fix: correct icon names in platform-modules.js

Map module icons to available icons in icons.js:
- building-office → office-building
- archive-box → archive
- chat-bubble-left-right → chat
- code-bracket → code
- chart-bar-square → chart-pie
- puzzle (fallback) → puzzle-piece

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

static/admin/js/platform-modules.js

@@ -39,23 +39,23 @@ function adminPlatformModules(platformCode) {
             return this.optionalModules.filter(m => m.is_enabled).length;
         },
 
-        // Module icons mapping
+        // Module icons mapping (must match icons.js definitions)
         getModuleIcon(moduleCode) {
             const icons = {
                 'core': 'home',
-                'platform-admin': 'building-office',
+                'platform-admin': 'office-building',
                 'billing': 'credit-card',
-                'inventory': 'archive-box',
+                'inventory': 'archive',
                 'orders': 'shopping-cart',
                 'marketplace': 'shopping-bag',
                 'customers': 'users',
                 'cms': 'document-text',
                 'analytics': 'chart-bar',
-                'messaging': 'chat-bubble-left-right',
-                'dev-tools': 'code-bracket',
-                'monitoring': 'chart-bar-square'
+                'messaging': 'chat',
+                'dev-tools': 'code',
+                'monitoring': 'chart-pie'
             };
-            return icons[moduleCode] || 'puzzle';
+            return icons[moduleCode] || 'puzzle-piece';
         },
 
         async init() {