feat: Replaced Search icon with Download icon on Collect All Monitored…

- "src/frontend/src/pages/Channels.tsx"

GSD-Task: S02/T01

src/frontend/src/pages/Channels.tsx

@@ -1,6 +1,6 @@
 import { useState, useMemo, useCallback } from 'react';
 import { useNavigate } from 'react-router-dom';
-import { Plus, Loader, RefreshCw, Search } from 'lucide-react';
+import { Plus, Loader, RefreshCw, Download } from 'lucide-react';
 import { useChannels, useScanAllChannels } from '../api/hooks/useChannels';
 import { useCollectAllMonitored } from '../api/hooks/useContent';
 import { Table, type Column } from '../components/Table';
@@ -240,7 +240,7 @@ export function Channels() {
             {collectAll.isPending ? (
               <Loader size={16} style={{ animation: 'spin 1s linear infinite' }} />
             ) : (
-              <Search size={16} />
+              <Download size={16} />
             )}
             {collectAll.isPending ? 'Collecting...' : 'Collect All Monitored'}
           </button>