Fix onboarding webview typecheck

[jack-champagne]

Summary

• mark the browser-side onboarding entry point as a module
• restore the declared global Window augmentation and inferred callback types

Validation

• pnpm --filter amicode typecheck

This fixes the pre-existing fast CI failure seen on main and is intentionally separate from PR #446.

Summary by CodeRabbit

• Chores
  • Updated internal module handling without changing user-visible behavior.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ae10f7c3-2ad6-42f7-ae3a-ce7335fc6695

📥 Commits

Reviewing files that changed from the base of the PR and between 586747c and 7d2b7c0.

📒 Files selected for processing (1)

• packages/extension/src/onboarding_webview.ts

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.

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📝 Walkthrough

Walkthrough

The onboarding webview entry point now includes an empty export. This establishes external module scope without changing runtime behavior or exported declarations.

Changes

Onboarding webview module

Layer / File(s)	Summary
Declare external module scope packages/extension/src/onboarding_webview.ts	Adds an empty export to establish module scope. No runtime logic changes.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 7d2b7

This is a small, localized TypeScript typecheck fix with no actionable merge-blocking risk remaining after normal checks and review.

Suggested reviewers: jeonghun-jj-lee

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: fixing the onboarding webview typecheck.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/onboarding-webview-typecheck

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