[Bug] Login redirect URI malformed: missing slash in localhost URL

Bug Description
The login route is broken. I click the link in the email and it fails with this error. The URL only has one slash in it! "Redirect URI http:/localhost:55410/callback is not supported by client."

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.72
• Feedback ID: b1a6b237-ad30-4b98-afc7-f9e84292cb62

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/dceddia/.local/share/claude/versions/2.1.72 (expected in multi-process scenarios)\n    at byT (/$bunfs/root/src/entrypoints/cli.js:2612:2025)\n    at kEq (/$bunfs/root/src/entrypoints/cli.js:2612:1169)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-25T14:37:09.177Z"}]