src/app.rs had grown to 3,700 lines, ~2,400 of them a single impl App
block. Move it to src/app/mod.rs and spread the behaviour across eleven
child modules grouped by feature: workspace, grammar, spelling, beats,
find, editor, autocomplete, file_list, ui, style and util.
The new modules are children of app rather than siblings, so they still
reach App's private fields without widening its interface; methods and
free helpers that are now used across module boundaries are marked
pub(super). mod.rs keeps the state types, App::new and the eframe::App
update loop.
This is pure code motion - every non-blank line of the original file
reappears exactly once, and the only edits are the pub(super) markers,
the module scaffolding, and rewrapping five signatures that the added
prefix pushed past 100 columns. Largest file is now editor.rs at 520
lines. Tests still 56/56, and cargo clippy --release reports the same
five warnings as before the split.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GBWj9TphFMCoh7VHaSRnvQ
landon
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