Break the 1212-line pf-console-ui/src/shell.rs into a facade + shell/ subdir
(shell.rs stays the parent; `mod render;` resolves to shell/render.rs):
- shell/render.rs : the per-frame screen compose/transition path (Shell::render
+ the LayerEnv paint helper)
- shell/overlays.rs : the modal overlays (Shell::draw_overlays + draw_takeover)
- shell/tests.rs : the inline #[cfg(test)] module, extracted verbatim
The Shell struct + its public API + draw_aurora() stay in shell.rs (both children
reach draw_aurora + the private fields as descendants — no bumps). Sole visibility
change: draw_overlays -> pub(in crate::shell) (its caller Shell::render is now a
sibling). Zero re-exports needed (Shell/ConsoleOptions never leave the root). Pure
move; no behavior change.
Verified both platforms: Linux (home-worker-5) clippy -p pf-console-ui
(--all-targets -D warnings) + test; Windows (winbox, ASCII CARGO_HOME) clippy.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
