feat: Typeahead-Vorschläge bei Volltextsuche (#11)

- GET /api/vorlagen/suggest?q= mit FTS5 Prefix-Matching
- Debounce 300ms, Top 7 Vorschläge mit Snippet
- Keyboard-Navigation (↑↓ Enter Escape)
- Klick/Enter → direkt zur Vorlage
- Enter ohne Auswahl → normale Filtersuche

backend/src/tracker/api/routes/vorlagen.py

@@ -29,6 +29,65 @@ def _db():
         conn.close()
 
 
+@router.get("/suggest")
+def suggest(q: str = Query("", min_length=2, max_length=200), conn=Depends(_db)):
+    """Typeahead suggestions using FTS5."""
+    has_fts = conn.execute(
+        "SELECT name FROM sqlite_master WHERE type='table' AND name='vorlagen_fts'"
+    ).fetchone()
+    if not has_fts or not q.strip():
+        return {"items": []}
+
+    # Build prefix query for typeahead (last word gets *)
+    words = q.strip().split()
+    parts = [f'"{w}"' for w in words[:-1]]
+    parts.append(f'"{words[-1]}"*')  # prefix match on last word
+    fts_query = " ".join(parts)
+
+    try:
+        rows = conn.execute(
+            """SELECT rowid,
+                   snippet(vorlagen_fts, 1, '<mark>', '</mark>', '…', 10) as snip
+                FROM vorlagen_fts
+                WHERE vorlagen_fts MATCH ?
+                ORDER BY rank
+                LIMIT 7""",
+            (fts_query,),
+        ).fetchall()
+    except Exception:
+        return {"items": []}
+
+    if not rows:
+        return {"items": []}
+
+    ids = [r["rowid"] for r in rows]
+    placeholders = ",".join("?" * len(ids))
+    vorlagen = conn.execute(
+        f"""SELECT id, aktenzeichen, betreff, typ
+            FROM vorlagen WHERE id IN ({placeholders})""",
+        ids,
+    ).fetchall()
+    v_map = {v["id"]: v for v in vorlagen}
+    snip_map = {r["rowid"]: r["snip"] for r in rows}
+
+    items = []
+    for rid in ids:
+        v = v_map.get(rid)
+        if v:
+            items.append({
+                "id": v["id"],
+                "aktenzeichen": v["aktenzeichen"],
+                "betreff": v["betreff"],
+                "typ": v["typ"],
+                "snippet": snip_map.get(rid, ""),
+            })
+
+    return {"items": items}
+
+
+
+
+
 @router.get("")
 def list_vorlagen(
     page: int = Query(1, ge=1),

frontend/src/lib/api.ts

@@ -204,6 +204,17 @@ export const reevalKette = (id: number, anmerkung: string) =>
 export const fetchJobStatus = (jobId: string) =>
 	get<{ status: string; result?: object; error?: string }>(`/bewertung/status/${jobId}`);
 
+export interface SuchVorschlag {
+	id: number;
+	aktenzeichen: string | null;
+	betreff: string | null;
+	typ: string | null;
+	snippet?: string;
+}
+
+export const fetchSuchvorschlaege = (q: string) =>
+	get<{ items: SuchVorschlag[] }>(`/vorlagen/suggest?q=${encodeURIComponent(q)}`);
+
 export const fetchFraktionen = () => get<{ id: number; kuerzel: string; name: string; farbe: string | null; anzahl: number }[]>('/fraktionen');
 export const fetchFraktionDashboard = (kuerzel: string, jahr?: string) => {
 	const params = jahr ? `?jahr=${jahr}` : '';

frontend/src/routes/vorlagen/+page.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
 	import { onMount } from 'svelte';
 	import { goto } from '$app/navigation';
-	import { fetchVorlagen, fetchFraktionen, type VorlageKurz, type Paginated } from '$lib/api';
+	import { fetchVorlagen, fetchFraktionen, fetchSuchvorschlaege, type VorlageKurz, type Paginated, type SuchVorschlag } from '$lib/api';
 	import { formatDate } from '$lib/status';
 
 	let data: Paginated<VorlageKurz & { antragsteller?: { kuerzel: string; name: string; farbe: string | null }[] }> | null = $state(null);
@@ -20,6 +20,63 @@
 	let filterPartei = $state('');
 	let currentPage = $state(1);
 
