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/pages/detail/detail.js

@@ -0,0 +1,67 @@
+const app = getApp();
+const svc = require('../../services/exercise');
+
+Page({
+  data: {
+    statusBarHeight: 20,
+    id: '',
+    exercise: null,
+    related: [],
+    loading: true
+  },
+
+  onLoad(query) {
+    const id = query.id || '';
+    this.setData({ statusBarHeight: app.globalData.statusBarHeight || 20, id });
+    this.load();
+  },
+
+  load() {
+    this.setData({ loading: true });
+    svc.getExercise(this.data.id).then((ex) => {
+      this.setData({ exercise: ex, loading: false });
+      if (ex && ex.target) {
+        svc.listExercises({ target: ex.target, pageSize: 6 }).then((res) => {
+          const related = ((res && res.items) || [])
+            .filter(i => i.id !== ex.id)
+            .slice(0, 6);
+          this.setData({ related });
+        }).catch(() => {});
+      }
+    }).catch(() => {
+      this.setData({ loading: false });
+    });
+  },
+
+  onAdd() {
+    wx.showToast({ title: '已加入今日训练', icon: 'success' });
+  },
+
+  onBack() {
+    const pages = getCurrentPages();
+    if (pages.length > 1) {
+      wx.navigateBack();
+    } else {
+      wx.reLaunch({ url: '/pages/index/index' });
+    }
+  },
+
+  onExercise(e) {
+    wx.navigateTo({ url: '/pages/detail/detail?id=' + encodeURIComponent(e.detail.id) });
+  },
+
+  onShareAppMessage() {
+    const ex = this.data.exercise || {};
+    return {
+      title: ex.name ? ('FITCOACH · ' + ex.name) : 'FITCOACH 智能健身教练',
+      path: '/pages/detail/detail?id=' + this.data.id
+    };
+  },
+
+  onShareTimeline() {
+    return {
+      title: 'FITCOACH · 精准训练推荐',
+      query: 'id=' + this.data.id
+    };
+  }
+});