Fix Time Tracking header jump by standardizing container classes

- Replace time-tracking-container with page-container for consistency
- Update all timetrack pages to use standard page-container class
- Remove duplicate timetrack-container class references
- This ensures consistent header positioning across all pages

templates/_time_tracking_interface.html

@@ -1,5 +1,5 @@
 <!-- Time Tracking Interface - Shared Component -->
-<div class="time-tracking-container">
+<div class="page-container">
     <!-- Header Section -->
     <div class="page-header">
         <div class="header-content">