feat(voice-input): 改进音频消息处理，支持音频时长和指令文本，优化后端交互

lang/en-us/ai-chat/index.js

@@ -22,8 +22,19 @@ export const lang = {
 	// ====== ai-chat-message ======
 	aiNickname: 'AI Assistant',
 	defaultNickname: 'Me',
+	// PR-FRONTEND-VOICE-INPUT (2026-09-24): query text for attachment-only messages
+	//   audioMessage / videoMessage: short label for the user-bubble filename fallback (still used by bubble template)
+	//   *Instruction* keys: explicit directive sent to the AI as the query.
+	//     Just a label gets ignored — the AI needs an explicit "please listen/look"
+	//     to actually invoke STT/vision/file parsing on the attachment payload.
 	audioMessage: 'Voice Message',
 	videoMessage: 'Video Message',
+	audioInstruction: 'I sent a voice message. Please listen to it and reply.',
+	audioInstructionWithDuration: 'I sent a voice message ({seconds}s). Please listen to it and reply.',
+	imageInstruction: 'I sent an image. Please look at it and reply.',
+	videoInstruction: 'I sent a video. Please watch it and reply.',
+	fileInstruction: 'I sent a file. Please review it and reply.',
+	attachmentInstruction: 'I sent attachments. Please review them and reply.',
 	inputPlaceholder: 'Please enter your question...',
 	expandEditorTitle: 'Edit Content',
 	loadMoreHistory: 'Load more history',

lang/zh-cn/ai-chat/index.js

@@ -22,8 +22,18 @@ export const lang = {
 	// ====== ai-chat-message ======
 	aiNickname: '智能助手',
 	defaultNickname: '我',
+	// PR-FRONTEND-VOICE-INPUT (2026-09-24): 纯附件时发给后端的 query 文案
+	//   audioMessage / videoMessage: 用户气泡里文件名的兜底 (短标签, 仍在 bubble 模板用)
+	//   *Instruction* 系列: 纯附件时发给 AI 的 query, 显式要求 AI "去看/听" 附件内容
+	//   AI 必须看到指令才会主动调 STT / 视觉 / 文件解析, 光有 label 容易被忽略
 	audioMessage: '语音消息',
 	videoMessage: '视频消息',
+	audioInstruction: '我发送了一段语音，请听一下并回复我',
+	audioInstructionWithDuration: '我发送了一段语音（{seconds} 秒），请听一下并回复我',
+	imageInstruction: '我发送了一张图片，请查看图片内容并回复我',
+	videoInstruction: '我发送了一段视频，请查看视频内容并回复我',
+	fileInstruction: '我发送了一个文件，请查看文件内容并回复我',
+	attachmentInstruction: '我发送了附件，请查看附件内容并回复我',
 	inputPlaceholder: '请输入您的问题...',
 	expandEditorTitle: '编辑内容',
 	loadMoreHistory: '加载更多历史消息',