success pt. 11 add hooks and headers to make OPFS work

_headers

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+/*
+  # Enable cross-origin isolation (required for SharedArrayBuffer/Atomics),
+  # which sqlite-wasm OPFS persistence (e.g. sqlocal) depends on.
+  Cross-Origin-Opener-Policy: same-origin
+  Cross-Origin-Embedder-Policy: require-corp
+
+  # Optional but commonly paired with COOP/COEP.
+  Cross-Origin-Resource-Policy: same-origin

src/hooks.server.ts

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+import type { Handle } from "@sveltejs/kit";
+
+export const handle: Handle = async ({ event, resolve }) => {
+	const response = await resolve(event);
+
+	// https://sqlocal.dev/guide/setup#cross-origin-isolation
+	// Cross-origin isolation (needed for SharedArrayBuffer/Atomics -> sqlite-wasm OPFS)
+	response.headers.set("Cross-Origin-Opener-Policy", "same-origin");
+	response.headers.set("Cross-Origin-Embedder-Policy", "require-corp");
+
+	// Optional, but commonly paired
+	response.headers.set("Cross-Origin-Resource-Policy", "same-origin");
+
+	return response;
+};