fix(dev-server): normalize hot reload module paths

packages/dev-server/test/pipeline.test.ts

@@ -83,7 +83,7 @@ test("invalidateModule loads changed server modules without restarting the proce
   }
 });
 
-test("invalidateModule recompiles changed WRN files in-process", async () => {
+test("invalidateModule recompiles changed WRN files with watcher-normalized separators", async () => {
   const root = mkdtempSync(join(tmpdir(), "wrnexus-hmr-"));
   const file = join(root, "page.wrn");
   setCompileCacheDir(join(root, ".wrnexus"));
@@ -94,7 +94,7 @@ test("invalidateModule recompiles changed WRN files in-process", async () => {
     expect(String(first({}))).toContain("First");
 
     writeFileSync(file, "page Home { view { <h1>Second</h1> } }\n");
-    invalidateModule(file);
+    invalidateModule(file.replace(/\\/g, "/"));
     const second = (await loadModule(file)).default as (ctx: unknown) => unknown;
     expect(String(second({}))).toContain("Second");
   } finally {