Lost & found deck state machine

[jbourdin]

Feature ID: F4.17

Summary

Add a secondary state machine for deck loss/recovery tracking, with three transitions:

1. Mark as lost — owner (or staff for delegated decks) declares a deck missing
2. Mark as found — anyone reports the deck has been located (extends F4.16)
3. Mark as recovered — owner confirms physical recovery, returning to normal state

Behavior

• New lostStatus field on Deck (or Borrow): null → lost → found → recovered (or back to null)
• When a deck is marked as lost:
  • Visual indicator on the deck card and detail page
  • Active borrows are flagged (the deck may have been lost while lent)
  • Notification to relevant parties depending on borrow state
• When found: notification routed to the right person:
  • No active borrow → notify owner
  • Active borrow → notify borrower + owner
  • Delegated to staff → notify staff + owner
• When recovered: state resets, normal workflow resumes

Notification routing matrix

Deck state	Lost by	Found notification to	Recovered notification to
Available (no borrow)	Owner	Owner	Owner
Lent (active borrow)	Borrower	Borrower + Owner	Owner
Delegated to staff	Staff	Staff + Owner	Owner

Acceptance Criteria

• Lost/found/recovered state transitions with Symfony Workflow
• "Mark as lost" action for owner and staff
• "Mark as found" integrates with existing F4.16 found report flow
• "Mark as recovered" action for owner
• Notifications routed to the correct person(s) based on borrow state
• Visual indicators on deck cards and detail pages
• State history tracked (who, when, optional message)
• Translations for both en and fr

Notes

Builds on top of F4.16 (found deck notification). The current F4.16 implementation is notification-only with no state change — this feature adds the state machine layer.