diff --git a/modules/i18n_messages/infra.py b/modules/i18n_messages/infra.py
index cab7dc25..a6f4bb52 100644
--- a/modules/i18n_messages/infra.py
+++ b/modules/i18n_messages/infra.py
@@ -152,6 +152,68 @@ MESSAGES = {
         "en-US": "bubblewrap is not installed inside the WSL sandbox distro '{distro}'. Re-run scripts/setup-wsl-sandbox.ps1 or run 'apk add bubblewrap' inside the distro",
     },
 
+    # ── modules/sandbox_setup_manager.py（沙箱环境一键安装） ──
+    "sandbox.setup_wsl_missing": {
+        "zh-CN": "未检测到可用的 WSL2（Windows Subsystem for Linux）",
+        "en-US": "No usable WSL2 (Windows Subsystem for Linux) detected",
+    },
+    "sandbox.setup_distro_missing": {
+        "zh-CN": "未找到沙箱发行版 '{distro}'",
+        "en-US": "Sandbox distro '{distro}' not found",
+    },
+    "sandbox.setup_bwrap_missing": {
+        "zh-CN": "沙箱发行版 '{distro}' 缺少 bubblewrap 组件",
+        "en-US": "Sandbox distro '{distro}' is missing bubblewrap",
+    },
+    "sandbox.setup_not_windows": {
+        "zh-CN": "仅 Windows 宿主机模式支持一键安装沙箱",
+        "en-US": "One-click sandbox setup is only supported on Windows host mode",
+    },
+    "sandbox.setup_not_host_mode": {
+        "zh-CN": "当前不是宿主机模式，无法安装沙箱",
+        "en-US": "Not in host mode; sandbox setup unavailable",
+    },
+    "sandbox.setup_script_missing": {
+        "zh-CN": "安装脚本 scripts/setup-wsl-sandbox.ps1 不存在",
+        "en-US": "Setup script scripts/setup-wsl-sandbox.ps1 not found",
+    },
+    "sandbox.setup_already_running": {
+        "zh-CN": "安装任务正在运行中",
+        "en-US": "A setup task is already running",
+    },
+    "sandbox.setup_enabling_wsl_log": {
+        "zh-CN": "正在请求管理员授权…",
+        "en-US": "Requesting administrator approval...",
+    },
+    "sandbox.setup_wsl_installing_log": {
+        "zh-CN": "授权通过，正在下载并安装 WSL2 组件…",
+        "en-US": "Approval granted; downloading and installing WSL2 components...",
+    },
+    "sandbox.setup_wsl_enabled_log": {
+        "zh-CN": "WSL2 已启用，继续安装沙箱发行版…",
+        "en-US": "WSL2 enabled, continuing with sandbox distro setup...",
+    },
+    "sandbox.setup_wsl_enable_failed": {
+        "zh-CN": "启用 WSL2 失败（可能未通过管理员授权）",
+        "en-US": "Failed to enable WSL2 (administrator approval may have been denied)",
+    },
+    "sandbox.setup_uac_timeout": {
+        "zh-CN": "等待管理员授权超时",
+        "en-US": "Timed out waiting for administrator approval",
+    },
+    "sandbox.setup_script_failed": {
+        "zh-CN": "安装脚本执行失败，详情见日志",
+        "en-US": "Setup script failed; see log for details",
+    },
+    "sandbox.setup_verify_failed": {
+        "zh-CN": "安装完成但验收检测未通过: {detail}",
+        "en-US": "Setup finished but verification failed: {detail}",
+    },
+    "sandbox.setup_bad_distro_name": {
+        "zh-CN": "发行版名称 '{distro}' 含非法字符（仅允许字母、数字、点、下划线、连字符）",
+        "en-US": "Distro name '{distro}' contains illegal characters (only letters, digits, dot, underscore, hyphen allowed)",
+    },
+
     # ── modules/user_container_manager.py（用户容器管理器） ──
     "container_mgr.quota_exhausted": {
         "zh-CN": "资源繁忙：容器配额已用尽，请稍候再试。",
diff --git a/modules/sandbox_setup_manager.py b/modules/sandbox_setup_manager.py
new file mode 100644
index 00000000..533d1108
--- /dev/null
+++ b/modules/sandbox_setup_manager.py
@@ -0,0 +1,462 @@
+# modules/sandbox_setup_manager.py - Windows WSL 沙箱环境检测与一键安装管理
+#
+# 背景：Windows 宿主机模式的命令沙箱依赖专用 WSL2 发行版（默认 astrion-sandbox，
+# Alpine + bubblewrap，关闭 interop）。此前缺失时只在首次执行命令时被动报错，
+# 本模块提供：
+#   1. get_sandbox_status()  —— 主动分级检测（wsl_missing / distro_missing / bwrap_missing / ready）
+#   2. start_setup()         —— 后台线程执行 scripts/setup-wsl-sandbox.ps1，逐步解析进度
+#   3. get_setup_progress()  —— 前端轮询进度（阶段 / 步骤 / 日志尾部 / 下载字节数）
+#
+# 注意：
+# - 安装进程由后端 server 直接在宿主机拉起（direct），不走 run_command 沙箱链路
+#   （沙箱尚未建立，属于"鸡生蛋"场景，由前端用户显式点击触发）。
+# - WSL 功能未启用时先经 UAC 提权执行 wsl --install --no-distribution，可能需要重启。
+# - 进度仅保存在内存（一次性操作，无需持久化）。
+
+from __future__ import annotations
+
+import os
+import re
+import shutil
+import subprocess
+import sys
+import threading
+import time
+import urllib.request
+from pathlib import Path
+from typing import Any, Dict, List, Optional
+
+from modules.host_sandbox_runner import WSL_DEFAULT_SANDBOX_DISTRO, _wsl_distro_name
+from modules.i18n import tr
+
+_REPO_ROOT = Path(__file__).resolve().parents[1]
+_SETUP_SCRIPT = _REPO_ROOT / "scripts" / "setup-wsl-sandbox.ps1"
+
+# 与 scripts/setup-wsl-sandbox.ps1 默认 RootfsUrl 保持一致（用于 HEAD 估算下载总量）
+_ROOTFS_URL = (
+    "https://mirrors.aliyun.com/alpine/v3.21/releases/x86_64/"
+    "alpine-minirootfs-3.21.3-x86_64.tar.gz"
+)
+# ps1 中下载的临时文件路径（%TEMP%\astrion-alpine-minirootfs.tar.gz）
+_ROOTFS_TEMP_NAME = "astrion-alpine-minirootfs.tar.gz"
+
+_STEP_RE = re.compile(r"^==>\s*\[(\d+)/(\d+)\]\s*(.+)$")
+_STEP_TOTAL = 6
+_LOG_TAIL_MAX = 30
+_STATUS_CACHE_TTL = 10.0
+
+# 阶段常量
+PHASE_IDLE = "idle"
+PHASE_ENABLING_WSL = "enabling_wsl"
+PHASE_INSTALLING_WSL = "installing_wsl"
+PHASE_INSTALLING = "installing"
+PHASE_VERIFYING = "verifying"
+PHASE_DONE = "done"
+PHASE_NEEDS_REBOOT = "needs_reboot"
+PHASE_ERROR = "error"
+
+
+def _wsl_env() -> Dict[str, str]:
+    """子进程环境：强制 wsl.exe 输出 UTF-8（默认 UTF-16 会乱码）。"""
+    env = dict(os.environ)
+    env["WSL_UTF8"] = "1"
+    return env
+
+
+def _run_probe(argv: List[str], timeout: float = 20.0) -> subprocess.CompletedProcess:
+    # stdin=DEVNULL 必须：wsl --uninstall 后 stub 会输出交互式提示并等待按键 60 秒，
+    # 继承 stdin 时探测直接卡死；关闭 stdin 后 0.1s 返回 rc=1（实测验证）。
+    return subprocess.run(
+        argv,
+        stdin=subprocess.DEVNULL,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        text=True,
+        encoding="utf-8",
+        errors="replace",
+        env=_wsl_env(),
+        timeout=timeout,
+        creationflags=getattr(subprocess, "CREATE_NO_WINDOW", 0),
+    )
+
+
+def _wsl_available() -> bool:
+    """WSL 功能是否可用（wsl.exe 存在且能正常列出发行版）。
+
+    未安装任何发行版时 `wsl -l -q` 返回空但 exit==0；
+    WSL 功能未启用 / 虚拟机平台缺失时 exit!=0。
+    """
+    wsl = shutil.which("wsl.exe")
+    if not wsl:
+        return False
+    try:
+        proc = _run_probe([wsl, "-l", "-q"])
+        return proc.returncode == 0
+    except Exception:
+        return False
+
+
+def _distro_usable(distro: str) -> bool:
+    wsl = shutil.which("wsl.exe")
+    if not wsl:
+        return False
+    try:
+        return _run_probe([wsl, "-d", distro, "-e", "true"]).returncode == 0
+    except Exception:
+        return False
+
+
+def _bwrap_ready(distro: str) -> bool:
+    wsl = shutil.which("wsl.exe")
+    if not wsl:
+        return False
+    try:
+        return _run_probe([wsl, "-d", distro, "-e", "bwrap", "--version"]).returncode == 0
+    except Exception:
+        return False
+
+
+class SandboxSetupManager:
+    """沙箱状态检测 + 一键安装任务管理（进程级单例）。"""
+
+    def __init__(self) -> None:
+        self._lock = threading.Lock()
+        self._status_cache: Optional[Dict[str, Any]] = None
+        self._status_cache_at = 0.0
+        self._progress: Dict[str, Any] = self._fresh_progress()
+        self._worker: Optional[threading.Thread] = None
+
+    # ------------------------------------------------------------------ status
+
+    @staticmethod
+    def _applicable() -> bool:
+        if sys.platform != "win32":
+            return False
+        try:
+            from config import TERMINAL_SANDBOX_MODE
+        except Exception:
+            return False
+        return (TERMINAL_SANDBOX_MODE or "").lower() == "host"
+
+    def get_sandbox_status(self, force: bool = False) -> Dict[str, Any]:
+        """分级检测沙箱状态，带短 TTL 缓存（前端多处同时调用时防抖）。"""
+        with self._lock:
+            if (
+                not force
+                and self._status_cache is not None
+                and time.time() - self._status_cache_at < _STATUS_CACHE_TTL
+            ):
+                cached = dict(self._status_cache)
+                cached["setup_running"] = self._progress.get("active", False)
+                return cached
+
+        result: Dict[str, Any] = {
+            "applicable": False,
+            "platform": sys.platform,
+            "state": "not_applicable",
+            "distro_name": _wsl_distro_name() if self._applicable() else WSL_DEFAULT_SANDBOX_DISTRO,
+            "detail": "",
+        }
+        if self._applicable():
+            result["applicable"] = True
+            distro = result["distro_name"]
+            if not _wsl_available():
+                result["state"] = "wsl_missing"
+                result["detail"] = tr("sandbox.setup_wsl_missing")
+            elif not _distro_usable(distro):
+                result["state"] = "distro_missing"
+                result["detail"] = tr("sandbox.setup_distro_missing", distro=distro)
+            elif not _bwrap_ready(distro):
+                result["state"] = "bwrap_missing"
+                result["detail"] = tr("sandbox.setup_bwrap_missing", distro=distro)
+            else:
+                result["state"] = "ready"
+
+        with self._lock:
+            self._status_cache = result
+            self._status_cache_at = time.time()
+            out = dict(result)
+            out["setup_running"] = self._progress.get("active", False)
+            return out
+
+    def invalidate_status_cache(self) -> None:
+        with self._lock:
+            self._status_cache = None
+            self._status_cache_at = 0.0
+
+    # ----------------------------------------------------------------- progress
+
+    @staticmethod
+    def _fresh_progress() -> Dict[str, Any]:
+        return {
+            "active": False,
+            "phase": PHASE_IDLE,
+            "step_index": 0,
+            "step_total": _STEP_TOTAL,
+            "step_title": "",
+            "log_tail": [],
+            "download_bytes": None,
+            "download_total": None,
+            "error": None,
+            "error_kind": None,
+            "updated_at": time.time(),
+        }
+
+    def get_setup_progress(self) -> Dict[str, Any]:
+        with self._lock:
+            return dict(self._progress)
+
+    def _update_progress(self, **fields: Any) -> None:
+        with self._lock:
+            self._progress.update(fields)
+            self._progress["updated_at"] = time.time()
+
+    def _append_log(self, line: str) -> None:
+        line = line.rstrip()
+        if not line:
+            return
+        with self._lock:
+            tail: List[str] = self._progress["log_tail"]
+            tail.append(line)
+            if len(tail) > _LOG_TAIL_MAX:
+                del tail[: len(tail) - _LOG_TAIL_MAX]
+            self._progress["updated_at"] = time.time()
+
+    # -------------------------------------------------------------------- setup
