feat: 统一全局界面风格为浅色绿色主题

将个人中心、引导页从深色主题改为浅绿渐变主题，与首页、统计、AI助手、记录页保持一致的视觉风格。更新 App.vue 全局样式和 pages.json 导航栏配色。

Made-with: Cursor

App.vue

@@ -48,8 +48,8 @@ export default {
 
 <style>
 page {
-	background-color: #0D1F17;
-	color: #FFFFFF;
+	background: linear-gradient(to bottom, #D1FAE5 0%, #F0FDF4 45%, #FFFFFF 100%);
+	color: #111827;
 	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
 	font-size: 28rpx;
 	line-height: 1.5;
@@ -62,26 +62,28 @@ page {
 }
 
 .card {
-	background-color: #1A3325;
+	background-color: #FFFFFF;
 	border-radius: 24rpx;
 	padding: 32rpx;
 	margin-bottom: 24rpx;
+	border: 2rpx solid #ECFDF3;
+	box-shadow: 0 8rpx 20rpx rgba(16, 185, 129, 0.08);
 }
 
 .card-light {
-	background-color: #243D2E;
+	background-color: #F0FDF4;
 }
 
 .text-primary {
-	color: #4ADE80;
+	color: #10B981;
 }
 
 .text-secondary {
-	color: #9CA3AF;
+	color: #6B7280;
 }
 
 .text-muted {
-	color: #6B7280;
+	color: #9CA3AF;
 }
 
 .text-center {
@@ -164,20 +166,20 @@ page {
 }
 
 .btn-primary {
-	background-color: #4ADE80;
-	color: #0D1F17;
+	background-color: #10B981;
+	color: #FFFFFF;
 }
 
 .btn-secondary {
-	background-color: #1A3325;
-	color: #FFFFFF;
-	border: 2rpx solid #374151;
+	background-color: #FFFFFF;
+	color: #111827;
+	border: 2rpx solid #E5E7EB;
 }
 
 .btn-outline {
 	background-color: transparent;
-	color: #4ADE80;
-	border: 2rpx solid #4ADE80;
+	color: #10B981;
+	border: 2rpx solid #10B981;
 }
 
 .safe-area-bottom {