The modal's default-bucket logic dropped new cards into the current
real bucket when opened from one. Calendar-created appointments
(body pre-seeded with #termin / #geburtstag) would then land in e.g.
"work" instead of living bucket-less as calendar entries should.
Detect the pre-filled tag on open and force inpBucket empty for
those; regular new cards still inherit the active bucket.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>