+
+    def start_setup(self, enable_wsl_if_needed: bool) -> Dict[str, Any]:
+        """启动安装后台线程。返回 {"started": bool, "error": str|None}。"""
+        if sys.platform != "win32":
+            return {"started": False, "error": tr("sandbox.setup_not_windows")}
+        if not _SETUP_SCRIPT.exists():
+            return {"started": False, "error": tr("sandbox.setup_script_missing")}
+        with self._lock:
+            if self._progress.get("active"):
+                return {"started": False, "error": tr("sandbox.setup_already_running")}
+            self._progress = self._fresh_progress()
+            self._progress["active"] = True
+            self._progress["phase"] = PHASE_INSTALLING
+
+        self._worker = threading.Thread(
+            target=self._run_setup,
+            args=(enable_wsl_if_needed,),
+            name="sandbox-setup",
+            daemon=True,
+        )
+        self._worker.start()
+        return {"started": True, "error": None}
+
+    def _finish(self, phase: str, error: Optional[str] = None, error_kind: Optional[str] = None) -> None:
+        self._update_progress(active=False, phase=phase, error=error, error_kind=error_kind)
+        self.invalidate_status_cache()
+
+    def _run_setup(self, enable_wsl_if_needed: bool) -> None:
+        try:
+            # 阶段一：WSL 功能缺失时先提权安装（UAC 弹窗由用户在系统层确认）
+            if not _wsl_available():
+                if not enable_wsl_if_needed:
+                    self._finish(PHASE_ERROR, tr("sandbox.setup_wsl_missing"), "wsl_enable_failed")
+                    return
+                if not self._enable_wsl():
+                    return  # _enable_wsl 内部已 _finish
+
+            # 阶段二：跑安装脚本（6 步）
+            self._update_progress(phase=PHASE_INSTALLING)
+            download_total = self._probe_rootfs_size()
+            if download_total:
+                self._update_progress(download_total=download_total)
+            if not self._run_setup_script():
+                return  # 内部已 _finish
+
+            # 阶段三：验收（强制重新探测）
+            self._update_progress(phase=PHASE_VERIFYING)
+            status = self.get_sandbox_status(force=True)
+            if status.get("state") == "ready":
+                self._finish(PHASE_DONE)
+            else:
+                self._finish(
+                    PHASE_ERROR,
+                    tr("sandbox.setup_verify_failed", detail=status.get("detail") or status.get("state")),
+                    "verify_failed",
+                )
+        except Exception as exc:  # 兜底，防止线程无声死亡
+            self._finish(PHASE_ERROR, f"{type(exc).__name__}: {exc}", "unexpected")
+
+    def _enable_wsl(self) -> bool:
+        """UAC 提权执行 wsl --install --no-distribution。返回是否可继续安装。
+
+        Start-Process -Verb RunAs 在 UAC 弹窗期间阻塞：用户确认后返回进程对象、
+        拒绝时抛异常（exit 3）。利用这个时序用标记行把「等待授权」与
+        「下载安装 WSL 组件」拆成两个阶段，reader 线程实时解析，前端及时切换：
+          ASTRION_UAC_CONFIRMED     —— UAC 已通过，进入组件下载安装
+          ASTRION_WSL_INSTALL_EXIT  —— wsl --install 进程退出码
+          ASTRION_UAC_CANCELLED     —— 用户拒绝授权（exit 3）
+        """
+        self._update_progress(phase=PHASE_ENABLING_WSL)
+        self._append_log(tr("sandbox.setup_enabling_wsl_log"))
+        # 前缀先设控制台输出编码为 UTF-8：PS 5.1 默认按 GBK 输出，后端按 UTF-8 读会乱码
+        ps_command = (
+            "[Console]::OutputEncoding=[System.Text.Encoding]::UTF8; "
+            "try { $p = Start-Process wsl.exe -Verb RunAs "
+            "-ArgumentList '--install','--no-distribution' -PassThru -ErrorAction Stop } "
+            "catch { Write-Host 'ASTRION_UAC_CANCELLED'; exit 3 }; "
+            "Write-Host 'ASTRION_UAC_CONFIRMED'; $p.WaitForExit(); "
+            'Write-Host "ASTRION_WSL_INSTALL_EXIT=$($p.ExitCode)"'
+        )
+        proc = subprocess.Popen(
+            ["powershell", "-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", ps_command],
+            stdin=subprocess.DEVNULL,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT,
+            text=True,
+            encoding="utf-8",
+            errors="replace",
+            creationflags=getattr(subprocess, "CREATE_NO_WINDOW", 0),
+        )
+        install_exit: List[int] = []
+
+        def _reader() -> None:
+            assert proc.stdout is not None
+            for raw in proc.stdout:
+                line = raw.strip()
+                if not line:
+                    continue
+                if line == "ASTRION_UAC_CONFIRMED":
+                    self._update_progress(phase=PHASE_INSTALLING_WSL)
+                    self._append_log(tr("sandbox.setup_wsl_installing_log"))
+                elif line.startswith("ASTRION_WSL_INSTALL_EXIT="):
+                    try:
+                        install_exit.append(int(line.split("=", 1)[1]))
+                    except ValueError:
+                        pass
+                elif line != "ASTRION_UAC_CANCELLED":  # 由 returncode==3 统一判定，不进日志
+                    self._append_log(line)
+
+        reader = threading.Thread(target=_reader, name="sandbox-setup-uac", daemon=True)
+        reader.start()
+        try:
+            proc.wait(timeout=900)
+        except subprocess.TimeoutExpired:
+            proc.kill()
+            self._finish(PHASE_ERROR, tr("sandbox.setup_uac_timeout"), "uac_cancelled")
+            return False
+        reader.join(timeout=5)
+
+        if proc.returncode == 3:
+            self._finish(PHASE_ERROR, tr("sandbox.setup_wsl_enable_failed"), "uac_cancelled")
+            return False
+        if proc.returncode != 0 or not install_exit or install_exit[-1] != 0:
+            self._finish(PHASE_ERROR, tr("sandbox.setup_wsl_enable_failed"), "wsl_enable_failed")
+            return False
+        # 提权安装完成后复查：仍不可用 → 大概率需要重启（虚拟机平台刚启用）
+        if not _wsl_available():
+            self._finish(PHASE_NEEDS_REBOOT)
+            return False
+        self._append_log(tr("sandbox.setup_wsl_enabled_log"))
+        return True
+
+    def _run_setup_script(self) -> bool:
+        """执行 setup-wsl-sandbox.ps1，逐行解析进度。返回是否成功。"""
+        if not _SETUP_SCRIPT.exists():
+            self._finish(PHASE_ERROR, tr("sandbox.setup_script_missing"), "script_failed")
+            return False
+        download_stop = threading.Event()
+        download_thread = threading.Thread(
+            target=self._poll_download_size,
+            args=(download_stop,),
+            name="sandbox-setup-dlsize",
+            daemon=True,
+        )
+        download_thread.start()
+        try:
+            # 与检测逻辑保持同名：检测哪个发行版就装哪个（HOST_SANDBOX_WSL_DISTRO 自定义场景）。
+            # 发行版名来自环境变量，拼入 -Command 字符串前必须白名单校验，防命令注入。
+            distro = _wsl_distro_name()
+            if not re.fullmatch(r"[A-Za-z0-9._-]+", distro):
+                self._finish(
+                    PHASE_ERROR,
+                    tr("sandbox.setup_bad_distro_name", distro=distro),
+                    "script_failed",
+                )
+                return False
+            # 非默认名使用独立安装目录，避免与既有发行版的 VHDX 目录冲突（--import 要求空目录）。
+            # 用 -Command 包装并先设输出编码：-File 模式下若脚本解析失败（语法/编码问题），
+            # 脚本内的 OutputEncoding 设置来不及生效，错误消息会按 GBK 输出而后端读成乱码。
+            ps_parts = [f"& '{_SETUP_SCRIPT}'", "-DistroName", f"'{distro}'"]
+            if distro != WSL_DEFAULT_SANDBOX_DISTRO:
+                install_dir = Path.home() / ".astrion" / f"wsl-sandbox-{distro}"
+                ps_parts += ["-InstallDir", f"'{install_dir}'"]
+            ps_command = (
+                "[Console]::OutputEncoding=[System.Text.Encoding]::UTF8; "
+                + " ".join(ps_parts)
+            )
+            argv = [
+                "powershell",
+                "-NoProfile",
+                "-ExecutionPolicy",
+                "Bypass",
+                "-Command",
+                ps_command,
+            ]
+            proc = subprocess.Popen(
+                argv,
+                stdin=subprocess.DEVNULL,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.STDOUT,
+                text=True,
+                encoding="utf-8",
+                errors="replace",
+                env=_wsl_env(),
+                creationflags=getattr(subprocess, "CREATE_NO_WINDOW", 0),
+            )
+            assert proc.stdout is not None
+            for raw_line in proc.stdout:
+                line = raw_line.rstrip()
+                m = _STEP_RE.match(line.strip())
+                if m:
+                    self._update_progress(
+                        step_index=int(m.group(1)),
+                        step_total=int(m.group(2)),
+                        step_title=m.group(3).strip(),
+                    )
+                self._append_log(line)
+            proc.wait()
+            if proc.returncode != 0:
+                self._finish(PHASE_ERROR, tr("sandbox.setup_script_failed"), "script_failed")
+                return False
+            return True
+        except Exception as exc:
+            self._finish(PHASE_ERROR, f"{type(exc).__name__}: {exc}", "script_failed")
+            return False
+        finally:
+            download_stop.set()
+
+    def _poll_download_size(self, stop: threading.Event) -> None:
+        """安装阶段周期性 stat rootfs 临时文件大小，供前端展示下载量。"""
+        temp_dir = os.environ.get("TEMP") or os.environ.get("TMP") or ""
+        if not temp_dir:
+            return
+        target = Path(temp_dir) / _ROOTFS_TEMP_NAME
+        while not stop.wait(1.0):
+            with self._lock:
+                if self._progress.get("step_index") != 3:
+                    continue
+            try:
+                if target.exists():
+                    self._update_progress(download_bytes=target.stat().st_size)
+            except OSError:
+                pass
+
+    @staticmethod
+    def _probe_rootfs_size() -> Optional[int]:
+        """HEAD 请求 rootfs 下载地址估算总量（失败返回 None，前端退化为只显示已下载量）。"""
+        try:
+            req = urllib.request.Request(_ROOTFS_URL, method="HEAD")
+            with urllib.request.urlopen(req, timeout=8) as resp:
+                length = resp.headers.get("Content-Length")
+                return int(length) if length else None
+        except Exception:
+            return None
+
+
+sandbox_setup_manager = SandboxSetupManager()
diff --git a/scripts/setup-wsl-sandbox.ps1 b/scripts/setup-wsl-sandbox.ps1
index c6db9c7f..ee71f2d3 100644
--- a/scripts/setup-wsl-sandbox.ps1
+++ b/scripts/setup-wsl-sandbox.ps1
@@ -1,4 +1,4 @@
-# setup-wsl-sandbox.ps1 — 创建 astrion WSL2+bwrap 专用沙箱发行版
+# setup-wsl-sandbox.ps1 — 创建 astrion WSL2+bwrap 专用沙箱发行版
 #
 # 用法（PowerShell，普通用户即可，无需管理员）：
 #   powershell -ExecutionPolicy Bypass -File scripts\setup-wsl-sandbox.ps1
@@ -22,21 +22,31 @@ param(
 
