feat(frontend): rename inj roles to sys-front-*, add sys-svc-cdn, cache-busting lookup

Introduce sys-svc-cdn (cdn_paths/cdn_urls/cdn_dirs) and ensure CDN directories + latest symlink.

Rename sys-srv-web-inj-* → sys-front-inj-*; update includes/templates; serve shared/per-app CSS & JS via CDN.

Add lookup_plugins/local_mtime_qs.py for mtime-based cache busting; split CSS into default.css/bootstrap.css + optional per-app style.css.

CSP: use style-src-elem; drop unsafe-inline for styles. Services: fix SYS_SERVICE_ALL_ENABLED bool and controlled flush.

BREAKING CHANGE: role names changed; replace includes and references accordingly.

Conversation: https://chatgpt.com/share/68b55494-9ec4-800f-b559-44707029141d

roles/categories.yml

@@ -56,6 +56,16 @@ roles:
       description: "Stack levels to setup the server"
       icon: "fas fa-bars-staggered"
       invokable: false
+    front:
+      title: "System Frontend Helpers"
+      description: "Frontend helpers for reverse-proxied apps (injection, shared assets, CDN plumbing)."
+      icon: "fas fa-wand-magic-sparkles"
+      invokable: false
+      inj:
+        title: "Injection"
+        description: "Composable HTML injection roles (CSS, JS, logout interceptor, analytics, desktop iframe) for Nginx/OpenResty via sub_filter/Lua with CDN-backed assets."
+        icon: "fas fa-filter"
+        invokable: false
   update:
     title: "Updates & Package Management"
     description: "OS & package updates"
@@ -106,11 +116,6 @@ roles:
     description: "General server roles for provisioning and managing server infrastructure—covering web servers, proxy servers, network services, and other backend components."
     icon: "fas fa-server"
     invokable: false
-    web:
-      title: "Webserver"
-      description: "Web-server roles for installing and configuring Nginx (core, TLS, injection filters, composer modules)."
-      icon: "fas fa-server"
-      invokable: false
     proxy:
       title: "Proxy Server"
       description: "Proxy-server roles for virtual-host orchestration and reverse-proxy setups."