feat(platform): 合并车辆运维页并优化 3D 画布嵌入体验

将维护策略与车队生命周期并入车辆运维 Tab，补充旧路由重定向与 RBAC 页面 key 迁移；改进 Workspace3D 就绪探测与 wwwroot 静态资源。

Co-authored-by: Cursor <cursoragent@cursor.com>

MiGu.Server/Auth/PageCatalog.cs

@@ -45,14 +45,12 @@ public static class PageCatalog
         new("admin-config-system", "系统级配置", "平台配置中心", ScopePlatform),
         new("admin-config-integrations", "外部系统对接", "平台配置中心", ScopePlatform),
         new("admin-config-routing", "路径规划", "平台配置中心", ScopePlatform),
-        new("admin-config-vehicle", "车辆维护策略", "平台配置中心", ScopePlatform),
         new("admin-vehicle-hub", "车辆运维", "平台配置中心", ScopePlatform),
         new("admin-config-charge", "充电策略", "平台配置中心", ScopePlatform),
         new("admin-config-task", "任务分配", "平台配置中心", ScopePlatform),
         new("admin-config-traffic", "交通管制", "平台配置中心", ScopePlatform),
         new("admin-config-auth", "权限与角色", "平台配置中心", ScopePlatform),
         new("admin-config-device", "设备接入", "平台配置中心", ScopePlatform),
-        new("admin-config-fleet", "车队生命周期", "平台配置中心", ScopePlatform),
         new("admin-config-scenario", "场景模板", "平台配置中心", ScopePlatform),
         new("admin-config-location", "库位管理", "平台配置中心", ScopePlatform),
         new("admin-config-ops", "运营维护", "平台配置中心", ScopePlatform),
@@ -70,9 +68,21 @@ public static class PageCatalog
     private static readonly HashSet<string> _keys =
         All.Select(p => p.Key).ToHashSet(StringComparer.OrdinalIgnoreCase);
 
+    /// <summary>已下线页面 Key → 合并后的新 Key（角色数据迁移用）。</summary>
+    private static readonly IReadOnlyDictionary<string, string> LegacyKeyAliases =
+        new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["admin-config-vehicle"] = "admin-vehicle-hub",
+            ["admin-config-fleet"] = "admin-vehicle-hub",
+        };
+
     /// <summary>判断页面 Key 是否合法（用于角色保存时过滤掉脏数据 / 已下线页面）。</summary>
     public static bool IsValidKey(string key) => _keys.Contains(key);
 
+    /// <summary>将旧页面 Key 映射为当前有效 Key；未知 Key 原样返回。</summary>
+    public static string NormalizeKey(string key) =>
+        LegacyKeyAliases.TryGetValue(key, out var mapped) ? mapped : key;
+
     /// <summary>列出某 scope 下的全部页面 Key（用于把角色的 "*" 通配展开成具体页面集合）。</summary>
     public static IReadOnlyList<string> KeysForScope(string scope) =>
         All.Where(p => string.Equals(p.Scope, scope, StringComparison.OrdinalIgnoreCase))