 $ErrorActionPreference = "Stop"
 $env:WSL_UTF8 = "1"
+# 控制台与输出流统一 UTF-8：后端以管道读取本脚本输出，默认 GBK 会导致中文乱码
+[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
+$OutputEncoding = [System.Text.Encoding]::UTF8
 
 function Invoke-Wsl {
-    param([Parameter(ValueFromRemainingArguments=$true)][string[]]$Args)
-    $output = & wsl.exe @Args 2>&1 | Where-Object { $_ -notmatch "localhost 代理|localhost proxy" }
+    # PS 5.1 下 ValueFromRemainingArguments 会把 -d/-e 等 wsl 参数误绑定到函数通用参数
+    # （-e 前缀匹配 -ErrorAction/-ErrorVariable 报二义性错误），故改为单个数组传参，
+    # 调用处一律：Invoke-Wsl @('-d', $Name, '-e', 'true')
+    param([string[]]$WslArgs)
+    # PS 5.1 坑：全局 EAP=Stop 时原生命令写 stderr（如 wsl 的 localhost 代理警告）
+    # 会直接抛 NativeCommandError 终止脚本，Where 过滤来不及生效。
+    # 函数内降为 Continue（函数作用域，不影响全局 Stop 对其它命令的保护）。
+    $ErrorActionPreference = 'Continue'
+    $output = & wsl.exe @WslArgs 2>&1 | Where-Object { $_ -notmatch "localhost 代理|localhost proxy" }
     return @{ Code = $LASTEXITCODE; Output = ($output -join "`n") }
 }
 
 Write-Host "==> [1/6] 检查 WSL 环境"
-$null = Invoke-Wsl --status
-if ($LASTEXITCODE -ne 0) {
+$wslStatus = Invoke-Wsl @('--status')
+if ($wslStatus.Code -ne 0) {
     throw "WSL 不可用。请先启用 WSL2（wsl --install --no-distribution 或安装 Docker Desktop 后重试）。"
 }
 
 Write-Host "==> [2/6] 检查发行版 '$DistroName' 是否已存在"
-$probe = Invoke-Wsl -d $DistroName -e true
+$probe = Invoke-Wsl @('-d', $DistroName, '-e', 'true')
 if ($probe.Code -eq 0) {
     Write-Host "    发行版已存在，跳过导入（如需重建：wsl --unregister $DistroName）"
 } else {
@@ -49,38 +59,44 @@ if ($probe.Code -eq 0) {
 
     Write-Host "==> [4/6] 导入为 WSL2 发行版"
     New-Item -ItemType Directory -Force -Path $InstallDir | Out-Null
-    $null = Invoke-Wsl --import $DistroName $InstallDir $rootfs --version 2
-    $check = Invoke-Wsl -d $DistroName -e true
+    $null = Invoke-Wsl @('--import', $DistroName, $InstallDir, $rootfs, '--version', '2')
+    $check = Invoke-Wsl @('-d', $DistroName, '-e', 'true')
     if ($check.Code -ne 0) { throw "发行版导入失败: $($check.Output)" }
 }
 
 Write-Host "==> [5/6] 写入沙箱配置（关闭 interop / 固定 DNS / 国内镜像）"
 # 关闭 Windows 互操作：防止沙箱内经 cmd.exe 逃逸宿主机（PoC 已验证该逃逸路径）
-$null = Invoke-Wsl -d $DistroName -- sh -c "printf '[network]\ngenerateResolvConf = false\n\n[interop]\nenabled = false\nappendWindowsPath = false\n' > /etc/wsl.conf"
-$null = Invoke-Wsl -d $DistroName -- sh -c "rm -f /etc/resolv.conf && printf 'nameserver 223.5.5.5\nnameserver 119.29.29.29\n' > /etc/resolv.conf"
-$null = Invoke-Wsl -d $DistroName -- sh -c "printf '$ApkMirror/main\n$ApkMirror/community\n' > /etc/apk/repositories"
+$conf = Invoke-Wsl @('-d', $DistroName, '--', 'sh', '-c', "printf '[network]\ngenerateResolvConf = false\n\n[interop]\nenabled = false\nappendWindowsPath = false\n' > /etc/wsl.conf")
+if ($conf.Code -ne 0) { throw "写入 wsl.conf 失败: $($conf.Output)" }
+# 坑：首次导入的发行版内 /etc/resolv.conf 是 WSL 生成的 bind mount，直接 rm 会 EBUSY 失败
+# （旧脚本未检查返回码被静默吞掉，terminate 后 generateResolvConf=false 生效，
+# 不再自动生成 resolv.conf → 文件缺失 → DNS 完全失效）。必须先 umount 再重建真实文件。
+$resolv = Invoke-Wsl @('-d', $DistroName, '--', 'sh', '-c', "umount /etc/resolv.conf 2>/dev/null; rm -f /etc/resolv.conf; printf 'nameserver 223.5.5.5\nnameserver 119.29.29.29\n' > /etc/resolv.conf && cat /etc/resolv.conf")
+if ($resolv.Code -ne 0) { throw "写入 resolv.conf 失败: $($resolv.Output)" }
+$apkRepo = Invoke-Wsl @('-d', $DistroName, '--', 'sh', '-c', "printf '$ApkMirror/main\n$ApkMirror/community\n' > /etc/apk/repositories")
+if ($apkRepo.Code -ne 0) { throw "写入 apk 镜像源失败: $($apkRepo.Output)" }
 
 # 使 wsl.conf 生效
-$null = Invoke-Wsl --terminate $DistroName
+$null = Invoke-Wsl @('--terminate', $DistroName)
 Start-Sleep -Seconds 2
 
 Write-Host "==> [6/6] 安装沙箱工具链（bubblewrap / bash / python3 / git）"
-$apk = Invoke-Wsl -d $DistroName -- sh -c "apk update && apk add bubblewrap bash ncurses-libs python3 git"
+$apk = Invoke-Wsl @('-d', $DistroName, '--', 'sh', '-c', "apk update && apk add bubblewrap bash ncurses-libs python3 git")
 if ($apk.Code -ne 0) { throw "apk 安装失败: $($apk.Output)" }
 
