feat(stats): add sentence search tab and fix mining card behavior

- Add Search tab with realtime subtitle sentence search, media context, and mining actions
- Persist library card size selection across reloads
- Fix selection text written only for sentence cards, not word/audio cards
- Fix word mining audio routed to SentenceAudio field when present
- Fix sentence card created immediately before slow media generation completes
- Fix Anki config resolved at request time for sentence mining
- Prefer non-Signs/Songs tracks when auto-selecting secondary subtitle language

stats/src/components/vocabulary/VocabularyTab.tsx

@@ -36,7 +36,6 @@ export function VocabularyTab({
 }: VocabularyTabProps) {
   const { words, kanji, knownWords, loading, error } = useVocabulary();
   const [selectedKanjiId, setSelectedKanjiId] = useState<number | null>(null);
-  const [search, setSearch] = useState('');
   const [hideNames, setHideNames] = useState(false);
   const [showExclusionManager, setShowExclusionManager] = useState(false);
 
@@ -116,14 +115,7 @@ export function VocabularyTab({
         />
       </div>
 
-      <div className="flex items-center gap-3">
-        <input
-          type="text"
-          value={search}
-          onChange={(e) => setSearch(e.target.value)}
-          placeholder="Search words..."
-          className="flex-1 bg-ctp-surface0 border border-ctp-surface1 rounded-lg px-3 py-2 text-sm text-ctp-text placeholder:text-ctp-overlay2 focus:outline-none focus:border-ctp-blue"
-        />
+      <div className="flex items-center justify-end gap-3">
         {hasNames && (
           <button
             type="button"
@@ -178,12 +170,7 @@ export function VocabularyTab({
         onSelectWord={handleSelectWord}
       />
 
-      <WordList
-        words={filteredWords}
-        selectedKey={null}
-        onSelectWord={handleSelectWord}
-        search={search}
-      />
+      <WordList words={filteredWords} selectedKey={null} onSelectWord={handleSelectWord} />
 
       <KanjiBreakdown
         kanji={kanji}

stats/src/components/vocabulary/WordDetailPanel.tsx

@@ -179,15 +179,15 @@ export function WordDetailPanel({
   };
 
   return (
-    <div className="fixed inset-0 z-40">
+    <div className="fixed inset-0 z-40 flex items-center justify-center p-4">
       <button
         type="button"
         aria-label="Close word detail panel"
         className="absolute inset-0 bg-ctp-crust/70 backdrop-blur-[2px]"
         onClick={onClose}
       />
-      <aside className="absolute right-0 top-0 h-full w-full max-w-xl border-l border-ctp-surface1 bg-ctp-mantle shadow-2xl">
-        <div className="flex h-full flex-col">
+      <aside className="relative flex max-h-[85vh] w-full max-w-xl flex-col overflow-hidden rounded-xl border border-ctp-surface1 bg-ctp-mantle shadow-2xl">
+        <div className="flex min-h-0 flex-1 flex-col">
           <div className="flex items-start justify-between border-b border-ctp-surface1 px-5 py-4">
             <div className="min-w-0">
               <div className="text-xs uppercase tracking-[0.18em] text-ctp-overlay1">

stats/src/components/vocabulary/pos-helpers.tsx

@@ -22,7 +22,7 @@ export function posColor(pos: string): string {
 
 export function PosBadge({ pos }: { pos: string }) {
   return (
-    <span className={`rounded-full px-2 py-0.5 text-[11px] font-medium ${posColor(pos)}`}>
+    <span className={`rounded-full px-2 py-0.5 text-[11px] font-medium whitespace-nowrap ${posColor(pos)}`}>
       {pos.replace(/_/g, ' ')}
     </span>
   );