v2.2.1: frontend closed-source + Docker one-click deploy

- Remove frontend source code (now in private repo)
- Add pre-built frontend/dist/ with Nginx serving
- Simplify docker-compose.yml (no Node.js build needed)
- Update README with docs index and Docker deploy guide
- Add admin order list and AI analysis stats tabs
- Add quick trade API routes
- Clean up redundant files (package-lock.json, yarn.lock, .iml)
- Add GitHub Actions workflow for frontend update automation

quantdinger_vue/src/components/TextArea/index.jsx

@@ -1,67 +0,0 @@
-import './style.less'
-import { getStrFullLength, cutStrByFullLength } from '../_util/util'
-import Input from 'ant-design-vue/es/input'
-const TextArea = Input.TextArea
-
-export default {
-  name: 'LimitTextArea',
-  model: {
-    prop: 'value',
-    event: 'change'
-  },
-  props: Object.assign({}, TextArea.props, {
-    prefixCls: {
-      type: String,
-      default: 'ant-textarea-limit'
-    },
-    // eslint-disable-next-line
-    value: {
-      type: String
-    },
-    limit: {
-      type: Number,
-      default: 200
-    }
-  }),
-  data () {
-    return {
-      currentLimit: 0
-    }
-  },
-  watch: {
-    value (val) {
-      this.calcLimitNum(val)
-    }
-  },
-  created () {
-    this.calcLimitNum(this.value)
-  },
-  methods: {
-    handleChange (e) {
-      const value = e.target.value
-      const len = getStrFullLength(value)
-      if (len <= this.limit) {
-        this.currentLimit = len
-        this.$emit('change', value)
-      } else {
-        const str = cutStrByFullLength(value, this.limit)
-        this.currentLimit = getStrFullLength(str)
-        this.$emit('change', str)
-      }
-    },
-    calcLimitNum (val) {
-      const len = getStrFullLength(val)
-      this.currentLimit = len
-    }
-  },
-  render () {
-    const { prefixCls, ...props } = this.$props
-    return (
-      <div class={this.prefixCls}>
-        <TextArea {...{ props }} value={this.value} onChange={this.handleChange}>
-        </TextArea>
-        <span class="limit">{this.currentLimit}/{this.limit}</span>
-      </div>
-    )
-  }
-}