AI desktop page: strip unpicked optional sections like the skill does

The merged AI desktop page check filled the no-AI template directly and hit
{{CHECKPOINTS_JSON}}. It now runs sections.py with none picked first. No-AI step 6
names the sections.py run, and the AI skill says how its desktop and web paths get
the checkpoint, admin and login sections.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

rpa-dashboard-no-ai/SKILL.md

@@ -89,6 +89,8 @@ to answer.
    - Web: put it in the backend's static folder. With no backend yet, use
      `dashboard/dashboard.html`.
    - Existing frontend: put it where `templates/frontend.md` section 3 says.
+
+   Then run `python templates/sections.py <copied dashboard.html> <chosen sections>` (step 5).
 2. Fill every `{{...}}` placeholder:
 
    | Placeholder | Value |