fix(m40): 评审 r1 — rebase 解冲突 + 宿主构建/可复验断言（无运行逻辑改动）

- rebase 到 main(b1acc90，含 M39 r1)：fw_content.conf 冲突取 launcherd 605e13a9、
  watchdog 37c57e0f；nyai 保持 main 的 ef7940ec（M39 6c6da79 已修，本单不再改该行）
- build_ncm_host.sh：SDK_SRC 补 meow_time32（否则链接 U meow_time32_monotonic_ms）；
  顺带补 meow_jpeg/meow_png_stream/meow_img_color，脚本端到端可构建
- build_sdk.sh / build_launcher.sh 加 -Wall -Wextra 并重编：0 warning，产物 md5 不变
  （meow_ui.a=86800633、meow_launcherd=605e13a9）
- 新增 sdk/test_time32_abi.sh：反汇编断言 4263≥1、4403=0（覆盖宿主 fallback 测不到的真机路径）
- 注释修正 sdk/meow_ui_repaint.c → .h
- P1-1（launcherd 只能刷固件；watchdog 可热更但需退出重进 App）为交付说明修正，无代码改动

patch_v2/ncm_app/build_ncm_host.sh

@@ -17,9 +17,9 @@ INC="-I. -I../sdk -I../meow_launcherd -Icore \
      -Ivendor/mbedtls/include -Ivendor/jsmn -Ivendor/qrcodegen/c -Ivendor/minimp3 -Ivendor/dr_flac"
 
 echo "==> host SDK objects"
-SDK_SRC="meow_ui_time meow_ui_gfx meow_ui_sys meow_ui_theme meow_ui_vol meow_ui_log meow_ui_widget \
+SDK_SRC="meow_time32 meow_ui_time meow_ui_gfx meow_ui_sys meow_ui_theme meow_ui_vol meow_ui_log meow_ui_widget \
          meow_ui_input meow_ui_activity meow_ui_dialog meow_ui_ime meow_ui_draw meow_ui_view \
-         meow_ui_img meow_ui_config meow_ui_nav meow_ui_media meow_notify_ipc meow_pinyin \
+         meow_ui_img meow_jpeg meow_png_stream meow_img_color meow_ui_config meow_ui_nav meow_ui_media meow_notify_ipc meow_pinyin \
          meow_ui_audio meow_ui_anim meow_ui_box meow_ui_scroll meow_ui_str meow_cachegov"
 for f in $SDK_SRC; do
   $CC_HOST -O2 -c -DMEOW_UI_HOST_TEST -I"$SDK_DIR" -I"$ROOT/patch_v2/meow_launcherd" \