F1.13 — Play Pokemon QR scan for player identification at events

[jbourdin]

Split from #184 (F1.12)

Summary

Scan a player's Play! Pokemon QR code at an event to quickly identify them for borrowing workflows. This is the core use case extracted from F1.12, focused on the borrowing/event context only.

Details

QR code content

The Play! Pokemon app displays a QR code containing a JWT token with player identity data (name, player ID).

PlayPokemonQrDecoder service

• Decode and validate the JWT from the QR payload
• Extract player name and Pokemon Player ID
• Match against existing users by `playerId` field

Use case: Player identification at events

• Staff scans a player's QR at an event (using camera scanner from F5.6)
• System looks up the player by Pokemon ID
• Shows their profile, active borrows, and deck assignments
• Enables quick hand-off confirmation for deck lending

Dependencies

• F5.6 — Camera QR scan (F5.6 — Camera QR scan (mobile fallback) #174)

NOT in scope (stays in #184 for Phase F)

• Quick account creation from QR
• Staff assignment from QR

Acceptance Criteria

• PlayPokemonQrDecoder service parses Play Pokemon JWT
• Player lookup by Pokemon ID from decoded JWT
• Integration with event borrowing workflow
• Works with camera QR scanner (F5.6)