test: update video generation tests for queued jobs and gallery redirects

CHANGELOG.md

@@ -1,3 +1,10 @@
+## [Unreleased] - 2026-09-03
+
+### Fixed
+
+- Fixed the backend video-generation test suite so it reflects the queue + background-worker architecture (POST `/generate/video` and `/generate/video/from-image` now queue jobs and return a `db_id`; the worker assigns the provider `job_id` and persists status transitions, and upstream OpenRouter errors mark jobs `failed`). All 120 backend tests pass.
+- Fixed the frontend test suite, which had become stale after the app-factory/blueprint/helpers refactor: mock target updated to the module that actually performs HTTP calls, per-request token validation stubbed, and video-job-submission tests updated to expect the gallery redirect. All 48 frontend tests pass.
+
 ## [Unreleased] - 2026-05-31
 
 ### Added