 # 与 Windows 端 Git for Windows 默认的 core.autocrlf=true 对齐：
 # Windows 检出的工作区文件是 CRLF，沙箱 git 不开 autocrlf 会把全部文件误判为已修改
 # （全量 +/-），且全量内容读取+xdiff 会让 git 命令慢到触发执行超时。
-$null = Invoke-Wsl -d $DistroName -e git config --system core.autocrlf true
+$null = Invoke-Wsl @('-d', $DistroName, '-e', 'git', 'config', '--system', 'core.autocrlf', 'true')
 # 9P 挂载的 inode/ctime 语义与 Windows git 写入的索引不匹配，会导致沙箱 git 对全部
 # 文件做内容重读（全树 status/diff >20s）；放宽 stat 校验后只需秒级。
-$null = Invoke-Wsl -d $DistroName -e git config --system core.checkStat minimal
-$null = Invoke-Wsl -d $DistroName -e git config --system core.trustctime false
+$null = Invoke-Wsl @('-d', $DistroName, '-e', 'git', 'config', '--system', 'core.checkStat', 'minimal')
+$null = Invoke-Wsl @('-d', $DistroName, '-e', 'git', 'config', '--system', 'core.trustctime', 'false')
 
 # 验收
-$verify = Invoke-Wsl -d $DistroName -- sh -c "bwrap --version && bash -c 'echo bash-ok' && python3 --version && git --version"
+$verify = Invoke-Wsl @('-d', $DistroName, '--', 'sh', '-c', "bwrap --version && bash -c 'echo bash-ok' && python3 --version && git --version")
 Write-Host $verify.Output
-$escape = Invoke-Wsl -d $DistroName -- bwrap --die-with-parent --new-session --unshare-all --ro-bind / / --proc /proc --dev /dev -- bash -c "cmd.exe /c echo escape 2>&1 || echo interop-blocked"
+$escape = Invoke-Wsl @('-d', $DistroName, '--', 'bwrap', '--die-with-parent', '--new-session', '--unshare-all', '--ro-bind', '/', '/', '--proc', '/proc', '--dev', '/dev', '--', 'bash', '-c', "cmd.exe /c echo escape 2>&1 || echo interop-blocked")
 if ($escape.Output -match "interop-blocked|not found") {
     Write-Host "    interop 逃逸封堵验证: OK"
 } else {
diff --git a/scripts/start-sandbox-test-instance.cmd b/scripts/start-sandbox-test-instance.cmd
new file mode 100644
index 00000000..3e5e9c7c
--- /dev/null
+++ b/scripts/start-sandbox-test-instance.cmd
@@ -0,0 +1,38 @@
+@echo off
+rem start-sandbox-test-instance.cmd — 启动「沙箱安装向导」的隔离测试实例（Windows）
+rem
+rem 用途：验证「未安装沙箱时的居中弹窗 + 一键安装流程」。
+rem 本机 astrion-sandbox 已就绪时，正常实例不会弹窗；本脚本通过
+rem HOST_SANDBOX_WSL_DISTRO 指向一个不存在的测试发行版，使检测判定为缺失。
+rem
+rem 可选参数：
+rem   wsl-missing    额外模拟「WSL 未启用」分支：在 PATH 最前置入一个含同名
+rem                  0 字节假 wsl.exe 的目录（E:\astrion\sandbox-test-fake），
+rem                  which/Start-Process 优先命中它而失败，等效于挪走系统
+rem                  wsl.exe，但不碰系统文件，删目录即恢复。
+rem
+rem 隔离手段（主程序 8091/8092 完全不受影响）：
+rem   1. setlocal —— 环境变量仅存在于本脚本进程及其子进程，
+rem      脚本退出即失效，外部 cmd 窗口与其他服务实例读不到；
+rem   2. ASTRION_DATA_ROOT —— 数据目录独立（全新初始化，不动现有对话）；
+rem   3. --port 8093 —— 端口独立。
+rem
+rem 测试结束后清理：
+rem   wsl --unregister astrion-sandbox-test
+rem   rmdir /s /q E:\astrion\sandbox-test-data
+rem   rmdir /s /q E:\astrion\sandbox-test-fake
+rem   （若存在 %USERPROFILE%\.astrion\wsl-sandbox-astrion-sandbox-test 残留目录一并删除）
+
+setlocal
+set ASTRION_DATA_ROOT=E:\astrion\sandbox-test-data
+set HOST_SANDBOX_WSL_DISTRO=astrion-sandbox-test
+
+if /i "%~1"=="wsl-missing" (
+    if not exist E:\astrion\sandbox-test-fake mkdir E:\astrion\sandbox-test-fake
+    if not exist E:\astrion\sandbox-test-fake\wsl.exe type nul > E:\astrion\sandbox-test-fake\wsl.exe
+    set "PATH=E:\astrion\sandbox-test-fake;%PATH%"
+    echo [测试模式] 已模拟 wsl.exe 缺失：PATH 优先命中 0 字节假文件
+)
+
+python -m server.app --port 8093
+endlocal
diff --git a/server/status/__init__.py b/server/status/__init__.py
index 6abbdd8e..c2b2a325 100644
--- a/server/status/__init__.py
+++ b/server/status/__init__.py
@@ -9,3 +9,4 @@ from server.status.file_open import *
 from server.status.docker import *
 from server.status.host_workspace import *
 from server.status.app import *
+from server.status.sandbox import *
diff --git a/server/status/sandbox.py b/server/status/sandbox.py
new file mode 100644
index 00000000..2c0ba8ff
--- /dev/null
+++ b/server/status/sandbox.py
@@ -0,0 +1,58 @@
+# server/status/sandbox.py - Windows WSL 沙箱环境检测与一键安装 API
+#
+# - GET  /api/sandbox/status         分级检测沙箱状态（前端进页面自动调用）
+# - POST /api/sandbox/setup          启动一键安装（后台线程跑 setup-wsl-sandbox.ps1）
+# - GET  /api/sandbox/setup/status   轮询安装进度（阶段 / 步骤 / 日志 / 下载量）
+#
+# 仅 Windows + 宿主机模式（TERMINAL_SANDBOX_MODE=host 且会话 host_mode）适用；
+# 其它环境 applicable=false，前端不展示任何提示。
+# 安装进程由 server 直接在宿主机拉起（沙箱尚未建立的"鸡生蛋"场景，
+# 由用户在前端显式点击触发，不经 run_command 沙箱链路）。
+
+from __future__ import annotations
+
+from flask import jsonify, request, session
+
+from server.status import status_bp
+from server.auth_helpers import api_login_required
+from modules.sandbox_setup_manager import sandbox_setup_manager
+from modules.i18n import tr
+
+
+def _is_host_mode_request() -> bool:
+    try:
+        from config import TERMINAL_SANDBOX_MODE
+    except Exception:
+        return False
+    return bool(session.get("host_mode")) and (TERMINAL_SANDBOX_MODE or "").lower() == "host"
+
+
+@status_bp.route('/api/sandbox/status')
+@api_login_required
+def get_sandbox_status():
+    """分级检测沙箱状态。force=1 时绕过短缓存实测。"""
+    if not _is_host_mode_request():
+        return jsonify({"success": True, "data": {"applicable": False, "state": "not_applicable"}})
+    force = request.args.get("force") == "1"
+    data = sandbox_setup_manager.get_sandbox_status(force=force)
+    return jsonify({"success": True, "data": data})
+
+
+@status_bp.route('/api/sandbox/setup', methods=['POST'])
+@api_login_required
+def start_sandbox_setup():
+    """启动一键安装。body: {"enable_wsl_if_needed": bool}"""
+    if not _is_host_mode_request():
+        return jsonify({"success": False, "error": tr("sandbox.setup_not_host_mode")}), 400
+    payload = request.get_json(silent=True) or {}
+    result = sandbox_setup_manager.start_setup(bool(payload.get("enable_wsl_if_needed")))
+    if not result["started"]:
+        return jsonify({"success": False, "error": result["error"]}), 409
+    return jsonify({"success": True, "data": sandbox_setup_manager.get_setup_progress()})
+
+
+@status_bp.route('/api/sandbox/setup/status')
+@api_login_required
+def get_sandbox_setup_status():
+    """轮询安装进度。"""
+    return jsonify({"success": True, "data": sandbox_setup_manager.get_setup_progress()})
diff --git a/static/src/App.vue b/static/src/App.vue
index 437f0576..ad909257 100644
--- a/static/src/App.vue
+++ b/static/src/App.vue
@@ -554,6 +554,7 @@
         @submit="submitPlanApproval"
         @minimize="minimizePlanApprovalDialog"
       />
+      <SandboxSetupDialog />
       <transition name="overlay-fade">
         <VersioningDialog
           v-if="versioningDialogOpen"
diff --git a/static/src/app/components.ts b/static/src/app/components.ts
index 566fb6c7..2a23f018 100644
--- a/static/src/app/components.ts
+++ b/static/src/app/components.ts
@@ -33,6 +33,9 @@ const UserQuestionDialog = defineAsyncComponent(
 const PlanApprovalDialog = defineAsyncComponent(
   () => import('../components/overlay/PlanApprovalDialog.vue')
 );
+const SandboxSetupDialog = defineAsyncComponent(
+  () => import('../components/overlay/SandboxSetupDialog.vue')
+);
 const TutorialOverlay = defineAsyncComponent(
   () => import('../components/overlay/TutorialOverlay.vue')
 );
@@ -66,6 +69,7 @@ export const appComponents = {
   VersioningDialog,
   UserQuestionDialog,
   PlanApprovalDialog,
+  SandboxSetupDialog,
   TutorialOverlay,
   NewUserTutorialPrompt,
   GoalProgressDialog,
diff --git a/static/src/app/lifecycle.ts b/static/src/app/lifecycle.ts
index 447d8e4a..0e260caa 100644
--- a/static/src/app/lifecycle.ts
+++ b/static/src/app/lifecycle.ts
@@ -1,5 +1,6 @@
 // @ts-nocheck
 import { useChatActionStore } from '../stores/chatActions';
+import { useSandboxSetupStore } from '../stores/sandboxSetup';
 import { normalizeScrollLock } from '../composables/useScrollControl';
 import { setupShowImageObserver, teardownShowImageObserver } from './bootstrap';
 import { debugLog } from './methods/common';
@@ -48,6 +49,8 @@ export async function mounted() {
   this.fetchTerminalCount();
   this.startTerminalCountIdleRefresh();
   this.checkTutorialPrompt();
+  // Windows 宿主机模式下检测沙箱环境，缺失时弹出居中的安装向导（不分 sandbox/direct 执行环境）
+  void useSandboxSetupStore().autoCheck();
   if (initialDataPromise && typeof initialDataPromise.then === 'function') {
     initialDataPromise
       .then(() => {
diff --git a/static/src/components/overlay/SandboxSetupDialog.vue b/static/src/components/overlay/SandboxSetupDialog.vue
new file mode 100644
index 00000000..4932acf6
--- /dev/null
+++ b/static/src/components/overlay/SandboxSetupDialog.vue
@@ -0,0 +1,613 @@
+<template>
+  <transition name="sandbox-setup-fade" appear>
+    <div v-if="store.dialogVisible" class="sandbox-setup-overlay">
+      <section
+        class="sandbox-setup-card"
+        role="dialog"
+        aria-modal="true"
