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/sys-front-inj-css/tasks/01_core.yml

@@ -0,0 +1,21 @@
+- name: Include dependency 'srv-core'
+  include_role:
+    name: srv-core
+  when: run_once_srv_core is not defined
+
+- name: Generate color palette with colorscheme-generator
+  set_fact:
+    color_palette: "{{ lookup('colorscheme', CSS_BASE_COLOR, count=CSS_COUNT, shades=CSS_SHADES) }}"
+
+- name: Generate inverted color palette with colorscheme-generator
+  set_fact:
+    inverted_color_palette: "{{ lookup('colorscheme', CSS_BASE_COLOR, count=CSS_COUNT, shades=CSS_SHADES, invert_lightness=True) }}"
+
+- name: Deploy default CSS files
+  template:
+    src:    "{{ ['css', item ~ '.j2'] | path_join }}"
+    dest:   "{{ [cdn.shared.css, item] | path_join }}"
+    owner:  "{{ NGINX.USER }}"
+    group:  "{{ NGINX.USER }}"
+    mode:   '0644'
+  loop: "{{ CSS_FILES }}"