Fix scrolling issue to display all lines on pages

Adjust main content containers to use flex-1 for proper vertical scrolling across various pages, resolving an issue where some lines were not visible.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: cc8ba926-557c-4bf1-a2ea-ceabbcf38824
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/cc8ba926-557c-4bf1-a2ea-ceabbcf38824/ZtgwSaL

client/src/components/Layout.tsx

@@ -90,7 +90,7 @@ export default function Layout({ children }: LayoutProps) {
         {/* Desktop Sidebar */}
         {!isMobile && <Sidebar />}
         
-        <main className={`flex-1 flex flex-col overflow-hidden ${
+        <main className={`flex-1 flex flex-col ${
           isMobile ? 'ml-0' : sidebarCollapsed ? 'ml-16' : 'ml-64'
         }`}>
           {/* Header with store selector for admin */}