refactor: rename public routes and templates to platform

Complete the public -> platform naming migration across the codebase.
This aligns with the naming convention where "platform" refers to
the marketing/public-facing pages of the platform itself.

Changes:
- Update all imports from public to platform modules
- Update template references from public/ to platform/
- Update route registrations to use platform prefix
- Update documentation to reflect new naming
- Update test files for platform API endpoints

Files affected:
- app/api/main.py - router imports
- app/modules/*/routes/*/platform.py - route definitions
- app/modules/*/templates/*/platform/ - template files
- app/modules/routes.py - route discovery
- docs/* - documentation updates
- tests/integration/api/v1/platform/ - test files

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

app/modules/cms/routes/pages/platform.py

@@ -1,8 +1,8 @@
-# app/modules/cms/routes/pages/public.py
+# app/modules/cms/routes/pages/platform.py
 """
-CMS Public Page Routes (HTML rendering).
+CMS Platform Page Routes (HTML rendering).
 
-Public (unauthenticated) pages for platform content:
+Platform (unauthenticated) pages for platform content:
 - Homepage
 - Generic content pages (/{slug} catch-all)
 """
@@ -16,7 +16,7 @@ from sqlalchemy.orm import Session
 from app.core.database import get_db
 from app.modules.billing.models import TIER_LIMITS, TierCode
 from app.modules.cms.services import content_page_service
-from app.modules.core.utils.page_context import get_public_context
+from app.modules.core.utils.page_context import get_platform_context
 from app.templates_config import templates
 
 logger = logging.getLogger(__name__)
@@ -147,19 +147,19 @@ async def homepage(
 
     if cms_homepage:
         # Use CMS-based homepage with template selection
-        context = get_public_context(request, db)
+        context = get_platform_context(request, db)
         context["page"] = cms_homepage
         context["tiers"] = _get_tiers_data()
 
         template_name = cms_homepage.template or "default"
-        template_path = f"cms/public/homepage-{template_name}.html"
+        template_path = f"cms/platform/homepage-{template_name}.html"
 
         logger.info(f"[HOMEPAGE] Rendering CMS homepage with template: {template_path}")
         return templates.TemplateResponse(template_path, context)
 
     # Fallback: Default wizamart homepage (no CMS content)
     logger.info("[HOMEPAGE] No CMS homepage found, using default wizamart template")
-    context = get_public_context(request, db)
+    context = get_platform_context(request, db)
     context["tiers"] = _get_tiers_data()
 
     # Add-ons (hardcoded for now, will come from DB)
@@ -196,7 +196,7 @@ async def homepage(
     ]
 
     return templates.TemplateResponse(
-        "cms/public/homepage-wizamart.html",
+        "cms/platform/homepage-wizamart.html",
         context,
     )
 
@@ -231,11 +231,11 @@ async def content_page(
     if not page:
         raise HTTPException(status_code=404, detail=f"Page not found: {slug}")
 
-    context = get_public_context(request, db)
+    context = get_platform_context(request, db)
     context["page"] = page
     context["page_title"] = page.title
 
     return templates.TemplateResponse(
-        "cms/public/content-page.html",
+        "cms/platform/content-page.html",
         context,
     )