提升extent变量状态；修改部分默认值

src/app/OlMap/MapComponent.tsx

@@ -96,12 +96,15 @@ export const useData = () => {
 };
 
 const MapComponent: React.FC<MapComponentProps> = ({ children }) => {
-  const MAP_EXTENT = config.MAP_EXTENT as [number, number, number, number];
-  const MAP_URL = config.MAP_URL;
-  
-  // Subscribe to project context for workspace changes
   const project = useProject();
   const MAP_WORKSPACE = project?.workspace || config.MAP_WORKSPACE;
+  const MAP_EXTENT = (project?.extent || config.MAP_EXTENT) as [
+    number,
+    number,
+    number,
+    number,
+  ];
+  const MAP_URL = config.MAP_URL;
   const MAP_VIEW_STORAGE_KEY = `${MAP_WORKSPACE}_map_view`; // 持久化 key
 
   const mapRef = useRef<HTMLDivElement | null>(null);
@@ -464,7 +467,7 @@ const MapComponent: React.FC<MapComponentProps> = ({ children }) => {
   const scadaLayer = new VectorLayer({
     source: scadaSource,
     style: scadaStyle,
-    // extent: extent, // 设置图层范围
+    extent: MAP_EXTENT, // 设置图层范围
     maxZoom: 24,
     minZoom: 11,
     properties: {

src/components/project/ProjectSelector.tsx

@@ -155,7 +155,7 @@ export const ProjectSelector: React.FC<ProjectSelectorProps> = ({
               value={workspace}
               onChange={(e) => setWorkspace(e.target.value)}
               fullWidth
-              helperText="例如: TJWater"
+              helperText="例如: tjwater"
             />
             <TextField
               label="管网名称"

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);