chore: validate package existence before adding to compare

[iiio2]

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Feb 8, 2026 3:36pm

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Feb 8, 2026 3:36pm
npmx-lunaria	Ignored		Feb 8, 2026 3:36pm

[codecov]

Codecov Report

❌ Patch coverage is 93.54839% with 2 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
app/components/Compare/PackageSelector.vue	93.54%	2 Missing ⚠️

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[coderabbitai]

📝 Walkthrough

Walkthrough

This pull request adds asynchronous package existence validation to the PackageSelector component. When users press Enter to add a package, the component now calls checkPackageExists to verify the package name before adding it. The component introduces isCheckingPackage and packageError state variables, disables the input during validation, displays a spinner icon whilst checking, and shows error messages for non-existent packages. The associated test file is updated to mock the validation function and verify that only existing packages are added, whilst non-existent ones trigger error alerts.

Possibly related PRs

• fix(ui): prevent compare with non-existing package #1207: Modifies Enter key handling in PackageSelector.vue to restrict package additions based on dropdown matches, whilst this PR adds asynchronous existence validation before adding packages.

Suggested reviewers

• danielroe

🚥 Pre-merge checks | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The pull request description consists solely of an image demonstrating the validation feature, with no textual explanation of the changes made.	Add a written description explaining the changes, implementation details, and rationale behind the package existence validation feature.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[serhalp]

🤔 @iiio2 could you explain what problem this is solving? I tried poking around in the app and I couldn't find a scenario this would change.

[iiio2]

@serhalp , I thought I can provide validation when no package found.