fix(dev-server): preserve serialized object component props

packages/dev-server/src/runtime.ts

@@ -1746,7 +1746,15 @@ export function createHandlers(deps: RuntimeDeps): Handlers {
         // component defaults creates the real child boundary; the bridged prop
         // binding synchronizes the live value when the branch is instantiated.
         for (const [key, value] of Object.entries(props)) {
-          if (/^\{[\s\S]*\}$/.test(value) && !/^\{t:/.test(value)) delete props[key];
+          if (/^\{[\s\S]*\}$/.test(value) && !/^\{t:/.test(value)) {
+            // SSR object props also start/end with braces. Preserve serialized
+            // JSON; only unresolved expressions should fall back to defaults.
+            try {
+              JSON.parse(value);
+            } catch {
+              delete props[key];
+            }
+          }
         }
         if (normalizedName === "languageswitcher" && deps.i18n) {
           props.locales ??= JSON.stringify(