fix: repair web UI helpers and proxy form handling

Co-Authored-By: Paperclip <noreply@paperclip.ing>

media-webgui/app.py

@@ -266,6 +266,11 @@ def get_device():
         f"Gesucht: '{wanted or 'beliebig'}'. Gefunden: {last}"
     )
 
+
+def _get_jd_device():
+    """Backward-compatible wrapper for older call sites."""
+    return get_device()
+
 SSH_KNOWN_HOSTS = os.environ.get("SSH_KNOWN_HOSTS", "/ssh/known_hosts")
 
 def ssh_connect() -> paramiko.SSHClient:
@@ -961,6 +966,11 @@ def render_page(message: str = "", error: str = "") -> str:
 </body>
 </html>"""
 
+
+def render_main_page(message: str = "", error: str = "") -> str:
+    """Backward-compatible wrapper used by existing route handlers."""
+    return render_page(message=message, error=error)
+
 @dataclass
 class ProxyCheckResult:
     proto:      str
@@ -1314,18 +1324,18 @@ async def proxies_get():
 @app.post("/proxies", response_class=HTMLResponse)
 async def proxies_post(
     request: Request,
-    socks5_proxies: str = Form(""),
+    socks5_in: str = Form(""),
-    socks4_proxies: str = Form(""),
+    socks4_in: str = Form(""),
     export_path:    str = Form(""),
     action:         str = Form("preview"),
 ):
-    entries = _parse_proxy_entries(socks5_proxies, socks4_proxies)
+    entries = _parse_proxy_entries(socks5_in, socks4_in)
 
     if action == "preview" or not entries:
         msg = f"{len(entries)} Proxy/s erkannt." if entries else "Keine Proxies eingegeben."
         return render_proxies_page(
-            socks5_in=socks5_proxies,
+            socks5_in=socks5_in,
-            socks4_in=socks4_proxies,
+            socks4_in=socks4_in,
             export_path=export_path,
             message=msg,
         )
@@ -1338,8 +1348,8 @@ async def proxies_post(
         jd_msg = push_proxies_to_jd(working)
 
     return render_proxies_page(
-        socks5_in=socks5_proxies,
+        socks5_in=socks5_in,
-        socks4_in=socks4_proxies,
+        socks4_in=socks4_in,
         export_path=export_path,
         check_results=results,
         jd_message=jd_msg,