Namespaces were shared across features: `settings` was written by core, the
panel and touch, and `input` by touch and buttons. That made "does this
firmware implement the whole feature?" a question no pointer could answer.
Each namespace now belongs to exactly one feature or to core, so a feature is
a provider pointer and the compiler validates completeness:
gui, node -> screen, tree, under the screen feature
settings -> screen (rotation, theme), sys (timezone),
touch (calibration)
input -> touch, buttons
Runtime::open() no longer requires a GuiProvider; a firmware without one runs
with no screen/tree globals and reports sys.hasFeature("screen") false.
Rotation is one value again: GuiProvider::setRotation applies and persists, so
an app rotating the panel transiently puts the old value back itself.
The Lua modules were split between tabs and spaces because nothing pinned a
style; .editorconfig is what lua-language-server reads on save, so the editor
and the tree now agree. clang-format already had a config and left native/
unchanged. Embedded modules regenerate from the reformatted ui.lua.
ui.lua and hints.lua are compiled to LUA_32BITS bytecode (matching the
firmware's Lua build) and linked into the binary. A new package.searchers
entry checks them as the fallback after the SD card, so a local
/.lua/lib/ui.lua still shadows the packaged one for debugging.
Bytecode is ~40% smaller than source and loads without parsing. A fresh
SD card with no make sdcard now has the platform available.
evan