fix: 修复 Windows 平台中 Could not find Opus library 的问题

[Yang-ZhiHang]

平台：Windows11
项目版本：0.9.2
问题描述：安装好 requirement.txt 内的依赖后，运行 app.py 文件显示找不到 opuslib。具体报错如下：

Traceback (most recent call last):
  File "D:\code\dev\xiaozhi-esp32-server\main\xiaozhi-server\app.py", line 8, in <module>
    from core.utils.util import get_local_ip, validate_mcp_endpoint
  File "D:\code\dev\xiaozhi-esp32-server\main\xiaozhi-server\core\utils\util.py", line 11, in <module>
    import opuslib_next
  File "D:\code\dev\xiaozhi-esp32-server\.venv\lib\site-packages\opuslib_next\__init__.py", line 19, in <module>
    from .exceptions import OpusError  # NOQA
  File "D:\code\dev\xiaozhi-esp32-server\.venv\lib\site-packages\opuslib_next\exceptions.py", line 10, in <module>
    import opuslib_next.api.info
  File "D:\code\dev\xiaozhi-esp32-server\.venv\lib\site-packages\opuslib_next\api\__init__.py", line 44, in <module>
    raise Exception("Could not find Opus library. Make sure it is installed.")
Exception: Could not find Opus library. Make sure it is installed.

解决方案：通过在本地添加 opuslib 二进制文件，并在运行前进行加载即可解决此问题。

[Copilot]

Pull request overview

该 PR 旨在解决 Windows 11 环境下运行 app.py 时 opuslib_next 报 “Could not find Opus library” 的问题，通过在应用启动早期主动定位并加载项目内置的 Opus 动态库来避免导入失败。

Changes:

• 新增 utils/system_info.py：实现跨平台的 Opus 动态库查找、（可选）复制与加载逻辑，并对 ctypes.util.find_library 进行补丁。
• 新增 utils/finder.py / utils/constant.py：提供 libs 目录定位与项目根目录常量。
• 更新 app.py：在其他模块导入前调用 setup_opus() 以确保 Opus 库可用。

Reviewed changes

Copilot reviewed 4 out of 7 changed files in this pull request and generated 4 comments.

File	Description
main/xiaozhi-server/utils/system_info.py	增加 Opus 动态库查找/加载与 find_library 补丁逻辑
main/xiaozhi-server/utils/finder.py	增加 libs 目录定位辅助方法
main/xiaozhi-server/utils/constant.py	增加项目根目录 APP_DIR 常量
main/xiaozhi-server/app.py	启动时优先执行 setup_opus()，避免后续 opuslib_next 导入失败

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[Yang-ZhiHang]

已经对内容进行修改：

• 将新增内容迁移到 config/opus_loader.py 目录中；
• 将 cdll 句柄添加到 sys 中进行持久化；
• 添加对 setup_opus() 函数结果的处理；

适配了日志输出：

(xiaozhi-esp32-server) PS D:\code\dev\xiaozhi-esp32-server\main\xiaozhi-server> uv run .\app.py
260418 14:09:33[0.9.2_00000000000000][config.opus_loader]-INFO-检测到平台架构: windows x64
260418 14:09:33[0.9.2_00000000000000][config.opus_loader]-INFO-尝试从系统路径加载 Opus 库
260418 14:09:33[0.9.2_00000000000000][config.opus_loader]-INFO-系统路径未找到，尝试从本地加载 Opus 库
260418 14:09:33[0.9.2_00000000000000][config.opus_loader]-INFO-成功加载 Opus 库: D:\code\dev\xiaozhi-esp32-server\main\xiaozhi-server\libs\win\x64\opus.dll
260418 14:09:33[0.9.2_00000000000000][core.utils.gc_manager]-INFO-启动全局GC管理器，间隔300秒
...

[Copilot]

Pull request overview

Copilot reviewed 2 out of 5 changed files in this pull request and generated 5 comments.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 5 changed files in this pull request and generated 4 comments.

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