Add keyboard shortcut to promote a link peek into a full tab

[bhanni01]

Summary

When a link is opened in peek mode (Shift + Click), pressing Esc closes the peek, which works well. However, there's no keyboard shortcut to do the opposite: promote the peek into a regular tab. Right now the only way is to click the button in the peek view.

Current behavior

1. Shift + Click a link to open it in a peek.
2. Press Esc → the peek closes ✅
3. To keep the page, you have to move the mouse and click the "open as tab" button. There's no keyboard equivalent ❌

Expected behavior

A keyboard shortcut that converts the current peek into a full tab, mirroring how Esc dismisses it. This keeps the peek workflow fully keyboard-driven: peek, then either dismiss or keep.

Suggested shortcut

Some options (open to whatever fits existing keybindings best):

• Cmd/Ctrl + Enter
• Shift + Enter
• Cmd/Ctrl + O

Ideally it would also be shown in the button's tooltip so it's discoverable.

Why

Peek is great for quickly checking a link without breaking focus. Having a close shortcut but no "keep" shortcut makes the flow feel incomplete and forces a switch from keyboard to mouse at the exact moment you've decided the link is worth keeping.``

I'm happy to open a PR for this.

[bhanni01]

``

[driceroland]

Nice touch, and #326 is the way in: ⌘Return will keep a peek as a tab, mirroring Escape. A few small changes were asked on it (Caps Lock, the keypad's Enter, a text field inside the peek), and this closes when it lands.

[driceroland]

Done on main by c8f4b51 (#326): ⌘Return (or ⌘ keypad-Enter) keeps a peek as a tab. Ships in 1.0.4.