',
+    updated: 'Updated {{name}}',
     createFailed: 'Could not create smart playlist.',
-    deleted: 'Deleted {{name}}',
-    deleteFailed: 'Could not delete smart playlist.',
+    updateFailed: 'Could not update smart playlist.',
     navidromeOnly: 'Smart playlists can only be created on Navidrome servers.',
     loadFailed: 'Could not load smart playlists from Navidrome.',
-    liveBadge: 'live',
     sortRandom: 'Sort: random',
     sortTitleAsc: 'Sort: title A-Z',
     sortTitleDesc: 'Sort: title Z-A',