style: 按毛玻璃设计稿重做广场/附近/发布/汪友/我的五大页面视觉

参照 wangquan_glass_redesign_mockup.html 的玻璃拟态(glassmorphism)设计语言重写前端展示样式：
- app.wxss: 引入 coral/tangerine/lemon/mint/sky/lilac 色板与 .glass/.glass-strong/.sticker-tag 毛玻璃工具类，背景改为纯白
- custom-tab-bar: 改为悬浮玻璃浮岛(.tab-dock)，含液态光泽动画与渐变发布按钮(FAB)
- feed: 故事条改为方形圆角描边+conic渐变，顶部操作按钮、骨架屏改为玻璃质感
- post-card 组件: 卡片/贴纸标签/操作按钮全面玻璃化，点赞按钮改为渐变高亮
- nearby: 地图控件、宠物弹窗、列表项、预览条统一为毛玻璃卡片
- post: 上传区/输入框/标签pill/心情选择器改为玻璃质感+渐变选中态
- friends: 空态与好友列表项改为玻璃卡片
- profile: 用户信息区改为带渐变光斑的玻璃英雄卡，统计/宠物卡/动态网格同步玻璃化

未改动页面结构(WXML)与业务逻辑(TS)，仅升级视觉样式(WXSS)，保持程序可运行。

miniprogram/components/post-card/post-card.wxss

@@ -1,10 +1,12 @@
 .post-card {
   margin: 0 28rpx 32rpx;
-  background: rgba(255, 255, 255, 0.88);
-  border-radius: 48rpx;
-  border: 1rpx solid rgba(255, 255, 255, 0.72);
+  background: rgba(255, 255, 255, 0.40);
+  backdrop-filter: blur(28rpx) saturate(170%);
+  -webkit-backdrop-filter: blur(28rpx) saturate(170%);
+  border-radius: 56rpx;
+  border: 1rpx solid rgba(255, 255, 255, 0.78);
   overflow: hidden;
-  box-shadow: 0 18rpx 40rpx rgba(95, 49, 104, 0.12);
+  box-shadow: 0 22rpx 48rpx rgba(120, 70, 140, 0.16), inset 0 1rpx 0 rgba(255, 255, 255, 0.65);
 }
 
 /* 头部 */
@@ -16,17 +18,18 @@
 }
 
 .post-avatar {
-  width: 76rpx;
-  height: 76rpx;
-  border-radius: 28rpx;
+  width: 80rpx;
+  height: 80rpx;
+  border-radius: 30rpx;
   display: flex;
   align-items: center;
   justify-content: center;
   font-size: 32rpx;
   font-weight: 800;
-  color: rgba(39, 34, 53, 0.72);
+  color: rgba(43, 36, 56, 0.72);
   flex-shrink: 0;
-  box-shadow: inset 0 0 0 2rpx rgba(255, 255, 255, 0.8);
+  border: 3rpx solid rgba(255, 255, 255, 0.85);
+  box-shadow: 0 10rpx 22rpx rgba(120, 70, 150, 0.16);
 }
 
 .post-meta {
@@ -38,7 +41,7 @@
   display: block;
   font-size: 28rpx;
   font-weight: 800;
-  color: #272235;
+  color: #2b2438;
 }
 
 .post-loc {
@@ -52,7 +55,7 @@
 
 .loc-text {
   font-size: 22rpx;
-  color: #9b8fa8;
+  color: #a59cb5;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
@@ -60,7 +63,7 @@
 
 .post-time {
   font-size: 22rpx;
-  color: #9b8fa8;
+  color: #a59cb5;
   flex-shrink: 0;
 }
 
@@ -78,14 +81,19 @@
 
 .post-tag-chip {
   position: absolute;
-  top: 20rpx;
-  left: 20rpx;
-  background: rgba(39, 34, 53, 0.88);
-  color: #fff;
-  font-size: 20rpx;
+  top: 22rpx;
+  left: 22rpx;
+  background: rgba(255, 255, 255, 0.55);
+  backdrop-filter: blur(20rpx) saturate(180%);
+  -webkit-backdrop-filter: blur(20rpx) saturate(180%);
+  color: #2b2438;
+  font-size: 21rpx;
   font-weight: 800;
-  padding: 8rpx 18rpx;
-  border-radius: 999rpx;
+  padding: 10rpx 22rpx;
+  border-radius: 24rpx;
+  border: 1rpx solid rgba(255, 255, 255, 0.7);
+  box-shadow: 0 14rpx 30rpx rgba(120, 70, 150, 0.18);
+  transform: rotate(-3deg);
 }
 
 .post-img-grid {
@@ -127,7 +135,7 @@
 .post-caption {
   display: block;
   font-size: 28rpx;
-  color: #272235;
+  color: #2b2438;
   line-height: 1.6;
   margin-bottom: 16rpx;
 }
@@ -144,8 +152,9 @@
   align-items: center;
   font-size: 22rpx;
   font-weight: 800;
-  color: #8b3cff;
-  background: #f0e8ff;
+  color: #8a3fe0;
+  background: rgba(167, 139, 250, 0.16);
+  border: 1rpx solid rgba(167, 139, 250, 0.28);
   border-radius: 999rpx;
   padding: 6rpx 14rpx;
 }
@@ -153,9 +162,9 @@
 /* 操作栏 */
 .post-actions {
   display: flex;
-  gap: 16rpx;
-  padding-top: 18rpx;
-  border-top: 1rpx solid rgba(43, 37, 61, 0.07);
+  gap: 14rpx;
+  padding-top: 20rpx;
+  border-top: 1rpx solid rgba(255, 255, 255, 0.55);
 }
 
 .action-btn {
@@ -164,15 +173,23 @@
   gap: 8rpx;
   font-size: 24rpx;
   font-weight: 800;
-  color: #6a6178;
-  background: #f7f3ff;
+  color: #6e6480;
+  background: rgba(255, 255, 255, 0.42);
+  border: 1rpx solid rgba(255, 255, 255, 0.62);
   border-radius: 999rpx;
-  padding: 10rpx 18rpx;
+  padding: 12rpx 22rpx;
+  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
+}
+
+.action-btn:active {
+  transform: scale(0.95);
 }
 
 .action-btn.liked {
-  color: #ff4f91;
-  background: #ffe5f0;
+  color: #fff;
+  background: linear-gradient(135deg, #ff2d6e, #ff7a1a);
+  border-color: transparent;
+  box-shadow: 0 12rpx 26rpx rgba(255, 45, 110, 0.32);
 }
 
 .action-icon {