Adds broad coverage across stores, hooks, and runtime utilities while switching `vitest.config.ts` to an explicit whole-repo include list. This turns the coverage report into a real repo-wide baseline instead of an imported-file subset.
Added focused tests for settings flows, subscription behavior, and route helpers, and fixed the account import success path those tests exposed in account-settings.tsx.
Updated the canonical board mod queue URL to /:boardIdentifier/mod/queue and made legacy /:boardIdentifier/modqueue paths resolve to not found. Tightened route helpers so board-scoped mod URLs no longer fall through as generic board pages.
Backend retention now keeps only recent posts, making the time filter UI
and newerThan filtering obsolete. Deleted use-time-filter hook, canonical
multiboard routes only, removed footer suggestions, dropped i18n keys.
Added `useFileUpload()` and `uploadToCatbox()` to centralize upload behavior and remove duplicated upload code from `post-form.tsx` and `reply-modal.tsx`. The flow now routes Android to `FileUploader`, Electron to hidden-input + catbox upload, and web to a translated fallback alert with consistent upload UI state.