Two issues with the per-subprofile (subcategory) export buttons:
1. Visibility was decided by a fuzzy `f.endswith("_" + suffix)` match against
the hidden-subcats set. A ghost "_blowjob" (empty-base leftover from the
trailing-slash folder bug) or an unrelated "mp4_no_clap" would match and
hide the wrong button — so enabling a subcategory in the Sub menu never
revealed its export button. Match the exact "<base>_<suffix>" folder name
instead (same name the menu shows and _hidden_subcats stores).
2. The buttons were crammed into the transport row after Export. Move them to
their own row with stretches on both ends so the (often many) "▸ name"
buttons stay centered and out of the transport controls.
Also cleared the polluted hidden_subcats/POV_Front set in the user's QSettings
(ghost "_*" names + a hide-all'd set of real "mp4_*"), so every subcategory is
visible again. Regression test added for the exact-match predicate.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Ethanfel
7ae1720b9e