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>

blog/sx/handlers/link-card.sx

@@ -11,7 +11,7 @@
         (let ((post (query "blog" "post-by-slug" :slug (trim s))))
           (when post
             (<> (str "<!-- fragment:" (trim s) " -->")
-                (~link-card
+                (~shared:fragments/link-card
                   :link (app-url "blog" (str "/" (get post "slug") "/"))
                   :title (get post "title")
                   :image (get post "feature_image")
@@ -22,7 +22,7 @@
     (when slug
       (let ((post (query "blog" "post-by-slug" :slug slug)))
         (when post
-          (~link-card
+          (~shared:fragments/link-card
             :link (app-url "blog" (str "/" (get post "slug") "/"))
             :title (get post "title")
             :image (get post "feature_image")