[变更性质] feat(frontend)

[新增功能] 12 页面组件全量 shadcn：Card/Button/Table/Tabs/Select/Alert；375 底部 Tab Bar 改用 Tabs 组件实现
[实现方案] 页面级手写 class 全部移除（.btn/.banner/table.data/.badge/.tabs/.metric-row/.m-tile/.hint 等改为 shadcn + tailwind 工具类）；Modal/DatasetWizard/DatasetCard/DiffView/CodeEditor/Status/Layout 同步
[影响范围] src/pages/*.svelte、src/components/*.svelte

1 files changed, 63 insertions, 91 deletions

diff --git a/frontend/src/pages/AuthPages.svelte b/frontend/src/pages/AuthPages.svelte
index 88ca07a..da5d54c 100644
--- a/frontend/src/pages/AuthPages.svelte
+++ b/frontend/src/pages/AuthPages.svelte
@@ -92,114 +92,86 @@
   }
 </script>
 
-<section class="auth-wrap">
-  <Card.Root class="auth-card" role="main">
-    <div class="auth-brand">
-      <span class="mark" aria-hidden="true"></span>
-      <h1>策研 <span class="sub">Strategy Lab</span></h1>
-      <p class="hint">内部策略研究平台 · 仅限受邀成员</p>
+<section class="min-h-screen flex items-center justify-center p-6 min-w-0">
+  <Card.Root class="w-[min(400px,100%)] p-8 max-[768px]:p-7" role="main">
+    <div class="mb-4">
+      <span class="inline-block w-8 h-8 rounded-lg bg-primary mb-2" aria-hidden="true"></span>
+      <h1 class="text-xl font-semibold mb-1">策研 <span class="text-muted-foreground/70 font-medium text-[0.8rem]">Strategy Lab</span></h1>
+      <p class="text-sm text-muted-foreground max-w-[26em]">内部策略研究平台 · 仅限受邀成员</p>
     </div>
 
