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/business/content/models.py

@@ -436,6 +436,7 @@ class Images(SoftDeletableModel, SiteSectorBaseModel):
     image_url = models.CharField(max_length=500, blank=True, null=True, help_text="URL of the generated/stored image")
     image_path = models.CharField(max_length=500, blank=True, null=True, help_text="Local path if stored locally")
     prompt = models.TextField(blank=True, null=True, help_text="Image generation prompt used")
+    caption = models.TextField(blank=True, null=True, help_text="Image caption (40-60 words) to display with the image")
     status = models.CharField(max_length=50, default='pending', help_text="Status: pending, generated, failed")
     position = models.IntegerField(default=0, help_text="Position for in-article images ordering")
     created_at = models.DateTimeField(auto_now_add=True)