Allow changing Hysteria UDP port when 443 is already in use.

Co-authored-by: Cursor <cursoragent@cursor.com>

app.py

@@ -1701,6 +1701,11 @@ class Socks5SettingsRequest(BaseModel):
     password: Optional[str] = None
 
 
+class HysteriaSettingsRequest(BaseModel):
+    protocol: str = 'hysteria'
+    port: Optional[int] = None
+
+
 class ProtocolRequest(BaseModel):
     protocol: str = 'awg'
 
@@ -2963,6 +2968,70 @@ async def api_socks5_update_credentials(request: Request, server_id: int, req: S
         return JSONResponse({'error': str(e)}, status_code=500)
 
 
+@app.get('/api/servers/{server_id}/hysteria/settings', tags=["Protocols"])
+async def api_hysteria_get_settings(request: Request, server_id: int, protocol: str = 'hysteria'):
+    """Return current Hysteria domain/port for the settings modal."""
+    if not _check_admin(request):
+        return JSONResponse({'error': 'Forbidden'}, status_code=403)
+    try:
+        data = load_data()
+        if server_id >= len(data['servers']):
+            return JSONResponse({'error': 'Server not found'}, status_code=404)
+        if not is_valid_protocol(protocol) or protocol_base(protocol) != 'hysteria':
+            return JSONResponse({'error': 'Invalid protocol'}, status_code=400)
+        server = data['servers'][server_id]
+        ssh = get_ssh(server)
+        ssh.connect()
+        manager = get_protocol_manager(ssh, protocol)
+        settings = manager.get_settings()
+        ssh.disconnect()
+        saved = (server.get('protocols') or {}).get(protocol) or {}
+        if not settings.get('port') and saved.get('port'):
+            settings['port'] = int(saved['port'])
+        return {'status': 'success', **settings}
+    except Exception as e:
+        logger.exception("Error reading Hysteria settings")
+        return JSONResponse({'error': str(e)}, status_code=500)
+
+
+@app.post('/api/servers/{server_id}/hysteria/settings', tags=["Protocols"])
+async def api_hysteria_update_settings(request: Request, server_id: int, req: HysteriaSettingsRequest):
+    """Change Hysteria UDP listen port and recreate the container."""
+    if not _check_admin(request):
+        return JSONResponse({'error': 'Forbidden'}, status_code=403)
+    try:
+        data = load_data()
+        if server_id >= len(data['servers']):
+            return JSONResponse({'error': 'Server not found'}, status_code=404)
+        protocol = req.protocol if is_valid_protocol(req.protocol) and protocol_base(req.protocol) == 'hysteria' else 'hysteria'
+        server = data['servers'][server_id]
+        ssh = get_ssh(server)
+        ssh.connect()
+        manager = get_protocol_manager(ssh, protocol)
+        result = manager.update_settings(port=req.port)
+        ssh.disconnect()
+        if result.get('status') == 'error':
+            return JSONResponse(
+                {'error': result.get('message') or 'Failed to update settings', **{k: v for k, v in result.items() if k != 'status'}},
+                status_code=400,
+            )
+        if result.get('port'):
+            srv_proto = server.setdefault('protocols', {}).setdefault(protocol, {})
+            srv_proto['port'] = str(result['port'])
+            srv_proto['installed'] = True
+            srv_proto['base_protocol'] = protocol_base(protocol)
+            srv_proto['instance'] = protocol_instance(protocol)
+            srv_proto['display_name'] = protocol_display_name(protocol)
+            srv_proto['container_name'] = protocol_container_name(protocol)
+            if result.get('domain'):
+                srv_proto['domain'] = result['domain']
+            save_data(data)
+        return result
+    except Exception as e:
+        logger.exception("Error updating Hysteria settings")
+        return JSONResponse({'error': str(e)}, status_code=500)
+
+
 @app.post('/api/servers/{server_id}/uninstall', tags=["Protocols"])
 async def api_uninstall_protocol(request: Request, server_id: int, req: ProtocolRequest):
     if not _check_admin(request):