fix: remaining ruff formatting issues and robust gitea auth

backend/app.py

@@ -33,11 +33,11 @@ from routers import (
     maintenance,
     models,
     routing,
+    skills,
     system,
     voice,
     wissen,
     zeitmaschine,
-    skills,
 )
 from routers import reminders as reminders_router
 from services import metrics_history, reminders, sentry, warmer

backend/routers/skills.py

@@ -1,8 +1,9 @@
-from fastapi import APIRouter
-from pydantic import BaseModel
 import os
 import subprocess
 
+from fastapi import APIRouter
+from pydantic import BaseModel
+
 router = APIRouter(prefix="/api")
 
 class RunSkillRequest(BaseModel):

backend/services/auftragsbuch.py

@@ -64,6 +64,24 @@ _FETCH_EVERY = 30.0  # s — Gitea nicht bei jedem UI-Poll anfragen
 _CI_CACHE: dict = {}  # { (repo, branch, head_sha): {"status": "success", "ts": time} }
 
 def _gitea_creds() -> tuple | None:
+    # 1. Fallback: Versuch via git credential manager (zukunftsfähig & plattformübergreifend)
+    try:
+        import subprocess
+        p = subprocess.run(
+            ["git", "credential", "fill"],
+            input=b"protocol=https\nhost=git.tobisniceshomelab.ddnsfree.com\n",
+            capture_output=True,
+            check=True
+        )
+        out = p.stdout.decode(errors="replace")
+        u_match = re.search(r"username=(.+)", out)
+        p_match = re.search(r"password=(.+)", out)
+        if u_match and p_match:
+            return u_match.group(1).strip(), p_match.group(1).strip()
+    except Exception:
+        pass
+
+    # 2. Fallback: Datei (hauptsächlich auf der AI-Box genutzt)
     try:
         cred = Path("~/.git-credentials").expanduser()
         for line in cred.read_text(encoding="utf-8").splitlines():