完成管道冲洗功能页面；调整水质模拟默认pattern；调整sidebar菜单名；

src/components/olmap/ContaminantSimulation/AnalysisParameters.tsx

@@ -181,7 +181,7 @@ const AnalysisParameters: React.FC = () => {
         source: sourceNode,
         concentration,
         duration,
-        pattern: pattern || undefined,
+        pattern: pattern || "CONSTANT",
         scheme_name: schemeName,
       };
 
@@ -276,7 +276,7 @@ const AnalysisParameters: React.FC = () => {
         <Stack spacing={2}>
           {sourceNode ? (
             <Box className="flex items-center gap-2 p-2 bg-gray-50 rounded">
-              <Typography className="flex-shrink-0 text-sm">
+              <Typography className="flex-shrink-0 pl-1 text-sm">
                 {sourceNode}
               </Typography>
               <Typography className="flex-shrink-0 text-sm text-gray-600">
@@ -373,7 +373,7 @@ const AnalysisParameters: React.FC = () => {
           size="small"
           value={pattern}
           onChange={(e) => setPattern(e.target.value)}
-          placeholder="可选，输入 pattern 名称"
+          placeholder="可选，输入 pattern 名称，默认为 CONSTANT"
         />
       </Box>