fix: ISSUE #I68566 下载列表错位，图标错误

DownloadItem 原始定义高度为 54px，上下边距各 4px；然而图片 label 高度定义为 48，且宽度未定义，明显放不下；DownloadListWidget 中添加 item 时，设置每个 item sizeHint 高度只有 50px，与 item 高度不一致

Log: 固定 DownloadItem 高度为 56px；修改 DownloadListWidget 添加 item 时每个 item 的 sizeHint 高度；使用 DLabel 替换 QLabel 用于单个 item 中应用名称显示，使用 setElideMode 保证名称过长时右边显示省略号，并添加鼠标悬浮提示

src/widgets/common/downloaditem.cpp

@@ -22,6 +22,8 @@ DownloadItem::DownloadItem(QWidget *parent) : QWidget(parent),
     ui->pushButton_3->hide();
     ui->widget_spinner->start();
     ui->widget_spinner->hide();
+
+    ui->label->setElideMode(Qt::TextElideMode::ElideRight);
 }
 
 DownloadItem::~DownloadItem()
@@ -48,6 +50,7 @@ void DownloadItem::setMax(qint64 max)
 void DownloadItem::setName(QString name)
 {
     ui->label->setText(name);
+    ui->label->setToolTip(name);
 }
 
 QString DownloadItem::getName()

src/widgets/common/downloaditem.ui

@@ -7,13 +7,25 @@
     <x>0</x>
     <y>0</y>
     <width>666</width>
-    <height>54</height>
+    <height>56</height>
    </rect>
   </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>0</width>
+    <height>56</height>
+   </size>
+  </property>
   <property name="maximumSize">
    <size>
     <width>16777215</width>
-    <height>54</height>
+    <height>56</height>
    </size>
   </property>
   <property name="windowTitle">
@@ -40,10 +52,22 @@
    </property>
    <item>
     <widget class="QLabel" name="label_3">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="minimumSize">
+      <size>
+       <width>48</width>
+       <height>48</height>
+      </size>
+     </property>
      <property name="maximumSize">
       <size>
        <width>48</width>
-       <height>16777215</height>
+       <height>48</height>
       </size>
      </property>
      <property name="text">
@@ -52,6 +76,9 @@
      <property name="scaledContents">
       <bool>true</bool>
      </property>
+     <property name="alignment">
+      <set>Qt::AlignCenter</set>
+     </property>
     </widget>
    </item>
    <item>
@@ -70,6 +97,31 @@
      </property>
     </spacer>
    </item>
+   <item>
+    <widget class="DLabel" name="label">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="minimumSize">
+      <size>
+       <width>80</width>
+       <height>48</height>
+      </size>
+     </property>
+     <property name="maximumSize">
+      <size>
+       <width>120</width>
+       <height>48</height>
+      </size>
+     </property>
+     <property name="text">
+      <string>Name</string>
+     </property>
+    </widget>
+   </item>
    <item>
     <widget class="QLabel" name="label_filename">
      <property name="maximumSize">
@@ -83,33 +135,6 @@
      </property>
     </widget>
    </item>
-   <item>
-    <widget class="QLabel" name="label">
-     <property name="minimumSize">
-      <size>
-       <width>80</width>
-       <height>0</height>
-      </size>
-     </property>
-     <property name="maximumSize">
-      <size>
-       <width>16777215</width>
-       <height>16777215</height>
-      </size>
-     </property>
-     <property name="font">
-      <font>
-       <pointsize>13</pointsize>
-      </font>
-     </property>
-     <property name="text">
-      <string>Name</string>
-     </property>
-     <property name="wordWrap">
-      <bool>true</bool>
-     </property>
-    </widget>
-   </item>
    <item>
     <spacer name="horizontalSpacer_2">
      <property name="orientation">
@@ -153,11 +178,14 @@
       <property name="leftMargin">
        <number>0</number>
       </property>
+      <property name="topMargin">
+       <number>8</number>
+      </property>
       <property name="rightMargin">
        <number>0</number>
       </property>
       <property name="bottomMargin">
-       <number>0</number>
+       <number>8</number>
       </property>
       <item>
        <widget class="QProgressBar" name="progressBar">
@@ -297,6 +325,11 @@
    <header location="global">dspinner.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>DLabel</class>
+   <extends>QLabel</extends>
+   <header>dlabel.h</header>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>

src/widgets/downloadlistwidget.cpp

@@ -91,7 +91,7 @@ void DownloadListWidget::addItem(QString name, QString fileName, QString pkgName
     di->pkgName = pkgName;
     di->seticon(icon);
     QListWidgetItem *pItem = new QListWidgetItem();
-    pItem->setSizeHint(QSize(240, 50));
+    pItem->setSizeHint(QSize(240, 56)); // ui 中单个 downloaditem 高度固定 56px（上下 margin 8px，图片固定 48x48）
     ui->listWidget->addItem(pItem);
     ui->listWidget->setItemWidget(pItem, di);
     if (!isBusy)

src/widgets/downloadlistwidget.ui

@@ -85,7 +85,7 @@ QListWidget::item::selected
 }</string>
      </property>
      <property name="frameShape">
-      <enum>QFrame::StyledPanel</enum>
+      <enum>QFrame::NoFrame</enum>
      </property>
      <property name="verticalScrollBarPolicy">
       <enum>Qt::ScrollBarAsNeeded</enum>
@@ -99,9 +99,15 @@ QListWidget::item::selected
      <property name="autoScrollMargin">
       <number>10</number>
      </property>
+     <property name="editTriggers">
+      <set>QAbstractItemView::NoEditTriggers</set>
+     </property>
      <property name="resizeMode">
       <enum>QListView::Fixed</enum>
      </property>
+     <property name="spacing">
+      <number>4</number>
+     </property>
     </widget>
    </item>
    <item>