+        :aria-label="$t('sandbox.setupAriaLabel')"
+      >
+        <header class="sandbox-setup-windowbar">
+          <div class="sandbox-setup-window-title">{{ $t('sandbox.setupTitle') }}</div>
+          <button
+            type="button"
+            class="sandbox-setup-close"
+            :title="$t('common.close')"
+            :aria-label="$t('common.close')"
+            @click="onClose"
+          >
+            <svg viewBox="0 0 20 20" width="14" height="14" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+              <path d="M5 5l10 10M15 5L5 15" />
+            </svg>
+          </button>
+        </header>
+
+        <div class="sandbox-setup-body">
+          <!-- ── 未开始：说明 + 状态描述 ── -->
+          <template v-if="!progress">
+            <div class="sandbox-setup-hero">
+              <svg viewBox="0 0 24 24" width="34" height="34" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+                <path d="M12 3l7 3v5c0 4.5-3 8.5-7 10-4-1.5-7-5.5-7-10V6l7-3z" />
+                <path d="M9 12l2 2 4-4" />
+              </svg>
+            </div>
+            <p v-if="stateDescription" class="sandbox-setup-state-desc">{{ stateDescription }}</p>
+            <p v-else class="sandbox-setup-state-desc">{{ $t('sandbox.stateChecking') }}</p>
+            <ul class="sandbox-setup-facts">
+              <li>{{ $t('sandbox.introWhat') }}</li>
+              <li>{{ $t('sandbox.introEffect') }}</li>
+              <li>{{ $t('sandbox.introDisk', { path: installPathHint }) }}</li>
+              <li>{{ $t('sandbox.introUninstall', { distro: distroName }) }}</li>
+              <li>{{ $t('sandbox.introSecure') }}</li>
+            </ul>
+          </template>
+
+          <!-- ── 安装中 / 终态：阶段 + 步骤进度 ── -->
+          <template v-else>
+            <div v-if="phaseLineText" class="sandbox-setup-phase-line">
+              <span class="sandbox-setup-spinner" aria-hidden="true"></span>
+              {{ phaseLineText }}
+            </div>
+
+            <ul class="sandbox-setup-steps">
+              <li
+                v-for="(step, i) in steps"
+                :key="i"
+                class="sandbox-setup-step"
+                :class="stepStatus(i + 1)"
+              >
+                <span class="sandbox-setup-step-icon" aria-hidden="true">
+                  <svg v-if="stepStatus(i + 1) === 'done'" viewBox="0 0 20 20" width="13" height="13" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round">
+                    <path d="M4 10.5l4 4 8-9" />
+                  </svg>
+                  <span v-else-if="stepStatus(i + 1) === 'active'" class="sandbox-setup-spinner small"></span>
+                  <svg v-else-if="stepStatus(i + 1) === 'error'" viewBox="0 0 20 20" width="13" height="13" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round">
+                    <path d="M5 5l10 10M15 5L5 15" />
+                  </svg>
+                  <span v-else class="sandbox-setup-step-dot"></span>
+                </span>
+                <span class="sandbox-setup-step-title">{{ step }}</span>
+                <span v-if="i + 1 === 3 && progress.step_index === 3 && downloadText" class="sandbox-setup-step-extra">
+                  {{ downloadText }}
+                </span>
+              </li>
+            </ul>
+
+            <div class="sandbox-setup-progress">
+              <div class="sandbox-setup-progress-fill" :style="{ width: progressPercent + '%' }"></div>
+            </div>
+
+            <div v-if="progress.phase === 'done'" class="sandbox-setup-result ok">
+              {{ $t('sandbox.phaseDone') }}
+            </div>
+            <div v-else-if="progress.phase === 'needs_reboot'" class="sandbox-setup-result warn">
+              {{ $t('sandbox.phaseNeedsReboot') }}
+            </div>
+            <div v-else-if="progress.phase === 'error'" class="sandbox-setup-result error">
+              <p class="sandbox-setup-error-line">{{ progress.error || $t('sandbox.phaseError') }}</p>
+              <p v-if="progress.error_kind === 'uac_cancelled'" class="sandbox-setup-error-hint">
+                {{ $t('sandbox.uacCancelledHint') }}
+              </p>
+            </div>
+
+            <div v-if="progress.log_tail.length" class="sandbox-setup-log-block">
+              <div class="sandbox-setup-log-label">{{ $t('sandbox.logLabel') }}</div>
+              <pre ref="logEl" class="sandbox-setup-log">{{ progress.log_tail.join('\n') }}</pre>
+            </div>
+          </template>
+        </div>
+
+        <footer v-if="!progress || !progress.active" class="sandbox-setup-footer">
+          <!-- 未开始 -->
+          <template v-if="!progress">
+            <label class="sandbox-setup-never">
+              <input type="checkbox" :checked="neverChecked" @change="neverChecked = ($event.target as HTMLInputElement).checked" />
+              <FancyCheck :checked="neverChecked" :size="16" />
+              <span>{{ $t('sandbox.neverAgain') }}</span>
+            </label>
+            <div class="sandbox-setup-spacer"></div>
+            <button type="button" class="sandbox-setup-btn ghost" @click="onClose">
+              {{ $t('sandbox.later') }}
+            </button>
+            <button
+              type="button"
+              class="sandbox-setup-btn primary"
+              :disabled="store.starting || store.checking || !store.status"
+              @click="store.startSetup()"
+            >
+              {{ store.starting ? $t('common.loading') : $t('sandbox.installNow') }}
+            </button>
+          </template>
+          <!-- 终态 -->
+          <template v-else>
+            <div class="sandbox-setup-spacer"></div>
+            <button
+              v-if="progress.phase === 'error' || progress.phase === 'needs_reboot'"
+              type="button"
+              class="sandbox-setup-btn primary"
+              :disabled="store.starting"
+              @click="store.retrySetup()"
+            >
+              {{ progress.phase === 'needs_reboot' ? $t('sandbox.rebootDone') : $t('common.retry') }}
+            </button>
+            <button type="button" class="sandbox-setup-btn ghost" @click="onClose">
+              {{ $t('common.close') }}
+            </button>
+          </template>
+        </footer>
+      </section>
+    </div>
+  </transition>
+</template>
+
+<script setup lang="ts">
+import { computed, nextTick, ref, watch } from 'vue';
+import { useI18n } from 'vue-i18n';
+import FancyCheck from '@/components/common/FancyCheck.vue';
+import { useSandboxSetupStore } from '@/stores/sandboxSetup';
+
+defineOptions({ name: 'SandboxSetupDialog' });
+
+const { t } = useI18n();
+const store = useSandboxSetupStore();
+
+const neverChecked = ref(false);
+const logEl = ref<HTMLElement | null>(null);
+
+// 安装日志常显且自动滚动到底部（新行到达时）
+watch(
+  () => store.progress?.log_tail.length,
+  async () => {
+    await nextTick();
+    if (logEl.value) logEl.value.scrollTop = logEl.value.scrollHeight;
+  }
+);
+
+const progress = computed(() => store.progress);
+const distroName = computed(() => store.status?.distro_name || 'astrion-sandbox');
+// 安装目录与 scripts/setup-wsl-sandbox.ps1 的默认 InstallDir 保持一致
+const installPathHint = computed(() => '%USERPROFILE%\\.astrion\\wsl-sandbox');
+
+const stateDescription = computed(() => {
+  const s = store.status;
+  if (!s || !s.applicable) return '';
+  if (s.state === 'wsl_missing') return t('sandbox.stateWslMissing');
+  if (s.state === 'distro_missing') return t('sandbox.stateDistroMissing');
+  if (s.state === 'bwrap_missing') return t('sandbox.stateBwrapMissing');
+  return '';
+});
+
+const steps = computed(() => [
+  t('sandbox.stepCheckWsl'),
+  t('sandbox.stepCheckDistro'),
+  t('sandbox.stepDownloadRootfs'),
+  t('sandbox.stepImportDistro'),
+  t('sandbox.stepWriteConfig'),
+  t('sandbox.stepInstallTools')
+]);
+
+function stepStatus(step1Based: number): 'pending' | 'active' | 'done' | 'error' {
+  const p = progress.value;
+  if (!p) return 'pending';
+  if (p.phase === 'verifying' || p.phase === 'done') return 'done';
+  if (p.phase === 'enabling_wsl' || p.step_index === 0) return 'pending';
+  if (step1Based < p.step_index) return 'done';
+  if (step1Based === p.step_index) return p.phase === 'error' ? 'error' : 'active';
+  return 'pending';
+}
+
+const downloadFraction = computed(() => {
+  const p = progress.value;
+  if (!p || p.step_index !== 3 || !p.download_bytes || !p.download_total) return 0;
+  return Math.min(1, p.download_bytes / p.download_total);
+});
+
+const progressPercent = computed(() => {
+  const p = progress.value;
+  if (!p) return 0;
+  switch (p.phase) {
+    case 'enabling_wsl':
+      return 4;
+    case 'installing_wsl':
