feat: merge PVE VM management + local features

- Merge PVE (Proxmox VE) virtual machine management from remote
  - PVE host CRUD API
  - VM status query / start / stop operations
  - PVE database tables and models
  - Frontend VM status display and control buttons
  - SPA routing fix for nested asset paths

- Keep local features:
  - Change password functionality
  - Log cleanup service
  - Docker containerization (Dockerfile + docker-compose)
  - Empty machine ping log spam fix
  - settings table for admin password storage

- Update machines handlers to support PVE fields
- Update frontend API client with PVE endpoints

.dockerignore

@@ -0,0 +1,68 @@
+# Git
+.git
+.gitignore
+.gitattributes
+
+# Node.js
+web/node_modules/
+web/dist/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Go
+server/lan-manager
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+vendor/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# 构建产物
+lan-manager
+lan-manager-darwin
+lan-manager-linux
+lan-manager.exe
+server/static/
+
+# 数据（构建时不需要，运行时通过 volume 挂载）
+data/
+*.db
+*.db-journal
+*.db-wal
+*.db-shm
+
+# 部署包
+deploy/
+*.tar.gz
+
+# 日志
+*.log
+logs/
+
+# Playwright MCP
+.playwright-mcp/
+
+# 测试
+coverage/
+*.cover
+*.coverage
+
+# 文档（构建时不需要）
+docs/
+
+# 临时文件
+tmp/
+temp/
+*.tmp