     {#if mode === 'register'}
       <form onsubmit={register}>
-        <div>
-          <Label for="inv">邀请令牌</Label>
-          <Input id="inv" bind:value={inviteToken} required autocomplete="off" />
-          <p class="hint">单次有效，来自管理员邀请</p>
-        </div>
-        <div>
-          <Label for="nm">姓名</Label>
-          <Input id="nm" bind:value={name} required autocomplete="name" />
-        </div>
-        <div>
-          <Label for="em">邮箱</Label>
-          <Input id="em" type="email" bind:value={email} required autocomplete="email" />
-        </div>
-        <div>
-          <Label for="pw">密码</Label>
-          <Input id="pw" type="password" bind:value={password} required autocomplete="new-password" minlength={8} />
-          <div class="hint">至少 8 位</div>
+        <div class="flex flex-col gap-4">
+          <div>
+            <Label for="inv">邀请令牌</Label>
+            <Input id="inv" bind:value={inviteToken} required autocomplete="off" />
+            <p class="text-sm text-muted-foreground mt-1">单次有效，来自管理员邀请</p>
+          </div>
+          <div>
+            <Label for="nm">姓名</Label>
+            <Input id="nm" bind:value={name} required autocomplete="name" />
+          </div>
+          <div>
+            <Label for="em">邮箱</Label>
+            <Input id="em" type="email" bind:value={email} required autocomplete="email" />
+          </div>
+          <div>
+            <Label for="pw">密码</Label>
+            <Input id="pw" type="password" bind:value={password} required autocomplete="new-password" minlength={8} />
+            <p class="text-sm text-muted-foreground mt-1">至少 8 位</p>
+          </div>
+          {#if resultError}<Alert variant="destructive">{resultError}</Alert>{/if}
+          <Button type="submit" disabled={busy}>{busy ? '创建中…' : '开通账户'}</Button>
+          <p class="text-sm text-muted-foreground">已有账户？ <a class="hover:underline" href="#/login">登录</a></p>
         </div>
-        {#if resultError}<Alert variant="destructive" class="bg-[var(--danger-soft)] border-[#f2c7c7]">{resultError}</Alert>{/if}
-        <Button type="submit" disabled={busy}>{busy ? '创建中…' : '开通账户'}</Button>
-        <p class="hint">已有账户？ <a href="#/login">登录</a></p>
       </form>
     {:else if mode === 'reset'}
       {#if done}
-        <Alert class="bg-[var(--brand-soft)] border-[#bfe9db]">{done}</Alert>
-        <p><a href="#/login">前往登录</a></p>
+        <Alert>{done}</Alert>
+        <p class="mt-2"><a class="hover:underline" href="#/login">前往登录</a></p>
       {:else}
         <form onsubmit={reset}>
-          <div>
-            <Label for="rt">重置令牌</Label>
-            <Input id="rt" bind:value={resetToken} autocomplete="off" />
-            <p class="hint">由管理员线下发放的恢复链接自动填入；不支持邮箱自动发送</p>
+          <div class="flex flex-col gap-4">
+            <div>
+              <Label for="rt">重置令牌</Label>
+              <Input id="rt" bind:value={resetToken} autocomplete="off" />
+              <p class="text-sm text-muted-foreground mt-1">由管理员线下发放的恢复链接自动填入；不支持邮箱自动发送</p>
+            </div>
+            <div>
+              <Label for="np">新密码</Label>
+              <Input id="np" type="password" bind:value={newPassword} required autocomplete="new-password" minlength={8} />
+            </div>
+            <div>
+              <Label for="np2">再输入一次新密码</Label>
+              <Input id="np2" type="password" bind:value={pw2} required autocomplete="new-password" minlength={8} />
+            </div>
+            {#if resultError}<Alert variant="destructive">{resultError}</Alert>{/if}
+            <Button type="submit" disabled={busy}>{busy ? '重置中…' : '重置密码'}</Button>
+            <p class="text-sm text-muted-foreground">想起密码了？ <a class="hover:underline" href="#/login">直接登录</a></p>
           </div>
-          <div>
-            <Label for="np">新密码</Label>
-            <Input id="np" type="password" bind:value={newPassword} required autocomplete="new-password" minlength={8} />
-          </div>
-          <div>
-            <Label for="np2">再输入一次新密码</Label>
-            <Input id="np2" type="password" bind:value={pw2} required autocomplete="new-password" minlength={8} />
-          </div>
-          {#if resultError}<Alert variant="destructive" class="bg-[var(--danger-soft)] border-[#f2c7c7]">{resultError}</Alert>{/if}
-          <Button type="submit" disabled={busy}>{busy ? '重置中…' : '重置密码'}</Button>
-          <p class="hint">想起密码了？ <a href="#/login">直接登录</a></p>
         </form>
       {/if}
     {:else}
       <form onsubmit={login}>
-        <div>
-          <Label for="le">邮箱</Label>
-          <Input id="le" type="email" bind:value={email} required autocomplete="email" />
-        </div>
-        <div>
-          <Label for="lp">密码</Label>
-          <Input id="lp" type="password" bind:value={password} required autocomplete="current-password" />
+        <div class="flex flex-col gap-4">
+          <div>
+            <Label for="le">邮箱</Label>
+            <Input id="le" type="email" bind:value={email} required autocomplete="email" />
+          </div>
+          <div>
+            <Label for="lp">密码</Label>
+            <Input id="lp" type="password" bind:value={password} required autocomplete="current-password" />
+          </div>
+          {#if resultError}<Alert variant="destructive">{resultError}</Alert>{/if}
+          <Button type="submit" disabled={busy}>{busy ? '登录中…' : '登录'}</Button>
+          <p class="text-sm text-muted-foreground">
+            开通新账户需要管理员邀请： <a class="hover:underline" href="#/register">用邀请令牌注册</a>
+            {#if route.query.get('invite')}<span>（邀请令牌已自动填入）</span>{/if}
+          </p>
+          <p class="text-sm text-muted-foreground">忘记密码？请联系管理员获取 <a class="hover:underline" href="#/reset">恢复链接</a></p>
         </div>
-        {#if resultError}<Alert variant="destructive" class="bg-[var(--danger-soft)] border-[#f2c7c7]">{resultError}</Alert>{/if}
-        <Button type="submit" disabled={busy}>{busy ? '登录中…' : '登录'}</Button>
-        <p class="hint">
-          开通新账户需要管理员邀请： <a href="#/register">用邀请令牌注册</a>
-          {#if route.query.get('invite')}<span>（邀请令牌已自动填入）</span>{/if}
-        </p>
-        <p class="hint">忘记密码？请联系管理员获取 <a href="#/reset">恢复链接</a></p>
       </form>
     {/if}
   </Card.Root>
 </section>
-
-<style>
-  .auth-wrap {
-    min-height: 100vh;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    padding: 1.5rem;
-    /* grid place-items center sizes the implicit track to the card's fixed
-       width so max-width:100% never engaged (375px probe: 47px doc overflow);
-       flex + min() keeps the resolved card width inside the padded viewport */
-    min-width: 0;
-    background:
-      radial-gradient(700px 350px at 85% -60px, rgba(13, 148, 136, 0.08), transparent),
-      var(--bg);
-  }
-  :global(.auth-card) { width: min(400px, 100%); padding: 2rem 1.75rem 1.8rem; }
-  /* round2 登录页留白重排：标题区与表单拉开，卡片下缘留呼吸感 */
-  @media (min-width: 768px) {
-    :global(.auth-card) { padding: 2.4rem 2.2rem 2.1rem; }
-  }
-  .auth-brand { margin-bottom: 1.35rem; }
-  .auth-brand h1 { margin-bottom: 0.3rem; }
-  .auth-brand p { max-width: 26em; }
-  .mark {
-    display: inline-block;
-    width: 34px;
-    height: 34px;
-    border-radius: 9px;
-    background: var(--teal-strong);
-    margin-bottom: 0.6rem;
-  }
-  .sub { color: var(--text-3); font-weight: 500; font-size: 0.8rem; }
-</style>