docs(audit): UI 还原 + 性能审计报告;修登录假动画延迟

- 新增 UI 还原对比报告 / 性能审计报告(2026-06-19,14 块页面 + 6 块性能,逐项 file:line)
- auth-screen: 删除登录成功后 ~1.5s 人为进度动画延迟,凭证验过即进

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/frontend/src/routes/auth-screen.tsx

@@ -5,25 +5,13 @@ import { api, getRemember, setRemember as persistRemember } from "../api";
 import type { Team, User } from "../types";
 import type { AuthMode } from "./route-config";
 
-const LOGIN_PROGRESS_STAGE_MS = 520;
-
-type LoginProgress = "checking" | "verified" | "entering";
+type LoginProgress = "checking" | "entering";
 
 const LOGIN_PROGRESS_COPY: Record<LoginProgress, string> = {
   checking: "正在验证用户名和密码…",
-  verified: "验证成功，正在登录…",
   entering: "登录成功，正在进入 Airshelf"
 };
 
-function wait(ms: number) {
-  return new Promise((resolve) => setTimeout(resolve, ms));
-}
-
-async function completeProgressStage(startedAt: number) {
-  const remaining = LOGIN_PROGRESS_STAGE_MS - (Date.now() - startedAt);
-  if (remaining > 0) await wait(remaining);
-}
-
 type FieldErrors = {
   username?: string;
   password?: string;
@@ -92,15 +80,11 @@ export function AuthScreen({
     setError("");
     setLoginProgress("checking");
     try {
-      const checkingStartedAt = Date.now();
       const payload = await api.login({ username: username.trim(), password });
       // 记住我:勾选则存用户名 + 7 天有效期,token 落 localStorage;否则只存当前会话
       persistRemember(username.trim(), remember);
-      await completeProgressStage(checkingStartedAt);
-      setLoginProgress("verified");
-      await wait(LOGIN_PROGRESS_STAGE_MS);
+      // 凭证验过即进:不再做任何人为延迟动画。"进入"态由真实的 onAuthed(身份+数据水合)驱动。
       setLoginProgress("entering");
-      await wait(LOGIN_PROGRESS_STAGE_MS);
       await onAuthed({ ...payload, remember });
     } catch (err) {
       setLoginProgress(null);