Auto-RSVP when claiming a slot

Claiming a slot now also adds the person to the going list if they
aren't already there (case-insensitive name match).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

db/queries.sql

@@ -69,6 +69,9 @@ DELETE FROM rsvps WHERE id = ?;
 -- name: CountRsvps :one
 SELECT COUNT(*) FROM rsvps WHERE event_id = ?;
 
+-- name: GetRsvpByName :one
+SELECT * FROM rsvps WHERE event_id = ? AND name = ? COLLATE NOCASE LIMIT 1;
+
 -- name: GetUserByPhone :one
 SELECT * FROM users WHERE phone = ?;
 

db/queries.sql.go

@@ -321,6 +321,28 @@ func (q *Queries) GetEventBySlug(ctx context.Context, slug string) (Event, error
 	return i, err
 }
 
+const getRsvpByName = `-- name: GetRsvpByName :one
+SELECT id, event_id, name, note, created_at FROM rsvps WHERE event_id = ? AND name = ? COLLATE NOCASE LIMIT 1
+`
+
+type GetRsvpByNameParams struct {
+	EventID int64
+	Name    string
+}
+
+func (q *Queries) GetRsvpByName(ctx context.Context, arg GetRsvpByNameParams) (Rsvp, error) {
+	row := q.db.QueryRowContext(ctx, getRsvpByName, arg.EventID, arg.Name)
+	var i Rsvp
+	err := row.Scan(
+		&i.ID,
+		&i.EventID,
+		&i.Name,
+		&i.Note,
+		&i.CreatedAt,
+	)
+	return i, err
+}
+
 const getSession = `-- name: GetSession :one
 SELECT token, user_id, expires_at FROM sessions WHERE token = ? AND expires_at > CURRENT_TIMESTAMP
 `