[Lynxifyy]

What this changes

The launcher's entire visual UI and the in-game Mod Menu UI are removed so a new UI can be dropped in later. Every system they sat on — engine, core managers, settings, mod systems — is kept and still compiles. This PR changes chrome only: no mod, engine or settings behaviour moves.

Net: ~112,000 lines deleted across the parent repo and the sweetloader submodule.

Before → after

app/src/main/res/layout/            94 layouts   →  20 layouts
app/src/main/java/…/ui/  (Java/Kt) 144 files     →  ~27 files (7 are placeholder Activities)
drawable names                    ~167          →  161
sweetloader/src/pl/menu/           6 sources    →  0
sweetloader/third_party/imgui/     14 files     →  0

The 20 kept layouts are the in-game HUD / game-host overlays — they are the mod systems, not launcher chrome. The 7 kept Activities (BaseActivity + Main/Splash/Library/Settings/ModsFullscreen/Crash) exist only as manifest and Intent targets; they draw nothing.

Scope

Launcher UI — delete the 12 screens, the widget kit, the nav/rail shell, the tabs and the splash art; delete the dead legacy drawables (splash_bg_*, launch_bg_*, bg_launch_*, bg_dock_*, ic_nav_*, nav_*) and the dead Widget.Caramel.NavTab / .NavRailTab / .QuickDock* styles.

In-game Mod Menu UI — the menu had three layers and all three are cut:

Layer	Removed
Native Dear ImGui	src/pl/menu/*, third_party/imgui/, the pl::menu::Frame call in PresentFrameEffect::OnPresentBoundary, the imgui CMake target + link, the NOTICE attribution
Java bridge	MinecraftActivity.kt wiring, InbuiltOverlayManager editor state
Launcher overlay widgets	the content panels and their tests

DebugMenuOverlay is the F3 overlay mod, not the menu — it stays.

Kept on purpose (a new UI will reuse them): UiTokens, Widget.Caramel.Card*, TextAppearance.Caramel.*, GlowDimens, the generic bg_*/ic_* drawables, PersonalizationManager, and every core.* system.

Submodule pin

sweetloader is bumped from fac14a2 to 3fda389 on branch chore/remove-in-game-menu (its own PR is open separately). The pin is a commit, so scripts/check_submodules.sh stays green.

Tests

Two tests pinned drawables this PR deletes; both were trimmed, not deleted:

• ButtonPressDrawableTest — now checks only the surviving button_accent.xml
• RadiusScaleTest — dropped the three removed surfaces from its list

The findViewById hygiene baseline is refreshed (32 → 29).

Verification

Gate	Result
./gradlew :app:testDebugUnitTest	3164 tests, 0 failures, 0 errors
./gradlew :app:lintDebug	clean
./gradlew :app:assembleDebug	SUCCESSFUL (clean .cxx rebuild, produces libsweetloader.so)
scripts/check_ui_hygiene.py	unchanged
submodule tests/cosmetics/run_tests.sh	all pass
submodule check_sources_listed.py / check_pinned_deps.py	pass