feat: remove space and @ from user input atproto handle

[shuuji3]

This change prevents common mistakes for atproto handle input. Many apps includes @-prefix so users can easily copy their handle with a extra character @ and sometimes spaces in their UI.

Currenctly, I have to strictly input my handle shuuji3.xyz, now I can input @shuuji3.xyz.

For reference, this is Bluesky app for @npmx.dev profile:

[vercel]

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Feb 7, 2026 10:20am

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Feb 7, 2026 10:20am
npmx-lunaria	Ignored		Feb 7, 2026 10:20am

[codecov]

Codecov Report

❌ Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
app/components/Header/AuthModal.client.vue	20.00%	2 Missing and 2 partials ⚠️

📢 Thoughts on this report? Let us know!

[danielroe]

what about doing the validation at the input level? ie stripping invalid characters directly on paste/type?

[coderabbitai]

📝 Walkthrough

Walkthrough

Adds a watcher to the login handle input in the client-side auth modal that normalises user-typed handles in real time. Normalisation trims surrounding whitespace, converts to lowercase, and removes any characters other than lowercase letters a–z, digits 0–9, dot (.) and hyphen (-). If the normalised value differs from the original typed value, the input field is updated. No changes were made to login submission behaviour, exported/public APIs, or control flow.

Suggested reviewers

• danielroe

🚥 Pre-merge checks | ✅ 1

✅ Passed checks (1 passed)

Check name	Status	Explanation
Description check	✅ Passed	The pull request description clearly explains the feature: normalizing atproto handle input by removing spaces and '@' prefixes, with contextual images showing the problem and solution.

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✨ Finishing touches

🧪 Generate unit tests (beta)

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

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[coderabbitai]

Actionable comments posted: 1

[shuuji3]

Yeah, that's better approach 👍🏻 I'll update later today.