增加流量不重置功能，ping改为tcpping

vite-frontend/src/pages/dashboard.tsx

@@ -341,7 +341,8 @@ export default function DashboardPage() {
   };
 
   const formatResetTime = (resetDay?: number): string => {
-    if (!resetDay) return '';
+    if (resetDay === undefined || resetDay === null) return '';
+    if (resetDay === 0) return '不重置';
     
     const now = new Date();
     const currentDay = now.getDate();
@@ -592,7 +593,7 @@ export default function DashboardPage() {
                      <p className="text-xs text-default-500 truncate">
                        {userInfo.flow === 99999 ? '无限制' : `${calculateUsagePercentage('flow').toFixed(1)}%`}
                      </p>
-                     {userInfo.flowResetTime && (
+                     {(userInfo.flowResetTime !== undefined && userInfo.flowResetTime !== null) && (
                        <div className="text-xs text-default-500 flex items-center gap-1">
                          <svg className="w-3 h-3" fill="currentColor" viewBox="0 0 20 20">
                            <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-12a1 1 0 10-2 0v4a1 1 0 00.293.707l2.828 2.829a1 1 0 101.415-1.415L11 9.586V6z" clipRule="evenodd" />
@@ -682,7 +683,7 @@ export default function DashboardPage() {
                              <span className={`px-2 py-1 rounded-md text-xs font-medium border ${tunnelExpStatus.bg} ${tunnelExpStatus.color}`}>
                                {tunnelExpStatus.text}
                              </span>
-                             {tunnel.flowResetTime && (
+                             {(tunnel.flowResetTime !== undefined && tunnel.flowResetTime !== null) && (
                                <span className="text-xs text-default-500">
                                  {formatResetTime(tunnel.flowResetTime)}
                                </span>