fix(web): solve p0 mapping, nested validation, and add health checks

src/env_detect.py

@@ -36,6 +36,15 @@ def _check_ld_paths() -> List[str]:
     return paths[:10]  # 限制输出长度
 
 
+def _cpp_runtime_available() -> bool:
+    """检测 C++ 运行时能力（不依赖编译器）"""
+    try:
+        import ctypes  # noqa: F401
+    except Exception:
+        return False
+    return platform.system().lower() in {"linux", "darwin", "windows"}
+
+
 def collect_env_info() -> Dict[str, Any]:
     """收集完整的环境信息"""
     compilers = {
@@ -45,6 +54,8 @@ def collect_env_info() -> Dict[str, Any]:
         "clang++": shutil.which("clang++"),
         "cl": shutil.which("cl"),  # MSVC
     }
+    compile_available = any(compilers.values())
+    runtime_available = _cpp_runtime_available()
     
     return {
         "python": {
@@ -64,11 +75,15 @@ def collect_env_info() -> Dict[str, Any]:
         },
         "cpp": {
             "compilers": {k: v for k, v in compilers.items() if v},
-            "any_available": any(compilers.values()),
+            "compile_available": compile_available,
+            "runtime_available": runtime_available,
+            # Backward-compatible alias (historically used as "is cpp usable")
+            "any_available": runtime_available,
         },
         "ld_paths": _check_ld_paths(),
         "scipy_available": _has_module("scipy"),
         "numpy_available": _has_module("numpy"),
+        "web_available": _has_module("requests"),
     }
 
 
@@ -80,12 +95,33 @@ def get_available_algo_types() -> List[str]:
     if env["matlab"]["engine_available"] or env["matlab"]["oct2py_available"] or env["matlab"]["octave_cli"]:
         types.append("matlab")
     
-    if env["cpp"]["any_available"]:
+    # C++ 运行时可用即视为可执行（编译器仅影响“从源码编译”能力）
+    if env["cpp"]["runtime_available"]:
         types.append("cpp")
+
+    if env["web_available"]:
+        types.append("web")
     
     return types
 
 
+def check_endpoint_active(url: str, timeout: int = 5) -> Tuple[bool, str]:
+    """检查远程端点是否存活"""
+    try:
+        import requests
+        # 对根路径发起 GET 请求进行探活
+        from urllib.parse import urljoin, urlparse
+        parsed = urlparse(url)
+        base_url = f"{parsed.scheme}://{parsed.netloc}"
+        
+        resp = requests.get(base_url, timeout=timeout)
+        if resp.status_code < 500:
+            return True, f"Active (HTTP {resp.status_code})"
+        return False, f"Server Error (HTTP {resp.status_code})"
+    except Exception as e:
+        return False, f"Disconnected: {str(e)}"
+
+
 def get_actionable_suggestions() -> List[Dict[str, str]]:
     """针对故障环境提供具体的修复指令建议"""
     env = collect_env_info()
@@ -106,10 +142,16 @@ def get_actionable_suggestions() -> List[Dict[str, str]]:
         })
 
     # C++ 建议
-    if not env["cpp"]["any_available"]:
+    if not env["cpp"]["runtime_available"]:
+        suggestions.append({
+            "target": "C++ Runtime",
+            "reason": "当前 Python 环境缺少 ctypes/动态链接支持",
+            "fix": "请使用包含 ctypes 的标准 Python 发行版，或联系交付方提供兼容运行环境。",
+        })
+    elif not env["cpp"]["compile_available"]:
         suggestions.append({
             "target": "C++ Compiler",
-            "reason": "未检测到 gcc/g++/clang 等编译器",
+            "reason": "未检测到 gcc/g++/clang 等编译器（仅影响“从源码编译”能力）",
             "fix": "建议安装基础构建工具: `sudo apt install build-essential`"
         })