feat(tasks): Cmd+Option+Left/Right to cycle task tabs

[wise-toddler]

Summary

• Add Cmd+Option+Left / Cmd+Option+Right to cycle through open task tabs in the top tab bar (wrap-around at edges, skips the home tab).
• Suppress the new cycle shortcuts inside text inputs (INPUT, TEXTAREA, SELECT, contentEditable, role="textbox", CodeMirror, xterm, Milkdown, ProseMirror) so they don't hijack the macOS "move by word" cursor behavior.

Closes

Closes #98

Notes on the diff

This branch also includes two small unrelated fixes that the typecheck on main currently fails without:

• fix(transport): add missing resolve-task route stub — registers a 501 stub for the missing module imported by rest-api/index.ts.
• fix(app): add missing ws and @trpc/server deps for host-capability-server — adds runtime deps already used by packages/apps/app/src/main/host-capability-server.ts.

Happy to split these out into a separate PR if preferred.

Test plan

• pnpm typecheck passes
• pnpm --filter @slayzone/app test:e2e e2e/core/16-tab-management.spec.ts — 11/11 pass, including 4 new cases for the shortcuts above.
• Manual: with multiple task tabs open, Cmd+Option+Left and Cmd+Option+Right cycle through them and wrap at the edges.
• Manual: shortcuts do NOT fire while typing in an input, textarea, contentEditable field, CodeMirror editor, xterm terminal, Milkdown/ProseMirror editor, or native <select>.
• Manual: with only the home tab open, the cycle shortcuts are a no-op.

[greptile-apps]

Last-Tab Shortcut Hijacks Editors

When focus is inside an input, textarea, contentEditable editor, CodeMirror, xterm, Milkdown, ProseMirror, or select, Cmd+9 still runs because this handler is enabled on form tags and has no editing guard. It calls preventDefault() and can switch tabs instead of letting the focused editor handle the key.

Suggested change

	useGuardedHotkeys(
	getKeys('last-task-tab'),
	(e) => {
	e.preventDefault()
	if (visibleTabs.length > 1) {
	useTabStore.getState().setActiveView('tabs')
	setActiveTabIndex(toFullIndex(visibleTabs.length - 1))
	}
	},
	{ enableOnFormTags: true, enabled: !isRecording }
	)
	useGuardedHotkeys(
	getKeys('last-task-tab'),
	(e) => {
	const el = e.target as HTMLElement
	if (el.tagName === 'INPUT' || el.tagName === 'TEXTAREA' || el.tagName === 'SELECT') return
	if (el.isContentEditable || el.getAttribute('role') === 'textbox') return
	if (el.closest?.('.cm-editor') || el.closest?.('.xterm')) return
	if (el.closest?.('.milkdown') || el.closest?.('.ProseMirror')) return
	e.preventDefault()
	if (visibleTabs.length > 1) {
	useTabStore.getState().setActiveView('tabs')
	setActiveTabIndex(toFullIndex(visibleTabs.length - 1))
	}
	},
	{ enableOnFormTags: true, enabled: !isRecording }
	)

Context Used: CLAUDE.md (source)

Prompt To Fix With AI

This is a comment left during a code review.
Path: packages/apps/app/src/renderer/src/app-shell/useAppShortcuts.ts
Line: 244-254

Comment:
**Last-Tab Shortcut Hijacks Editors**

When focus is inside an input, textarea, contentEditable editor, CodeMirror, xterm, Milkdown, ProseMirror, or select, `Cmd+9` still runs because this handler is enabled on form tags and has no editing guard. It calls `preventDefault()` and can switch tabs instead of letting the focused editor handle the key.

```suggestion
  useGuardedHotkeys(
    getKeys('last-task-tab'),
    (e) => {
      const el = e.target as HTMLElement
      if (el.tagName === 'INPUT' || el.tagName === 'TEXTAREA' || el.tagName === 'SELECT') return
      if (el.isContentEditable || el.getAttribute('role') === 'textbox') return
      if (el.closest?.('.cm-editor') || el.closest?.('.xterm')) return
      if (el.closest?.('.milkdown') || el.closest?.('.ProseMirror')) return
      e.preventDefault()
      if (visibleTabs.length > 1) {
        useTabStore.getState().setActiveView('tabs')
        setActiveTabIndex(toFullIndex(visibleTabs.length - 1))
      }
    },
    { enableOnFormTags: true, enabled: !isRecording }
  )
```

**Context Used:** CLAUDE.md ([source](https://app.greptile.com/slayzone/github/debuglebowski/slayzone/-/custom-context?memory=4d0a5da1-ee49-442f-ba49-d4a3dc97238d))

How can I resolve this? If you propose a fix, please make it concise.

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

[greptile-apps]

Rebinding Leaves Cmd+9 Unbound

last-task-tab is customizable, but the numbered tab handler now only binds Cmd+1 through Cmd+8. If a user rebinds this shortcut, Cmd+9 no longer has any handler even though the existing switch-tab-1-9 shortcut definition still presents mod+1-9 as the numbered tab range.

Context Used: CLAUDE.md (source)

Prompt To Fix With AI

This is a comment left during a code review.
Path: packages/shared/shortcuts/src/definitions.ts
Line: 172-178

Comment:
**Rebinding Leaves Cmd+9 Unbound**

`last-task-tab` is customizable, but the numbered tab handler now only binds `Cmd+1` through `Cmd+8`. If a user rebinds this shortcut, `Cmd+9` no longer has any handler even though the existing `switch-tab-1-9` shortcut definition still presents `mod+1-9` as the numbered tab range.

**Context Used:** CLAUDE.md ([source](https://app.greptile.com/slayzone/github/debuglebowski/slayzone/-/custom-context?memory=4d0a5da1-ee49-442f-ba49-d4a3dc97238d))

How can I resolve this? If you propose a fix, please make it concise.