fix: Fix CI/CD issues and enhance integration

Signed-off-by: Rafal Zielinski <sq4ind@gmail.com>

custom_components/adguard_hub/strings.json

@@ -7,21 +7,22 @@
         "data": {
           "host": "Host",
           "port": "Port",
-          "username": "Username",
-          "password": "Password",
+          "username": "Username (optional)",
+          "password": "Password (optional)",
           "ssl": "Use SSL",
           "verify_ssl": "Verify SSL Certificate"
         }
       }
     },
     "error": {
-      "cannot_connect": "Failed to connect to AdGuard Home",
-      "invalid_auth": "Invalid username or password",
-      "timeout": "Connection timeout",
-      "unknown": "Unexpected error occurred"
+      "cannot_connect": "Failed to connect to AdGuard Home. Please check the host and port.",
+      "invalid_auth": "Invalid username or password. Please verify your credentials.",
+      "invalid_host": "Invalid host format. Please enter a valid hostname or IP address.",
+      "timeout": "Connection timeout. Please check your network connection and try again.",
+      "unknown": "Unexpected error occurred. Please check your configuration and try again."
     },
     "abort": {
-      "already_configured": "AdGuard Control Hub is already configured"
+      "already_configured": "AdGuard Control Hub is already configured for this host and port"
     }
   }
 }