增加小程序，修改游戏前端

games/minipro/calculation/miniprogram/pages/unit-converter/unit-converter.json

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+{
+  "usingComponents": {},
+  "navigationBarTitleText": "单位换算"
+}

games/minipro/calculation/miniprogram/pages/unit-converter/unit-converter.ts

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+
+Page({
+  data: {
+    categories: ['长度', '面积', '体积', '重量', '温度'],
+    categoryIndex: 0,
+    
+    units: {
+      '长度': [
+        { name: '米', factor: 1 },
+        { name: '千米', factor: 1000 },
+        { name: '分米', factor: 0.1 },
+        { name: '厘米', factor: 0.01 },
+        { name: '毫米', factor: 0.001 },
+        { name: '微米', factor: 0.000001 },
+        { name: '纳米', factor: 0.000000001 },
+        { name: '英里', factor: 1609.344 },
+        { name: '海里', factor: 1852 },
+        { name: '码', factor: 0.9144 },
+        { name: '英尺', factor: 0.3048 },
+        { name: '英寸', factor: 0.0254 }
+      ],
+      '面积': [
+        { name: '平方米', factor: 1 },
+        { name: '平方千米', factor: 1000000 },
+        { name: '公顷', factor: 10000 },
+        { name: '公亩', factor: 100 },
+        { name: '平方英里', factor: 2589988.11 },
+        { name: '英亩', factor: 4046.8564 },
+        { name: '平方码', factor: 0.836127 },
+        { name: '平方英尺', factor: 0.092903 },
+        { name: '平方英寸', factor: 0.000645 }
+      ],
+      '体积': [
+        { name: '立方米', factor: 1 },
+        { name: '立方分米', factor: 0.001 },
+        { name: '立方厘米', factor: 0.000001 },
+        { name: '升', factor: 0.001 },
+        { name: '分升', factor: 0.0001 },
+        { name: '毫升', factor: 0.000001 },
+        { name: '立方英尺', factor: 0.028317 },
+        { name: '立方英寸', factor: 0.000016 },
+        { name: '立方码', factor: 0.764555 }
+      ],
+      '重量': [
+        { name: '千克', factor: 1 },
+        { name: '克', factor: 0.001 },
+        { name: '毫克', factor: 0.000001 },
+        { name: '吨', factor: 1000 },
+        { name: '磅', factor: 0.453592 },
+        { name: '盎司', factor: 0.02835 },
+        { name: '克拉', factor: 0.0002 }
+      ],
+      '温度': [
+        { name: '摄氏度', type: 'C' },
+        { name: '华氏度', type: 'F' },
+        { name: '开氏度', type: 'K' }
+      ]
+    },
+    
+    currentUnits: [] as any[],
+    fromIndex: 0,
+    toIndex: 1,
+    inputValue: '',
+    outputValue: ''
+  },
+
+  onLoad() {
+    this.updateCurrentUnits();
+  },
+
+  updateCurrentUnits() {
+    const category = this.data.categories[this.data.categoryIndex];
+    // @ts-ignore
+    const units = this.data.units[category];
+    this.setData({
+      currentUnits: units,
+      fromIndex: 0,
+      toIndex: 1,
+      inputValue: '',
+      outputValue: ''
+    });
+  },
+
+  bindCategoryChange(e: any) {
+    this.setData({
+      categoryIndex: e.detail.value
+    });
+    this.updateCurrentUnits();
+  },
+
+  bindFromUnitChange(e: any) {
+    this.setData({
+      fromIndex: e.detail.value
+    });
+    this.calculate();
+  },
+
+  bindToUnitChange(e: any) {
+    this.setData({
+      toIndex: e.detail.value
+    });
+    this.calculate();
+  },
+
+  bindInput(e: any) {
+    this.setData({
+      inputValue: e.detail.value
+    });
+    this.calculate();
+  },
+
+  calculate() {
+    const val = parseFloat(this.data.inputValue);
+    if (isNaN(val)) {
+      this.setData({ outputValue: '' });
+      return;
+    }
+
+    const category = this.data.categories[this.data.categoryIndex];
+    if (category === '温度') {
+      this.calculateTemperature(val);
+    } else {
+      this.calculateStandard(val);
+    }
+  },
+
+  calculateStandard(val: number) {
+    const fromUnit = this.data.currentUnits[this.data.fromIndex];
+    const toUnit = this.data.currentUnits[this.data.toIndex];
+    
+    // Convert to base unit then to target unit
+    const baseVal = val * fromUnit.factor;
+    const result = baseVal / toUnit.factor;
+    
+    this.setData({
+      outputValue: this.formatResult(result)
+    });
+  },
+
+  calculateTemperature(val: number) {
+    const fromUnit = this.data.currentUnits[this.data.fromIndex];
+    const toUnit = this.data.currentUnits[this.data.toIndex];
+    
+    let celsius = val;
+    // Convert to Celsius first
+    if (fromUnit.type === 'F') {
+      celsius = (val - 32) * 5 / 9;
+    } else if (fromUnit.type === 'K') {
+      celsius = val - 273.15;
+    }
+    
+    // Convert from Celsius to target
+    let result = celsius;
+    if (toUnit.type === 'F') {
+      result = celsius * 9 / 5 + 32;
+    } else if (toUnit.type === 'K') {
+      result = celsius + 273.15;
+    }
+    
+    this.setData({
+      outputValue: this.formatResult(result)
+    });
+  },
+  
+  formatResult(val: number): string {
+      if (Math.abs(val) < 0.000001 || Math.abs(val) > 10000000) {
+          return val.toExponential(4);
+      }
+      return parseFloat(val.toPrecision(6)).toString();
+  }
+});

