Rename all 1,169 components to path-based names with namespace support

Component names now reflect filesystem location using / as path separator
and : as namespace separator for shared components:
  ~sx-header → ~layouts/header
  ~layout-app-body → ~shared:layout/app-body
  ~blog-admin-dashboard → ~admin/dashboard

209 files, 4,941 replacements across all services.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/sx/page.py

@@ -15,7 +15,7 @@ Usage::
 
     # Error pages (no context needed)
     html = render_page(
-        '(~error-page :title "Not Found" :message "NOT FOUND" :image img :asset-url aurl)',
+        '(~shared:pages/error-page :title "Not Found" :message "NOT FOUND" :image img :asset-url aurl)',
         image="/static/errors/404.gif",
         asset_url="/static",
     )