refactor: 优化仪表盘权限和 UI 样式

- 普通用户仪表盘隐藏提供商统计相关信息
- 为普通用户新增每日使用趋势折线图
- 登录对话框 UI 样式优化（Logo 放大、圆角统一）
- 输入框组件样式微调
- 将项目名称从 "API Gateway" 改为 "AI Gateway"

frontend/src/api/dashboard.ts

@@ -220,14 +220,14 @@ export interface DailyStat {
   cost: number
   avg_response_time: number // in seconds
   unique_models: number
-  unique_providers: number
+  unique_providers?: number // 仅管理员返回
   model_breakdown: ModelBreakdown[]
 }
 
 export interface DailyStatsResponse {
   daily_stats: DailyStat[]
   model_summary: ModelSummary[]
-  provider_summary: ProviderSummary[]
+  provider_summary?: ProviderSummary[] // 仅管理员返回
   period: {
     start_date: string
     end_date: string

frontend/src/components/ui/input.vue

@@ -152,7 +152,7 @@ const autocompleteAttr = computed(() => {
 
 const inputClass = computed(() =>
   cn(
-    'flex h-11 w-full rounded-2xl border border-border/60 bg-card/80 px-4 py-2 text-sm shadow-sm ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/40 focus-visible:border-primary/60 text-foreground backdrop-blur transition-all',
+    'flex h-11 w-full rounded-xl border border-border/60 bg-muted/50 px-4 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/40 focus-visible:border-primary/60 text-foreground transition-all',
     props.masked && 'pr-10',
     props.class
   )

frontend/src/features/auth/components/LoginDialog.vue

@@ -6,13 +6,13 @@
   >
     <div class="px-6 py-6 sm:px-8 sm:py-8">
       <!-- Logo 和标题 -->
-      <div class="flex flex-col items-center text-center mb-6">
+      <div class="flex flex-col items-center text-center mb-8">
         <img
           src="/aether_adaptive.svg"
           alt="Aether"
-          class="h-10 w-10 mb-3"
+          class="h-16 w-16 mb-4"
         >
-        <h2 class="text-xl font-semibold text-foreground">
+        <h2 class="text-2xl font-semibold text-foreground">
           登录到 Aether
         </h2>
       </div>
@@ -187,7 +187,7 @@
         <Button
           type="submit"
           :disabled="authStore.loading"
-          class="w-full h-10"
+          class="w-full h-12"
         >
           {{ authStore.loading ? '登录中...' : '登录' }}
         </Button>
@@ -417,9 +417,9 @@ onMounted(async () => {
   font-size: 0.875rem;
   font-weight: 500;
   color: hsl(var(--foreground));
-  background: hsl(var(--background));
-  border: 1px solid hsl(var(--border));
-  border-radius: 0.5rem;
+  background: hsl(var(--muted) / 0.5);
+  border: 1px solid hsl(var(--border) / 0.6);
+  border-radius: 0.75rem;
   cursor: pointer;
   transition: all 0.15s ease;
 }
@@ -446,8 +446,8 @@ onMounted(async () => {
   justify-content: center;
   width: 3rem;
   height: 3rem;
-  background: hsl(var(--background));
-  border: 1px solid hsl(var(--border));
+  background: hsl(var(--muted) / 0.5);
+  border: 1px solid hsl(var(--border) / 0.6);
   border-radius: 0.75rem;
   cursor: pointer;
   transition: all 0.15s ease;

frontend/src/mocks/handler.ts

@@ -1955,7 +1955,7 @@ registerDynamicRoute('GET', '/api/admin/usage/:requestId', async (_config, param
     messages: [
       {
         role: 'user',
-        content: 'Hello! Can you help me understand how API gateways work?'
+        content: 'Hello! Can you help me understand how AI gateways work?'
       }
     ],
     stream: record.is_stream
@@ -1973,7 +1973,7 @@ registerDynamicRoute('GET', '/api/admin/usage/:requestId', async (_config, param
     content: [
       {
         type: 'text',
-        text: 'API gateways are middleware services that sit between clients and backend services. They handle routing, authentication, rate limiting, and more...'
+        text: 'AI gateways are middleware services that sit between clients and backend services. They handle routing, authentication, rate limiting, and more...'
       }
     ],
     model: record.model,

frontend/src/views/public/Home.vue

@@ -37,7 +37,7 @@
               <h1 class="text-lg font-bold text-[#191919] dark:text-white leading-none">
                 Aether
               </h1>
-              <span class="text-[10px] text-[#91918d] dark:text-muted-foreground leading-none mt-1.5 font-medium tracking-wide">API Gateway</span>
+              <span class="text-[10px] text-[#91918d] dark:text-muted-foreground leading-none mt-1.5 font-medium tracking-wide">AI Gateway</span>
             </div>
           </div>
 

frontend/src/views/shared/Dashboard.vue

@@ -395,8 +395,43 @@
 
     <!-- 趋势图表区域 -->
     <div class="grid grid-cols-1 gap-6 lg:grid-cols-2">
-      <!-- 每日模型成本（堆叠柱状图） -->
-      <Card class="p-5">
+      <!-- 每日使用趋势（折线图）- 普通用户可见 -->
+      <Card
+        v-if="!isAdmin"
+        class="p-5"
+      >
+        <h4 class="mb-3 text-xs font-semibold text-foreground uppercase tracking-wider">
+          每日使用趋势
+        </h4>
+        <div
+          v-if="loadingDaily"
+          class="flex items-center justify-center h-[280px]"
+        >
+          <Skeleton class="h-full w-full" />
+        </div>
+        <div
+          v-else
+          style="height: 280px;"
+        >
+          <LineChart
+            v-if="dailyUsageTrendChartData.labels && dailyUsageTrendChartData.labels.length > 0"
+            :data="dailyUsageTrendChartData"
+            :options="dailyUsageTrendChartOptions"
+          />
+          <div
+            v-else
+            class="flex h-full items-center justify-center text-xs text-muted-foreground"
+          >
+            暂无数据
+          </div>
+        </div>
+      </Card>
+
+      <!-- 每日模型成本（堆叠柱状图）- 仅管理员可见 -->
+      <Card
+        v-if="isAdmin"
+        class="p-5"
+      >
         <h4 class="mb-3 text-xs font-semibold text-foreground uppercase tracking-wider">
           每日模型成本
         </h4>
@@ -424,8 +459,11 @@
         </div>
       </Card>
 
-      <!-- 提供商成本分布（环形图） -->
-      <Card class="p-5">
+      <!-- 提供商成本分布（环形图）- 仅管理员可见 -->
+      <Card
+        v-if="isAdmin"
+        class="p-5"
+      >
         <h4 class="mb-3 text-xs font-semibold text-foreground uppercase tracking-wider">
           提供商成本分布
         </h4>
@@ -452,6 +490,38 @@
           </div>
         </div>
       </Card>
+
+      <!-- 每日模型成本（堆叠柱状图）- 普通用户可见 -->
+      <Card
+        v-if="!isAdmin"
+        class="p-5"
+      >
+        <h4 class="mb-3 text-xs font-semibold text-foreground uppercase tracking-wider">
+          每日模型成本
+        </h4>
+        <div
+          v-if="loadingDaily"
+          class="flex items-center justify-center h-[280px]"
+        >
+          <Skeleton class="h-full w-full" />
+        </div>
+        <div
+          v-else
+          style="height: 280px;"
+        >
+          <BarChart
+            v-if="dailyModelCostChartData.labels && dailyModelCostChartData.labels.length > 0"
+            :data="dailyModelCostChartData"
+            :options="dailyModelCostChartOptions"
+          />
+          <div
+            v-else
+            class="flex h-full items-center justify-center text-xs text-muted-foreground"
+          >
+            暂无数据
+          </div>
+        </div>
+      </Card>
     </div>
 
