A 202 means the sync window expired while the job was still running. Tests treated it as a terminal pass: `if (isAsyncFallback(res)) return;` checked the envelope and returned, asserting nothing about the outcome and leaving the job running into the next test, which is the leak cancelAcceptedJobAndWait exists to prevent.
Because the window only expires under load, coverage tracked runner load. On CI 44 tests took this path and verified nothing; the same tests on a dev machine asserted in full (one measured 6.4s locally against 31s on CI).
settleAsyncFallback waits for a terminal state and asserts the job finished, and that a failure carries a message rather than being a crash. A clean failure stays valid, since the exotic-format fixtures are meant to be rejected. All 82 call sites moved over.
per-fork-env no longer floors SYNC_WAIT_MS, so forcing it to 0 drives every request through its 202 path. 570 tests were validated that way and matched their normal-window results exactly.
The 29-34s band dropped from 44 tests (23.4% of test time) to 6 (3.0%). Total test time rose 5.8% and CI wall went 12.8 to 13.1 min: the forks were doing real work during that wait, so this buys determinism, not speed. Per-shard totals unchanged at 9903 tests, 9435 passed, 468 skipped.
The fifth user-facing group is now Image, Video, Audio, PDF, Files
(internal modality id stays "file"; section.ts "files" was already
"Files"). Updates modality.ts label + comment, all 21 i18n locales
(categories.data "Data Files"->"Files", modalities.documentsAndFiles
"PDF & Data"->"PDF & Files", dead homePage.data), landing cards/hero
search/tools filter, docs headings, and e2e modality-tab assertions
(/^Data/ -> /^Files/, which had been failing).
#276's overhauled integration tests + QA sweep scripts hit the old
sectionless /api/v1/tools/<id> routes, which 404 after #280 made routes
section-prefixed. Ran scripts/rewrite-tool-paths.ts for literal URLs and
converted dynamic /api/v1/tools/${id} constructions to apiToolPath().
Negative-test paths (nonexistent/fake tools) intentionally left raw.
