docs: point remaining src/ui.js references at their owners

The README source tree now lists src/ui/ instead of the removed
src/ui.js. docs/CODE-BOUNDARIES.md names src/ui/applicationShell.js as
the owner of panel layout, persistence and share restoration, and
docs/CURRENT-STATE.md places GLOBAL_POST_DEFAULTS in
src/ui/visualPresets.js. QA script comments and test assertion messages
that still named ui.js are updated the same way.

README.md

@@ -488,7 +488,7 @@ How the globe handles live data:
 ```
 src/
 ├── main.js                 # Bootstrap: Google 3D tiles, layer registration
-├── ui.js                   # Runtime UI — panels, HUD, styles, control facade
+├── ui/                     # Runtime UI — panels, HUD, styles, controls
 ├── hud.js                  # Intelligence HUD + AI scene summary
 ├── keySetup.js             # POWER UP panel — in-app provider keys (dev server only)
 ├── mapStackController.js   # Basemap switching — Google 3D / Esri / OSM / ion stacks