提升extent变量状态；修改部分默认值

src/contexts/ProjectContext.tsx

@@ -7,6 +7,7 @@ import { ProjectSelector } from "@/components/project/ProjectSelector";
 interface ProjectContextType {
   workspace: string;
   networkName: string;
+  extent: number[];
 }
 
 const ProjectContext = createContext<ProjectContextType | undefined>(undefined);
@@ -19,6 +20,7 @@ export const ProjectProvider: React.FC<{ children: React.ReactNode }> = ({
   const [currentProject, setCurrentProject] = useState({
     workspace: config.MAP_WORKSPACE,
     networkName: NETWORK_NAME || "tjwater",
+    extent: config.MAP_EXTENT,
   });
 
   useEffect(() => {
@@ -47,7 +49,7 @@ export const ProjectProvider: React.FC<{ children: React.ReactNode }> = ({
       localStorage.removeItem(`${ws}_map_view`);
     }
 
-    setCurrentProject({ workspace: ws, networkName: net });
+    setCurrentProject({ workspace: ws, networkName: net, extent: extent || config.MAP_EXTENT });
 
     // Save to localStorage
     localStorage.setItem("NEXT_PUBLIC_MAP_WORKSPACE", ws);