feat: 完成项目基础功能搭建与样式优化

1.  新增评估选择组件、本地草稿存储与新闻/金融内容服务
2.  重构页面布局与样式：调整按钮阴影、图标尺寸、导航栏样式
3.  更新启动页、报告页、消息中心等页面UI与交互逻辑
4.  替换图标资源，调整禁用态透明度
5.  补充README文档与本地数据模拟实现

components/AppHeader.uvue

@@ -2,7 +2,7 @@
 	<view class="header-wrap">
 		<view class="status-bar" :style="statusStyle(0)"></view>
 		<view class="app-header">
-			<view class="header-side" @click="handleBack"><AppIcon v-if="back" name="chevron-right" :size="34" class="back-icon" /></view>
+			<view class="header-side" @click="handleBack"><AppIcon v-if="back" name="chevron-right" :size="48" class="back-icon" /></view>
 			<text class="header-title">{{ title }}</text>
 			<view class="header-side header-right"><slot></slot></view>
 		</view>
@@ -13,9 +13,11 @@
 	import { usePageLayout } from '@/services/layout.uts'
 	const { statusStyle } = usePageLayout()
 	import AppIcon from '@/components/AppIcon.uvue'
-	const props = defineProps({ title: { type: String, default: '' }, back: { type: Boolean, default: true } })
+	const props = defineProps({ title: { type: String, default: '' }, back: { type: Boolean, default: true }, customBack: { type: Boolean, default: false } })
+	const emit = defineEmits(['back'])
 	const handleBack = () => {
 		if (!props.back) return
+		if (props.customBack) { emit('back'); return }
 		const pages = getCurrentPages()
 		if (pages.length > 1) uni.navigateBack({ delta: 1 })
 		else uni.reLaunch({ url: '/pages/home/home' })
@@ -26,7 +28,7 @@
 	.header-wrap { background-color: #ffffff; }
 	.status-bar {  }
 	.app-header { height: 96rpx; padding: 0 24rpx; flex-direction: row; align-items: center; justify-content: space-between; border-bottom: 1rpx solid #edf1f7; }
-	.header-side { width: 100rpx; height: 96rpx; align-items: flex-start; justify-content: center; }
+	.header-side { width: 88rpx; height: 96rpx; align-items: flex-start; justify-content: center; flex-shrink: 0; }
 	.header-right { align-items: flex-end; }
 	.back-icon { transform: rotate(180deg); margin-top: 0; }
 	.header-title { font-size: 34rpx; font-weight: 700; color: #111d35; }