refactor(speaking-evaluation): 重构听读评测页面代码结构与逻辑

- 重构了组件的脚本部分，优化状态管理与函数组织
- 统一管理TTS合成与播放逻辑，提升代码可维护性
- 优化ASR语音识别流程，增加错误处理和状态反馈
- 改进AI评测接口调用及结果解析逻辑，确保稳定性
- 清理录音和播放资源，防止内存泄漏
- 重新编排模板结构，提升交互体验和代码可读性
- 优化样式细节，增强界面一致性和响应式表现

src/views/SpeakingEvaluation.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { ref, computed, onUnmounted, nextTick } from "vue";
+import { ref, computed, watch, onUnmounted } from "vue";
 import { useRouter } from "vue-router";
 import {
   DOUBAO_APP_ID,
@@ -40,10 +40,37 @@ let asrAudioContext = null;
 let asrScriptProcessor = null;
 let asrMediaStream = null;
 let recognizedText = ref("");
+const interimText = ref("");
+
+// ── 录音计时器 ──
+let recordingTimer = null;
+const recordingSeconds = ref(0);
 
 // ── 评测结果 ──
 const evaluationResult = ref(null);
 const isEvaluating = ref(false);
+const evaluationHistory = ref([]); // 最近3次评测记录
+
+// ── 评分等级 ──
+const scoreLevel = computed(() => {
+  const s = evaluationResult.value?.overallScore ?? 0;
+  if (s >= 90) return { label: "优秀", cls: "score-excellent" };
+  if (s >= 70) return { label: "良好", cls: "score-good" };
+  return { label: "继续加油", cls: "score-poor" };
+});
+
+// ── 差异对比 ──
+const diffWords = computed(() => {
+  if (!evaluationResult.value || !currentWord.value) return [];
+  const standard = currentWord.value.toLowerCase().trim().split(/\s+/);
+  const actual = (recognizedText.value || "").toLowerCase().trim().split(/\s+/);
+  return standard.map((word, i) => {
+    const actualWord = actual[i] || "";
+    if (!actualWord) return { word, status: "missing", actual: "" };
+    if (actualWord === word) return { word, status: "correct", actual: actualWord };
+    return { word, status: "wrong", actual: actualWord };
+  });
+});
 
 // ── 音色选择 ──
 const selectedVoice = ref("en_female_dacey_uranus_bigtts");
@@ -92,9 +119,21 @@ const parseText = () => {
   wordList.value = [...new Set(items)];
 };
 
+// ── TTS 音频缓存 ──
+const audioCache = new Map(); // key: `${text}_${voice}`
+
+watch(selectedVoice, () => {
+  audioCache.clear();
+});
+
 // ── TTS 语音合成 ──
 const synthesizeAndPlay = async (text) => {
   if (!text || !text.trim()) return;
+  const cacheKey = `${text}_${selectedVoice.value}`;
+  if (audioCache.has(cacheKey)) {
+    playAudio(audioCache.get(cacheKey));
+    return;
+  }
 
   const payload = {
     user: { uid: "eval_" + Date.now() },
@@ -162,6 +201,8 @@ const synthesizeAndPlay = async (text) => {
     const url = URL.createObjectURL(blob);
     blobUrls.push(url);
 
+    const cacheKey2 = `${text}_${selectedVoice.value}`;
+    audioCache.set(cacheKey2, url);
     playAudio(url);
   } catch (err) {
     console.error("TTS error:", err);
@@ -200,6 +241,9 @@ const handleWordClick = (index) => {
   currentWordIndex.value = index;
   playingIndex.value = index;
   evaluationResult.value = null; // 清空之前的评测结果
+  evaluationHistory.value = []; // 切换单词时清空历史
+  recognizedText.value = "";
+  interimText.value = "";
   synthesizeAndPlay(wordList.value[index]);
 };
 
@@ -269,6 +313,12 @@ const parseServerFrame = (buffer) => {
 const stopRecording = async () => {
   isRecording.value = false;
   asrStatus.value = "";
+  // 清除录音计时器
+  if (recordingTimer) {
+    clearInterval(recordingTimer);
+    recordingTimer = null;
+  }
+  recordingSeconds.value = 0;
 
   if (asrScriptProcessor) {
     asrScriptProcessor.disconnect();
@@ -304,16 +354,21 @@ const stopRecording = async () => {
 
   // 识别完成后进行评测
   if (recognizedText.value && currentWord.value) {
+    interimText.value = "";
     await evaluatePronunciation();
   }
 };
 
