fix terminal system lines to use server time

platform_web/utils/logTime.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from "vitest";
 
-import { formatTerminalLogTime } from "./logTime";
+import { formatTerminalLogTime, formatTerminalServerTime } from "./logTime";
 
 describe("formatTerminalLogTime", () => {
   it("uses the SCUM log clock instead of the browser timezone", () => {
@@ -11,4 +11,9 @@ describe("formatTerminalLogTime", () => {
   it("falls back to the event timestamp for generic logs", () => {
     expect(formatTerminalLogTime("not-a-timestamp")).toBe("时间未知");
   });
+
+  it("does not use the browser clock before the server clock is synchronized", () => {
+    expect(formatTerminalServerTime()).toBe("时间同步中");
+    expect(formatTerminalServerTime("2026-08-14T00:00:00Z")).toBe(formatTerminalLogTime("2026-08-14T00:00:00Z"));
+  });
 });