Build Verse: a poem-quote app on the agent-native chat template

Adds a Postgres-backed quotes domain (poems/quotes/favorites) exposed as
five agent-native actions (list-quotes, get-random-quote, create-quote,
toggle-favorite, list-favorites) callable from both chat and the React UI
via useActionQuery/useActionMutation. Moves the primary UI from chat to a
mobile-first Quotes/Favorites experience (chat moves to /chat), adds
manual OpenTelemetry instrumentation exporting traces/metrics/logs over
OTLP, and wires a local Docker Postgres for shared state.

public/manifest.json

@@ -1,7 +1,7 @@
 {
-  "name": "App",
-  "short_name": "App",
-  "description": "Workspace app for App.",
+  "name": "Verse",
+  "short_name": "Verse",
+  "description": "Quotes drawn from poems — browse, search, and save your favorites.",
   "start_url": ".",
   "display": "standalone",
   "background_color": "#111111",