+	// Typeahead
+	let suggestions = $state<SuchVorschlag[]>([]);
+	let showSuggestions = $state(false);
+	let debounceTimer: ReturnType<typeof setTimeout> | null = null;
+	let selectedIdx = $state(-1);
+
+	function onSucheInput() {
+		selectedIdx = -1;
+		if (debounceTimer) clearTimeout(debounceTimer);
+		const q = filterSuche.trim();
+		if (q.length < 2) {
+			suggestions = [];
+			showSuggestions = false;
+			return;
+		}
+		debounceTimer = setTimeout(async () => {
+			try {
+				const res = await fetchSuchvorschlaege(q);
+				suggestions = res.items;
+				showSuggestions = suggestions.length > 0;
+			} catch {
+				suggestions = [];
+				showSuggestions = false;
+			}
+		}, 300);
+	}
+
+	function onSucheKeydown(e: KeyboardEvent) {
+		if (!showSuggestions) {
+			if (e.key === 'Enter') applyFilters();
+			return;
+		}
+		if (e.key === 'ArrowDown') {
+			e.preventDefault();
+			selectedIdx = Math.min(selectedIdx + 1, suggestions.length - 1);
+		} else if (e.key === 'ArrowUp') {
+			e.preventDefault();
+			selectedIdx = Math.max(selectedIdx - 1, -1);
+		} else if (e.key === 'Enter') {
+			e.preventDefault();
+			if (selectedIdx >= 0 && selectedIdx < suggestions.length) {
+				goto(`/vorlagen/${suggestions[selectedIdx].id}`);
+				showSuggestions = false;
+			} else {
+				showSuggestions = false;
+				applyFilters();
+			}
+		} else if (e.key === 'Escape') {
+			showSuggestions = false;
+		}
+	}
+
+	function pickSuggestion(s: SuchVorschlag) {
+		showSuggestions = false;
+		goto(`/vorlagen/${s.id}`);
+	}
+
 	function syncFromUrl() {
 		const p = new URL(window.location.href).searchParams;
 		filterTyp = p.get('typ') || '';
@@ -81,11 +138,32 @@
 <!-- Filters -->
 <div class="bg-white rounded-xl shadow-sm border border-gray-200 p-4 mb-6">
 	<div class="flex flex-wrap gap-3 items-end">
-		<div>
+		<div class="relative">
 			<label for="suche" class="block text-xs font-medium text-gray-500 mb-1">Suche</label>
 			<input id="suche" type="text" bind:value={filterSuche} placeholder="Volltextsuche..."
-				class="border border-gray-300 rounded-lg px-3 py-2 text-sm focus:ring-2 focus:ring-green-500 focus:border-green-500"
+				class="border border-gray-300 rounded-lg px-3 py-2 text-sm focus:ring-2 focus:ring-green-500 focus:border-green-500 w-64"
-				onkeydown={(e) => { if (e.key === 'Enter') applyFilters(); }} />
+				oninput={onSucheInput}
+				onkeydown={onSucheKeydown}
+				onfocusout={() => { setTimeout(() => showSuggestions = false, 200); }}
+				autocomplete="off" />
+			{#if showSuggestions}
+				<div class="absolute z-50 top-full left-0 mt-1 w-96 bg-white rounded-lg shadow-lg border border-gray-200 max-h-80 overflow-y-auto">
+					{#each suggestions as s, i}
+						<button
+							class="w-full text-left px-3 py-2 hover:bg-green-50 border-b border-gray-100 last:border-0 transition-colors {i === selectedIdx ? 'bg-green-50' : ''}"
+							onmousedown={() => pickSuggestion(s)}>
+							<div class="flex items-center gap-2">
+								<span class="font-mono text-xs text-green-700 shrink-0">{s.aktenzeichen || `#${s.id}`}</span>
+								<span class="text-xs text-gray-400 capitalize">{s.typ || ''}</span>
+							</div>
+							<div class="text-sm text-gray-800 truncate">{s.betreff || '–'}</div>
+							{#if s.snippet}
+								<div class="text-xs text-gray-500 mt-0.5 line-clamp-1">{@html s.snippet}</div>
+							{/if}
+						</button>
+					{/each}
+				</div>
+			{/if}
 		</div>
 		<div>
 			<label for="typ" class="block text-xs font-medium text-gray-500 mb-1">Typ</label>