+      return 6;
+    case 'installing': {
+      const total = p.step_total || 6;
+      const doneSteps = Math.max(0, p.step_index - 1);
+      return Math.min(96, Math.round(((doneSteps + downloadFraction.value) / total) * 100));
+    }
+    case 'verifying':
+      return 96;
+    case 'done':
+      return 100;
+    case 'needs_reboot':
+      return 8;
+    case 'error': {
+      const total = p.step_total || 6;
+      return Math.round((Math.max(0, p.step_index - 1) / total) * 100);
+    }
+    default:
+      return 0;
+  }
+});
+
+const phaseLineText = computed(() => {
+  const p = progress.value;
+  if (!p) return '';
+  if (p.phase === 'enabling_wsl') return t('sandbox.phaseEnablingWsl');
+  if (p.phase === 'installing_wsl') return t('sandbox.phaseInstallingWsl');
+  if (p.phase === 'verifying') return t('sandbox.phaseVerifying');
+  return '';
+});
+
+function formatMB(bytes: number): string {
+  return `${(bytes / 1024 / 1024).toFixed(1)} MB`;
+}
+
+const downloadText = computed(() => {
+  const p = progress.value;
+  if (!p || !p.download_bytes) return '';
+  if (p.download_total) {
+    return t('sandbox.downloadProgress', {
+      size: `${formatMB(p.download_bytes)} / ${formatMB(p.download_total)}`
+    });
+  }
+  return t('sandbox.downloadProgress', { size: formatMB(p.download_bytes) });
+});
+
+function onClose() {
+  // 安装中关闭仅收起弹窗（安装继续在后台进行，可从个人空间重新打开）
+  if (store.progress?.active) {
+    store.dialogVisible = false;
+    return;
+  }
+  store.closeDialog(neverChecked.value);
+}
+</script>
+
+<style scoped>
+.sandbox-setup-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 1400;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 20px;
+  background: var(--overlay-scrim);
+}
+
+.sandbox-setup-card {
+  position: relative;
+  width: min(560px, calc(100vw - 36px));
+  max-height: min(720px, calc(100vh - 36px));
+  max-height: min(720px, calc(100dvh - 36px));
+  display: flex;
+  flex-direction: column;
+  color: var(--text-primary);
+  background: var(--surface-card);
+  border: 1px solid var(--border-strong);
+  border-radius: 16px;
+  overflow: hidden;
+}
+
+.sandbox-setup-windowbar {
+  position: relative;
+  height: 40px;
+  flex: 0 0 40px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-bottom: 1px solid var(--border-default);
+}
+
+.sandbox-setup-window-title {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--text-secondary);
+  user-select: none;
+}
+
+.sandbox-setup-close {
+  position: absolute;
+  right: 10px;
+  top: 50%;
+  transform: translateY(-50%);
+  width: 26px;
+  height: 26px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+  border: none;
+  border-radius: 7px;
+  background: transparent;
+  color: var(--text-secondary);
+  cursor: pointer;
+}
+
+.sandbox-setup-close:hover {
+  background: var(--hover-bg);
+  color: var(--text-primary);
+}
+
+.sandbox-setup-body {
+  flex: 1 1 auto;
+  min-height: 0;
+  overflow-y: auto;
+  padding: 20px 24px 8px;
+  scrollbar-width: thin;
+}
+
+.sandbox-setup-hero {
+  display: flex;
+  justify-content: center;
+  color: var(--accent);
+  margin-bottom: 12px;
+}
+
+.sandbox-setup-state-desc {
+  margin: 0 0 12px;
+  font-size: 13.5px;
+  font-weight: 600;
+  line-height: 1.6;
+  color: var(--text-primary);
+}
+
+.sandbox-setup-facts {
+  margin: 0;
+  padding: 0 0 0 18px;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.sandbox-setup-facts li {
+  font-size: 12.5px;
+  line-height: 1.6;
+  color: var(--text-secondary);
+}
+
+.sandbox-setup-phase-line {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  height: 30px;
+  margin-bottom: 10px;
+  font-size: 12.5px;
+  font-weight: 600;
+  color: var(--text-secondary);
+}
+
+.sandbox-setup-steps {
+  list-style: none;
+  margin: 0 0 14px;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.sandbox-setup-step {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  height: 30px;
+  font-size: 13px;
+  color: var(--text-tertiary);
+}
+
+.sandbox-setup-step.active {
+  color: var(--text-primary);
+  font-weight: 600;
+}
+
+.sandbox-setup-step.done {
+  color: var(--text-secondary);
+}
+
+.sandbox-setup-step.error {
+  color: var(--state-danger);
+  font-weight: 600;
+}
+
+.sandbox-setup-step-icon {
+  width: 18px;
+  height: 18px;
+  flex: 0 0 18px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.sandbox-setup-step.done .sandbox-setup-step-icon {
+  color: var(--state-success);
+}
+
+.sandbox-setup-step-dot {
+  width: 5px;
+  height: 5px;
+  border-radius: 50%;
+  background: var(--border-strong);
+}
+
+.sandbox-setup-step-extra {
+  margin-left: auto;
+  font-size: 11.5px;
+  font-weight: 400;
+  color: var(--text-secondary);
+  font-variant-numeric: tabular-nums;
+}
+
+.sandbox-setup-spinner {
+  width: 14px;
+  height: 14px;
+  border-radius: 50%;
+  border: 2px solid var(--border-default);
+  border-top-color: var(--accent);
+  animation: sandbox-setup-spin 0.9s linear infinite;
+}
+
+.sandbox-setup-spinner.small {
+  width: 11px;
+  height: 11px;
+  border-width: 1.6px;
+}
+
+@keyframes sandbox-setup-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+.sandbox-setup-progress {
+  height: 6px;
+  border-radius: 3px;
+  background: var(--surface-muted);
+  overflow: hidden;
+  margin-bottom: 14px;
+}
+
+.sandbox-setup-progress-fill {
+  height: 100%;
+  border-radius: 3px;
+  background: var(--accent);
+  transition: width 0.4s ease;
+}
+
+.sandbox-setup-result {
+  border-radius: 10px;
+  padding: 10px 12px;
+  font-size: 12.5px;
+  line-height: 1.6;
+  margin-bottom: 12px;
+}
+
+.sandbox-setup-result.ok {
+  background: color-mix(in srgb, var(--state-success) 12%, transparent);
+  color: var(--text-primary);
+}
+
+.sandbox-setup-result.warn {
+  background: color-mix(in srgb, var(--state-warning) 14%, transparent);
+  color: var(--text-primary);
+}
+
+.sandbox-setup-result.error {
+  background: color-mix(in srgb, var(--state-danger) 12%, transparent);
+  color: var(--text-primary);
+}
+
+.sandbox-setup-error-line {
+  margin: 0;
+  font-weight: 600;
+}
+
+.sandbox-setup-error-hint {
+  margin: 6px 0 0;
+  color: var(--text-secondary);
+}
+
+.sandbox-setup-log-block {
+  margin-bottom: 12px;
+}
+
+.sandbox-setup-log-label {
+  height: 22px;
+  line-height: 22px;
+  font-size: 12px;
+  color: var(--text-tertiary);
+  user-select: none;
+}
+
+.sandbox-setup-log {
+  margin: 2px 0 0;
+  max-height: 160px;
+  overflow-y: auto;
+  padding: 10px 12px;
+  border-radius: 8px;
+  background: var(--surface-muted);
+  font-size: 11.5px;
+  line-height: 1.55;
+  color: var(--text-secondary);
+  white-space: pre-wrap;
+  word-break: break-all;
+  scrollbar-width: thin;
+}
+
+.sandbox-setup-footer {
+  flex: 0 0 auto;
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 12px 24px 16px;
+  border-top: 1px solid var(--border-default);
+}
+
+.sandbox-setup-never {
+  display: flex;
+  align-items: center;
+  gap: 7px;
+  height: 30px;
+  font-size: 12.5px;
+  color: var(--text-secondary);
+  cursor: pointer;
+  user-select: none;
+}
+
+.sandbox-setup-never input {
+  position: absolute;
+  opacity: 0;
+  pointer-events: none;
+}
+
+.sandbox-setup-spacer {
+  flex: 1 1 auto;
+}
+
+
+.sandbox-setup-btn {
+  height: 32px;
+  padding: 0 16px;
+  border-radius: 8px;
+  font-size: 13px;
+  font-weight: 600;
+  cursor: pointer;
+  border: 1px solid transparent;
+  white-space: nowrap;
+}
+
+.sandbox-setup-btn:disabled {
+  opacity: 0.55;
+  cursor: default;
+}
+
+.sandbox-setup-btn.ghost {
+  background: transparent;
+  border-color: var(--border-default);
+  color: var(--text-secondary);
+}
+
+.sandbox-setup-btn.ghost:hover:not(:disabled) {
+  background: var(--hover-bg);
+  color: var(--text-primary);
+}
+
+.sandbox-setup-btn.primary {
+  background: var(--accent);
+  color: var(--on-accent);
+}
+
+.sandbox-setup-btn.primary:hover:not(:disabled) {
+  background: var(--accent-hover);
+}
+
+.sandbox-setup-fade-enter-active,
+.sandbox-setup-fade-leave-active {
+  transition: opacity 0.18s ease;
+}
+
+.sandbox-setup-fade-enter-from,
+.sandbox-setup-fade-leave-to {
+  opacity: 0;
+}
+</style>
diff --git a/static/src/components/personalization/tabs/GeneralTab.vue b/static/src/components/personalization/tabs/GeneralTab.vue
index 494bd728..d58858ef 100644
--- a/static/src/components/personalization/tabs/GeneralTab.vue
+++ b/static/src/components/personalization/tabs/GeneralTab.vue
@@ -1,9 +1,31 @@
 <script setup lang="ts">
-import { inject } from 'vue';
+import { computed, inject, onMounted } from 'vue';
+import { useI18n } from 'vue-i18n';
 import FancyCheck from '@/components/common/FancyCheck.vue';
+import { useSandboxSetupStore } from '@/stores/sandboxSetup';
 
