refactor: update loading state management and enhance search functionality in ExercisesListPage

- Replaced loading state with listFetching for clearer intent in managing exercise list fetching.
- Introduced search title suggestions for improved user experience during exercise searches.
- Updated UI elements to reflect changes in loading states and added datalist for search inputs, enhancing usability.
- Adjusted text for loading indicators to provide a more localized experience.

frontend/src/pages/ExercisesListPage.jsx

@@ -34,7 +34,7 @@ function ExercisesListPage() {
     skills: [],
   })
   const [catalogsReady, setCatalogsReady] = useState(false)
-  const [loading, setLoading] = useState(true)
+  const [listFetching, setListFetching] = useState(false)
   const [loadingMore, setLoadingMore] = useState(false)
   const [offset, setOffset] = useState(0)
   const [hasMore, setHasMore] = useState(false)
@@ -222,6 +222,12 @@ function ExercisesListPage() {
     statusOptions,
   ])
 
+  /** Für Browser-/datalist-Vorschläge (aktuelle Treffer-Titel, begrenzt) */
+  const searchTitleSuggestions = useMemo(() => {
+    const titles = exercises.map((e) => (e.title || '').trim()).filter(Boolean)
+    return [...new Set(titles)].slice(0, 80)
+  }, [exercises])
+
   const queryBase = useMemo(() => {
     const q = {}
     const n = (v) => (v === '' || v == null ? undefined : Number(v))
@@ -284,7 +290,7 @@ function ExercisesListPage() {
     if (!catalogsReady) return
     let cancelled = false
     const run = async () => {
-      setLoading(true)
+      setListFetching(true)
       setOffset(0)
       try {
         const batch = await api.listExercises({ ...queryBase, limit: PAGE_SIZE, offset: 0 })
@@ -298,7 +304,7 @@ function ExercisesListPage() {
           alert('Fehler beim Laden: ' + err.message)
         }
       } finally {
-        if (!cancelled) setLoading(false)
+        if (!cancelled) setListFetching(false)
       }
     }
     run()
@@ -334,11 +340,11 @@ function ExercisesListPage() {
 
   const resetAllFilters = useCallback(() => setFilters({ ...INITIAL_FILTERS }), [])
 
-  if (!catalogsReady || loading) {
+  if (!catalogsReady) {
     return (
       <div style={{ padding: '2rem', textAlign: 'center' }}>
         <div className="spinner"></div>
-        <p>Laden...</p>
+        <p>Lade Kataloge…</p>
       </div>
     )
   }
@@ -363,13 +369,21 @@ function ExercisesListPage() {
 
       <div className="card exercise-search-bar" style={{ marginBottom: '12px' }}>
         <label className="form-label">Volltextsuche (Titel, Ziel, …)</label>
+        <datalist id="exercise-search-titles">
+          {searchTitleSuggestions.map((t) => (
+            <option key={t} value={t} />
+          ))}
+        </datalist>
         <input
           type="search"
           className="form-input"
           placeholder="Suchbegriffe…"
           value={searchInput}
           onChange={(e) => setSearchInput(e.target.value)}
-          autoComplete="off"
+          autoComplete="on"
+          name="exercise-fulltext-search"
+          list="exercise-search-titles"
+          enterKeyHint="search"
           style={{ marginBottom: '10px' }}
         />
         <label className="form-label">Ergänzende Suche / KI-Vorbereitung (Beta)</label>
@@ -379,7 +393,10 @@ function ExercisesListPage() {
           placeholder="zweiter Begriff — zusätzliche Volltextsuche (ODER)"
           value={aiSearchInput}
           onChange={(e) => setAiSearchInput(e.target.value)}
-          autoComplete="off"
+          autoComplete="on"
+          name="exercise-ai-search"
+          list="exercise-search-titles"
+          enterKeyHint="search"
         />
         <div className="exercise-search-bar__actions">
           <button type="button" className="btn btn-secondary exercise-filter-trigger" onClick={() => setFilterModalOpen(true)}>
@@ -416,7 +433,8 @@ function ExercisesListPage() {
           </div>
         ) : null}
         <p style={{ fontSize: '12px', color: 'var(--text3)', marginTop: '10px', marginBottom: 0 }}>
-          Vereins-/Trainerfilter folgen später. Fachliche Filter über „Filter“ – zwischen Feldern UND, Auswahl mehrerer Werte je Feld mit ODER.
+          Trefferliste aktualisiert sich kurz nach Eingabe. Titel der aktuellen Liste erscheinen als Vorschläge (Pfeil im
+          Feld). Fachliche Filter über „Filter“ – zwischen Feldern UND, Auswahl mehrerer Werte je Feld mit ODER.
         </p>
       </div>
 
@@ -584,7 +602,12 @@ function ExercisesListPage() {
         </div>
       )}
 
-      {exercises.length === 0 ? (
+      {listFetching && exercises.length === 0 ? (
+        <div className="card" style={{ textAlign: 'center', padding: '2rem' }}>
+          <div className="spinner"></div>
+          <p style={{ color: 'var(--text2)', marginTop: '12px' }}>Lade Übungen…</p>
+        </div>
+      ) : exercises.length === 0 ? (
         <div className="card">
           <p style={{ color: 'var(--text2)', textAlign: 'center' }}>
             Keine Übungen gefunden.
@@ -592,6 +615,9 @@ function ExercisesListPage() {
         </div>
       ) : (
         <>
+          {listFetching ? (
+            <p style={{ fontSize: '13px', color: 'var(--text3)', marginBottom: '8px' }}>Aktualisiere Treffer…</p>
+          ) : null}
           <p style={{ fontSize: '13px', color: 'var(--text2)', marginBottom: '10px' }}>
             {exercises.length} angezeigt
             {hasMore ? ' · es gibt weitere Einträge' : ''}