fix(harvest): runlock stale-PID cleanup misparsed lock filename

Lock files are port-<port>.<pid>.lock (two dots); ${f##*.} yielded the
literal 'lock' instead of the PID, so the liveness check always failed
and ANY exiting harvest deleted sibling LIVE locks — with all locks gone
the last exiter then quit the site-shared browser out from under a
still-running sibling harvest (nikkei-world 09:24 exit killed the
browser mid nikkei-markets run; earlier 05:00 run likely degraded the
same way until the 60min watchdog TERM'd it at exit=143).

Parse correctly: basename minus .lock suffix, then last dot-segment.
Self-test: live lock survives, dead-PID lock cleaned.

bin/harvest.sh

@@ -70,13 +70,17 @@ mkdir -p "$_nh_lock_dir" 2>/dev/null || true
 _nh_port="${CDP_PORT_OVERRIDE:-$(nh_cdp_port "$(nh_login_site "$SOURCE")" 2>/dev/null)}"
 [ -n "$_nh_port" ] && touch "$_nh_lock_dir/port-${_nh_port}.$$.lock"
 _nh_quit_instance() {
-  local skill_dir f pid
+  local skill_dir f base pid
   rm -f "$_nh_lock_dir/port-${_nh_port}.$$.lock" 2>/dev/null
-  # 清理已被 kill -9 的任务留下的陈旧锁(锁名含 PID)
+  # 清理已被 kill -9 的任务留下的陈旧锁(锁名 port-<port>.<pid>.lock;
+  # 文件名含两个点,须先去 .lock 后缀再取最后一段,否则会误把活锁当陈旧锁删掉)
   for f in "$_nh_lock_dir"/port-"${_nh_port}".*.lock; do
     [ -e "$f" ] || continue
-    pid="${f##*.}"; pid="${pid%.lock}"
-    [ -n "$pid" ] && kill -0 "$pid" 2>/dev/null || rm -f "$f"
+    base="$(basename "$f" .lock)"
+    pid="${base##*.}"
+    if [ -z "$pid" ] || ! kill -0 "$pid" 2>/dev/null; then
+      rm -f "$f"
+    fi
   done
   # 同端口仍有其他采集任务在跑:不回收共享实例
   ls "$_nh_lock_dir"/port-"${_nh_port}".*.lock >/dev/null 2>&1 && return 0