-const startRecording = async () => {
-  if (isRecording.value) {
+// 点击切换录音
+const toggleRecording = async () => {
+  if (isRecording.value || asrStatus.value === "connecting") {
     await stopRecording();
     return;
   }
+  await startRecording();
+};
 
+const startRecording = async () => {
   if (!currentWord.value) {
     alert("请先点击要评测的单词或句子");
     return;
@@ -381,6 +436,9 @@ const startRecording = async () => {
         const hasFinal = result.utterances?.some((u) => u.definite === true);
         if (hasFinal) {
           recognizedText.value = text;
+          interimText.value = "";
+        } else {
+          interimText.value = text;
         }
       } catch (e) {
         console.error("ASR parse error:", e);
@@ -432,6 +490,9 @@ const startRecording = async () => {
 
     isRecording.value = true;
     asrStatus.value = "recording";
+    // 启动计时器
+    recordingSeconds.value = 0;
+    recordingTimer = setInterval(() => recordingSeconds.value++, 1000);
   } catch (err) {
     console.error("ASR start error:", err);
     stopRecording();
@@ -485,7 +546,16 @@ const evaluatePronunciation = async () => {
     // 提取 JSON
     const jsonMatch = resultText.match(/\{[\s\S]*\}/);
     if (jsonMatch) {
-      evaluationResult.value = JSON.parse(jsonMatch[0]);
+      const parsed = JSON.parse(jsonMatch[0]);
+      evaluationResult.value = parsed;
+      // 追加历史记录
+      evaluationHistory.value.unshift({
+        overallScore: parsed.overallScore,
+        accuracy: parsed.accuracy,
+        fluency: parsed.fluency,
+        time: new Date().toLocaleTimeString(),
+      });
+      if (evaluationHistory.value.length > 3) evaluationHistory.value.pop();
     } else {
       throw new Error("无法解析评测结果");
     }
@@ -511,6 +581,14 @@ onUnmounted(() => {
   }
   blobUrls.forEach((url) => URL.revokeObjectURL(url));
   blobUrls.length = 0;
+  // 清理音频缓存
+  audioCache.forEach((url) => URL.revokeObjectURL(url));
+  audioCache.clear();
+  // 清理计时器
+  if (recordingTimer) {
+    clearInterval(recordingTimer);
+    recordingTimer = null;
+  }
   stopRecording();
 });
 </script>
@@ -638,11 +716,7 @@ onUnmounted(() => {
               error: asrStatus === 'error',
             }"
             :disabled="!currentWord || isEvaluating"
-            @mousedown="startRecording"
-            @mouseup="stopRecording"
-            @mouseleave="isRecording && stopRecording()"
-            @touchstart.prevent="startRecording"
-            @touchend.prevent="stopRecording"
+            @click="toggleRecording"
           >
             <div v-if="asrStatus === 'connecting'" class="btn-spinner"></div>
             <div v-else-if="isRecording" class="recording-content">
@@ -656,7 +730,7 @@ onUnmounted(() => {
                   d="M12 1a4 4 0 0 1 4 4v6a4 4 0 0 1-8 0V5a4 4 0 0 1 4-4zm0 2a2 2 0 0 0-2 2v6a2 2 0 0 0 4 0V5a2 2 0 0 0-2-2zm-1 14.93V20H9v2h6v-2h-2v-2.07A7.001 7.001 0 0 0 19 11h-2a5 5 0 0 1-10 0H5a7.001 7.001 0 0 0 6 6.93z"
                 />
               </svg>
-              <span>录音中...</span>
+              <span>录音中 {{ recordingSeconds }}s 点击停止</span>
             </div>
             <template v-else>
               <svg
@@ -668,10 +742,19 @@ onUnmounted(() => {
                   d="M12 1a4 4 0 0 1 4 4v6a4 4 0 0 1-8 0V5a4 4 0 0 1 4-4zm0 2a2 2 0 0 0-2 2v6a2 2 0 0 0 4 0V5a2 2 0 0 0-2-2zm-1 14.93V20H9v2h6v-2h-2v-2.07A7.001 7.001 0 0 0 19 11h-2a5 5 0 0 1-10 0H5a7.001 7.001 0 0 0 6 6.93z"
                 />
               </svg>
-              <span>按住跟读评测</span>
+              <span>点击开始跟读评测</span>
             </template>
           </button>
 
