v6.7.1: UX增强 — 南印/北印切换 + 快速/深度解读模式

## UX改进
- 本命盘页: 南印/北印风格切换按钮
- 解读模式: 快速模式(入门)/深度模式(专业)切换
- 为新手降低门槛，为专业用户保留深度

jyotish-app/index.html

@@ -143,6 +143,17 @@
 
         <!-- === Tab: 本命盘 === -->
         <div class="tab-panel active" id="tab-chart">
+          <div style="display:flex;justify-content:space-between;align-items:center;margin-bottom:10px">
+            <div class="chart-style-toggle">
+              <button class="chart-btn active" id="btn-south-style" title="南印度风格">南印</button>
+              <button class="chart-btn" id="btn-north-style" title="北印度风格">北印</button>
+            </div>
+            <div class="reading-mode-toggle">
+              <span style="font-size:12px;color:#999;margin-right:8px">解读:</span>
+              <button class="chart-btn active" id="btn-quick-mode">快速</button>
+              <button class="chart-btn" id="btn-deep-mode">深度</button>
+            </div>
+          </div>
           <div class="chart-layout">
             <div class="chart-container reveal" style="position:relative;">
               <div class="chart-header">