feat: renumber lib reference into 4-pillar anatomy

Renumber the 15 reference docs into pillar groups (recipe -> anatomy):
- 01 Build Recipe (entry), 02 Composition Root
- domains: 10 Layering Rules
- contract: 20 Spec-First Routing, 21 CRUD Template, 22 Auth Integration
- interfaces/infra: 30 Infra Adapters
- UI: 40 UI: Auto-Rendered Admin & Custom Pages (new; @aetoskia packages,
  client template, x- catalog via react-openapi MCP module)
- pipelines: 50 Pipeline Scaffold, 51 Worker & Progress, 52 Human-in-the-Loop
- delivery/meta: 90 Drone Pipelines, 91 Versioning & Changelog,
  92 Genericity Matrix, 93 Library Registry, 94 Repository Inventory

MCP module names are unchanged (NN_ prefix stripped); all cross-references
(wiki, templates, hooks, registry) updated; lib index rewritten pillar-first;
build recipe bootstraps the client template. Bundle + HTML sites regenerated.

standards/mcp/nav.json

@@ -4,16 +4,16 @@
     "resource": "docs://modules/build_recipe",
     "title": "Build Recipe"
   },
-  {
-    "module": "layering_rules",
-    "resource": "docs://modules/layering_rules",
-    "title": "Layering Rules"
-  },
   {
     "module": "composition_root",
     "resource": "docs://modules/composition_root",
     "title": "Composition Root"
   },
+  {
+    "module": "layering_rules",
+    "resource": "docs://modules/layering_rules",
+    "title": "Layering Rules"
+  },
   {
     "module": "spec_first_routing",
     "resource": "docs://modules/spec_first_routing",
@@ -24,6 +24,21 @@
     "resource": "docs://modules/crud_template",
     "title": "CRUD Template"
   },
+  {
+    "module": "auth_integration",
+    "resource": "docs://modules/auth_integration",
+    "title": "Auth Integration"
+  },
+  {
+    "module": "infra_adaptors",
+    "resource": "docs://modules/infra_adaptors",
+    "title": "Infra Adapters"
+  },
+  {
+    "module": "ui_admin",
+    "resource": "docs://modules/ui_admin",
+    "title": "UI: Auto-Rendered Admin & Custom Pages"
+  },
   {
     "module": "pipeline_scaffold",
     "resource": "docs://modules/pipeline_scaffold",
@@ -39,11 +54,6 @@
     "resource": "docs://modules/human_in_loop",
     "title": "Human-in-the-Loop"
   },
-  {
-    "module": "infra_adaptors",
-    "resource": "docs://modules/infra_adaptors",
-    "title": "Infra Adapters"
-  },
   {
     "module": "drone_pipelines",
     "resource": "docs://modules/drone_pipelines",
@@ -64,11 +74,6 @@
     "resource": "docs://modules/library_registry",
     "title": "Library Registry"
   },
-  {
-    "module": "auth_integration",
-    "resource": "docs://modules/auth_integration",
-    "title": "Auth Integration"
-  },
   {
     "module": "repository_inventory",
     "resource": "docs://modules/repository_inventory",