style: replace square icon with inbox icon for created status

Icon Update:
- created status: square → inbox

Rationale:
- Inbox icon is more visually intuitive
- Better conveys the meaning of 'new/pending task'
- Improves visual clarity and user understanding

Status Icons Now:
- created: 📥 inbox (new/pending)
- running: ⚡ zap (active)
- paused: ⏸ pause (paused)
- completed: ✓ check (finished)
- failed: ⚠️ alert-triangle (error)

ccw/src/templates/dashboard-js/views/loop-monitor.js

@@ -305,7 +305,7 @@ function renderLoopCard(loop) {
 
   // Lucide icons for each status
   const statusIcons = {
-    created: 'square',
+    created: 'inbox',
     running: 'zap',
     paused: 'pause',
     completed: 'check',
@@ -1318,13 +1318,13 @@ window.destroyLoopMonitor = function() {
 // Helper functions
 function getStatusIcon(status) {
   const icons = {
-    created: 'square',
+    created: 'inbox',
     running: 'zap',
     paused: 'pause',
     completed: 'check',
     failed: 'alert-triangle'
   };
-  return icons[status] || 'square';
+  return icons[status] || 'inbox';
 }
 
 function escapeHtml(text) {