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>

account/sx/layouts.sx

@@ -2,19 +2,19 @@
 ;; Registered via register_sx_layout("account", ...) in __init__.py.
 
 ;; Full page: root header + auth header row in header-child
-(defcomp ~account-layout-full ()
+(defcomp ~layouts/full ()
   (<> (~root-header-auto)
-    (~header-child-sx
+    (~shared:layout/header-child-sx
       :inner (~auth-header-row-auto))))
 
 ;; OOB (HTMX): auth row + root header, both with oob=true
-(defcomp ~account-layout-oob ()
+(defcomp ~layouts/oob ()
   (<> (~auth-header-row-auto true)
     (~root-header-auto true)))
 
 ;; Mobile menu: auth section + root nav
-(defcomp ~account-layout-mobile ()
-  (<> (~mobile-menu-section
+(defcomp ~layouts/mobile ()
+  (<> (~shared:layout/mobile-menu-section
         :label "account" :href "/" :level 1 :colour "sky"
         :items (~auth-nav-items-auto))
     (~root-mobile-auto)))