feat(voice): 语音参数移入 config.js + 设置页男女声切换

- config: 新增 tts.female/male 两组参数(voiceType/volume/speed),
  直接改数字即可调音色,无需改逻辑代码
- storage: getSettings 兜底 voiceGender(旧用户迁移为女声)
- voice: 新增 _getTtsParams 读 config+性别;缓存 key 含完整参数,
  改音色/音量/性别自动重新合成,无需手动清缓存
- settings: 训练偏好加"语音音色"segmented(女声/男声)
- tts 云函数: _synthesize 用传入 opts 合成;_upload 路径含 voiceType
  (男/女不同文件);需重新部署

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

cloudfunctions/tts/index.js

@@ -30,7 +30,7 @@ const PROMPTS = {
 
 const CACHE_DIR = 'tts-cache'
 
-const _synthesize = async (text, promptKey) => {
+const _synthesize = async (text, promptKey, opts) => {
   let TtsClient
   try {
     TtsClient = require('tencentcloud-sdk-nodejs').tts.v20190823.Client
@@ -52,17 +52,17 @@ const _synthesize = async (text, promptKey) => {
   const res = await client.TextToVoice({
     Text: text,
     SessionId: `${promptKey}-${Date.now()}-${Math.random().toString(36).slice(2, 10)}`,
-    VoiceType: 101001,    // 智瑜,温柔女声
+    VoiceType: (opts && opts.voiceType) || 101001,    // 智瑜,温柔女声
     Codec: 'mp3',
     SampleRate: 16000,
-    Speed: 0,
-    Volume: 5
+    Speed: (opts && opts.speed != null) ? opts.speed : 0,
+    Volume: (opts && opts.volume != null) ? opts.volume : 5
   })
   return Buffer.from(res.Audio, 'base64')
 }
 
-const _upload = async (key, buffer) => {
-  const cloudPath = `${CACHE_DIR}/${key}.mp3`
+const _upload = async (key, buffer, voiceType) => {
+  const cloudPath = `${CACHE_DIR}/${key}-${voiceType || 'default'}.mp3`
   // uploadFile returns the canonical fileID (e.g. "cloud://env.xxx/...").
   // We must use THAT — not the relative cloudPath we passed in — when
   // calling getTempFileURL. A self-constructed fileID is invalid.
@@ -71,7 +71,7 @@ const _upload = async (key, buffer) => {
 }
 
 exports.main = async (event) => {
-  const { promptKey, fileID } = event || {}
+  const { promptKey, fileID, voiceType, volume, speed } = event || {}
   const text = PROMPTS[promptKey]
   if (!text) {
     return { success: false, error: `Unknown prompt key: ${promptKey}` }
@@ -93,8 +93,8 @@ exports.main = async (event) => {
 
   // Slow path: synthesize + upload + return fresh fileID for caching
   try {
-    const buffer = await _synthesize(text, promptKey)
-    const newFileID = await _upload(promptKey, buffer)
+    const buffer = await _synthesize(text, promptKey, { voiceType, volume, speed })
+    const newFileID = await _upload(promptKey, buffer, voiceType)
     const urlRes = await cloud.getTempFileURL({ fileList: [newFileID] })
     const url = urlRes.fileList[0].tempFileURL
     if (!url) {