Terminal emulator feature

[desireddymohithreddy0925]

Description

This PR enhances the Pty (Terminal Emulator) widget in @termuijs/widgets by exposing programmable hooks to the spawned child process. It adds a write() method for programmatically sending text into the process's stdin (instead of exclusively relying on raw keyboard events) and a clear() method for purging the visual buffer manually.

Related Issue

Closes #2253

Which package(s)?

@termuijs/widgets

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 write method safely checks if the spawned process and stdin.writable stream are active before attempting any writes to prevent EPIPE crashes.

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: dfe8e0ea-644b-44e8-9003-708825bb5fe4

📥 Commits

Reviewing files that changed from the base of the PR and between 65d1f7e and 83650a7.

📒 Files selected for processing (1)

• packages/widgets/src/display/Pty.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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