android: the phone, on the real core — the mockup shell, playback, the media card, the catalog, the resolver, Save, the dev flavour

The same Tauri 2 project builds for Android: mobile.html as a third Vite
entry (src/mobile/, the mockup on real data), tauri.android.conf.json, the
mobile stubs (updater, lyric alignment, vocal separation), rustls reqwest
on Android, the AAudio buffer, and a hand-driven detour build
(src-tauri/android/{env,build,deploy,dev}.sh) while Developer Mode is off.
ANDROID.md is the recipe.

Playback: the media-session plugin crate (lock-screen card, MediaStyle
notification, audio focus, headset buttons, a foreground service that
promotes itself first — Android 14 kills the app otherwise), session
restore across reload and restart, solid chrome after measuring the
backdrop-filter lag.

The catalog: Search is the desktop's top bar (the top-result rule, artist
cards), the artist page and the record page are the desktop's, Home is the
desktop's landing page, Gaps per followed shelf. Playing goes through the
desktop's own source rules, moved verbatim from state.svelte.js into
src/lib/sources.js so both apps share one resolver; the phone readies the
next three tracks and crosses boundaries gapless. Save fetches a record or
a track into the library by the download rules; Transfers shows the
burst. The raw Soulseek search stays, offered on request, a peer's copy
streaming with the lane rising as the bytes arrive. Community is the
Soulseek side (rooms, chat, buddies); the private layer waits.

The opener and storage plugins (social links, the picked library folder,
all-files access), the volume normalization switch, and the harness:
tests/mobile/smoke.mjs walks the mock (a fake network behind
src/lib/events.js) and the real phone over CDP, perf.mjs measures frames.

src-tauri/android/env.sh

@@ -0,0 +1,23 @@
+# The Android toolchain, for the detour scripts (build.sh, dev.sh). Sourced,
+# never run. A bash session started before the user variables were set does
+# not see them, so everything is spelled out here.
+SDK="$(cygpath -u "$LOCALAPPDATA")/Android/Sdk"
+NDKV=28.2.13676358
+BIN="$SDK/ndk/$NDKV/toolchains/llvm/prebuilt/windows-x86_64/bin"
+export ANDROID_HOME="$(cygpath -w "$SDK")"
+export ANDROID_SDK_ROOT="$ANDROID_HOME"
+export NDK_HOME="$(cygpath -w "$SDK/ndk/$NDKV")"
+export ANDROID_NDK_HOME="$NDK_HOME"
+export ANDROID_NDK_ROOT="$NDK_HOME"
+export JAVA_HOME="C:\Program Files\Java\jdk-17"
+export CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER="$(cygpath -w "$BIN/aarch64-linux-android26-clang.cmd")"
+export CC_aarch64_linux_android="$(cygpath -w "$BIN/aarch64-linux-android26-clang.cmd")"
+export CXX_aarch64_linux_android="$(cygpath -w "$BIN/aarch64-linux-android26-clang++.cmd")"
+export AR_aarch64_linux_android="$(cygpath -w "$BIN/llvm-ar.exe")"
+export PATH="$SDK/platform-tools:$PATH"
+# tauri-build regenerates gen/android/tauri.settings.gradle and
+# app/tauri.build.gradle.kts — the lines that include every plugin's Android
+# module — ONLY when the CLI's variable names the project. Without it a new
+# plugin (the media session) compiled fine and never reached the APK.
+export TAURI_ANDROID_PROJECT_PATH="$(cygpath -w "$PWD/src-tauri/gen/android")"
+ADB="$SDK/platform-tools/adb.exe"