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

static/css/style.css

@@ -2151,4 +2151,78 @@ body {
 
 .session-actions-header {
     flex-shrink: 0;
+}
+
+/* ==================== MODULE GRID (Home Page) ==================== */
+
+.module-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
+    gap: var(--space-xl);
+    margin-top: var(--space-xl);
+}
+
+.module-card {
+    background: var(--color-surface);
+    border: 2px solid var(--color-border);
+    border-radius: var(--radius-xl);
+    padding: var(--space-2xl) var(--space-xl);
+    text-decoration: none;
+    text-align: center;
+    transition: var(--transition);
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: var(--space-md);
+}
+
+.module-card:hover {
+    border-color: var(--color-primary);
+    transform: translateY(-4px);
+    box-shadow: var(--shadow-glow), var(--shadow-lg);
+}
+
+.module-icon {
+    width: 80px;
+    height: 80px;
+    background: var(--color-primary-glow);
+    border: 2px solid var(--color-primary);
+    border-radius: var(--radius-lg);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 2.5rem;
+    color: var(--color-primary);
+    transition: var(--transition);
+}
+
+.module-card:hover .module-icon {
+    background: var(--color-primary);
+    color: var(--color-bg);
+    box-shadow: 0 0 30px var(--color-primary-glow);
+}
+
+.module-name {
+    font-size: 1.5rem;
+    font-weight: 700;
+    color: var(--color-text);
+    margin: 0;
+}
+
+.module-desc {
+    font-size: 0.9rem;
+    color: var(--color-text-muted);
+    margin: 0;
+    line-height: 1.5;
+}
+/* ==================== MODAL SCROLL FIX ==================== */
+
+.modal {
+    overflow-y: auto;
+    padding: var(--space-xl) 0;
+}
+
+.modal-content {
+    max-height: none;
+    margin: auto;
 }