feat: 新增 Proxmox provider 支持及 inject_steps 参数

- 新增 desktop_env/providers/proxmox/ (manager + provider)
- desktop_env.py: 添加 proxmox 到 provider 名称列表
- providers/__init__.py: 工厂函数注册 proxmox provider
- run.py: 新增 --inject_steps/--no_inject_steps 参数
- run_proxmox.sh: Proxmox 运行脚本

desktop_env/providers/proxmox/manager.py

@@ -0,0 +1,49 @@
+import logging
+import os
+
+from desktop_env.providers.base import VMManager
+
+logger = logging.getLogger("desktopenv.providers.proxmox.ProxmoxVMManager")
+logger.setLevel(logging.INFO)
+
+
+class ProxmoxVMManager(VMManager):
+    """
+    Simplified VM manager for Proxmox.
+
+    Unlike VMware/VirtualBox, Proxmox VMs are pre-created on the server.
+    This manager does not handle VM provisioning, downloading, or local
+    registry management. The VM ID is passed directly via --path_to_vm.
+    """
+
+    def __init__(self, registry_path=""):
+        pass
+
+    def initialize_registry(self, **kwargs):
+        pass
+
+    def add_vm(self, vm_path, **kwargs):
+        pass
+
+    def delete_vm(self, vm_path, **kwargs):
+        pass
+
+    def occupy_vm(self, vm_path, pid, **kwargs):
+        pass
+
+    def list_free_vms(self, **kwargs):
+        return []
+
+    def check_and_clean(self, **kwargs):
+        pass
+
+    def get_vm_path(self, os_type="Windows", region=None, screen_size=(1920, 1080), **kwargs):
+        """Return the VM ID from environment variable or default.
+
+        For Proxmox, the VM is pre-created. The VM ID should be passed
+        via --path_to_vm argument. This method is only called when
+        --path_to_vm is not provided.
+        """
+        vmid = os.environ.get("PROXMOX_VM_ID", "102")
+        logger.info(f"Using Proxmox VM ID: {vmid}")
+        return vmid