#1787 Fix terminal first responder restoration after workspace switches

Summary

• add a regression test that reproduces workspace-switch focus loss when the returning terminal is still zero-sized on the first restore attempt
• keep retrying terminal first-responder restoration for a short bounded window while workspace visibility, layout, and pane selection settle
• stop retrying once the intended terminal surface owns first responder again

Verification

• ./scripts/reload.sh --tag issue1122-focus

Fixes #1122

---

Summary by cubic

Fixes terminal keyboard focus loss after workspace switches by adding a bounded, delayed retry that reapplies first responder only after the returning terminal is visible, active, and sized. No-op visible/active updates no longer rearm the retry budget.

• Bug Fixes
  • Implemented automatic first-responder retry (30ms delay, up to 8 tries). Budget arms only on state changes (window key, visible/active flips, pane/tab selection), clears on success, and retries on hidden/zero-size, stale/inactive target, or makeFirstResponder failure.
  • Added TerminalWorkspaceSwitchFocusTests covering deferred-geometry recovery and ensuring no-op visible/active updates don’t reset the budget.

Summary by CodeRabbit

• Bug Fixes
  • Improved focus handling for terminal views during workspace switches by introducing a bounded automatic retry so terminals reliably regain focus after hidden, tiny, or deferred geometry restores.
• Tests
  • Added automated tests validating focus restoration after workspace switches and confirming redundant visibility/active updates do not rearm the retry budget.