Fix passkey prompt in team invite signup flow

[josharian]

Author: philz42
Channel: #Weird signup flow
Link: https://discord.com/channels/1405685085923049482/1488279647014752387/1488657033455603772

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Issue

The team invite signup flow incorrectly offers to set up a passkey even when the user has already created one during the email verification step. This results in:

1. User is prompted to create a passkey when clicking team join link
2. After email verification, user is prompted again and creates a passkey
3. User is then shown the "optional: make a passkey" form again, despite already having one
4. The form should appear before being asked for a passkey, allowing users to specify a name

This is likely a bug specific to the team invite flow rather than standard signup.

Context

Browsers affected: Firefox with 1Password (1Password is aggressive about passkey popups)

Additional UI issues reported in same flow:

• Dashboard buttons (e.g., "profile") unclickable until page reload

Notes

• Need to test with Firefox and 1Password specifically
• May want to check if passkey detection is working correctly in the team flow