Links in agent messages open with a plain click in the app

In the Obeya desktop app, a plain click on a link in a conversation (a demo link, a pull request) did nothing; only Cmd+click opened it. Now a plain click opens it in the default browser, as in a browser tab.

Before

  1. The click reached the link (the page did not block it).
  2. A script of Tauri's opener plugin, which the app registered, caught the click and asked the plugin to open the link.
  3. The page may not call that plugin (by design, it may only move the window), so the request failed silently.
  4. Cmd+click skipped that script, which is why it worked.

After

  1. The app no longer registers the plugin; it only uses its function to start the browser.
  2. The click goes to the app's own link handling, which already opened every outside link and new window in the default browser.
  3. Links to Obeya's own pages (files an agent attached) open in the browser signed in, as before with Cmd+click.

Checked in the real app (macOS)

Built from this branch against a scratch Obeya with a card whose agent message holds a link; a real mouse click was sent into the app's window.

before:  click on <A> (not prevented)        → the app hears nothing, no browser
after:   click on <A> (not prevented)        → app: open in browser https://example.com/…

The same plugin script was in the Windows and Linux builds, so the fix applies there too. Your installed “Obeya (checkout)” app rebuilds itself once this is on main; after that, a plain click on a link should open it.