Graceful errors on playground

[tevanburen]

Description

Intercept some error messages from Playground and display their text with something more user-friendly

Changes Made

• Set up yet another new field in the theme db, gracefulErrors, as a list of

{
 pattern: string;
 errorKey?: string;
 text?: string;
}

• Add a hook, useGracefulErrors, that returns a function that converts errors to a graceful message. In this hook, check the theme db for a pattern that matches - if found, then either display the associated text, OR, if we have errorKey instead, then use that key to grab the message from shared/i18n - this allows for multi-language support, and for us to have standardized messages
• Call the function when displaying errors during AskPlayground, and any errors shown in the room's "error box" (the red thing that comes up above the input component"

How to Test

1. Get on this branch
2. Modify AskPlayground such that it always throws an exception, for example

if (true) {
  throw new RuntimeException("abc");
}

3. In a room, try sending a message - you should see it error with "abc"
4. Navigate to update your theme at http://localhost:9090/SemossWeb/packages/client/dist/#/settings/admin-theme
5. In the playground section, add

{
  "playground": {
    ...etc,
    "gracefulErrors": [
      {
        "pattern": "abc",
        "text": "This is an example of a graceful error"
      }
    ]
  }
}

6. Save the theme
7. In Playground, reload the page, then again try to chat
8. Verify that "This is an example of a graceful error" appears in the toast and in the "error box"
9. In your theme map, change the graceful error to

{
  "pattern": "abc",
  "errorKey": "overloaded"
}

10. Save the theme
11. In Playground, reload the page, then again try to chat
12. Verify that "This model is unavailable right now. Please try a different model." appears in the toast and in the "error box"

Notes

There are a lot of random formatting changes, those are biome formatting from merges. Can be ignored

[github-actions]

@CodiumAI-Agent /update_changelog