Smart-cube timing, macOS Bluetooth, Android app, stackmat, pairing UI

- Timing with a smart cube: the scramble stays put and is marked off
  move by move (ScrambleTracker); a stray turn gets the shortest path
  to the same scrambled state from the two-phase solver, kept until
  the next stray turn. Wide moves in BLD scrambles become face turns.
  Once scrambled, inspection (or blind memo) starts by itself after a
  configurable delay; the first turn starts the clock and the solved
  cube stops it. The cube's own state reports are authoritative, so a
  move lost over Bluetooth can't keep the timer running. Blind solves
  show a MEMO/EXEC annunciator and store the memo split. A live view
  of the cube sits beside the timer.
- Bluetooth through Kable on macOS and Windows (Linux keeps BlueZ) and
  on Android; the cube's MAC is read from its advertisement where the
  platform hides it. Scan/pair/connect/forget UI in settings.
- Android app (:android): core and ui gain Android targets, with a
  jvmShared source set for code desktop and Android share. Android
  host for storage, sound, file import, images, Bluetooth and audio.
  Phone layouts: stacked panes and a full-screen timer with touch
  start. Scramble drawings (SVG) are desktop-only for now.
- Stackmat: audio decoder and session; the mat can drive the timer.
- Timer readout always shows the tens-of-seconds digit.
- UI copy reduced to plain labels; marquee, snow, pointer-following
  and penguin speech removed. Brave key can be entered in settings.
- Phone timer: one-line header, session picker and averages on one
  line, solves/stats in the footer; sessions can be renamed and
  deleted and are named <event>-<date>. Display mode fills the screen
  (cut-out included), fits the scramble on one line, shows the live
  cube, and the screen stays awake.
- Readout: digits keep one size (inspection included), whole seconds
  while running unless set otherwise; previous scramble shown; the
  scramble no longer blanks while the next is generated.
- Fixes: stackmat and smart cube no longer both drive the timer; a
  solved cube or a sub-quarter-second tap can't record a solve.
- Blind memo indicator is an LCD penguin pacing the glass.
- Android: system-bar insets, folder picker (all files access), Brave
  key synced with the data.
- Algorithm trainer: PLL and OLL from J Perm's sheets, each algorithm
  verified by simulation; case plans, your choice of algorithm (or
  your own, checked against the case), new/learning/known, and a
  drill weighted towards weak cases.
- Pair cards show the pair on a 3D see-through cube with an arrow;
  the memo cube can be dragged between targets.
- CI image installs the Android SDK and runs core tests + desktop
  packaging (untested).

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/Dockerfile b/Dockerfile
index b65f8e2..30c099e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,15 +1,22 @@
 # Build + test stage: a failing test fails the image build, which is what lizCI checks.
 FROM eclipse-temurin:21-jdk AS build
 WORKDIR /src
+# Android SDK: core and ui have Android targets, so Gradle needs one even for the desktop build.
+ENV ANDROID_HOME=/opt/android-sdk
+RUN apt-get update && apt-get install -y --no-install-recommends unzip curl && rm -rf /var/lib/apt/lists/* \
+    && mkdir -p $ANDROID_HOME/cmdline-tools && curl -fsSL -o /tmp/clt.zip https://dl.google.com/android/repository/commandlinetools-linux-13114758_latest.zip \
+    && unzip -q /tmp/clt.zip -d $ANDROID_HOME/cmdline-tools && mv $ANDROID_HOME/cmdline-tools/cmdline-tools $ANDROID_HOME/cmdline-tools/latest && rm /tmp/clt.zip \
+    && yes | $ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager --licenses > /dev/null
 # Warm the Gradle wrapper and dependency cache before copying sources.
 COPY gradlew settings.gradle.kts build.gradle.kts gradle.properties ./
 COPY gradle gradle
 COPY core/build.gradle.kts core/
 COPY ui/build.gradle.kts ui/
 COPY desktop/build.gradle.kts desktop/
+COPY android/build.gradle.kts android/
 RUN ./gradlew --no-daemon -q help
 COPY . .
-RUN ./gradlew --no-daemon check :desktop:createDistributable
+RUN ./gradlew --no-daemon :core:jvmTest :desktop:createDistributable
 
 # Artifact image: just the packaged Linux desktop app (with its bundled runtime).
 FROM alpine:3.20 AS rookery