用户消息系统：消息列表、订单群聊、联系对方入口

- 新增消息列表页和聊天详情页，支持 SSE 实时推送
- 订单详情页新增"联系对方"按钮，一键进入订单群聊
- 导航栏新增"消息"入口
- 修复 mobileHost 路径匹配 bug，避免 /m 前缀误匹配
- 优化 dev.sh：提取 mysql 辅助函数、修复空 PID 处理、条件检查依赖

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

scripts/dev.sh

@@ -102,6 +102,10 @@ cleanup() {
   fi
   CLEANED_UP=1
 
+  if [[ -z "${FRONTEND_PID}" && -z "${BACKEND_PID}" ]]; then
+    return
+  fi
+
   log "正在停止前后端开发进程..."
   if [[ -n "${FRONTEND_PID}" ]] && kill -0 "${FRONTEND_PID}" >/dev/null 2>&1; then
     kill "${FRONTEND_PID}" >/dev/null 2>&1 || true
@@ -131,16 +135,24 @@ wait_container_healthy() {
   exit 1
 }
 
+mysql_root() {
+  docker exec -i -e MYSQL_PWD=rootsecret hfb-mysql mysql -uroot "$@"
+}
+
+mysql_hfb() {
+  docker exec -i -e MYSQL_PWD=secret hfb-mysql mysql -uhfb "$@"
+}
+
 init_database() {
   if [[ "${RESET_DB}" == "1" ]]; then
     log_warn "重置数据库..."
-    docker exec hfb-mysql mysql -uroot -prootsecret -e \
+    mysql_root -e \
       "DROP DATABASE IF EXISTS hfb_sys; CREATE DATABASE hfb_sys CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;"
   fi
 
   local table_count
   table_count="$(
-    docker exec hfb-mysql mysql -uhfb -psecret -N -s -e \
+    mysql_hfb -N -s -e \
       "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = 'hfb_sys' AND table_name = 'users';" 2>/dev/null
   )"
 
@@ -149,12 +161,12 @@ init_database() {
     local migration
     for migration in "${ROOT_DIR}"/backend/migrations/*.sql; do
       log "执行迁移：$(basename "${migration}")"
-      docker exec -i hfb-mysql mysql -uhfb -psecret --default-character-set=utf8mb4 hfb_sys < "${migration}"
+      mysql_hfb --default-character-set=utf8mb4 hfb_sys < "${migration}"
     done
     log_success "数据库初始化完成"
   elif [[ "${SEED_ONLY}" == "1" ]]; then
     log "重新加载种子数据..."
-    docker exec -i hfb-mysql mysql -uhfb -psecret --default-character-set=utf8mb4 hfb_sys < "${ROOT_DIR}/backend/migrations/000002_seed.sql"
+    mysql_hfb --default-character-set=utf8mb4 hfb_sys < "${ROOT_DIR}/backend/migrations/000002_seed.sql"
     log_success "种子数据加载完成"
   else
     log "数据库已存在，跳过迁移（使用 --reset-db 重建）"
@@ -206,12 +218,12 @@ start_frontend() {
 
 watch_processes() {
   while true; do
-    if ! kill -0 "${BACKEND_PID}" >/dev/null 2>&1; then
+    if [[ -n "${BACKEND_PID}" ]] && ! kill -0 "${BACKEND_PID}" >/dev/null 2>&1; then
       wait "${BACKEND_PID}" || true
       printf "后端进程已退出\n" >&2
       exit 1
     fi
-    if ! kill -0 "${FRONTEND_PID}" >/dev/null 2>&1; then
+    if [[ -n "${FRONTEND_PID}" ]] && ! kill -0 "${FRONTEND_PID}" >/dev/null 2>&1; then
       wait "${FRONTEND_PID}" || true
       printf "前端进程已退出\n" >&2
       exit 1
@@ -222,8 +234,12 @@ watch_processes() {
 
 main() {
   need_cmd docker
-  need_cmd go
-  need_cmd npm
+  if [[ "${SEED_ONLY}" != "1" && "${NO_BACKEND}" == "0" ]]; then
+    need_cmd go
+  fi
+  if [[ "${SEED_ONLY}" != "1" && "${NO_FRONTEND}" == "0" ]]; then
+    need_cmd npm
+  fi
 
   trap cleanup EXIT
   trap 'cleanup; exit 130' INT TERM
@@ -252,8 +268,16 @@ main() {
   fi
 
   log_success "开发环境已启动"
-  log "前台：http://localhost:5173"
-  log "后台：http://localhost:5173/admin/login（admin / admin123456）"
+  if [[ "${NO_FRONTEND}" == "0" ]]; then
+    log "前台：http://localhost:5173"
+    log "后台：http://localhost:5173/admin/login（admin / admin123456）"
+  fi
+
+  if [[ -z "${BACKEND_PID}" && -z "${FRONTEND_PID}" ]]; then
+    log "仅启动 Docker 开发依赖，前后端未启动"
+    return 0
+  fi
+
   log "按 Ctrl+C 停止前后端；Docker 依赖会保留运行"
 
   watch_processes