getCategoryWithPartsInner had parent gates for PSA (psa::/json-vin-main-groups),
pcat (hasSubgroups), pl24 link_wid *Group* tables, Volvo (vin-group.action) and
emex — but P4 VIN/legacy group nodes whose link_wid is a positional code
("1","2","CAP1"…) and whose path is a *…group.action* drill (Ford
json-vin-sub-group, Nissan/Opel json-sub-group, etc.) matched none of them. They
fell through to the leaf parts path, fetched no parts and rendered a silent empty
panel — the dominant current '0 parça' cluster (mekanik/kaporta/Elektrikli aksam…
across many vehicles; PostHog-confirmed). Add a gate that drills any pl24
…group.action node (excluding Volvo's own vin-group.action branch) → subgroups or
retryable loadError. Lazy-heals existing flag-less rows, no reseed.
Also set has_subgroups at seed time: PSA scopes → true (always parents);
P4-legacy cats → true when linkPath is a …group.action drill. Fixes folder
signposting + lets prefetch pre-drill them instead of treating them as leaves.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Semih Yesilyurt
e6c8c9c32e