feat: Versionsanzeige (VERSION-Datei, Footer, /api/version, Image-Tag)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

finance/app/main.py

@@ -1,17 +1,19 @@
 import hmac
 from contextlib import asynccontextmanager
 
-from fastapi import FastAPI, Form, Request
+from fastapi import Depends, FastAPI, Form, Request
 from fastapi.responses import HTMLResponse, RedirectResponse
 from fastapi.staticfiles import StaticFiles
 
 from app import auth
+from app.auth import require_auth
 from app.config import get_settings
 from app.db import get_engine
 from app.models.views import create_views
 from app.routers import (accounts, categories, gui, imports, planning,
                          scenarios, transactions)
 from app.routers.gui import templates
+from app.version import get_version
 
 
 @asynccontextmanager
@@ -55,3 +57,8 @@ def logout():
     resp = RedirectResponse("/login", status_code=303)
     resp.delete_cookie(auth.COOKIE)
     return resp
+
+
+@app.get("/api/version", dependencies=[Depends(require_auth)])
+def api_version():
+    return {"version": get_version()}