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>

sx/content/pages.py

@@ -322,7 +322,7 @@ HEADER_DETAILS: dict[str, dict] = {
             "reducing response size. This is the component caching protocol."
         ),
         "example": (
-            ';; Client sends: SX-Components: ~card,~nav-link,~footer\n'
+            ';; Client sends: SX-Components: ~card,~shared:layout/nav-link,~footer\n'
             ';; Server omits those defcomps from the response.\n'
             ';; Only new/changed components are sent.\n'
             '(response\n'