The label multiselect was gated on the pond already having labels — but
before a first import that is the common case, so the section silently
vanished and no import-wide label could be chosen. Render the fieldset
unconditionally (with a hint when empty) and add an inline create
field: POST the new label directly to get its id back, refresh the
shared label query, and tick it right away. Same pond_admin permission
as the dialog itself.
The e2e pack now creates its label through the dialog instead of the
API, covering exactly the empty-pond path that slipped through.
Fixes#121
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Fb2VzvcoBPHkjh8bZ6PzQn