Improvements and fixes

Adding a Phoenix Contact or Huawei data logger works again, instead of being refused the moment it is saved. A device's web page opened through remote access no longer loops endlessly or arrives as a file download.

• Adding a Phoenix Contact or Huawei data logger no longer fails the moment it is saved.
• A device's web page opened through remote access no longer loops endlessly or arrives as a file download.
• The assistant now says when web search or document reading is unavailable, instead of answering from memory.
• The name "MCP Server Authentication" is reserved for the assistant's own token and is refused when an access token is created.
• The "Battery storage present" switch in a plant's master data now shows in the user's language.