chore: align srcDir=app structure (assets, composables, stores, plugins, pages) and prepare for correct alias resolution

server/api/fixtures.get.ts

@@ -1,10 +1,8 @@
-import { defineEventHandler } from 'h3'
-import { useFixtureIO } from '#imports'
+import { defineEventHandler } from "h3";
+import { useFixtureIO } from "~/composables/useFixtureIO";
 
 export default defineEventHandler(() => {
   // Export snapshot of in-memory state
-  const { exportAll } = useFixtureIO()
-  return exportAll()
-})
-
-
+  const { exportAll } = useFixtureIO();
+  return exportAll();
+});