fix: Backend-Start nach Tandoor-Router-Import

Future-annotations plus Limiter haben TandoorProbeIn unauflösbar gemacht.

Co-authored-by: Cursor <cursoragent@cursor.com>

.claude/rules/LESSONS_LEARNED.md

@@ -184,6 +184,12 @@ known_limitations=(
 
 **Regel:** Kein Join „Name der Liste gegen alle Tagebuchzeilen“. Datum aus der bereits gesetzten FK oder aus dem Eltern-Datensatz.
 
+## 10. `from __future__ import annotations` + FastAPI-Limiter (13.09.2026)
+
+**Was:** `tandoor.py` mit future-annotations und `body: TandoorProbeIn | None` unter `@limiter.limit`.
+**Problem:** Pydantic löst den Typ nicht auf → Import-Crash → Backend startet nicht → Login bekommt HTML (`Unexpected token '<'`).
+**Lösung:** Kein future-annotations in Routern; `Optional[TandoorProbeIn]`. Import-Test für den Router.
+
 ---
 
 **Zusammenfassung Nutrition Cluster:**

backend/routers/tandoor.py

@@ -1,6 +1,4 @@
 """Per-user Tandoor connection. No recipe import yet."""
-from __future__ import annotations
-
 from typing import Optional
 
 from fastapi import APIRouter, Depends, HTTPException
@@ -59,7 +57,7 @@ def write_settings(body: TandoorSettingsIn, session: dict = Depends(require_auth
 
 @router.post("/test")
 @limiter.limit("10/minute")
-def test_connection(request: Request, body: TandoorProbeIn | None = None, session: dict = Depends(require_auth)):
+def test_connection(request: Request, body: Optional[TandoorProbeIn] = None, session: dict = Depends(require_auth)):
     pid = session["profile_id"]
     body = body or TandoorProbeIn()
     with get_db() as conn:

backend/tests/test_tandoor_client.py

@@ -1,6 +1,14 @@
 from data_layer.tandoor_client import TandoorError, normalize_base_url, public_settings, token_hint
 
 
+def test_tandoor_router_imports():
+    from routers import tandoor
+
+    paths = {r.path for r in tandoor.router.routes}
+    assert "/api/tandoor/settings" in paths
+    assert "/api/tandoor/test" in paths
+
+
 def test_normalize_https_strips_slash():
     assert normalize_base_url("https://tandoor.stommer.de/") == "https://tandoor.stommer.de"
 

backend/version.py

@@ -21,7 +21,7 @@ MODULE_VERSIONS = {
     "caliper": "1.0.1",
     "activity": "1.2.1",  # Legacy CSV import: activity_entries feature enforcement
     "nutrition": "1.3.3",  # Unmapped ohne Kreuzjoin; Listen-Import Rebuild async
-    "tandoor": "1.0.0",  # Per-user URL + Token + Verbindungstest
+    "tandoor": "1.0.1",  # Router-Import ohne future-annotations (Backend startet)
     "bls": "1.0.5",  # GET /bls/units
     "photos": "1.0.0",
     "insights": "1.3.0",