the frontend convention is panels.ts and layout.ts, not Router.tsx

The reference plugin named web/Router.tsx as the way to ship a frontend. Discovery checks for
web/panels.ts and web/layout.ts by those exact names and refuses a web/ directory missing either — so
anyone following the example would have written a plugin the platform rejects.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

manifest.ts

@@ -9,7 +9,8 @@ import type { PluginManifest } from '@@/plugins/manifest';
 //   api/router.ts      exports `router`; mounted at /api/example
 //   db/schema.ts       tables, if it had any (every name prefixed `example_`)
 //   sidecar/index.ts   a process, if it needed one (.mjs instead means node)
-//   web/Router.tsx     a frontend, if it had one
+//   web/panels.ts      panels, if it had a frontend — REQUIRED with web/, and checked by name
+//   web/layout.ts      how they are arranged — also required with web/
 //
 // `appName` is not declared anywhere: it is the directory name, so the id cannot disagree with where the
 // code sits.