Moves every remaining hand-built error response onto ApiError: ~300
sites across faces, image, video, files, memories, versions,
duplicates, favorites, libraries, auth, clip/unified search, prefs,
reels, tts, insight chat, persona chat, knowledge and personas.
- 500s: the body was the error's text (anyhow / diesel / {:?}); now
ApiError::internal logs it and sends a generic message.
- Each 4xx/502/503 has a stable code and a message written for users;
statuses are unchanged. Shared helpers per module (faces_unavailable,
person_not_found, unknown_library, insight_not_found, ...).
- Pre-format top-level fields kept where clients read them: upload 409
duplicate_of / content_hash / library_name.
- PersonaChatError converts into ApiError in one place.
- Multipart upload errors use the format (error::multipart_config).
- Guard test: no non-test code builds HttpResponse::<error>() by hand.
Closes#202
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Cameron CordesandClaude Opus 5.5
431c3a7492