feat: Add Global Module Settings and Caption to Images

- Introduced GlobalModuleSettings model for platform-wide module enable/disable settings.
- Added 'caption' field to Images model to store image captions.
- Updated GenerateImagePromptsFunction to handle new caption structure in prompts.
- Enhanced AIPromptViewSet to return global prompt types and validate active prompts.
- Modified serializers and views to accommodate new caption field and global settings.
- Updated frontend components to display captions and filter prompts based on active types.
- Created migrations for GlobalModuleSettings and added caption field to Images.

backend/igny8_core/modules/system/admin.py

@@ -10,6 +10,7 @@ from .global_settings_models import (
     GlobalAIPrompt,
     GlobalAuthorProfile,
     GlobalStrategy,
+    GlobalModuleSettings,
 )
 
 from django.contrib import messages
@@ -445,3 +446,55 @@ class GlobalStrategyAdmin(ImportExportMixin, Igny8ModelAdmin):
         }),
     )
 
+
+@admin.register(GlobalModuleSettings)
+class GlobalModuleSettingsAdmin(Igny8ModelAdmin):
+    """
+    Admin for global module enable/disable settings.
+    Singleton model - only one record exists.
+    Controls which modules are available platform-wide.
+    """
+    
+    def has_add_permission(self, request):
+        """Only allow one instance"""
+        return not GlobalModuleSettings.objects.exists()
+    
+    def has_delete_permission(self, request, obj=None):
+        """Prevent deletion of singleton"""
+        return False
+    
+    fieldsets = (
+        ('Module Availability (Platform-Wide)', {
+            'fields': (
+                'planner_enabled',
+                'writer_enabled',
+                'thinker_enabled',
+                'automation_enabled',
+                'site_builder_enabled',
+                'linker_enabled',
+                'optimizer_enabled',
+                'publisher_enabled',
+            ),
+            'description': 'Control which modules are available across the entire platform. Disabled modules will not load for ANY user.'
+        }),
+        ('Metadata', {
+            'fields': ('created_at', 'updated_at'),
+            'classes': ('collapse',)
+        }),
+    )
+    
+    readonly_fields = ['created_at', 'updated_at']
+    
+    list_display = [
+        'id',
+        'planner_enabled',
+        'writer_enabled',
+        'thinker_enabled',
+        'automation_enabled',
+        'site_builder_enabled',
+        'linker_enabled',
+        'optimizer_enabled',
+        'publisher_enabled',
+        'updated_at',
+    ]
+