docs(comments): 注释中文化 · internal/runtime/multimodal（21 文件，纯替换）

- 只翻注释/文档字符串，代码零变化：go/scanner 词法流比对 21 文件 token+字面量全等，增删行数 1:1（467/467）
- 刻意保留非散文英文：JSON Schema description、工具 Description() 返回值、adapter prompt、API 路径与命令示例、环境变量名
- 逐行确认代码前缀未变，未触碰其他模块

internal/runtime/multimodal/voice/dashscope_live_test.go

@@ -12,9 +12,9 @@ import (
 	"git.yeij.top/AskaEth/Cyrene_v2/internal/config"
 )
 
-// TestDashscopeLive verifies the real Alibaba Bailian STT + TTS end to end. It is
-// excluded from the default suite (build tag dashscope_live) so `go test ./...`
-// never hits the paid API. Run it explicitly with the key sourced from .env:
+// TestDashscopeLive 端到端验证真实的阿里百炼 STT + TTS。它
+// 被排除在默认测试集之外（构建标签 dashscope_live），使 `go test ./...`
+// 绝不触碰付费 API。用从 .env 取到的 key 显式运行：
 //
 //	set -a; source .env; set +a
 //	go test -tags dashscope_live -run TestDashscopeLive -v ./internal/runtime/multimodal/voice/
@@ -25,7 +25,7 @@ func TestDashscopeLive(t *testing.T) {
 	}
 	cfg := config.VoiceConfig{DashscopeAPIKey: key}
 
-	// TTS: synthesize speech for a short line.
+	// TTS：为一句短文本合成语音。
 	tts := NewDashscopeTTS(cfg)
 	audio, err := tts.TTS(context.Background(), "你好，我是昔涟")
 	if err != nil {
@@ -36,7 +36,7 @@ func TestDashscopeLive(t *testing.T) {
 		t.Fatal("TTS returned empty audio")
 	}
 
-	// STT closed loop: transcribe the synthesized speech back to text.
+	// STT 闭环：把合成的语音转写回文字。
 	stt := NewDashscopeSTT(cfg)
 	text, err := stt.STT(context.Background(), Audio{Format: "wav", Data: audio.Data})
 	if err != nil {
@@ -44,7 +44,7 @@ func TestDashscopeLive(t *testing.T) {
 	}
 	t.Logf("STT (of TTS audio): text=%q", text)
 
-	// STT on a generated silence wav, to confirm the empty-audio path is accepted.
+	// 对生成的静音 wav 做 STT，确认空音频路径可被接受。
 	silence := silentWAVBytes(1, 16000)
 	sttText, sttErr := stt.STT(context.Background(), Audio{Format: "wav", Data: silence})
 	if sttErr != nil {
@@ -53,8 +53,8 @@ func TestDashscopeLive(t *testing.T) {
 		t.Logf("STT (silence): text=%q", sttText)
 	}
 
-	// Exercise the degrading chain (the same object the gateway wires), proving it
-	// returns real bytes/text rather than degrading to the silent terminal rung.
+	// 走一遍降级链（网关接线的就是同一个对象），证明它
+	// 返回真实的字节/文字，而不是降级到静默末端一级。
 	ch := New(cfg)
 	chTTS, chTTSErr := ch.TTS(context.Background(), "你好，我是昔涟")
 	if chTTSErr != nil {
@@ -74,21 +74,21 @@ func TestDashscopeLive(t *testing.T) {
 	}
 }
 
-// silentWAVBytes builds a mono 16-bit 16 kHz silence WAV of durS seconds.
+// silentWAVBytes 构造 durS 秒的单声道 16 位 16 kHz 静音 WAV。
 func silentWAVBytes(durS, sampleRate int) []byte {
 	dataLen := durS * sampleRate * 2
 	buf := &bytes.Buffer{}
-	// RIFF header + fmt chunk + data chunk.
+	// RIFF 头 + fmt 块 + data 块。
 	buf.WriteString("RIFF")
 	_ = binary.Write(buf, binary.LittleEndian, uint32(36+dataLen))
 	buf.WriteString("WAVEfmt ")
 	_ = binary.Write(buf, binary.LittleEndian, uint32(16))
 	_ = binary.Write(buf, binary.LittleEndian, uint16(1)) // PCM
-	_ = binary.Write(buf, binary.LittleEndian, uint16(1)) // mono
+	_ = binary.Write(buf, binary.LittleEndian, uint16(1)) // 单声道
 	_ = binary.Write(buf, binary.LittleEndian, uint32(sampleRate))
 	_ = binary.Write(buf, binary.LittleEndian, uint32(sampleRate*2))
-	_ = binary.Write(buf, binary.LittleEndian, uint16(2))  // block align
-	_ = binary.Write(buf, binary.LittleEndian, uint16(16)) // bits per sample
+	_ = binary.Write(buf, binary.LittleEndian, uint16(2))  // 块对齐
+	_ = binary.Write(buf, binary.LittleEndian, uint16(16)) // 每样本位数
 	buf.WriteString("data")
 	_ = binary.Write(buf, binary.LittleEndian, uint32(dataLen))
 	buf.Write(make([]byte, dataLen))