新增项目选择弹窗（预设选项），支持变更环境变量

src/contexts/ProjectContext.tsx

@@ -0,0 +1,64 @@
+"use client";
+import React, { createContext, useContext, useEffect, useState } from "react";
+import { useSession } from "next-auth/react";
+import { config, NETWORK_NAME, setMapWorkspace, setNetworkName } from "@/config/config";
+import { ProjectSelector } from "@/components/project/ProjectSelector";
+
+interface ProjectContextType {
+  workspace: string;
+  networkName: string;
+}
+
+const ProjectContext = createContext<ProjectContextType | undefined>(undefined);
+
+export const ProjectProvider: React.FC<{ children: React.ReactNode }> = ({
+  children,
+}) => {
+  const { status } = useSession();
+  const [isConfigured, setIsConfigured] = useState(false);
+  const [currentProject, setCurrentProject] = useState({
+    workspace: config.MAP_WORKSPACE,
+    networkName: NETWORK_NAME || "tjwater",
+  });
+
+  useEffect(() => {
+    // Check localStorage
+    const savedWorkspace = localStorage.getItem("NEXT_PUBLIC_MAP_WORKSPACE");
+    const savedNetwork = localStorage.getItem("NEXT_PUBLIC_NETWORK_NAME");
+
+    // If we have saved config, use it.
+    if (savedWorkspace && savedNetwork) {
+      applyConfig(savedWorkspace, savedNetwork);
+    }
+  }, []);
+
+  const applyConfig = (ws: string, net: string) => {
+    setMapWorkspace(ws);
+    setNetworkName(net);
+    setCurrentProject({ workspace: ws, networkName: net });
+    
+    // Save to localStorage
+    localStorage.setItem("NEXT_PUBLIC_MAP_WORKSPACE", ws);
+    localStorage.setItem("NEXT_PUBLIC_NETWORK_NAME", net);
+    
+    setIsConfigured(true);
+  };
+
+  // Only show selector if authenticated and not configured
+  if (status === "authenticated" && !isConfigured) {
+    return (
+      <ProjectSelector
+        open={true}
+        onSelect={(ws, net) => applyConfig(ws, net)}
+      />
+    );
+  }
+
+  return (
+    <ProjectContext.Provider value={currentProject}>
+      {children}
+    </ProjectContext.Provider>
+  );
+};
+
+export const useProject = () => useContext(ProjectContext);