Improve calendar view and add scheduling conflict warnings

Enhance the calendar list view to prioritize today's date and introduce visual indicators for optimal posting times and existing scheduled posts on the new post page.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/VJoXNjs

client/src/components/calendar-list-view.tsx

@@ -42,8 +42,15 @@ export default function CalendarListView({ scheduledPosts, onEditPost, onDeleteP
     return acc;
   }, {});
 
-  // Sort dates
-  const sortedDates = Object.keys(groupedPosts).sort();
+  // Sort dates - put today first, then chronological order
+  const today = format(new Date(), "yyyy-MM-dd");
+  const sortedDates = Object.keys(groupedPosts).sort((a, b) => {
+    // Today always comes first
+    if (a === today && b !== today) return -1;
+    if (b === today && a !== today) return 1;
+    // Otherwise chronological order
+    return a.localeCompare(b);
+  });
 
   const toggleDate = (date: string) => {
     const newExpanded = new Set(expandedDates);