fix(compiler): reserve api as a runtime binding to avoid client-scope collision

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

packages/compiler/src/client-codegen.ts

@@ -61,6 +61,7 @@ const RUNTIME_BINDINGS = new Set([
   "server",
   "props",
   "refs",
+  "api",
   "event",
   "payload",
 ]);

packages/compiler/test/api-block-codegen.test.ts

@@ -80,3 +80,31 @@ test("a block without an error section still emits its response body", () => {
   expect(generated).toContain("plainUsers");
   expect(generated).toContain("data.users");
 });
+
+test("a state field named api does not collide with the emitted api object", () => {
+  const generated = generateTargets(
+    parse(`page Repro {
+  state {
+    api = ""
+  }
+
+  client {
+${BLOCK}
+  }
+
+  functions {
+    client async function run(): Promise<void> {
+      const users = await api.searchUsers({ name: "Ajay" })
+      console.log(users)
+    }
+  }
+
+  view { <main><button @click="run()">go</button></main> }
+}
+`),
+  ).browser;
+
+  expect(() => {
+    new Function(generated.replace(/^\s*import[^\n]*$/gm, "").replace(/\bexport\s+/g, ""));
+  }).not.toThrow();
+});