games/minipro/calculation/miniprogram/pages/unit-converter/unit-converter.wxml

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+<view class="container">
+  <view class="section">
+    <picker bindchange="bindCategoryChange" value="{{categoryIndex}}" range="{{categories}}">
+      <view class="picker">
+        当前分类：{{categories[categoryIndex]}}
+      </view>
+    </picker>
+  </view>
+
+  <view class="converter-box">
+    <view class="input-group">
+      <input type="digit" placeholder="输入数值" bindinput="bindInput" value="{{inputValue}}" />
+      <picker bindchange="bindFromUnitChange" value="{{fromIndex}}" range="{{currentUnits}}" range-key="name">
+        <view class="unit-picker">
+          {{currentUnits[fromIndex].name}}
+        </view>
+      </picker>
+    </view>
+
+    <view class="separator">=</view>
+
+    <view class="input-group">
+      <view class="result-display">{{outputValue}}</view>
+      <picker bindchange="bindToUnitChange" value="{{toIndex}}" range="{{currentUnits}}" range-key="name">
+        <view class="unit-picker">
+          {{currentUnits[toIndex].name}}
+        </view>
+      </picker>
+    </view>
+  </view>
+</view>

games/minipro/calculation/miniprogram/pages/unit-converter/unit-converter.wxss

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+.container {
+  padding: 20px;
+}
+
+.section {
+  background: #f0f0f0;
+  border-radius: 8px;
+  margin-bottom: 20px;
+  padding: 10px;
+  text-align: center;
+}
+
+.picker {
+  font-size: 18px;
+  color: #333;
+}
+
+.converter-box {
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+}
+
+.input-group {
+  display: flex;
+  align-items: center;
+  border: 1px solid #ddd;
+  border-radius: 8px;
+  padding: 10px;
+  background: #fff;
+}
+
+.input-group input, .result-display {
+  flex: 1;
+  font-size: 24px;
+  height: 40px;
+  line-height: 40px;
+}
+
+.result-display {
+    min-height: 40px; 
+}
+
+.unit-picker {
+  margin-left: 10px;
+  padding: 5px 10px;
+  background: #eee;
+  border-radius: 4px;
+  font-size: 16px;
+}
+
+.separator {
+  text-align: center;
+  font-size: 30px;
+  color: #999;
+}