Follow-up to #695, greening the last nightly jobs it exposed. split gains a 400-tile product cap (a 100x100 split was a 10,000-file ZIP and ~20s of work). The settings-fuzz bounds its image inputs to 640px and gives the tools whose cost is output-driven (border, gif-tools, split) or codec-driven (heic/webp-to-avif) honest per-case budgets, since #649's settle-job wiring made every case wait for the real encode. The delete-team serial spec waits with toHaveCount(0) so the success toast can't trip strict mode, and type-to-search allows a route announcer's programmatic reading focus so it works on WebKit. Confirmed on a nightly dispatch: Extended Matrix (all 4 shards), Serial Bucket, Cross-Browser, and Coverage all green; Docker Container E2E's failures were GitHub runner reclamation (exit 137, tests passing throughout), which cleared on the #695 dispatch and is unaffected by this change.
Adds a dedicated remove-gif-background AI tool: removes the background from an animated GIF, WebP, or APNG frame by frame and reassembles a transparent (or composited) animation in WebP, APNG, or GIF, with full per-frame effects. Reuses the background-removal bundle. Verified end-to-end with the real rembg model.
Closes#496.
Move all fixture files from flat/mixed dirs (content/, media/, documents/,
formats/, hostile/, root loose) into the modality-first hierarchy:
image/{valid,formats,edge,hostile}, video/{valid,formats,hostile},
audio/{valid,formats,hostile}, document/{valid,formats,edge,hostile},
data/valid/, security/. Update index.ts paths, fixtureDir aliases,
all literal refs in 17 e2e/qa/script files, manifest.json, and the
three generator scripts. 163 files moved, 0 dropped, 100 new tests
from expanded document scan.
