fix(search): preserve repository intent and add good-css demo

[harlan-zw]

🔗 Linked issue

❓ Type of change

• 📖 Documentation
• 🐞 Bug fix
• 👌 Enhancement
• ✨ New feature
• 🧹 Chore
• ⚠️ Breaking change

📚 Description

Submitting owner/repo before the homepage lookup finishes opens ordinary search. Submission now waits, then opens an indexed repository or starts indexing an unlisted one. GitHub URLs follow the same path. Editing the query, closing search, or a lookup error cancels the pending submission.

Adds a recorded good-css demo: a responsive reading list with filters, bookmarks, theme switching, and a width control.

🤖 AI disclosure: Harlan Agent Kit modified this description. My AI open-source policy.

[harlan-zw]

Agent verification by Codex:

• Reproduced immediate Enter on the live homepage sending vojtaholik/good-css to ordinary search.
• Repeated that action locally after the fix. The homepage stayed open and the existing modal finished indexing the repository.
• Opened the recorded demo through its local demo page in the site's allow-scripts iframe. Category filters, bookmarks, theme switching, and the keyboard width control worked.
• Inspected the final desktop and 390px mobile screenshots. The mobile layout has no horizontal overflow.

Desktop	Mobile