Local bundle not opening after download

[chrispcampbell]

There are two related issues with the new bundle selector that was added in #697.

When the "Save to Local" feature is used, the file is downloaded to the local bundles directory correctly, but if you try to select it, the bundle fails to load because Vite says that it's not found. The issue is that we use import.meta.glob to load the bundle, but the list of available keys is not refreshed by Vite when changes are made to the watched glob directory. We will need reload the page and/or Vite server.

Also, it looks like bundle files that are downloaded to a subdirectory (because the branch name contained a slash) cannot be loaded. The issue is that the glob pattern we use only looks for js files that are direct children of the bundles directory. We will need to modify it to use recursive pattern (bundles/**/*.js).

[chrispcampbell]

For the first part, I ended up changing the vite-local-bundles-plugin so that it uses dynamic import to load the bundle source code on the vite server side, and then it sends the source code to the client in a message using the same approach we use for other client-server message passing. On the client/browser side, we use dynamic import of the resulting blob. This avoids issues with import.meta.glob, since there didn't seem to be a way to get around vite caching the list of files returned by import.meta.glob.

For the second part, the glob pattern was changed to bundles/**/*.js.

I added tests to the model-check integration tests that verify that the bundle selector is refreshed after download/copy, and the new local bundle in each case can be loaded successfully.