- Root bug: incomplete rules (the ready rule, every new group's first
rule) were sent to the server — the live-count fetch toasted a 400
and every suggestion fetch failed silently (why author typing showed
no dropdown). Fix: completedTree() prunes incomplete rules and empty
groups; the count fetch skips when nothing is complete, suggestion
fetches send only the other COMPLETED rules, and serialization wires
only completed rules (an unfinished rule was never a filter).
- Group remove button was x-show'd away on depth-0 groups — exactly
where user groups live. Always visible now.
- Field menu: filter input at the top (Enter prevented), no-match
state; group headers restyled as flush-left tinted sticky bands with
options tabbed in beneath (user's layout pick).
- toast.ts: filter-count fetches join the suggestion-fetch exemption
(a failed background hint never interrupts).