v0.12.0 - Add modular system architecture with user-based module access

- Add Modules and UserModules database tables
- Create home page with module selection grid
- Implement per-user module assignment in user management
- Add route guards for module access control
- Refactor navigation: login -> home -> modules, admin console via button
- Add Font Awesome icons

templates/count_session.html

@@ -5,7 +5,7 @@
 {% block content %}
 <div class="count-container">
     <div class="count-header">
-        <a href="{{ url_for('dashboard') }}" class="breadcrumb">← Back</a>
+        <a href="{{ url_for('admin_dashboard') }}" class="breadcrumb">← Back</a>
         <h1 class="page-title">{{ session.session_name }}</h1>
     </div>