* Persist the custom dictionary across sessions (#40)
* Review fixes for #796: session-only Ignore All, desktop-only persistence, capped atomic I/O
- review.ignoreAll no longer adds to (and saves) the custom dictionary: ignored words go to a
separate session-only list, as Ignore All does in Word.
- Only the desktop app wires the dictionary file. Headless MCP and `wordcraft-cli run` keep
words in memory, so an agent never reads or changes the person's dictionary (and nothing
writes outside an automation write root, #769).
- Loading reads through `take(1 MB)`, so a huge file is never read whole; lines that aren't a
single word (spaces, control characters, invalid UTF-8, over 64 characters) are skipped.
- review.addToDictionary applies the same word rule (proof::custom_word), so a word added is
never dropped on the next load.
- Saving merges the words on disk first (another process's additions survive; words just
removed stay out), creates the folder, and replaces the file atomically (temp + rename).
The file I/O lives in the proof crate, so the engine doesn't touch std::fs itself.
- Tests for each.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Brandon Thomas <echelon@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
