feat: init fitness-coach (backend + miniprogram)

- backend: NestJS service with exercise/plan data
- miniprogram: WeChat mini program client
- exclude node_modules, dist, runtime data-store, local env

miniprogram/components/navbar/index.js

@@ -0,0 +1,27 @@
+const app = getApp();
+
+Component({
+  properties: {
+    title: { type: String, value: '' },
+    showBack: { type: Boolean, value: false }
+  },
+  data: {
+    statusBarHeight: 20
+  },
+  lifetimes: {
+    attached() {
+      const h = (app.globalData && app.globalData.statusBarHeight) || 20;
+      this.setData({ statusBarHeight: h });
+    }
+  },
+  methods: {
+    onBack() {
+      const pages = getCurrentPages();
+      if (pages.length > 1) {
+        wx.navigateBack();
+      } else {
+        wx.reLaunch({ url: '/pages/index/index' });
+      }
+    }
+  }
+});

miniprogram/components/navbar/index.json

@@ -0,0 +1,4 @@
+{
+  "component": true,
+  "usingComponents": {}
+}

miniprogram/components/navbar/index.wxml

@@ -0,0 +1,7 @@
+<view class="navbar">
+  <view class="navbar__status" style="height: {{statusBarHeight}}px;"></view>
+  <view class="navbar__bar">
+    <view wx:if="{{showBack}}" class="navbar__back" bindtap="onBack">‹</view>
+    <view wx:if="{{title}}" class="navbar__title">{{title}}</view>
+  </view>
+</view>

miniprogram/components/navbar/index.wxss

@@ -0,0 +1,29 @@
+.navbar {
+  background: linear-gradient(180deg, rgba(22,32,27,0.96) 0%, rgba(14,17,16,0.55) 100%);
+  position: sticky;
+  top: 0;
+  z-index: 50;
+}
+.navbar__status { width: 100%; }
+.navbar__bar {
+  height: 88rpx;
+  display: flex;
+  align-items: center;
+  position: relative;
+  padding: 0 28rpx;
+}
+.navbar__back {
+  font-size: 56rpx;
+  color: var(--gold);
+  line-height: 1;
+  width: 60rpx;
+}
+.navbar__title {
+  position: absolute;
+  left: 0; right: 0;
+  text-align: center;
+  font-size: 34rpx;
+  font-weight: 700;
+  letter-spacing: 2rpx;
+  color: var(--text);
+}