[BUG] Marketplace: pressing Enter on plugin navigates to Discover tab instead of showing plugin details

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When browsing plugins from any marketplace (not just local/directory-based), pressing Enter to view plugin details or toggle the plugin incorrectly navigates to the main Discover tab instead of showing the plugin details or performing the expected action.

This is different from #13509 which specifically concerns directory-based local marketplaces redirecting to the Installed tab. This bug affects regular git-based marketplaces and redirects to the Discover tab.

Note: #19383 described this exact behavior but was closed as a duplicate of #13509, which I believe was incorrect as they are different issues.

What Should Happen?

1. Pressing Enter on a highlighted plugin should display plugin details or toggle enable/disable
2. The user should remain in the Marketplaces context
3. The top navigation should continue to show Marketplaces as the active tab

Error Messages/Logs

No error messages. Navigation silently redirects to wrong location.

Steps to Reproduce

1. Run claude in terminal
2. Type /plugin
3. Tab to Marketplaces
4. Select any marketplace that has plugins available
5. Select a plugin using arrow keys
6. Press Enter to view details or toggle the plugin
7. Expected: Plugin details shown or plugin toggled, still in Marketplaces context
8. Actual: Navigates to Discover tab

Claude Model

Opus 4.5

Is this a regression?

Unknown

Last Working Version

N/A

Claude Code Version

Latest

Platform

Claude Max

Operating System

Linux (6.14.0)

Terminal/Shell

Bash

Additional Information

Related issues:

• #13509 — Similar navigation issue but for local directory marketplaces redirecting to Installed tab
• #19383 — Described this exact bug but was closed as duplicate (incorrectly IMO)

This appears to be a routing issue in the Marketplaces browse UI where Enter key events are being handled by the Discover view instead of the Marketplaces view.