 defineOptions({ name: 'GeneralTab' });
 
+const { t } = useI18n();
+const sandboxSetup = useSandboxSetupStore();
+
+// 沙箱环境区块：进入通用页时补一次检测（复用 store 内部防抖）
+onMounted(() => {
+  if (!sandboxSetup.status) void sandboxSetup.fetchStatus();
+});
+
+const sandboxStatusText = computed(() => {
+  const s = sandboxSetup.status;
+  if (!s || sandboxSetup.checking) return t('sandbox.sectionChecking');
+  if (!s.applicable) return t('sandbox.sectionUnavailable');
+  return s.state === 'ready' ? t('sandbox.sectionReady') : t('sandbox.sectionMissing');
+});
+
+const sandboxShowWizard = computed(() => {
+  const s = sandboxSetup.status;
+  return !!s && s.applicable && s.state !== 'ready';
+});
+
 /**
  * 共享上下文由 PersonalizationDrawer.vue 通过 provide 注入。
  * 解构出的名称与主文件 script 顶层绑定一致，模板可直接引用。
@@ -84,6 +106,44 @@ const {
         </button>
       </div>
     </div>
+    <div class="settings-action-row sandbox-env-row">
+      <span class="settings-row-copy">
+        <span class="settings-row-title">{{ $t('sandbox.sectionTitle') }}</span>
+        <span class="settings-row-desc">{{ $t('sandbox.sectionDesc') }}</span>
+      </span>
+      <div class="settings-inline-actions">
+        <span class="settings-mini-status" :class="{ warning: sandboxShowWizard }">{{
+          sandboxStatusText
+        }}</span>
+        <span v-if="sandboxSetup.neverAsk" class="settings-mini-status">{{
+          $t('sandbox.neverAgainSet')
+        }}</span>
+        <button
+          v-if="sandboxSetup.neverAsk"
+          type="button"
+          class="settings-secondary-button"
+          @click="sandboxSetup.resetNeverAsk()"
+        >
+          {{ $t('sandbox.resetNeverAgain') }}
+        </button>
+        <button
+          type="button"
+          class="settings-secondary-button"
+          :disabled="sandboxSetup.checking"
+          @click="sandboxSetup.recheck()"
+        >
+          {{ sandboxSetup.checking ? $t('common.refreshing') : $t('sandbox.recheck') }}
+        </button>
+        <button
+          v-if="sandboxShowWizard"
+          type="button"
+          class="settings-primary-button"
+          @click="sandboxSetup.openWizard()"
+        >
+          {{ $t('sandbox.openWizard') }}
+        </button>
+      </div>
+    </div>
     <div class="settings-action-row danger-zone">
       <span class="settings-row-copy">
         <span class="settings-row-title">{{ $t('personalization.logoutTitle') }}</span>
@@ -99,3 +159,16 @@ const {
     </div>
   </section>
 </template>
+
+<style scoped>
+/* 沙箱环境区块：上下结构（标题描述在上，状态徽标与按钮组整行在下），
+   避免默认左右结构中右侧按钮组挤压左侧文案空间 */
+.sandbox-env-row {
+  grid-template-columns: minmax(0, 1fr);
+  gap: 10px;
+}
+
+.sandbox-env-row .settings-inline-actions {
+  justify-content: flex-start;
+}
+</style>
diff --git a/static/src/locales/en-US.ts b/static/src/locales/en-US.ts
index 52fcdce8..bdeebf43 100644
--- a/static/src/locales/en-US.ts
+++ b/static/src/locales/en-US.ts
@@ -25,6 +25,7 @@ import shell from './en-US/shell';
 import sidebar from './en-US/sidebar';
 import auth from './en-US/auth';
 import utils from './en-US/utils';
+import sandbox from './en-US/sandbox';
 
 type DeepString<T> = { [K in keyof T]: T[K] extends string ? string : DeepString<T[K]> };
 
@@ -53,6 +54,7 @@ const enUS: DeepString<typeof zhCN> = {
   sidebar,
   auth,
   utils,
+  sandbox,
 };
 
 export default enUS;
diff --git a/static/src/locales/en-US/sandbox.ts b/static/src/locales/en-US/sandbox.ts
new file mode 100644
index 00000000..579ec488
--- /dev/null
+++ b/static/src/locales/en-US/sandbox.ts
@@ -0,0 +1,55 @@
+// Locale namespace: sandbox (en-US)
+// Keys must exactly mirror zh-CN/sandbox.ts (enforced by tsc DeepString).
+export default {
+  // ── Dialog frame ──
+  setupTitle: 'Set Up Sandbox Environment',
+  setupAriaLabel: 'Sandbox environment setup wizard',
+
+  // ── Intro ──
+  introWhat: 'The sandbox is an isolated command execution environment (based on WSL2). All terminal commands run by the AI execute inside the sandbox, isolated from your system.',
+  introEffect: 'Without the sandbox, commands that require isolation cannot run and tool calls will fail with errors.',
+  introDisk: 'An Alpine mini system (~3MB) will be downloaded and installed to {path} (~100-300MB total with toolchain).',
+  introUninstall: 'You can fully uninstall anytime with: wsl --unregister {distro}.',
+  introSecure: 'A dedicated sandbox distro is installed (Windows interop disabled); a daily distro like Ubuntu cannot be used instead.',
+
+  // ── Detection states ──
+  stateWslMissing: 'WSL2 is not enabled on this system. Setup will first enable WSL2 (a system administrator prompt will appear, and a reboot may be required afterwards).',
+  stateDistroMissing: 'WSL2 is ready, but the dedicated sandbox distro is not installed yet. Click install to finish automatically.',
+  stateBwrapMissing: 'The sandbox distro exists, but the bubblewrap component is missing. Click install to repair automatically.',
+  stateChecking: 'Checking sandbox environment...',
+
+  // ── Phases and steps ──
+  phaseEnablingWsl: 'Requesting administrator approval to enable WSL2 (please confirm in the system prompt)...',
+  phaseInstallingWsl: 'Downloading and installing WSL2 components; this may take a few minutes...',
+  phaseVerifying: 'Verifying installation...',
+  phaseDone: 'Setup complete. The sandbox environment is ready.',
+  phaseNeedsReboot: 'WSL2 has been enabled, but a reboot is required to continue. Please reboot and reopen this wizard to finish setup.',
+  phaseError: 'Setup failed',
+  stepCheckWsl: 'Check WSL environment',
+  stepCheckDistro: 'Check distro',
+  stepDownloadRootfs: 'Download Alpine system',
+  stepImportDistro: 'Import WSL2 distro',
+  stepWriteConfig: 'Write sandbox configuration',
+  stepInstallTools: 'Install sandbox toolchain',
+  downloadProgress: 'Downloaded {size}',
+  logLabel: 'Setup log',
+
+  // ── Buttons and options ──
+  installNow: 'Install Now',
+  later: 'Not Now',
+  neverAgain: "Don't ask again",
+  rebootDone: 'I have rebooted, continue setup',
+  uacCancelledHint: 'Administrator approval was cancelled. Enabling WSL2 requires administrator permission; please retry and choose "Yes" in the system prompt.',
+
+  // ── Personalization → General: sandbox section ──
+  sectionTitle: 'Sandbox Environment',
+  sectionReady: 'Ready',
+  sectionMissing: 'Not installed',
+  sectionChecking: 'Checking...',
+  sectionUnavailable: 'Not applicable in this environment',
+  sectionDesc: 'In Windows host mode, commands run isolated inside a WSL2-based sandbox.',
+  openWizard: 'Open Setup Wizard',
+  recheck: 'Re-check',
+  neverAgainSet: '"Don\'t ask again" is on',
+  resetNeverAgain: 'Re-enable prompts',
+};
diff --git a/static/src/locales/zh-CN.ts b/static/src/locales/zh-CN.ts
index cb27be30..d2a03a70 100644
--- a/static/src/locales/zh-CN.ts
+++ b/static/src/locales/zh-CN.ts
@@ -24,6 +24,7 @@ import shell from './zh-CN/shell';
 import sidebar from './zh-CN/sidebar';
 import auth from './zh-CN/auth';
 import utils from './zh-CN/utils';
+import sandbox from './zh-CN/sandbox';
 
