fix: enhance MCP token handling (#14483)

fix #14475 

#### PR Dependency Tree


* **PR #14483** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **New Features**
* Enhanced MCP server token management with improved security—tokens now
display only once with redaction support.
* Updated token creation and deletion workflows with clearer UI state
controls.
* Added tooltip guidance when copying configuration with redacted
tokens.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/i18n/src/i18n.gen.ts

@@ -8497,6 +8497,10 @@ export function useAFFiNEI18N(): {
       * `Enable other MCP Client to search and read the doc of AFFiNE.`
       */
     ["com.affine.integration.mcp-server.desc"](): string;
+    /**
+      * `The MCP token is shown only once. Delete and recreate it to copy the JSON configuration.`
+      */
+    ["com.affine.integration.mcp-server.copy-json.disabled-hint"](): string;
     /**
       * `Notes`
       */

packages/frontend/i18n/src/resources/en.json

@@ -2129,6 +2129,7 @@
   "com.affine.integration.calendar.no-calendar": "No subscribed calendars yet.",
   "com.affine.integration.mcp-server.name": "MCP Server",
   "com.affine.integration.mcp-server.desc": "Enable other MCP Client to search and read the doc of AFFiNE.",
+  "com.affine.integration.mcp-server.copy-json.disabled-hint": "The MCP token is shown only once. Delete and recreate it to copy the JSON configuration.",
   "com.affine.audio.notes": "Notes",
   "com.affine.audio.transcribing": "Transcribing",
   "com.affine.audio.transcribe.non-owner.confirm.title": "Unable to retrieve AI results for others",