+          <!-- ASR 识别文本展示 -->
+          <div v-if="recognizedText || interimText" class="recognized-text-card">
+            <span class="recognized-label">识别结果：</span>
+            <span
+              class="recognized-content"
+              :class="{ interim: !recognizedText && interimText }"
+            >{{ recognizedText || interimText }}</span>
+          </div>
+
           <!-- 评测结果 -->
           <div v-if="isEvaluating" class="result-loading">
             <div class="loading-spinner"></div>
@@ -679,6 +762,26 @@ onUnmounted(() => {
           </div>
 
           <div v-else-if="evaluationResult" class="result-section">
+            <!-- 历史评分趋势 -->
+            <div v-if="evaluationHistory.length > 1" class="history-trend">
+              <span class="history-label">近期记录：</span>
+              <div class="history-dots">
+                <div
+                  v-for="(h, i) in evaluationHistory"
+                  :key="i"
+                  class="history-dot"
+                  :class="{
+                    'dot-excellent': h.overallScore >= 90,
+                    'dot-good': h.overallScore >= 70 && h.overallScore < 90,
+                    'dot-poor': h.overallScore < 70,
+                  }"
+                >
+                  <span class="dot-score">{{ h.overallScore }}</span>
+                  <span class="dot-time">{{ h.time }}</span>
+                </div>
+              </div>
+            </div>
+
             <div class="score-display">
               <div class="score-circle">
                 <svg class="score-svg" viewBox="0 0 100 100">
@@ -688,17 +791,21 @@ onUnmounted(() => {
                     cy="50"
                     r="45"
                     class="score-progress"
+                    :class="scoreLevel.cls"
                     :style="{
                       strokeDashoffset:
                         283 - (283 * evaluationResult.overallScore) / 100,
                     }"
                   ></circle>
                 </svg>
-                <div class="score-value">
+                <div class="score-value" :class="scoreLevel.cls">
                   {{ evaluationResult.overallScore }}
                 </div>
               </div>
               <div class="score-label">综合评分</div>
+              <div class="score-level-badge" :class="scoreLevel.cls">
+                {{ scoreLevel.label }}
+              </div>
             </div>
 
             <div class="detail-scores">
@@ -726,6 +833,44 @@ onUnmounted(() => {
               </div>
             </div>
 
+            <!-- 差异对比（多词时展示） -->
+            <div
+              v-if="diffWords.length > 1"
+              class="diff-section"
+            >
+              <h4>对比分析</h4>
+              <div class="diff-row">
+                <span class="diff-meta">标准：</span>
+                <div class="diff-words">
+                  <span
+                    v-for="(d, i) in diffWords"
+                    :key="i"
+                    class="diff-word"
+                    :class="{
+                      'diff-correct': d.status === 'correct',
+                      'diff-wrong': d.status === 'wrong',
+                      'diff-missing': d.status === 'missing',
+                    }"
+                  >{{ d.word }}</span>
+                </div>
+              </div>
+              <div class="diff-row" v-if="recognizedText">
+                <span class="diff-meta">实际：</span>
+                <div class="diff-words">
+                  <span
+                    v-for="(d, i) in diffWords"
+                    :key="i"
+                    class="diff-word"
+                    :class="{
+                      'diff-correct': d.status === 'correct',
+                      'diff-wrong': d.status === 'wrong',
+                      'diff-missing': d.status === 'missing',
+                    }"
+                  >{{ d.actual || '—' }}</span>
+                </div>
+              </div>
+            </div>
+
             <div
               v-if="
                 evaluationResult.errors && evaluationResult.errors.length > 0
@@ -1390,6 +1535,208 @@ onUnmounted(() => {
   color: var(--text-secondary);
 }
 
