Add configurable terminal port support and update translations

- Updated nginx configuration to use a placeholder for terminal port.
- Modified run.sh to read terminal port from options file and start ttyd on the specified port.
- Added terminal port configuration option in English, Bulgarian, German, and Spanish translations.

openclaw_assistant/translations/bg.yaml

@@ -7,6 +7,10 @@ configuration:
     name: Активиране на уеб терминал
     description: Активиране на уеб терминал бутона в Home Assistant (Ingress) чрез ttyd
   
+  terminal_port:
+    name: Порт на терминал
+    description: Номер на порт за уеб терминала (по подразбиране - 7681). Променете, ако този порт е в конфликт с друга услуга.
+  
   gateway_public_url:
     name: Публичен URL на Gateway
     description: Публичен базов URL за отваряне на Gateway уеб интерфейса в нов таб (не вграден). Пример - https://example.duckdns.org:12345 или http://192.168.1.10:18789

openclaw_assistant/translations/de.yaml

@@ -7,6 +7,10 @@ configuration:
     name: Web-Terminal aktivieren
     description: Web-Terminal-Schaltfläche in Home Assistant (Ingress) über ttyd aktivieren
   
+  terminal_port:
+    name: Terminal-Port
+    description: Portnummer für das Web-Terminal (Standard - 7681). Ändern Sie diese, wenn dieser Port mit einem anderen Dienst in Konflikt steht.
+  
   gateway_public_url:
     name: Öffentliche Gateway-URL
     description: Öffentliche Basis-URL zum Öffnen der Gateway-Weboberfläche in einem neuen Tab (nicht eingebettet). Beispiel - https://example.duckdns.org:12345 oder http://192.168.1.10:18789

openclaw_assistant/translations/en.yaml

@@ -7,6 +7,10 @@ configuration:
     name: Enable Web Terminal
     description: Enable web terminal Button inside Home Assistant (Ingress) via ttyd
   
+  terminal_port:
+    name: Terminal Port
+    description: Port number for the web terminal (default - 7681). Change if this port conflicts with another service.
+  
   gateway_public_url:
     name: Gateway Public URL
     description: Public base URL for opening the Gateway Web UI in a new tab (not embedded). Example - https://example.duckdns.org:12345 or http://192.168.1.10:18789

openclaw_assistant/translations/es.yaml

@@ -7,6 +7,10 @@ configuration:
     name: Activar terminal web
     description: Activar botón de terminal web dentro de Home Assistant (Ingress) mediante ttyd
   
+  terminal_port:
+    name: Puerto del terminal
+    description: Número de puerto para el terminal web (predeterminado - 7681). Cambie si este puerto entra en conflicto con otro servicio.
+  
   gateway_public_url:
     name: URL pública del Gateway
     description: URL base pública para abrir la interfaz web del Gateway en una nueva pestaña (no integrada). Ejemplo - https://example.duckdns.org:12345 o http://192.168.1.10:18789