update

backend/database.py

@@ -24,6 +24,13 @@ CREATE TABLE IF NOT EXISTS guide_progress (
 )
 """
 
+CREATE_TOPICS = """
+CREATE TABLE IF NOT EXISTS topics (
+    name TEXT PRIMARY KEY,
+    created_at TEXT NOT NULL
+)
+"""
+
 _db: aiosqlite.Connection | None = None
 
 
@@ -39,6 +46,7 @@ async def init_db():
     db = await get_db()
     await db.execute(CREATE_GUIDES)
     await db.execute(CREATE_PROGRESS)
+    await db.execute(CREATE_TOPICS)
     await db.execute(
         "UPDATE guides SET status = 'error', progress = NULL, error_msg = 'Server-Neustart' "
         "WHERE status IN ('queued', 'generating')"
@@ -100,6 +108,31 @@ async def delete_guide(guide_id: str) -> bool:
     return cursor.rowcount > 0
 
 
+# --- Themen ---
+
+async def create_topic(name: str) -> None:
+    from datetime import datetime, timezone
+    db = await get_db()
+    await db.execute(
+        "INSERT OR IGNORE INTO topics (name, created_at) VALUES (?, ?)",
+        (name, datetime.now(timezone.utc).isoformat()),
+    )
+    await db.commit()
+
+
+async def list_topics() -> list[str]:
+    db = await get_db()
+    cursor = await db.execute("SELECT name FROM topics ORDER BY created_at DESC")
+    rows = await cursor.fetchall()
+    return [row[0] for row in rows]
+
+
+async def delete_topic(name: str) -> None:
+    db = await get_db()
+    await db.execute("DELETE FROM topics WHERE name = ?", (name,))
+    await db.commit()
+
+
 # --- Kapitel-Fortschritt ---
 
 async def list_progress(guide_id: str) -> list[str]: