Strip `index.ts` and `index.js` from extension display paths in both
compact and expanded views of the startup banner. This makes the list more
readable by removing redundant filename noise.
Changes:
- Add `formatExtensionDisplayPath()` helper to centralize path formatting
- Update `getCompactExtensionLabels()` to strip index files from segments
- Update expanded view formatting to use the new helper
- Add comprehensive tests for both views
Fixes#3549Fixes#3559
Custom footers registered via ctx.ui.setFooter(...) whose render()
closure touched ctx would crash pi on /quit: runtimeHost.dispose()
invalidates the extension runner before the TUI stops rendering, so
any still-attached footer render tick hit assertActive() and threw.
Call resetExtensionUI() before runtimeHost.dispose() in the interactive
shutdown path, matching the rebindCurrentSession() pattern. This
disposes the custom footer (clearing its interval) and detaches it
from the TUI tree before the runner goes stale.
closes#3595
Co-authored-by: Mario Zechner <badlogicgames@gmail.com>