fix(compiler): route the generated api object through the real buildApiRequest

Root-cause fix for the fix-round-1 review: the inlined query/body
assembly in __wrnexusCallApi was a third, unguarded copy of
buildApiRequest's rules. Restore the import of buildApiRequest from
@wrnexus/core in the generated module and delete the inline copy.

The four api-block-ssr.test.ts tests (and three in compiler.test.ts)
that dynamically import a generated module from an OS tmpdir were
failing against a stale globally-installed @wrnexus/core (v0.8.8,
predates buildApiRequest) because that tmpdir has no node_modules of
its own and bare-specifier resolution walked out of the workspace.
Fixed at the source: symlink the workspace @wrnexus/core into each
tmpdir root before the dynamic import, the same way every in-repo
package already resolves it.

packages/compiler/test/compiler.test.ts

@@ -1,5 +1,5 @@
 import { test, expect } from "bun:test";
-import { writeFileSync, mkdirSync, mkdtempSync, rmSync } from "node:fs";
+import { writeFileSync, mkdirSync, mkdtempSync, rmSync, symlinkSync, existsSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { pathToFileURL } from "node:url";
@@ -7,6 +7,23 @@ import { generate, parse } from "../src/index.ts";
 import { compileWrnFile } from "../src/index.ts";
 import { mountHtml } from "@wrnexus/test";
 
+// The compiled module below is written to an OS tmpdir with no node_modules
+// of its own, so Node's bare-specifier resolution for "@wrnexus/core" would
+// otherwise walk up to whatever (possibly stale, globally-installed) copy
+// happens to sit outside the workspace. Symlink the workspace package in so
+// it resolves to the real, currently-built `@wrnexus/core` — the same one
+// every other package in this repo gets via its own
+// `node_modules/@wrnexus/core` symlink.
+const WORKSPACE_CORE = join(import.meta.dir, "../../core");
+
+function linkWorkspaceCore(root: string): void {
+  const scopeDir = join(root, "node_modules", "@wrnexus");
+  const linkPath = join(scopeDir, "core");
+  if (existsSync(linkPath)) return;
+  mkdirSync(scopeDir, { recursive: true });
+  symlinkSync(WORKSPACE_CORE, linkPath, process.platform === "win32" ? "junction" : "dir");
+}
+
 test("explicit static rendering disables hydration metadata", () => {
   const output = compileWrnFile(`page StaticPage {
     render = "static"
@@ -33,6 +50,7 @@ let seq = 0;
 async function compileAndImport(src: string): Promise<Record<string, unknown>> {
   const dir = join(tmpdir(), "wrn-compiler-test");
   mkdirSync(dir, { recursive: true });
+  linkWorkspaceCore(dir);
   const file = join(dir, `m${seq++}.ts`);
   writeFileSync(file, compileWrnFile(src));
   return import(pathToFileURL(file).href);
@@ -1351,6 +1369,7 @@ test("page state SSR condition renders without ReferenceError", async () => {
   const generatedFile = join(root, "pricing.generated.ts");
 
   try {
+    linkWorkspaceCore(root);
     const source = `
 page Pricing {
   state billingCycle = "monthly"