docs: 添加涉密文件自检工具实施计划

UmiOCR-data/qt_res/qml/TabPages/About/UrlButton.qml

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+// 网页链接按钮
+
+import QtQuick 2.15
+import QtQuick.Controls 2.15
+
+import "../../Widgets"
+
+Button_ {
+    id: btn
+    property string url: ""
+    // toolTip: url
+    height: size_.text + size_.spacing * 2
+    bgHoverColor_: theme.coverColor1
+    
+    contentItem: Text_ {
+        text: btn.text_
+        horizontalAlignment: Text.AlignHCenter
+        verticalAlignment: Text.AlignVCenter
+        color: theme.specialTextColor
+
+        // 手动绘制下划线，减少抖动现象。不使用 font.underline
+        Rectangle {
+            anchors.left: parent.left
+            anchors.right: parent.right
+            anchors.bottom: parent.bottom
+            anchors.bottomMargin: -2
+            height: 1
+            color: theme.specialTextColor
+        }
+    }
+
+    onClicked: {
+        Qt.openUrlExternally(url)
+    }
+}