feat(studio): add thirteen presets and preview reviewed proposals

packages/design-studio/README.md

@@ -75,4 +75,15 @@ Run `bun run scripts/evaluate-design-agents.ts` for the six-page/twelve-preview
 
 ## Installed packages and upgrades
 
+The preset and comparison menus offer 13 starting systems: Square, Soft, Angular,
+Swiss, Forest, Ocean, Rose, Violet, Ember, Editorial, Terminal, Brutalist and
+Contrast. Each has light and dark modes and uses the existing component contracts.
+The original three engine presets and existing saved drafts retain their formats.
+Create new seeds an editable design from the selected preset (Swiss when none is selected).
+
+Generation automatically previews the first valid proposal in the large preview.
+Reviewing another proposal switches that preview and labels it as an unchanged
+draft review. Use **Show current draft** to return, or **Use reviewed proposal**
+to save the design as an undoable draft revision. Export/apply remains separate.
+
 The staged package ships an installed `wrnexus-design-studio` binary, a prebuilt browser client and explicit server/agent subpaths. MCP consumes Studio as an optional peer. See [RELEASE.md](RELEASE.md) for installed usage, verified shared design bundles, upgrade planning, migrations, recovery and the release gate. The new package/upgrade APIs are programmatic; existing Studio authoring controls and APIs remain available.