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/browser/app/errors.py

@@ -62,7 +62,7 @@ def _sx_error_page(errnum: str, message: str, image: str | None = None) -> str:
     from shared.sx.page import render_page
 
     return render_page(
-        '(~error-page :title title :message message :image image :asset-url "/static")',
+        '(~shared:pages/error-page :title title :message message :image image :asset-url "/static")',
         title=f"{errnum} Error",
         message=message,
         image=image,