Make ticket pages open in T3 Code's file viewer, and show plans, mocks and progress inline in the thread

user/agents/skills/ticket/templates/site/site.js

@@ -1,4 +1,5 @@
-// Renderer for ticket and epic pages. Copied into .claude/docs/epics/_site/ by ticket-page.
+// Renderer for ticket and epic pages. ticket-page inlines it into every page shell, so a
+// page needs nothing outside its own folder (T3 Code's file viewer allows nothing else).
 // A page shell names its data file in <body data-src>. This script loads that file with a
 // <script> tag (file:// pages cannot fetch), re-loads it every two seconds, and redraws
 // only when the data changed. The data shape is defined in scripts/ticket-data.ts.