fix(lyric/bt): ①桌面歌词页封面不显示修复(根因:歌词页从不画封面+scrim逐秒叠涂压黑→新增np_draw_lyric_coverbg封面背景+1s整页重绘;播放页封面宿实证非批5破坏) ②alsa.conf pcm.bluealsa DEV自动识别(bt_dev.c:audiod BT打开时bluealsa-cli检测a2dpsrc设备幂等改写DEV=保留codec/ldac_eqmid等);test_bt_dev 14/14,0warning

patch_v2/meow_audiod/build_audiod.sh

@@ -28,12 +28,15 @@ if [ "$1" = "host" ]; then
     HOST_CC="${CC_HOST:-cc}"
     # BT 目标直链宿主 libasound.so.2（无 asoundlib.h，原型内联于 meow_audiod.c；-l: 精确到版本，
     # 不依赖 unversioned dev 链接）。删 -ldl：BT 不再用 dlopen。
-    "$HOST_CC" $INC -Os -Wall -Wextra meow_audiod.c -o meow_audiod_host -lpthread -l:libasound.so.2
+    "$HOST_CC" $INC -Os -Wall -Wextra meow_audiod.c bt_dev.c -o meow_audiod_host -lpthread -l:libasound.so.2
     "$HOST_CC" $INC -Os -Wall -Wextra meow_audio.c  -o meow_audio_host -lm
     "$HOST_CC" $INC -Os -Wall -Wextra test_audiod_host.c -o test_audiod_host -lm
+    "$HOST_CC" -Os -Wall -Wextra test_bt_dev.c bt_dev.c -o test_bt_dev -lm
     echo "== host builds =="
-    ls -la meow_audiod_host meow_audio_host test_audiod_host
-    file meow_audiod_host meow_audio_host test_audiod_host
+    ls -la meow_audiod_host meow_audio_host test_audiod_host test_bt_dev
+    file meow_audiod_host meow_audio_host test_audiod_host test_bt_dev
+    echo "== host regression (test_bt_dev: BT DEV auto-detect) =="
+    ./test_bt_dev || { echo "!! test_bt_dev FAILED"; exit 1; }
     echo "== host regression (test_audiod_host) =="
     ./test_audiod_host || { echo "!! host regression FAILED"; exit 1; }
     exit 0
@@ -56,7 +59,7 @@ mkdir -p "$LIBBT"
 if [ ! -f "$LIBBT/libasound.so.2.0.0" ]; then cp "$ASOUND_SRC" "$LIBBT/libasound.so.2.0.0"; fi
 ln -sf libasound.so.2.0.0 "$LIBBT/libasound.so"
 ln -sf libasound.so.2.0.0 "$LIBBT/libasound.so.2"
-"$ZIG" cc --target=mipsel-linux-gnueabihf.2.22 $INC -Os -Wall -Wextra meow_audiod.c -o meow_audiod \
+"$ZIG" cc --target=mipsel-linux-gnueabihf.2.22 $INC -Os -Wall -Wextra meow_audiod.c bt_dev.c -o meow_audiod \
     -lpthread -Llibbt -lasound
 echo "== meow_audiod (mipsel glibc-dynamic, BT links libasound.so.2) =="
 ls -la meow_audiod