feat: OneKeyStart.bat 增强启动器 - 预检诊断 + 日志记录

[doomsday616]

Summary

Enhanced OneKeyStart.bat with a Python-based pre-flight check system (launch.py) that validates the environment before launching Streamlit. Silently logs diagnostics to logs/ — only shows output when problems are detected.

增强 OneKeyStart.bat，新增 Python 启动器 launch.py，在启动 Streamlit 前自动检查环境。诊断信息静默写入 logs/ 目录，只在检测到问题时才在屏幕上显示。

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What it checks / 检查项

Check	On failure
streamlit installed	ERROR - blocks startup
json_repair installed	ERROR - blocks startup
torch + CUDA available	WARN - continues (CPU fallback)
whisperx installed	WARN - continues
ffmpeg in PATH	ERROR - blocks startup
Port 8501 available	WARN - continues

Behavior / 行为

• Everything OK → zero console output, straight into Streamlit (same as original)
• Warnings (no CUDA, etc.) → 1-2 line warnings, continues startup
• Blocking errors (missing packages, no ffmpeg) → shows errors, stops with guidance
• All diagnostics silently logged to logs/startup_YYYYMMDD_HHMMSS.log
• Suppresses noisy Python/Streamlit warnings (pynvml FutureWarning, use_container_width deprecation)

一切正常时屏幕零输出，直接进 Streamlit。有问题才显示。所有诊断写入日志文件。

Files changed / 改动文件

File	Change
OneKeyStart.bat	Calls launch.py instead of directly running streamlit; suppresses Python warnings
launch.py	New - Pre-flight checks + Streamlit launcher with logging
.gitignore	Added logs/
docs/pages/docs/start.zh-CN.md	Fixed: 一键启动.bat → OneKeyStart.bat
docs/pages/docs/start.en-US.md	Added OneKeyStart.bat mention in step 4

Testing / 测试

Tested on Windows 11 by double-clicking OneKeyStart.bat:

• ✅ conda activate works correctly
• ✅ All checks pass silently
• ✅ Streamlit launches with clean output
• ✅ Log file created in logs/
• ✅ Warnings suppressed (pynvml, use_container_width)