fix(ui): icon updates, remove mic button, theme fixes

- LiveSearch: replace SlidersVertical with TextSearch for advanced search
- AlbumHeader: add Highlighter icon for artist bio button
- PlayerBar: remove unused lyrics/mic button
- components.css: album-detail-badge always opaque (accent bg, white text)
- theme: Middle Earth — remove sidebar stripes, fix queue/artist/bio contrast
- theme: Toy Tale — fix muted text, queue tabs, sidebar labels, divider
- theme: Tetrastack — brighten purple/blue palette, raise text-muted contrast
- theme: Horde & Alliance — remove repeating sidebar line pattern

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

src/components/PlayerBar.tsx

@@ -2,7 +2,7 @@ import React, { memo, useCallback, useEffect, useMemo, useRef, useState } from '
 import { createPortal } from 'react-dom';
 import {
   Play, Pause, SkipBack, SkipForward, Volume2, VolumeX, Music,
-  Square, Repeat, Repeat1, Maximize2, SlidersVertical, X, Heart, MicVocal, Cast
+  Square, Repeat, Repeat1, Maximize2, SlidersVertical, X, Heart, Cast
 } from 'lucide-react';
 import { usePlayerStore } from '../store/playerStore';
 import { useShallow } from 'zustand/react/shallow';
@@ -298,16 +298,6 @@ export default function PlayerBar() {
         )}
       </div>
 
-      {/* Lyrics Button */}
-      <button
-        className={`player-btn player-btn-sm ${activeTab === 'lyrics' && isQueueVisible ? 'active' : ''}`}
-        onClick={() => { if (!isQueueVisible) toggleQueue(); showLyrics(); }}
-        aria-label={t('player.lyrics')}
-        data-tooltip={t('player.lyrics')}
-      >
-        <MicVocal size={15} />
-      </button>
-
       {/* EQ Button */}
       <button
         className={`player-btn player-btn-sm player-eq-btn ${eqOpen ? 'active' : ''}`}