feat: 添加确认模态框并优化音频生成流程

- 新增确认生成模态框组件，支持多语言显示
- 调整音频时长选项为"5分钟左右"和"8-15分钟"
- 优化Docker配置，添加.env和config目录挂载
- 改进音频生成流程，增加静音修剪功能
- 更新多语言翻译文件，添加确认相关文本
- 修复播客内容组件中overview_content处理逻辑
- 优化中间件配置，排除robots.txt和sitemap.xml
- 完善Docker使用文档，补充挂载点说明
- 改进播客脚本提示词，增强对话深度要求

Dockerfile-Web

@@ -14,9 +14,6 @@ RUN npm install --frozen-lockfile \
 # Copy the rest of the application code (web directory content)
 COPY web .
 
-# Copy parent config directory
-COPY config ../config
-
 # Build the Next.js application
 # The `standalone` output mode creates a self-contained application
 ENV NEXT_TELEMETRY_DISABLED 1
@@ -34,16 +31,12 @@ RUN npm install @libsql/linux-x64-musl
 # Set production environment
 ENV NODE_ENV production
 
-COPY web/.env  ./web/.env
 COPY web/sqlite.db ./web/sqlite.db
 # Copy standalone application and public assets from the builder stage
 COPY --from=builder /app/web/.next/standalone ./web/
 COPY --from=builder /app/web/.next/static ./web/.next/static
 COPY --from=builder /app/web/public ./web/public
 
-# Copy parent config directory from builder stage to runner stage
-COPY --from=builder /app/config ./config
-
 # Expose port (Next.js default port)
 EXPOSE 3000