     <!-- 每日统计 -->
@@ -538,7 +608,10 @@
             <TableHead class="text-center">
               使用模型
             </TableHead>
-            <TableHead class="text-center">
+            <TableHead
+              v-if="isAdmin"
+              class="text-center"
+            >
               使用提供商
             </TableHead>
           </TableRow>
@@ -546,7 +619,7 @@
         <TableBody>
           <TableRow v-if="loadingDaily">
             <TableCell
-              colspan="7"
+              :colspan="isAdmin ? 7 : 6"
               class="text-center py-8"
             >
               <div class="flex items-center justify-center gap-2">
@@ -557,7 +630,7 @@
           </TableRow>
           <TableRow v-else-if="dailyStats.length === 0">
             <TableCell
-              colspan="7"
+              :colspan="isAdmin ? 7 : 6"
               class="text-center py-8 text-muted-foreground text-xs"
             >
               暂无数据
@@ -601,7 +674,10 @@
               <TableCell class="text-center text-xs">
                 {{ stat.unique_models }}
               </TableCell>
-              <TableCell class="text-center text-xs">
+              <TableCell
+                v-if="isAdmin"
+                class="text-center text-xs"
+              >
                 {{ stat.unique_providers }}
               </TableCell>
             </TableRow>
@@ -724,6 +800,7 @@ import {
 } from '@/components/ui'
 import BarChart from '@/components/charts/BarChart.vue'
 import DoughnutChart from '@/components/charts/DoughnutChart.vue'
+import LineChart from '@/components/charts/LineChart.vue'
 import {
   Users,
   Activity,
@@ -1097,6 +1174,91 @@ const providerCostChartOptions = computed<ChartOptions<'doughnut'>>(() => ({
   }
 }))
 
+// 每日使用趋势（折线图）- 普通用户
+const dailyUsageTrendChartData = computed<ChartData<'line'>>(() => {
+  // 管理员不需要此图表，直接返回空数据
+  if (isAdmin.value || dailyStats.value.length === 0) {
+    return { labels: [], datasets: [] }
+  }
+
+  return {
+    labels: dailyStats.value.map(stat => formatDateForChart(stat.date)),
+    datasets: [
+      {
+        label: '请求数',
+        data: dailyStats.value.map(stat => stat.requests),
+        borderColor: 'rgba(59, 130, 246, 0.8)',
+        backgroundColor: 'rgba(59, 130, 246, 0.1)',
+        fill: true,
+        tension: 0.3,
+        yAxisID: 'y'
+      },
+      {
+        label: 'Tokens (K)',
+        data: dailyStats.value.map(stat => stat.tokens / 1000),
+        borderColor: 'rgba(16, 185, 129, 0.8)',
+        backgroundColor: 'rgba(16, 185, 129, 0.1)',
+        fill: true,
+        tension: 0.3,
+        yAxisID: 'y1'
+      }
+    ]
+  }
+})
+
+const dailyUsageTrendChartOptions = computed<ChartOptions<'line'>>(() => {
+  // 管理员不需要此图表
+  if (isAdmin.value) {
+    return {} as ChartOptions<'line'>
+  }
+  return {
+    responsive: true,
+    maintainAspectRatio: false,
+    interaction: {
+      mode: 'index',
+      intersect: false
+    },
+    scales: {
+      x: {
+        ticks: { font: { size: 10 } }
+      },
+      y: {
+        type: 'linear',
+        display: true,
+        position: 'left',
+        title: { display: true, text: '请求数', color: 'rgb(107, 114, 128)', font: { size: 10 } },
+        ticks: { font: { size: 10 } }
+      },
+      y1: {
+        type: 'linear',
+        display: true,
+        position: 'right',
+        title: { display: true, text: 'Tokens (K)', color: 'rgb(107, 114, 128)', font: { size: 10 } },
+        ticks: { font: { size: 10 } },
+        grid: { drawOnChartArea: false }
+      }
+    },
+    plugins: {
+      legend: {
+        display: true,
+        position: 'bottom',
+        labels: { font: { size: 10 }, boxWidth: 12, padding: 8 }
+      },
+      tooltip: {
+        callbacks: {
+          label: (context) => {
+            const value = context.raw as number
+            if (context.dataset.label === 'Tokens (K)') {
+              return `${context.dataset.label}: ${value.toFixed(1)}K`
+            }
+            return `${context.dataset.label}: ${value}`
+          }
+        }
+      }
+    }
+  }
+})
+
 onMounted(async () => {
   checkScreenSize()
   setupResizeObserver()