feat: build CoffeeChat mini program and backend

miniprogram/images/arrow.svg

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+<svg width="8px" height="14px" viewBox="0 0 8 14" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>☀ iOS/☀ 图标/线型/icons_outlined_arrow@3x</title>
+    <g id="控件" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" fill-opacity="0.3">
+        <g id="4.列表/z.覆盖层/右边/箭头" transform="translate(-334.000000, -21.000000)" fill="#000000">
+            <g id="☀-iOS/☀-图标/线型/icons_outlined_arrow" transform="translate(332.000000, 16.000000)">
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+            </g>
+        </g>
+    </g>
+</svg>

miniprogram/images/copy.svg

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+</svg>

miniprogram/images/icons/customer-service.svg

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+</svg>

miniprogram/images/icons/question.svg

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+</svg>

miniprogram/images/icons/setting.svg

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+</svg>

miniprogram/images/icons/share.svg

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+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
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+</svg>