🤖 Settings > Plugins: Hooks and Uninstall panels drop focus and ignore Escape #7753

A keyboard bug bash of Settings > Plugins (3 Sonnet 5.5 charters, sandbox run 2026-10-30) reported focus gaps in the per-plugin panels. I checked each claim against the source. None has a repro test yet.

Claims that the source supports

1. Hooks panel ignores Escape. PluginHooksPanel has no Escape handler, so Escape inside it closes the whole Settings dialog. ManageComponentsPanel uses useEscapeCancelsPanel for this, and the Hooks panel does not.
2. Closing the Hooks panel drops focus. Its Close button calls setHooksTarget(null) and nothing refocuses the card's Hooks button. The next Tab starts at the Settings nav.
3. Cancelling the Uninstall confirmation drops focus. onCancel={() => setUninstallTarget(null)} refocuses nothing. Opening the confirmation also leaves focus on the Uninstall button.

Claim that needs a decision

4. Opening Manage components leaves focus on the card button. If the user tabs out of the panel, Escape closes Settings, because useEscapeCancelsPanel acts only on events inside the panel.

Expected

Each panel returns focus to the button that opened it when it closes. The Manage components panel already does this through useButtonsByName. Escape inside any panel closes only that panel.

Found while verifying the plugin card layout fix. That PR does not change any focus code.

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