feat: 新增语音转文字（ASR）功能

- 后端：新增 /api/audio/transcribe 接口，调用 Ollama whisper 进行语音识别
- 前端：新增 AudioTranscribePage.vue 页面，支持 MP3/WAV/M4A/OGG/FLAC 等格式
- 注册路由、工具卡片、智能助手欢迎语更新

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

docs/02_Architecture/AR01_Backend_Arch.md

@@ -81,7 +81,7 @@ from fastapi import FastAPI
 from app.api import auth, company_train, product, sales_train
 from app.api import exam, media, ai_chat, system
 
-app = FastAPI(title="eaisalestrain_app", version="1.1.0")
+app = FastAPI(title="eai_agentplatform_app", version="1.1.0")
 
 # 异常处理器
 @app.exception_handler(AppError)

docs/02_Architecture/AR04_Deploy_Arch.md

@@ -80,7 +80,7 @@ location /api/ {
 
 # 媒体文件预览（仅内部）
 location /media/ {
-    alias /opt/eaisalestrain/backend/data/media/;
+    alias /opt/eai_agentplatform/backend/data/media/;
     internal;
 }
 
@@ -95,8 +95,8 @@ services:
   mysql:
     image: mysql:8.0
     environment:
-      MYSQL_DATABASE: eaisalestrain
-      MYSQL_USER: eaisalestrain
+      MYSQL_DATABASE: eai_agentplatform
+      MYSQL_USER: eai_agentplatform
       MYSQL_PASSWORD: ${DB_PASSWORD}
     volumes:
       - mysql_data:/var/lib/mysql
@@ -104,7 +104,7 @@ services:
   backend:
     build: ./backend
     environment:
-      DATABASE_URL: mysql+pymysql://eaisalestrain:${DB_PASSWORD}@mysql:3306/eaisalestrain
+      DATABASE_URL: mysql+pymysql://eai_agentplatform:${DB_PASSWORD}@mysql:3306/eai_agentplatform
       JWT_SECRET: ${JWT_SECRET}
       LLM_BASE_URL: http://llm-server:11434/v1
     volumes: