Add checked React field bindings and Web Studio factories

Replace opaque props with checked generic presentation contracts and lazy typed
interface references. Generate readonly/writable field APIs and component checks.

Preserve CRDT editing through explicit resolved getter/setter contracts, binding-
fenced delta RPCs, native watches and replica-aware field adapters. Custom setters
retain semantic writes; storage snapshots never grant write authority. Cover
concurrent edits, lost acknowledgements, readonly contracts and authorization.

Add receiver-free static factory dispatch, state-field binding shorthand, and
conformance-based creation. Migrate TODO, editable scaffolds and authoring guides.
Verify language/codegen, SDK, RPC, browser lifecycle, local scaffolds, production
browser bundling and CRDT persistence with temporary PostgreSQL.

test/scaffold-recipes.test.ts

@@ -30,11 +30,9 @@ test("React preset applies its browser build script and shared-platform imports"
   assert.match(await fs.readFile(path.join(root, "flake.nix"), "utf8"), /browserSources = true/);
   assert.equal(await fs.readFile(path.join(root, "src/gen/web-studio-react-runtime.d.ts"), "utf8"), reactPlatformTypes);
   assert.match(await fs.readFile(path.join(root, "src/browser-assets.d.ts"), "utf8"), /declare module "\*\.css"/);
-  assert.equal(
-    JSON.parse(await fs.readFile(path.join(root, "quixos.check.json"), "utf8")).options.messages[
-      "org.quixos.web-studio.ReactProps"
-    ].export,
-    "opaqueReactPropsBinding",
+  assert.deepEqual(
+    JSON.parse(await fs.readFile(path.join(root, "quixos.check.json"), "utf8")).options.react.propsExports,
+    [],
   );
   await assert.rejects(fs.access(path.join(root, "quixos.scaffold.json")));
   assert.equal(