Merge pull request #33 from Lazy-CZ/fix/export-audio-fix

fix: 修复批量导出 wav 音频语速变快、音调升高（采样率不匹配）问题

tests/unit/voice-service.test.ts

@@ -2,6 +2,29 @@ import { describe, expect, it, vi } from 'vitest'
 import { VoiceService } from '../../src/main/voice-service'
 
 describe('VoiceService batch lookup', () => {
+  it('writes the decoded sample rate and duration into batch WAV output', async () => {
+    const getVoiceDataBatch = vi.fn().mockResolvedValue([{ success: true, hex: '0102' }])
+    const service = new VoiceService({ getVoiceDataBatch } as never)
+    const decoder = (service as unknown as {
+      decoderRegistry: { decode: ReturnType<typeof vi.fn> }
+    }).decoderRegistry
+    vi.spyOn(decoder, 'decode').mockResolvedValue({
+      pcm: Buffer.alloc(16_000 * 2),
+      sampleRate: 16_000,
+      channels: 1
+    })
+
+    const [result] = await service.resolveVoices([
+      { sessionId: 'session', localId: 10, createTime: 100, svrId: '1000' }
+    ])
+
+    expect(result.success).toBe(true)
+    const wav = Buffer.from(result.data!, 'base64')
+    expect(wav.readUInt32LE(24)).toBe(16_000)
+    expect(wav.readUInt16LE(22)).toBe(1)
+    expect((wav.length - 44) / (wav.readUInt32LE(24) * wav.readUInt16LE(22) * 2)).toBe(1)
+  })
+
   it('retries failed batch entries with the compatible single-item lookup', async () => {
     const getVoiceDataBatch = vi.fn().mockResolvedValue([
       { success: false, error: '获取语音数据失败' },