feat(dashboard): add dashboard page with stats and splash screen

src/components/common/SplashScreen.scss

@@ -0,0 +1,106 @@
+@use 'sass:color';
+@use '../../styles/variables.scss' as *;
+
+.splash-screen {
+  position: fixed;
+  inset: 0;
+  z-index: 9999;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--bg-primary);
+  opacity: 1;
+  transition: opacity 0.4s ease-out;
+
+  &.fade-out {
+    opacity: 0;
+    pointer-events: none;
+  }
+}
+
+.splash-content {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: $spacing-md;
+  animation: splash-enter 0.6s ease-out;
+}
+
+@keyframes splash-enter {
+  from {
+    opacity: 0;
+    transform: scale(0.9) translateY(20px);
+  }
+  to {
+    opacity: 1;
+    transform: scale(1) translateY(0);
+  }
+}
+
+.splash-logo {
+  width: 80px;
+  height: 80px;
+  border-radius: $radius-lg;
+  box-shadow: $shadow-lg;
+  animation: splash-logo-pulse 1.5s ease-in-out infinite;
+}
+
+@keyframes splash-logo-pulse {
+  0%, 100% {
+    transform: scale(1);
+  }
+  50% {
+    transform: scale(1.05);
+  }
+}
+
+.splash-title {
+  font-size: 28px;
+  font-weight: 800;
+  color: var(--text-primary);
+  margin: 0;
+  letter-spacing: -0.5px;
+}
+
+.splash-subtitle {
+  font-size: 16px;
+  font-weight: 500;
+  color: var(--text-secondary);
+  margin: 0;
+  margin-top: -8px;
+}
+
+.splash-loader {
+  width: 120px;
+  height: 3px;
+  background: var(--border-color);
+  border-radius: $radius-full;
+  overflow: hidden;
+  margin-top: $spacing-md;
+}
+
+.splash-loader-bar {
+  width: 100%;
+  height: 100%;
+  background: var(--primary-color);
+  border-radius: $radius-full;
+  animation: splash-loading 1.2s ease-in-out infinite;
+  transform-origin: left;
+}
+
+@keyframes splash-loading {
+  0% {
+    transform: scaleX(0);
+  }
+  50% {
+    transform: scaleX(1);
+    transform-origin: left;
+  }
+  50.01% {
+    transform-origin: right;
+  }
+  100% {
+    transform: scaleX(0);
+    transform-origin: right;
+  }
+}

src/components/common/SplashScreen.tsx

@@ -0,0 +1,40 @@
+import { useEffect, useState } from 'react';
+import { INLINE_LOGO_JPEG } from '@/assets/logoInline';
+import './SplashScreen.scss';
+
+interface SplashScreenProps {
+  onFinish: () => void;
+  duration?: number;
+}
+
+export function SplashScreen({ onFinish, duration = 1500 }: SplashScreenProps) {
+  const [fadeOut, setFadeOut] = useState(false);
+
+  useEffect(() => {
+    const fadeTimer = setTimeout(() => {
+      setFadeOut(true);
+    }, duration - 400);
+
+    const finishTimer = setTimeout(() => {
+      onFinish();
+    }, duration);
+
+    return () => {
+      clearTimeout(fadeTimer);
+      clearTimeout(finishTimer);
+    };
+  }, [duration, onFinish]);
+
+  return (
+    <div className={`splash-screen ${fadeOut ? 'fade-out' : ''}`}>
+      <div className="splash-content">
+        <img src={INLINE_LOGO_JPEG} alt="CPAMC" className="splash-logo" />
+        <h1 className="splash-title">CLI Proxy API</h1>
+        <p className="splash-subtitle">Management Center</p>
+        <div className="splash-loader">
+          <div className="splash-loader-bar" />
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/layout/MainLayout.tsx

@@ -8,6 +8,7 @@ import {
   IconFileText,
   IconInfo,
   IconKey,
+  IconLayoutDashboard,
   IconScrollText,
   IconSettings,
   IconShield,
@@ -18,6 +19,7 @@ import { useAuthStore, useConfigStore, useLanguageStore, useNotificationStore, u
 import { versionApi } from '@/services/api';
 
 const sidebarIcons: Record<string, ReactNode> = {
+  dashboard: <IconLayoutDashboard size={18} />,
   settings: <IconSlidersHorizontal size={18} />,
   apiKeys: <IconKey size={18} />,
   aiProviders: <IconBot size={18} />,
@@ -230,6 +232,7 @@ export function MainLayout() {
           : 'muted';
 
   const navItems = [
+    { path: '/', label: t('nav.dashboard'), icon: sidebarIcons.dashboard },
     { path: '/settings', label: t('nav.basic_settings'), icon: sidebarIcons.settings },
     { path: '/api-keys', label: t('nav.api_keys'), icon: sidebarIcons.apiKeys },
     { path: '/ai-providers', label: t('nav.ai_providers'), icon: sidebarIcons.aiProviders },

src/components/ui/icons.tsx

@@ -303,3 +303,14 @@ export function IconCode({ size = 20, ...props }: IconProps) {
     </svg>
   );
 }
+
+export function IconLayoutDashboard({ size = 20, ...props }: IconProps) {
+  return (
+    <svg {...baseSvgProps} width={size} height={size} {...props}>
+      <rect width="7" height="9" x="3" y="3" rx="1" />
+      <rect width="7" height="5" x="14" y="3" rx="1" />
+      <rect width="7" height="9" x="14" y="12" rx="1" />
+      <rect width="7" height="5" x="3" y="16" rx="1" />
+    </svg>
+  );
+}