 export default {
   common,
@@ -50,4 +51,5 @@ export default {
   sidebar,
   auth,
   utils,
+  sandbox,
 } as const;
diff --git a/static/src/locales/zh-CN/sandbox.ts b/static/src/locales/zh-CN/sandbox.ts
new file mode 100644
index 00000000..6f9f42d2
--- /dev/null
+++ b/static/src/locales/zh-CN/sandbox.ts
@@ -0,0 +1,58 @@
+// 文案命名空间：sandbox（zh-CN 源语言）
+// 沙箱环境检测与一键安装向导（Windows 宿主机模式）。
+// 使用方：static/src/components/overlay/SandboxSetupDialog.vue
+//        static/src/components/personalization/tabs/GeneralTab.vue
+//        static/src/stores/sandboxSetup.ts
+export default {
+  // ── 弹窗框架 ──
+  setupTitle: '安装沙箱环境',
+  setupAriaLabel: '沙箱环境安装向导',
+
+  // ── 说明区 ──
+  introWhat: '沙箱是一个隔离的命令执行环境（基于 WSL2）。AI 执行的所有终端命令都在沙箱内运行，与您的系统隔离。',
+  introEffect: '未安装沙箱时，需要隔离执行的命令将无法运行，工具调用会直接报错。',
+  introDisk: '将下载约 3MB 的 Alpine 迷你系统并安装到 {path}（含工具链总占用约 100~300MB）。',
+  introUninstall: '可随时通过命令 wsl --unregister {distro} 完全卸载。',
+  introSecure: '安装的是专用沙箱发行版（已关闭 Windows 互操作），不能使用已安装的 Ubuntu 等日常发行版代替。',
+
+  // ── 状态描述（检测分级） ──
+  stateWslMissing: '检测到系统尚未启用 WSL2。安装过程需要先启用 WSL2（系统将弹出管理员授权，授权后可能需要重启电脑）。',
+  stateDistroMissing: '检测到 WSL2 已就绪，但尚未安装沙箱专用发行版。点击安装即可自动完成。',
+  stateBwrapMissing: '检测到沙箱发行版存在，但缺少 bubblewrap 组件。点击安装将自动修复。',
+  stateChecking: '正在检测沙箱环境…',
+
+  // ── 阶段与步骤 ──
+  phaseEnablingWsl: '正在请求管理员授权以启用 WSL2（请在系统弹窗中确认）…',
+  phaseInstallingWsl: '正在下载并安装 WSL2 组件，可能需要几分钟…',
+  phaseVerifying: '正在验收安装结果…',
+  phaseDone: '安装完成，沙箱环境已就绪。',
+  phaseNeedsReboot: 'WSL2 已启用，但需要重启电脑后才能继续。请重启后重新打开本向导完成安装。',
+  phaseError: '安装失败',
+  stepCheckWsl: '检查 WSL 环境',
+  stepCheckDistro: '检查发行版',
+  stepDownloadRootfs: '下载 Alpine 系统',
+  stepImportDistro: '导入 WSL2 发行版',
+  stepWriteConfig: '写入沙箱配置',
+  stepInstallTools: '安装沙箱工具链',
+  downloadProgress: '已下载 {size}',
+  logLabel: '安装日志',
+
+  // ── 按钮与选项 ──
+  installNow: '立即安装',
+  later: '暂不安装',
+  neverAgain: '不再提示',
+  rebootDone: '我已重启，继续安装',
+  uacCancelledHint: '已取消管理员授权。启用 WSL2 需要管理员权限，请点击重试并在系统弹窗中选择"是"。',
+
+  // ── 个人空间 → 通用：沙箱环境区块 ──
+  sectionTitle: '沙箱环境',
+  sectionReady: '已就绪',
+  sectionMissing: '未安装',
+  sectionChecking: '检测中…',
+  sectionUnavailable: '当前环境不适用',
+  sectionDesc: 'Windows 宿主机模式下，命令在基于 WSL2 的沙箱中隔离执行。',
+  openWizard: '打开安装向导',
+  recheck: '重新检测',
+  neverAgainSet: '已选择"不再提示"',
+  resetNeverAgain: '恢复提示',
+};
diff --git a/static/src/stores/sandboxSetup.ts b/static/src/stores/sandboxSetup.ts
new file mode 100644
index 00000000..6dae0ec7
--- /dev/null
+++ b/static/src/stores/sandboxSetup.ts
@@ -0,0 +1,289 @@
+// static/src/stores/sandboxSetup.ts - 沙箱环境检测与一键安装向导状态
+//
+// 职责：
+// - 进页面自动检测（Windows 宿主机模式且沙箱未就绪时弹出安装向导，不分 sandbox/direct 执行环境）
+// - 「暂不安装」= 12 小时内不再弹（sessionStorage 时间戳）；「不再提示」= 持久关闭（localStorage）
+// - 安装任务进度轮询（1s），完成后刷新检测状态
+//
+// 使用方：app/lifecycle.ts（自动检测）、overlay/SandboxSetupDialog.vue（弹窗）、
+//        personalization/tabs/GeneralTab.vue（沙箱环境区块）
+import { defineStore } from 'pinia';
+
+const NEVER_KEY = 'agents_sandbox_setup_never';
+const SNOOZE_KEY = 'agents_sandbox_setup_snoozed';
+const POLL_INTERVAL_MS = 1000;
+/** 「暂不安装」免打扰窗口：12 小时。
+ *  承诺语义是「本次会话不再弹、下次进页面仍提示」，但 sessionStorage 生命周期
+ *  是标签页会话——标签页长期不关会永久拦截弹窗（实测踩坑：用户卸载 WSL 重测时
+ *  被数小时前点的「暂不安装」挡住）。时间戳窗口是对该语义的诚实实现；
+ *  旧值 '1' 会被解析为 1970 年时间戳而必然过期，旧拦截自动失效。 */
+const SNOOZE_WINDOW_MS = 12 * 60 * 60 * 1000;
+
+function readSnoozed(): boolean {
+  try {
+    const raw = sessionStorage.getItem(SNOOZE_KEY);
+    if (!raw) return false;
+    const at = Number(raw);
+    if (!Number.isFinite(at) || Date.now() - at > SNOOZE_WINDOW_MS) {
+      sessionStorage.removeItem(SNOOZE_KEY);
+      return false;
+    }
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+export type SandboxState =
+  | 'ready'
+  | 'wsl_missing'
+  | 'distro_missing'
+  | 'bwrap_missing'
+  | 'not_applicable'
+  | 'error';
+
+export interface SandboxStatus {
+  applicable: boolean;
+  platform: string;
+  state: SandboxState;
+  distro_name: string;
+  detail: string;
+  setup_running: boolean;
+}
+
+export type SetupPhase =
+  | 'idle'
+  | 'enabling_wsl'
+  | 'installing_wsl'
+  | 'installing'
+  | 'verifying'
+  | 'done'
+  | 'needs_reboot'
+  | 'error';
+
+export interface SetupProgress {
+  active: boolean;
+  phase: SetupPhase;
+  step_index: number;
+  step_total: number;
+  step_title: string;
+  log_tail: string[];
+  download_bytes: number | null;
+  download_total: number | null;
+  error: string | null;
+  error_kind: string | null;
+  updated_at: number;
+}
+
+interface SandboxSetupState {
+  status: SandboxStatus | null;
+  checking: boolean;
+  dialogVisible: boolean;
+  progress: SetupProgress | null;
+  starting: boolean;
+  snoozed: boolean;
+  pollTimer: ReturnType<typeof setInterval> | null;
+}
+
+export const useSandboxSetupStore = defineStore('sandboxSetup', {
+  state: (): SandboxSetupState => ({
+    status: null,
+    checking: false,
+    dialogVisible: false,
+    progress: null,
+    starting: false,
+    snoozed: readSnoozed(),
+    pollTimer: null
+  }),
+
+  getters: {
+    neverAsk(): boolean {
+      try {
+        return localStorage.getItem(NEVER_KEY) === '1';
+      } catch {
+        return false;
+      }
+    },
+    /** 沙箱未就绪（仅统计 applicable 且非 ready 的三种缺失状态） */
+    missing(): boolean {
+      const s = this.status;
+      if (!s || !s.applicable) return false;
+      return s.state === 'wsl_missing' || s.state === 'distro_missing' || s.state === 'bwrap_missing';
+    },
+    /** 进页面是否应自动弹出向导 */
+    shouldAutoPrompt(): boolean {
+      if (this.dialogVisible || this.snoozed || this.neverAsk) return false;
+      if (this.progress?.active) return true; // 刷新页面时安装仍在进行，恢复弹窗
+      return this.missing;
+    },
+    /** 安装是否处于终态（done/needs_reboot/error） */
+    setupFinished(): boolean {
+      const p = this.progress;
+      return !!p && !p.active && p.phase !== 'idle';
+    }
+  },
+
+  actions: {
+    async fetchStatus(force = false): Promise<void> {
+      if (this.checking) return;
+      this.checking = true;
+      try {
+        const resp = await fetch(`/api/sandbox/status${force ? '?force=1' : ''}`, {
+          credentials: 'same-origin'
+        });
+        const data = await resp.json().catch(() => ({}));
+        if (resp.ok && data?.success) {
+          this.status = data.data as SandboxStatus;
+        }
+      } catch {
+        // 检测失败保持沉默（不打扰正常使用）
+      } finally {
+        this.checking = false;
+      }
+    },
+
+    /** 进页面自动检测：未就绪且未被打断偏好时弹出向导 */
+    async autoCheck(): Promise<void> {
+      await this.fetchStatus();
+      // 安装任务可能因页面刷新而仍在后台运行：恢复进度并重新打开弹窗
+      if (this.status?.setup_running) {
+        this.dialogVisible = true;
+        this.startPolling();
+        return;
+      }
+      if (this.shouldAutoPrompt) {
+        this.dialogVisible = true;
+      }
+    },
+
+    async recheck(): Promise<void> {
+      await this.fetchStatus(true);
+    },
+
+    openWizard(): void {
+      this.dialogVisible = true;
+      if (this.progress?.active) this.startPolling();
+      if (!this.status) void this.fetchStatus();
+    },
+
+    /** 「暂不安装」：12 小时内不再自动弹出 */
+    snooze(): void {
+      this.snoozed = true;
+      try {
+        sessionStorage.setItem(SNOOZE_KEY, String(Date.now()));
+      } catch {
+        /* ignore */
+      }
+      this.dialogVisible = false;
+    },
+
+    setNeverAsk(): void {
+      try {
+        localStorage.setItem(NEVER_KEY, '1');
+      } catch {
+        /* ignore */
+      }
+    },
+
+    resetNeverAsk(): void {
+      try {
+        localStorage.removeItem(NEVER_KEY);
+      } catch {
+        /* ignore */
+      }
+    },
+
+    /** 「不再提示」勾选后随暂不安装一起生效；安装中不允许关闭 */
+    closeDialog(never: boolean): void {
+      if (this.progress?.active) return;
+      if (never) this.setNeverAsk();
+      this.snooze();
+    },
+
+    async startSetup(): Promise<void> {
+      if (this.starting || this.progress?.active) return;
+      this.starting = true;
+      try {
+        const resp = await fetch('/api/sandbox/setup', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          credentials: 'same-origin',
+          body: JSON.stringify({ enable_wsl_if_needed: true })
+        });
+        const data = await resp.json().catch(() => ({}));
+        if (resp.ok && data?.success) {
+          this.progress = data.data as SetupProgress;
+          this.startPolling();
+        } else {
+          // 启动失败（如并发）：以进度对象呈现错误
+          this.progress = {
+            active: false,
+            phase: 'error',
+            step_index: 0,
+            step_total: 6,
+            step_title: '',
+            log_tail: [],
+            download_bytes: null,
+            download_total: null,
+            error: data?.error || 'start failed',
+            error_kind: 'start_failed',
+            updated_at: Date.now() / 1000
+          };
+        }
+      } catch {
+        this.progress = {
+          active: false,
+          phase: 'error',
+          step_index: 0,
+          step_total: 6,
+          step_title: '',
+          log_tail: [],
+          download_bytes: null,
+          download_total: null,
+          error: 'network error',
+          error_kind: 'start_failed',
+          updated_at: Date.now() / 1000
+        };
+      } finally {
+        this.starting = false;
+      }
+    },
+
+    startPolling(): void {
+      if (this.pollTimer) return;
+      void this.pollOnce();
+      this.pollTimer = setInterval(() => void this.pollOnce(), POLL_INTERVAL_MS);
+    },
+
+    stopPolling(): void {
+      if (this.pollTimer) {
+        clearInterval(this.pollTimer);
+        this.pollTimer = null;
+      }
+    },
+
+    async pollOnce(): Promise<void> {
+      try {
+        const resp = await fetch('/api/sandbox/setup/status', { credentials: 'same-origin' });
+        const data = await resp.json().catch(() => ({}));
+        if (!resp.ok || !data?.success) return;
+        this.progress = data.data as SetupProgress;
+        if (!this.progress.active) {
+          this.stopPolling();
+          if (this.progress.phase === 'done') {
+            // 安装成功：刷新检测状态（应为 ready）
+            void this.fetchStatus(true);
+          }
+        }
+      } catch {
+        /* 轮询失败静默，下个周期重试 */
+      }
+    },
+
+    /** 安装失败/需重启后重试：清空进度重新发起 */
+    async retrySetup(): Promise<void> {
+      this.progress = null;
+      await this.startSetup();
+    }
+  }
+});