Fix: Switch the default theme from light mode to dark mode and improve some styles #9869 (#10552)

### What problem does this PR solve?

Fix: Switch the default theme from light mode to dark mode and improve
some styles #9869
-Update UI component styles such as input boxes, tables, and prompt
boxes
-Optimize login page layout and style details
-Revise some of the wording, such as uniformly changing "data flow" to
"pipeline"
-Adjust the parser to support the markdown type

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/home/application-card.tsx

@@ -20,15 +20,15 @@ export function ApplicationCard({
 }: ApplicationCardProps) {
   return (
     <Card className="w-[264px]" onClick={onClick}>
-      <CardContent className="p-2.5  group flex justify-between">
-        <div className="flex items-center gap-2.5">
+      <CardContent className="p-2.5  group flex justify-between w-full">
+        <div className="flex items-center gap-2.5 w-full">
           <RAGFlowAvatar
             className="size-14 rounded-lg"
             avatar={app.avatar}
             name={app.title || 'CN'}
           ></RAGFlowAvatar>
           <div className="flex-1">
-            <h3 className="text-sm font-normal line-clamp-1 mb-1">
+            <h3 className="text-sm font-normal line-clamp-1 mb-1 text-ellipsis w-[180px] overflow-hidden">
               {app.title}
             </h3>
             <p className="text-xs font-normal text-text-secondary">