feat(bazi): 八字页重构——空态示例排盘+字段术语表+文化声明，生辰档案绑定

- 八字页：未绑定生辰时展示虚构示例排盘(1990-08-08 10:30男)与15条字段说明，
  附传统文化声明文案；已绑定时支持多档案切换，排盘增强(十神/藏干/纳音/五行配色/命盘概览)
- 个人中心：新增生辰管理卡片，每用户免费绑定3个出生年月；登录改为真实微信登录
- 服务端：新增 BirthProfile 模型与 /api/user/birth-profiles 增删查接口，AutoMigrate 建表
- 前端：新增 birth-profile.js 本地存储优先+登录后云端双向同步
- 修复：个人中心 tabBar 页面入口误用 navigateTo 改为 switchTab

mini/pages/bazi/bazi.wxss

@@ -9,35 +9,103 @@
   color: #C41E3A;
 }
 
-.form-item {
-  margin-bottom: 24rpx;
+/* 文化声明卡片 */
+.culture-card {
+  background: linear-gradient(135deg, #C41E3A 0%, #8B1A2B 100%);
+  border-radius: 24rpx;
+  padding: 28rpx 24rpx;
+  margin-bottom: 16rpx;
 }
 
-.form-label {
+.culture-title {
+  color: #FFFFFF;
+  font-size: 32rpx;
+  font-weight: 700;
+  margin-bottom: 12rpx;
+}
+
+.culture-text {
+  color: rgba(255, 255, 255, 0.92);
+  font-size: 24rpx;
+  line-height: 1.7;
+}
+
+/* 空态卡片 */
+.empty-card {
+  text-align: center;
+}
+
+.empty-title {
+  font-size: 32rpx;
+  font-weight: 600;
+  color: #1A1A1A;
+  margin-bottom: 12rpx;
+}
+
+.empty-desc {
   font-size: 24rpx;
   color: #6B5E53;
-  margin-bottom: 8rpx;
-  display: block;
+  line-height: 1.7;
 }
 
-.picker-input {
-  padding: 20rpx;
-  background: #FFFBF5;
-  border-radius: 12rpx;
-  border: 1rpx solid #E8D5C4;
+/* 示例横幅 */
+.demo-banner {
+  display: flex;
+  align-items: center;
+  gap: 12rpx;
+  background: #FFF7E6;
+  border: 1rpx solid #F0D9A8;
+  border-radius: 16rpx;
+  padding: 16rpx 20rpx;
+  margin-bottom: 16rpx;
 }
 
-.btn-outline.active {
-  background: #C41E3A;
+.demo-tag {
+  flex-shrink: 0;
+  background: #D99A06;
   color: #FFFFFF;
-  border-color: #C41E3A;
+  font-size: 20rpx;
+  border-radius: 8rpx;
+  padding: 2rpx 12rpx;
 }
 
+.demo-text {
+  font-size: 22rpx;
+  color: #8A6D1A;
+  line-height: 1.5;
+}
+
+/* 档案选择 */
+.profile-chips {
+  flex-wrap: wrap;
+}
+
+.profile-chip {
+  padding: 10rpx 28rpx;
+  border-radius: 999rpx;
+  border: 2rpx solid #E8D5C4;
+  font-size: 26rpx;
+  color: #6B5E53;
+  background: #FFFFFF;
+}
+
+.profile-chip.active {
+  background: #C41E3A;
+  border-color: #C41E3A;
+  color: #FFFFFF;
+}
+
+.add-chip {
+  border-style: dashed;
+  color: #9E8E7E;
+}
+
+/* 四柱 */
 .pillar {
   display: flex;
   flex-direction: column;
   align-items: center;
-  padding: 20rpx;
+  padding: 16rpx 8rpx;
   background: #FFFBF5;
   border-radius: 12rpx;
 }
@@ -47,18 +115,69 @@
   color: #9E8E7E;
 }
 
-.pillar-ganzhi {
-  font-size: 36rpx;
-  font-weight: 700;
-  color: #C41E3A;
-  margin: 8rpx 0;
-}
-
 .pillar-ten {
   font-size: 20rpx;
   color: #6B5E53;
+  margin: 4rpx 0;
 }
 
+.pillar-char {
+  font-size: 44rpx;
+  font-weight: 700;
+  line-height: 1.2;
+  color: #1A1A1A;
+}
+
+.pillar-hide {
+  font-size: 18rpx;
+  color: #9E8E7E;
+  margin-top: 8rpx;
+  text-align: center;
+  word-break: break-all;
+}
+
+.pillar-nayin {
+  font-size: 18rpx;
+  color: #C41E3A;
+  margin-top: 4rpx;
+}
+
+/* 五行配色 */
+.el-wood { color: #2E7D32; }
+.el-fire { color: #C41E3A; }
+.el-earth { color: #8D6E63; }
+.el-metal { color: #B8860B; }
+.el-water { color: #1565C0; }
+
+/* 命盘概览 */
+.meta-grid {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 16rpx;
+}
+
+.meta-item {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  background: #FFFBF5;
+  border-radius: 12rpx;
+  padding: 16rpx 8rpx;
+}
+
+.meta-label {
+  font-size: 20rpx;
+  color: #9E8E7E;
+}
+
+.meta-value {
+  font-size: 28rpx;
+  font-weight: 600;
+  color: #1A1A1A;
+  margin-top: 4rpx;
+}
+
+/* 五行分析 */
 .element-bar {
   display: flex;
   flex-direction: column;
@@ -79,23 +198,29 @@
 .element-track {
   flex: 1;
   height: 16rpx;
-  background: #E8D5C4;
+  background: #F0E6DA;
   border-radius: 8rpx;
   overflow: hidden;
 }
 
 .element-fill {
   height: 100%;
-  background: #C41E3A;
   border-radius: 8rpx;
 }
 
+.element-fill.el-wood { background: #2E7D32; }
+.element-fill.el-fire { background: #C41E3A; }
+.element-fill.el-earth { background: #8D6E63; }
+.element-fill.el-metal { background: #B8860B; }
+.element-fill.el-water { background: #1565C0; }
+
 .element-count {
   width: 60rpx;
   text-align: right;
   font-size: 24rpx;
 }
 
+/* 大运/流年 */
 .fortune-item {
   display: flex;
   flex-direction: column;
@@ -105,3 +230,55 @@
   border-radius: 12rpx;
   min-width: 160rpx;
 }
+
+/* 字段说明 */
+.glossary-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.glossary-title {
+  margin-bottom: 0;
+}
+
+.glossary-toggle {
+  font-size: 24rpx;
+  color: #9E8E7E;
+}
+
+.glossary-item {
+  padding: 16rpx 0;
+  border-bottom: 1rpx solid #F0E6DA;
+}
+
+.glossary-item:last-child {
+  border-bottom: none;
+}
+
+.glossary-term {
+  display: block;
+  font-size: 26rpx;
+  font-weight: 600;
+  color: #C41E3A;
+  margin-bottom: 6rpx;
+}
+
+.glossary-desc {
+  display: block;
+  font-size: 24rpx;
+  color: #6B5E53;
+  line-height: 1.7;
+}
+
+/* 底部 */
+.bottom-actions {
+  margin-bottom: 16rpx;
+}
+
+.disclaimer {
+  text-align: center;
+  font-size: 20rpx;
+  color: #9E8E7E;
+  padding: 8rpx 0 24rpx;
+}