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 Summary

This PR adds task-tab cycling shortcuts for the app shell. The main changes are:

• New Cmd+Option+Left and Cmd+Option+Right bindings for previous and next task tab navigation.
• Wrap-around tab cycling that skips the home tab.
• Shortcut guards for text fields and editor surfaces.
• Shortcut definitions for the new customizable tab actions.
• E2E coverage for cycling, wrapping, home-tab behavior, and input suppression.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
packages/apps/app/src/renderer/src/app-shell/useAppShortcuts.ts	Adds explicit disabled-shortcut handling and task-tab cycling handlers with text/editor guards.
packages/shared/shortcuts/src/definitions.ts	Adds customizable shortcut definitions for next and previous task tab navigation.
packages/apps/app/e2e/core/16-tab-management.spec.ts	Adds tests for task-tab cycling, wrap-around behavior, home-tab behavior, and input suppression.

_{Reviews (3): Last reviewed commit: "fix(shortcuts): respect explicit null ov..." | Re-trigger Greptile}

Context used:

• Context used - CLAUDE.md (source)
• Context used - AGENTS.md (source)

[wise-toddler]

Hey @debuglebowski — could you take a look when you get a chance? 🙏

Quick notes:

• Scope: narrow feature — just Cmd+Option+Left/Right to cycle task tabs (matching macOS convention). Wraps at edges, guarded against text inputs (INPUT/TEXTAREA/SELECT/contentEditable/role="textbox"/CodeMirror/xterm/Milkdown/ProseMirror) so it doesn't hijack the native "move by word" cursor behavior. Closes feat: Cmd+Option+Left/Right to switch between open task tabs (top bar) #98.
• Tests: 4 new Playwright cases added to e2e/core/16-tab-management.spec.ts (forward+wrap, backward+wrap, input-guard, home→first/last). 11/11 pass locally.
• Red checks: the 4 dry-run / Build (*) failures are unrelated — they need MACOS_CERTIFICATE / signing secrets which fork PRs can't access (GitHub policy). All actual code-validating checks are green (check, check-windows, workflow-lint, Greptile Review). They'll go green once merged into main where the secrets exist.
• Two small bundled fixes: fix(transport): resolve-task route stub and fix(app): missing ws + @trpc/server deps — these fix pre-existing typecheck breakage on main that would otherwise block CI. Happy to split them into a separate PR if you'd prefer.

Let me know if you'd like any changes 🙂