refactor: remove dependency injection for IPRoute in interface and bridge functions

backend/src/network_api.py

@@ -183,14 +183,14 @@ def parse_flags(flags_int: int) -> list[str]:
             result.append(name)
     return result
 
-def iface_index(name: str, ip: IPRoute = Depends(get_iproute)) -> int:
+def iface_index(name: str, ip: IPRoute) -> int:
     idx = ip.link_lookup(ifname=name)
     if not idx:
         raise HTTPException(status_code=404, detail=f"Interface {name} not found")
     return idx[0]
 
 
-def bridge_exists(name: str, ip: IPRoute = Depends(get_iproute)) -> bool:
+def bridge_exists(name: str, ip: IPRoute) -> bool:
     return bool(ip.link_lookup(ifname=name))
 
 
@@ -352,16 +352,16 @@ def full_state(
 
 @router.post("/create")
 def create_bridge(req: BridgeCreateRequest, ip: IPRoute = Depends(get_iproute)):
-    if bridge_exists(req.name):
+    if bridge_exists(req.name, ip):
         raise HTTPException(400, f"Bridge {req.name} already exists")
 
     # Bridge erzeugen
     ip.link("add", ifname=req.name, kind="bridge")
-    br_idx = iface_index(req.name)
+    br_idx = iface_index(req.name, ip)
 
     # Interfaces hinzufügen
     for iface in req.interfaces:
-        idx = iface_index(iface)
+        idx = iface_index(iface, ip)
         ip.link("set", index=idx, master=br_idx)
 
     # Bridge aktivieren
@@ -376,10 +376,10 @@ def create_bridge(req: BridgeCreateRequest, ip: IPRoute = Depends(get_iproute)):
 
 @router.post("/remove")
 def remove_bridge(req: BridgeRemoveRequest, ip: IPRoute = Depends(get_iproute)):
-    if not bridge_exists(req.name):
+    if not bridge_exists(req.name, ip):
         raise HTTPException(404, f"Bridge {req.name} not found")
 
-    br_idx = iface_index(req.name)
+    br_idx = iface_index(req.name, ip)
 
     # Bridge runterfahren
     ip.link("set", index=br_idx, state="down")