Fix: Optimize page layout and style #3221 (#9852)

### What problem does this PR solve?

Fix: Optimize page layout and style #3221

- Added the cursor-pointer class to the logo in the Header component
- Added an icon property to the ListFilterBar in the Agents and ChatList
components
- Adjusted the Dataset page layout and set a minimum width
- Optimized the DatasetWrapper page layout and added the overflow-auto
class
- Simplified the search icon in the SearchList component

### Type of change

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

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

web/src/pages/next-searches/index.tsx

@@ -114,11 +114,7 @@ export default function SearchList() {
     <section className="w-full h-full flex flex-col">
       <div className="px-8 pt-8">
         <ListFilterBar
-          icon={
-            <div className="rounded-sm bg-emerald-400 bg-gradient-to-t from-emerald-400 via-emerald-400 to-emerald-200 p-1 size-6 flex justify-center items-center">
-              <Search size={14} className="font-bold m-auto" />
-            </div>
-          }
+          icon="search"
           title="Search apps"
           showFilter={false}
           onSearchChange={(e) => handleSearchChange(e.target.value)}