Restructure the plot dialog into a style-manager-style master/detail: a
left list of page setups plus a right settings editor. The list shows
<none> (defaults + PDF) and <previous> (the settings the dialog opened
with), then the drawing's layouts (*Model*, *Layout1*, …) and its
standalone named page setups.
- Named page setups live in the ACAD_PLOTSETTINGS dictionary
(src/scene/page_setup.rs: names/get/save/delete/rename, creating the
dictionary if absent); DWG round-trip verified.
- Toolbar New / Copy / Delete | Set current / Preview / Print. Selecting
a row loads it into the editor; Set current writes to the active
layout. Copy duplicates a layout or a setup into a new named setup;
Delete/Rename apply only to named setups.
- Scene::plot_settings_for(name) generalizes effective_plot_settings so
any layout's settings can be loaded; on open the settings are
snapshotted for <previous>.
- Default selection: model space → <none>; a layout → its own setup.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Break up the four giant files (~29k lines total) into focused submodule
directories, one concern per file. Pure mechanical moves — behavior is
unchanged.
- app/update.rs (9650) -> app/update/{mod,viewport,command,style,file,
dynamic,dialog,util}. The 384-arm update_inner match stays in mod.rs
with thin delegating arms; the 66 fattest arm bodies move to topic
methods. Arm set preserved exactly (384 -> 384).
- scene/mod.rs (9017) -> scene/{mod,entity,tess,hittest,layout,paper,
mspace,project,selection,modify,group_layer,preview}. The impl Scene
body is split across files via inherent-impl-per-file; struct, ctor,
fields and load-time helpers stay in the root. fn count 123 -> 123.
- app/commands.rs (6082) -> app/commands/* grouped by command family.
The 233-arm dispatch match becomes source-ordered per-family
dispatch_* handlers, preserving first-match precedence (233 -> 233).
- app/view.rs (4686) -> app/view/{mod,overlay,modal,viewcube,controls}.
Largest file drops from 9650 to 3343. Builds clean; app launches and
loads plugins with no panic.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
