Hotkey manager feature

[desireddymohithreddy0925]

Description

This PR implements a centralized HotkeyManager registry in @termuijs/core. Previously, developers had to attach global shortcuts (like Ctrl+C to quit, or F1 for help) to the root widget layout, coupling shortcut logic poorly. The HotkeyManager provides an elegant .register() API that components can hook into during mount lifecycles, guaranteeing LIFO execution order when global hotkeys collide.

Related Issue

Closes #2259

Which package(s)?

@termuijs/core

Type of Change

• 🐛 Bug fix (type:bug)
• ✨ Feature (type:feature)
• 📝 Docs (type:docs)
• 🧪 Tests (type:testing)
• ♻️ Refactor (type:refactor)
• 🎨 Design / UX (type:design)
• ♿ Accessibility (type:accessibility)
• ⚡ Performance (type:performance)
• 🔧 DevOps / CI (type:devops)
• 🔒 Security (type:security)

Checklist

• ⭐ You starred the repo. The needs-star check blocks your merge otherwise.
• Tests pass locally: bun vitest run
• Build passes: bun run build
• Typecheck passes: bun run typecheck
• You read CONTRIBUTING.md.
• Your PR title follows type: short description.
• Widget state mutators call markDirty() (if your change affects rendering).
• No new any types without an inline comment explaining why.
• No unrelated refactors bundled into this PR.

GSSoC 2026 Participation

• You are a GSSoC 2026 contributor.
• Your GSSoC profile: https://gssoc.girlscript.org/profile/YOUR_PROFILE_ID_HERE

Screenshots / Recordings (UI changes)

Notes for the Reviewer

The register() method returns a cleanup closure () => void, allowing developers using @termuijs/jsx hooks to simply return HotkeyManager.register(...) directly inside a useEffect!

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 88e8c067-1859-4433-a8fc-6b6c0d6d055b

📥 Commits

Reviewing files that changed from the base of the PR and between 65d1f7e and e09a668.

📒 Files selected for processing (2)

• packages/core/src/index.ts
• packages/core/src/input/HotkeyManager.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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