feat: M6.40批 — 阅读器UI改版(书架list·grid+空态骨架+界面设置+App设置页+header·footer+背景黑默认) + 系统级音量翻页映射 + P1 MD3(select面板28/对话框按钮胶囊) + MeowPanel写端点护栏 + SDK公开仓·文档同步

- reader: app.c/shelf.c/reader.c 全套UI; 新增 reader_conf(reader.conf)/settings(App设置页)/reader_ipc(音量翻页IPC响应); app.json加volume_page
- launcher: keys.c meow_volpage_*门 + util.c app_id→fd映射(HELLO记fd/断开清) + app_launcher.c 前台三处接线(进入sink/按键路径volpage_key/离开clear) → 前台声明volume_page的App音量键→MSG_KEY_PAGEUP/PAGEDOWN翻页(非阅读器前台音量照旧)
- sdk: meow_select.c 底部面板28 + meow_ui_dialog.c 对话框按钮胶囊(h/2) + test_meow_ui_select.c修采样
- meowpanel: /api/net/policy·/api/power/policy 加防自锁+policy默认关两条护栏(panel.policy_enabled默认0)
- 文档: MEOW_APP_SDK.md §12.6 + meowpanel README端点表

0warning;宿主测试全过;二进制留批量批次未入库

patch_v2/reader_app/build_reader.sh

@@ -131,8 +131,8 @@ timeout 150 qemu-mipsel ./test/formats_smoke_mipsel "${FONT:-$ROOT/font/src/MiSa
 echo "==> reader binary"
 CORE_L="core/rdenc.c core/rdlayout.c core/rdtxt.c core/rdxml.c core/rdhtml.c core/rdsb.c core/rdzip.c core/rdsrc.c core/rdepub.c core/rdfb2.c core/rdmobi.c core/rdcbz.c"
 ENGINE_L="engine/rdft.c"
-APP_L="app.c app/shelf.c app/reader.c app/book.c app/progress.c"
-$CC -Os -static -Wall -Wextra -I../sdk -I. -Icore -Iapp -Iengine $FT_INCS $COREINC \
+APP_L="app.c app/shelf.c app/reader.c app/book.c app/progress.c app/settings.c app/reader_conf.c app/reader_ipc.c"
+$CC -Os -static -Wall -Wextra -I../sdk -I../meow_launcherd -I. -Icore -Iapp -Iengine $FT_INCS $COREINC \
   $CORE_L $APP_L $ENGINE_L "$OBJ"/mz_*.o "$OBJ"/lm_*.o "$OBJ"/rdimg.o \
   ../sdk/meow_ui.a "$SYSROOT/lib/libz.a" "$FT_BUILD/libfreetype.a" -lpthread -o reader
 ls -la reader