first commit

icons/app.png

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+<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256" viewBox="0 0 256 256">
+  <defs>
+    <linearGradient id="appGrad" x1="0%" y1="0%" x2="0%" y2="100%">
+      <stop offset="0%" style="stop-color:#2196F3;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#1565C0;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+  <rect width="256" height="256" rx="48" fill="url(#appGrad)"/>
+  <g fill="white" transform="translate(48, 48)">
+    <!-- 校验仪图标 -->
+    <rect x="20" y="0" width="120" height="160" rx="12" fill="white"/>
+    <rect x="32" y="16" width="96" height="60" rx="4" fill="#2196F3"/>
+    <!-- 显示屏 -->
+    <text x="80" y="52" font-family="Arial" font-size="20" fill="white" text-anchor="middle" font-weight="bold">12.345</text>
+    <text x="80" y="68" font-family="Arial" font-size="10" fill="white" text-anchor="middle">mA</text>
+    <!-- 按钮 -->
+    <circle cx="50" cy="100" r="12" fill="#4CAF50"/>
+    <circle cx="80" cy="100" r="12" fill="#FF9800"/>
+    <circle cx="110" cy="100" r="12" fill="#F44336"/>
+    <!-- 端子 -->
+    <circle cx="50" cy="140" r="8" fill="#757575"/>
+    <circle cx="80" cy="140" r="8" fill="#757575"/>
+    <circle cx="110" cy="140" r="8" fill="#757575"/>
+  </g>
+</svg>