Adds focused regression coverage for quote previews, markdown link rendering, embed toggles, and desktop/mobile post-menu actions. It also fixes the undefined feed-state crash in use-state-string.ts and removes unnecessary runtime imports with import type.
Board browsing, catalog filtering, post publishing, and reply publishing had little or no honest whole-repo coverage, which let route-level regressions and duplicated form side effects slip through. This pass adds targeted tests for those user flows and fixes the duplicate `PostFormTable` mounting bug they exposed.
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 hook coverage for cached directory hydration, alias lookup, and fallback behavior, plus broader Electron automation tests around hidden BrowserWindow upload flows and failure cases. useDirectoriesState() and related fallback paths now stay synchronized when the shared cache is already populated but the GitHub refresh fails.
Add Random/Preferred/None modes, preferred provider selection, and provider-order fallback. Catbox/Imgur/PostImages on Android via WebView; Electron CDP automation for Imgur/PostImages. Hide upload controls on web runtime.
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.