deploy: Ubuntu desktop as root Dockerfile; add push-debug workflow doc; generic monitor retries and sync retry

docs: ubuntu-desktop README 增加部署后监控与压测说明（通用脚本）

docs: 通用用法 GENERAL_USAGE + README/ubuntu-desktop 强调通用、用户最少步骤

fix: monitor_and_test.py global declaration before use

chore: add remote logs doc + monitor script, restore Dockerfile pip step

fix: sync_hf.py try block indentation (SyntaxError)

HuggingRun: 通用接口 + HF 限制文档 + APP_PORT + ubuntu-desktop 示例

HuggingRun: Run anything on Hugging Face — generic Docker + persistence