+/* 识别文本卡片 */
+.recognized-text-card {
+  margin-top: 1rem;
+  padding: 0.875rem 1rem;
+  background: rgba(255, 255, 255, 0.04);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  border-radius: 10px;
+  display: flex;
+  flex-wrap: wrap;
+  align-items: baseline;
+  gap: 0.5rem;
+}
+
+.recognized-label {
+  font-size: 0.8125rem;
+  color: var(--text-secondary);
+  white-space: nowrap;
+}
+
+.recognized-content {
+  font-size: 1rem;
+  font-weight: 500;
+  color: var(--text-primary);
+  line-height: 1.5;
+}
+
+.recognized-content.interim {
+  color: var(--text-secondary);
+  font-style: italic;
+}
+
+/* 历史评分趋势 */
+.history-trend {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  margin-bottom: 1.25rem;
+  padding: 0.875rem 1rem;
+  background: rgba(255, 255, 255, 0.03);
+  border: 1px solid rgba(255, 255, 255, 0.07);
+  border-radius: 10px;
+  flex-wrap: wrap;
+}
+
+.history-label {
+  font-size: 0.8125rem;
+  color: var(--text-secondary);
+  white-space: nowrap;
+}
+
+.history-dots {
+  display: flex;
+  gap: 0.75rem;
+  flex-wrap: wrap;
+}
+
+.history-dot {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 2px;
+  padding: 0.4rem 0.75rem;
+  border-radius: 8px;
+  border: 1px solid transparent;
+}
+
+.history-dot.dot-excellent {
+  background: rgba(34, 197, 94, 0.12);
+  border-color: rgba(34, 197, 94, 0.3);
+}
+
+.history-dot.dot-good {
+  background: rgba(234, 179, 8, 0.12);
+  border-color: rgba(234, 179, 8, 0.3);
+}
+
+.history-dot.dot-poor {
+  background: rgba(239, 68, 68, 0.12);
+  border-color: rgba(239, 68, 68, 0.3);
+}
+
+.dot-score {
+  font-size: 1rem;
+  font-weight: 700;
+  line-height: 1;
+}
+
+.dot-excellent .dot-score { color: #22c55e; }
+.dot-good .dot-score { color: #eab308; }
+.dot-poor .dot-score { color: #ef4444; }
+
+.dot-time {
+  font-size: 0.6875rem;
+  color: var(--text-secondary);
+}
+
+/* 评分等级应用 */
+.score-level-badge {
+  margin-top: 0.5rem;
+  font-size: 0.875rem;
+  font-weight: 600;
+  padding: 0.25rem 0.875rem;
+  border-radius: 20px;
+}
+
+.score-excellent .score-level-badge,
+.score-level-badge.score-excellent {
+  background: rgba(34, 197, 94, 0.15);
+  color: #22c55e;
+}
+
+.score-good .score-level-badge,
+.score-level-badge.score-good {
+  background: rgba(234, 179, 8, 0.15);
+  color: #eab308;
+}
+
+.score-poor .score-level-badge,
+.score-level-badge.score-poor {
+  background: rgba(239, 68, 68, 0.15);
+  color: #ef4444;
+}
+
+/* 评分进度条着色 */
+.score-progress.score-excellent { stroke: #22c55e; }
+.score-progress.score-good { stroke: #eab308; }
+.score-progress.score-poor { stroke: #ef4444; }
+
+/* 分数数字着色 */
+.score-value.score-excellent { color: #22c55e; }
+.score-value.score-good { color: #eab308; }
+.score-value.score-poor { color: #ef4444; }
+
+/* 差异对比區 */
+.diff-section {
+  background: rgba(255, 255, 255, 0.03);
+  border: 1px solid rgba(255, 255, 255, 0.08);
+  border-radius: 12px;
+  padding: 1rem;
+  margin-bottom: 1rem;
+}
+
+.diff-section h4 {
+  margin: 0 0 0.75rem;
+  font-size: 0.875rem;
+  font-weight: 600;
+  color: var(--text-primary);
+}
+
+.diff-row {
+  display: flex;
+  align-items: flex-start;
+  gap: 0.5rem;
+  margin-bottom: 0.5rem;
+}
+
+.diff-row:last-child {
+  margin-bottom: 0;
+}
+
+.diff-meta {
+  font-size: 0.75rem;
+  color: var(--text-secondary);
+  white-space: nowrap;
+  min-width: 36px;
+  padding-top: 2px;
+}
+
+.diff-words {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.375rem;
+}
+
+.diff-word {
+  font-size: 0.9375rem;
+  font-weight: 500;
+  padding: 0.2rem 0.5rem;
+  border-radius: 6px;
+  border: 1px solid transparent;
+}
+
+.diff-correct {
+  color: #22c55e;
+  background: rgba(34, 197, 94, 0.1);
+  border-color: rgba(34, 197, 94, 0.25);
+}
+
+.diff-wrong {
+  color: #ef4444;
+  background: rgba(239, 68, 68, 0.1);
+  border-color: rgba(239, 68, 68, 0.25);
+  text-decoration: line-through;
+}
+
+.diff-missing {
+  color: #f97316;
+  background: rgba(249, 115, 22, 0.1);
+  border-color: rgba(249, 115, 22, 0.25);
+  font-style: italic;
+}
+
 /* 响应式 */
 @media (max-width: 1024px) {
   .main-content {