Sub2API 2.19.2.1 · TopAPI custom

Based on ranxi2001/sub2api v2.19.2, integrated through #43 at commit 87c6ec8.

Includes upstream account performance monitoring, OpenAI authorization connections, upstream channel entities, recharge lottery and queue timing improvements. Existing TopAPI recharge gifts, package cards, enterprise contact/QR dialog, DesktopAuth, daily check-in and ImageWorkbench group routing are preserved.

Validation: frontend lint/typecheck and 1,725 tests; Go service, admin, server/routes/middleware tests; Go build/vet; frontend production build. The handler suite had one timing threshold failure under parallel load; its isolated rerun passed. Independent integration review found no blocking issues.

Linux amd64 artifacts were built locally from the merged commit because fork Actions remain unavailable. The archive includes the embedded frontend. Verify with checksums.txt; release-manifest.json records the exact source commit.