refactor: 重构移动端页面布局与资源路径，优化打包配置

1. 新增layout.uts统一管理页面尺寸与安全区计算
2. 修正图片资源路径到static/mobile目录
3. 调整App.vue与AppIcon组件样式适配多端
4. 为微信小程序配置打包忽略规则减少包体积
5. 修复API请求错误抛出类型，完善类型定义
6. 补充README文档说明项目运行与维护规范
7. 优化多个页面的样式与生命周期逻辑

pages/index/index.uvue

@@ -1,26 +1,37 @@
 <template>
-	<view class="splash page-white" @click="enter">
-		<view class="splash-status"></view>
+	<view class="splash page-white" @click="enter" :style="pageStyle()">
+		<view class="splash-status" :style="statusStyle(0)"></view>
 		<view class="brand-area">
 			<BrandLogo />
 			<text class="tagline">智能评估 · 精准匹配</text>
 			<text class="slogan">让融资更简单</text>
 		</view>
-		<image class="splash-art" src="/static/images/shield.png" mode="aspectFit"></image>
+		<image class="splash-art" src="/static/mobile/images/shield.png" mode="aspectFit"></image>
 		<view class="launch-line"><view class="launch-dot"></view><text>开启智能融资新体验</text></view>
 	</view>
 </template>
 
 <script setup lang="uts">
+	import { usePageLayout } from '@/services/layout.uts'
+	const { statusStyle, pageStyle } = usePageLayout()
 	import BrandLogo from '@/components/BrandLogo.uvue'
 	import { isLoggedIn } from '@/services/api.uts'
-	const enter = () => { uni.redirectTo({ url: isLoggedIn() ? '/pages/home/home' : '/pages/login/login' }) }
-	setTimeout(() => enter(), 1800)
+	let enterTimer = 0
+	let entered = false
+	const enter = () => {
+		if (entered) return
+		entered = true
+		clearTimeout(enterTimer)
+		uni.redirectTo({ url: isLoggedIn() ? '/pages/home/home' : '/pages/login/login' })
+	}
+	onShow(() => { if (!entered) enterTimer = setTimeout(() => enter(), 1800) })
+	onHide(() => { clearTimeout(enterTimer) })
+	onUnmounted(() => { clearTimeout(enterTimer) })
 </script>
 
 <style>
-	.splash { min-height: 100vh; align-items: center; position: relative; overflow: hidden; }
-	.splash-status { height: var(--status-bar-height); }
+	.splash {  align-items: center; position: relative; overflow: hidden; }
+	.splash-status {  }
 	.brand-area { align-items: center; margin-top: 220rpx; }
 	.tagline { margin-top: 18rpx; color: #32405a; font-size: 28rpx; font-weight: 600; }
 	.slogan { margin-top: 42rpx; color: #102557; font-size: 33rpx; font-weight: 800; }