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/home.html

@@ -0,0 +1,42 @@
+{% extends "base.html" %}
+
+{% block title %}Home - ScanLook{% endblock %}
+
+{% block content %}
+<div class="dashboard-container">
+    
+    <!-- Admin Button (only for admins/owners) -->
+    {% if session.role in ['owner', 'admin'] %}
+    <div class="mode-selector">
+        <a href="{{ url_for('admin_dashboard') }}" class="mode-btn">
+            👔 Admin Console
+        </a>
+    </div>
+    {% endif %}
+
+    <div class="dashboard-header">
+        <h1 class="page-title">Welcome, {{ session.full_name }}</h1>
+        <p class="page-subtitle">Select a module to get started</p>
+    </div>
+
+    {% if modules %}
+        <div class="module-grid">
+            {% for m in modules %}
+            <a href="{{ url_for(m.module_key + '.index') }}" class="module-card">
+                <div class="module-icon">
+                    <i class="fa-solid {{ m.icon }}"></i>
+                </div>
+                <h3 class="module-name">{{ m.module_name }}</h3>
+                <p class="module-desc">{{ m.description }}</p>
+            </a>
+            {% endfor %}
+        </div>
+    {% else %}
+        <div class="empty-state">
+            <div class="empty-icon">🔒</div>
+            <h2 class="empty-title">No Modules Available</h2>
+            <p class="empty-text">You don't have access to any modules. Please contact your administrator.</p>
+        </div>
+    {% endif %}
+</div>
+{% endblock %}