feat(crash): meow_crash 系统级崩溃捕获 (agent-187) — svcd 服务异常退出上报(AF_UNIX best-effort,不崩svcd)+dmesg增量扫segfault/oops; 落盘 TF MeowOS/logs/crash_<bootts>.log 无卡回退/tmp+迁移; CLI dump/tail; S89 预置 crash.conf(主会话补)

meow_crash 62781084; meow_svcd da6ebc66→605646c4(仅+68行上报挂点); 宿主5场景全过(上报链路/dmesg增量/无卡迁移/铁律验证/CLI)

patch_v2/meow_crash/build_crash.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+# build_crash.sh — meow_crash 交叉编译（mipsel 静态）+ 宿主编译可选。
+#
+# 目标：R3 Pro II / MeowOS（mipsel-linux-muslsf，静态）。meow_crash 极简无外部依赖，
+# 仅 POSIX + Linux 基础接口（同一套自管道/poll/AF_UNIX 模式，同 meow_svcd）。
+#
+# 用法：
+#   ./build_crash.sh           # 交叉编译 → patch_v2/meow_crash/meow_crash（mipsel 静态）
+#   ./build_crash.sh host      # 宿主编译 → patch_v2/meow_crash/meow_crash_host（集成测试用）
+set -e
+cd "$(dirname "$0")"
+ROOT="$HOME/Project/R3ProII"
+CC="$ROOT/.tools/zig-mipsel-cc"
+
+if [ "$1" = "host" ]; then
+    HOST_CC="${CC_HOST:-cc}"
+    "$HOST_CC" -Os -Wall -Wextra meow_crash.c -o meow_crash_host
+    echo "== host build =="
+    ls -la meow_crash_host
+    file meow_crash_host
+    exit 0
+fi
+
+"$CC" -Os -Wall -Wextra -static meow_crash.c -o meow_crash
+echo "== meow_crash (mipsel static) =="
+ls -la meow_crash
+md5sum meow_crash
+file meow_crash