Fix CI apk build

scripts/sync-android-sources.sh

@@ -41,4 +41,30 @@ if [ -f "$APP_GRADLE_SRC" ]; then
     echo "  Copied: app/build.gradle.kts"
 fi
 
+# Custom ProGuard/R8 keep rules. Required for minified release builds:
+# the player/ and security/ Kotlin classes are loaded by name via JNI from
+# Rust, so R8 can't see the references and would strip them without this.
+# build.gradle.kts globs **/*.pro, so dropping it in app/ is enough.
+PROGUARD_SRC="$PROJECT_ROOT/src-tauri/android/app/proguard-jellytau.pro"
+PROGUARD_DST="$PROJECT_ROOT/src-tauri/gen/android/app/proguard-jellytau.pro"
+if [ -f "$PROGUARD_SRC" ]; then
+    cp "$PROGUARD_SRC" "$PROGUARD_DST"
+    echo "  Copied: app/proguard-jellytau.pro"
+fi
+
+# Launcher icons / adaptive-icon mipmaps. `tauri android init` generates
+# low-quality launcher icons from tauri.conf.json (which has no high-res
+# Android source), so overwrite them with the real committed mipmaps.
+RES_SRC="$PROJECT_ROOT/src-tauri/android/src/main/res"
+RES_DST="$PROJECT_ROOT/src-tauri/gen/android/app/src/main/res"
+if [ -d "$RES_SRC" ]; then
+    for dir in "$RES_SRC"/mipmap-*; do
+        [ -d "$dir" ] || continue
+        name="$(basename "$dir")"
+        mkdir -p "$RES_DST/$name"
+        cp "$dir"/* "$RES_DST/$name/"
+        echo "  Copied res: $name"
+    done
+fi
+
 echo "✓ Android sources synced successfully"

src-tauri/android/app/proguard-jellytau.pro

@@ -0,0 +1,14 @@
+# JellyTau custom keep rules.
+#
+# These classes are loaded by name from the Rust backend via JNI
+# (env.find_class / class-loader lookups), so R8 cannot see the
+# references and would otherwise strip or rename them in a minified
+# release build — causing an instant ClassNotFoundException crash on
+# startup. See src-tauri/src/player/android/mod.rs and
+# src-tauri/src/credentials.rs.
+-keep class com.dtourolle.jellytau.player.** { *; }
+-keep class com.dtourolle.jellytau.security.** { *; }
+
+# Media3 / ExoPlayer is accessed reflectively in places; keep it intact.
+-keep class androidx.media3.** { *; }
+-dontwarn androidx.media3.**

src-tauri/android/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@mipmap/ic_launcher_background"/>
+  <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+  <monochrome android:drawable="@mipmap/ic_launcher_monochrome"/>
+</adaptive-icon>