Sprint 14: User-Profil-System (bio, wohnort, erfahrung, avatar)

- DB-Migrationen: 7 neue Spalten in users (bio, wohnort, erfahrung, social_link, profil_sichtbarkeit, avatar_url, email_verified)
- GET /api/auth/me gibt nun alle Profil-Felder + created_at zurück
- PATCH /api/profile: Profil-Felder aktualisieren (mit Validierung)
- POST /api/profile/avatar: Avatar-Upload (PIL JPEG-Konvertierung, HEIC-Support)
- Router in main.py registriert

backend/main.py

@@ -72,6 +72,7 @@ from routes.friends    import router as friends_router
 from routes.chat       import router as chat_router
 from routes.admin      import router as admin_router
 from routes.webcal     import router as webcal_router
+from routes.profile    import router as profile_router
 
 app.include_router(auth_router,       prefix="/api/auth",       tags=["Auth"])
 app.include_router(dogs_router,       prefix="/api/dogs",       tags=["Hunde"])
@@ -96,6 +97,7 @@ app.include_router(friends_router,    prefix="/api/friends",    tags=["Freunde"]
 app.include_router(chat_router,       prefix="/api/chat",       tags=["Chat"])
 app.include_router(admin_router,      prefix="/api/admin",      tags=["Admin"])
 app.include_router(webcal_router,     prefix="/api/webcal",     tags=["WebCal"])
+app.include_router(profile_router,    prefix="/api/profile",    tags=["Profil"])
 
 
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