Add site builder service to Docker Compose and remove obsolete scripts

- Introduced a new service `igny8_site_builder` in `docker-compose.app.yml` for site building functionality, including environment variables and volume mappings.
- Deleted several outdated scripts: `create_test_users.py`, `test_image_write_access.py`, `update_free_plan.py`, and the database file `db.sqlite3` to clean up the backend.
- Updated Django settings and URL configurations to integrate the new site builder module.

backend/igny8_core/ai/prompts.py

@@ -238,6 +238,73 @@ OUTPUT FORMAT
 
 Return ONLY the final JSON object.  
 Do NOT include any comments, formatting, or explanations.""",
+
+        'site_structure_generation': """You are a senior UX architect and information designer. Use the business brief, objectives, style references, and existing site info to propose a complete multi-page marketing website structure.
+
+INPUT CONTEXT
+==============
+BUSINESS BRIEF:
+[IGNY8_BUSINESS_BRIEF]
+
+PRIMARY OBJECTIVES:
+[IGNY8_OBJECTIVES]
+
+STYLE & BRAND NOTES:
+[IGNY8_STYLE]
+
+SITE INFO / CURRENT STRUCTURE:
+[IGNY8_SITE_INFO]
+
+OUTPUT REQUIREMENTS
+====================
+Return ONE JSON object with the following keys:
+
+{
+  "site": {
+    "name": "...",
+    "primary_navigation": ["home", "services", "about", "contact"],
+    "secondary_navigation": ["blog", "faq"],
+    "hero_message": "High level value statement",
+    "tone": "voice + tone summary"
+  },
+  "pages": [
+    {
+      "slug": "home",
+      "title": "Home",
+      "type": "home | about | services | products | blog | contact | custom",
+      "status": "draft",
+      "objective": "Explain the core brand promise and primary CTA",
+      "primary_cta": "Book a strategy call",
+      "seo": {
+        "meta_title": "...",
+        "meta_description": "..."
+      },
+      "blocks": [
+        {
+          "type": "hero | features | services | stats | testimonials | faq | contact | custom",
+          "heading": "Section headline",
+          "subheading": "Support copy",
+          "layout": "full-width | two-column | cards | carousel",
+          "content": [
+            "Bullet or short paragraph describing what to render in this block"
+          ]
+        }
+      ]
+    }
+  ]
+}
+
+RULES
+=====
+- Include 5–8 pages covering the complete buyer journey (awareness → evaluation → conversion → trust).
+- Every page must have at least 3 blocks with concrete guidance (no placeholders like "Lorem ipsum").
+- Use consistent slug naming, all lowercase with hyphens.
+- Type must match the allowed enum and reflect page intent.
+- Ensure the navigation arrays align with the page list.
+- Focus on practical descriptions that an engineering team can hand off directly to the Site Builder.
+
+Return ONLY valid JSON. No commentary, explanations, or Markdown.
+""",
         
         'image_prompt_extraction': """Extract image prompts from the following article content.
 
@@ -275,6 +342,7 @@ Make sure each prompt is detailed enough for image generation, describing the vi
         'generate_images': 'image_prompt_extraction',
         'extract_image_prompts': 'image_prompt_extraction',
         'generate_image_prompts': 'image_prompt_extraction',
+        'generate_site_structure': 'site_structure_generation',
     }
     
     @classmethod