refactor: 工具栏按钮简化为 截图阅卷/评分标准/其它(下拉)/设置

src/components/FloatingToolbar.vue

@@ -1,35 +1,29 @@
 <template>
   <div class="floating-toolbar" :class="{ 'is-hidden': !appStore.isToolbarVisible }">
     <div class="toolbar-buttons">
-      <el-button class="toolbar-btn" @click="startScreenshot">
+      <el-button class="toolbar-btn" @click="startScreenshot" :loading="appStore.isGrading">
         <span class="btn-icon">📷</span>
-        <span class="btn-label">截图</span>
+        <span class="btn-label">{{ appStore.isGrading ? '阅卷中...' : '截图阅卷' }}</span>
-      </el-button>
-
-      <el-button class="toolbar-btn" @click="selectImage">
-        <span class="btn-icon">📁</span>
-        <span class="btn-label">图片</span>
-      </el-button>
-
-      <el-button class="toolbar-btn" @click="startGrading" :loading="appStore.isGrading">
-        <span class="btn-icon">⚡</span>
-        <span class="btn-label">{{ appStore.isGrading ? '阅卷中...' : '阅卷' }}</span>
       </el-button>
 
       <el-button class="toolbar-btn" @click="openRubric">
         <span class="btn-icon">📋</span>
-        <span class="btn-label">标准</span>
+        <span class="btn-label">评分标准</span>
       </el-button>
 
-      <el-button class="toolbar-btn" @click="openTemplates">
+      <el-dropdown trigger="click" @command="handleMenu">
-        <span class="btn-icon">📚</span>
+        <el-button class="toolbar-btn">
-        <span class="btn-label">模板</span>
+          <span class="btn-icon">📎</span>
-      </el-button>
+          <span class="btn-label">其它</span>
-
+        </el-button>
-      <el-button class="toolbar-btn" @click="openHistory">
+        <template #dropdown>
-        <span class="btn-icon">📜</span>
+          <el-dropdown-menu>
-        <span class="btn-label">历史</span>
+            <el-dropdown-item command="image">📁 图片阅卷</el-dropdown-item>
-      </el-button>
+            <el-dropdown-item command="templates">📚 模板</el-dropdown-item>
+            <el-dropdown-item command="history">📜 历史</el-dropdown-item>
+          </el-dropdown-menu>
+        </template>
+      </el-dropdown>
 
       <el-button class="toolbar-btn" @click="openSettings">
         <span class="btn-icon">⚙</span>
@@ -76,10 +70,16 @@ async function selectImage() {
   const data = await window.electronAPI.dialog.openImage()
   if (data) {
     gradingStore.setImage(data.base64)
-    ElMessage.success('已选择图片')
+    startGrading()
   }
 }
 
+async function handleMenu(cmd: string) {
+  if (cmd === 'image') await selectImage()
+  else if (cmd === 'templates') window.electronAPI?.dialog.open('templates')
+  else if (cmd === 'history') window.electronAPI?.dialog.open('history')
+}
+
 async function gradeQuestion(questionIdx: number) {
   const questions = gradingStore.questions
   if (!questions.length) {