The Deck PUT API is a full replacement, not a partial update.
Previously, title and description were conditionally sent, causing:
- 400 errors when title not provided (it's required)
- Description being cleared when not explicitly set
Now all required fields (title, type, owner) and description are
always included in the payload using current card values when not
explicitly provided. This matches the existing pattern for type/owner.
Also simplified owner extraction since DeckCard.validate_owner
already ensures it's always a string.
Fixes#452🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
