Feature: Konto löschen (Play Store Pflicht) — DELETE /profile/account + Button in Settings (SW by-v786)

backend/routes/profile.py

@@ -142,3 +142,28 @@ async def put_world_config(body: WorldConfigIn, user=Depends(get_current_user)):
         conn.execute("UPDATE users SET world_config=? WHERE id=?",
                      (_json.dumps(body.config), user['id']))
     return {"status": "ok"}
+
+
+# ----------------------------------------------------------
+# DELETE /profile/account — Konto unwiderruflich löschen
+# ----------------------------------------------------------
+@router.delete('/account')
+async def delete_account(user=Depends(get_current_user)):
+    """Löscht das Konto und alle zugehörigen Daten unwiderruflich."""
+    uid = user['id']
+    with db() as conn:
+        # Alle Hunde-IDs des Users
+        dog_ids = [r['id'] for r in conn.execute(
+            "SELECT id FROM dogs WHERE user_id=?", (uid,)).fetchall()]
+        for did in dog_ids:
+            conn.execute("DELETE FROM diary WHERE dog_id=?", (did,))
+            conn.execute("DELETE FROM health WHERE dog_id=?", (did,))
+            conn.execute("DELETE FROM training_sessions WHERE dog_id=?", (did,))
+            conn.execute("DELETE FROM training_streaks WHERE dog_id=?", (did,))
+            conn.execute("DELETE FROM expenses WHERE dog_id=?", (did,))
+        conn.execute("DELETE FROM dogs WHERE user_id=?", (uid,))
+        conn.execute("DELETE FROM push_subscriptions WHERE user_id=?", (uid,))
+        conn.execute("DELETE FROM notifications WHERE user_id=?", (uid,))
+        conn.execute("DELETE FROM forum_posts WHERE user_id=?", (uid,))
+        conn.execute("DELETE FROM users WHERE id=?", (uid,))
+    return {"status": "deleted"}