feat: 小程序连接服务器IP + 同步未提交开发

- miniprogram/config.js: BASE_URL 指向 http://192.227.237.8:3001
- 动作标题中文化(nameZh)，搜索匹配 name/nameZh/nameEn
- 新增计划/收藏/我的 等页面与组件
- 后端 Docker 化(Dockerfile/.dockerignore)与翻译脚本
- .gitignore 补充 .DS_Store

miniprogram/components/level-tag/index.js

@@ -0,0 +1,29 @@
+// 难度等级标签：beginner / intermediate / advanced / all
+const MAP = {
+  beginner: { text: '新手入门', color: '#3FBF7F', bg: 'rgba(63,191,127,0.14)' },
+  intermediate: { text: '进阶提升', color: '#5B9DF9', bg: 'rgba(91,157,249,0.14)' },
+  advanced: { text: '高级挑战', color: '#F08A5D', bg: 'rgba(240,138,93,0.14)' },
+  all: { text: '全阶段', color: '#58C9B9', bg: 'rgba(88,201,185,0.14)' }
+};
+
+Component({
+  properties: {
+    level: { type: String, value: 'all' },
+    label: { type: String, value: '' }
+  },
+  data: {
+    text: '全阶段',
+    color: '#58C9B9',
+    bg: 'rgba(88,201,185,0.14)'
+  },
+  observers: {
+    'level, label': function (level, label) {
+      const m = MAP[level] || MAP.all;
+      this.setData({
+        text: label || m.text,
+        color: m.color,
+        bg: m.bg
+      });
+    }
+  }
+});

miniprogram/components/level-tag/index.json

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

miniprogram/components/level-tag/index.wxml

@@ -0,0 +1 @@
+<view class="lvl" style="color: {{color}}; background: {{bg}};">{{text}}</view>

miniprogram/components/level-tag/index.wxss

@@ -0,0 +1,9 @@
+.lvl {
+  display: inline-flex;
+  align-items: center;
+  font-size: 20rpx;
+  font-weight: 600;
+  padding: 6rpx 16rpx;
+  border-radius: 999rpx;
+  line-height: 1;
+}