fix: folk-wrapper crash, service worker API exclusion, fal.ai endpoint

- folk-wrapper: createRenderRoot crashed because innerHTML="" removed the
  slot from DOM, making parentElement null on the next line. Save parent
  ref before clearing.

- sw.ts: module API paths (/space/module/api/...) weren't excluded from
  caching. Changed startsWith("/api/") to includes("/api/"). Also fixed
  catch handler returning undefined instead of a Response.

- image-gen: changed queue.fal.run to fal.run for synchronous responses.
  The queue endpoint returns request_id, not the actual image data.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/folk-wrapper.ts

@@ -292,11 +292,12 @@ export class FolkWrapper extends FolkShape {
 			<div class="tags"></div>
 		`;
 
-		// Replace existing content structure
+		// Replace existing content structure — save parent ref before clearing
 		const existingSlot = root.querySelector("slot");
-		if (existingSlot?.parentElement) {
-			existingSlot.parentElement.innerHTML = "";
-			existingSlot.parentElement.appendChild(wrapper);
+		const slotParent = existingSlot?.parentElement;
+		if (slotParent) {
+			slotParent.innerHTML = "";
+			slotParent.appendChild(wrapper);
 		}
 
 		// Get references

server/index.ts

@@ -533,7 +533,7 @@ app.post("/api/image-gen", async (c) => {
 	};
 	const styledPrompt = (stylePrompts[style] || "") + prompt;
 
-	const res = await fetch("https://queue.fal.run/fal-ai/flux-pro/v1.1", {
+	const res = await fetch("https://fal.run/fal-ai/flux-pro/v1.1", {
 		method: "POST",
 		headers: {
 			Authorization: `Key ${FAL_KEY}`,
@@ -567,7 +567,7 @@ app.post("/api/video-gen/t2v", async (c) => {
 	const { prompt, duration } = await c.req.json();
 	if (!prompt) return c.json({ error: "prompt required" }, 400);
 
-	const res = await fetch("https://queue.fal.run/fal-ai/wan/v2.1", {
+	const res = await fetch("https://fal.run/fal-ai/wan/v2.1", {
 		method: "POST",
 		headers: {
 			Authorization: `Key ${FAL_KEY}`,
@@ -600,7 +600,7 @@ app.post("/api/video-gen/i2v", async (c) => {
 	const { image, prompt, duration } = await c.req.json();
 	if (!image) return c.json({ error: "image required" }, 400);
 
-	const res = await fetch("https://queue.fal.run/fal-ai/kling-video/v1/standard/image-to-video", {
+	const res = await fetch("https://fal.run/fal-ai/kling-video/v1/standard/image-to-video", {
 		method: "POST",
 		headers: {
 			Authorization: `Key ${FAL_KEY}`,

website/sw.ts

@@ -40,12 +40,12 @@ self.addEventListener("fetch", (event) => {
 	// Skip non-http(s) schemes (chrome-extension://, etc.) — they can't be cached
 	if (!url.protocol.startsWith("http")) return;
 
-	// Skip WebSocket and API requests entirely
+	// Skip WebSocket and API requests entirely (including module APIs like /space/module/api/...)
 	if (
 		event.request.url.startsWith("ws://") ||
 		event.request.url.startsWith("wss://") ||
 		url.pathname.startsWith("/ws/") ||
-		url.pathname.startsWith("/api/")
+		url.pathname.includes("/api/")
 	) {
 		return;
 	}
@@ -101,7 +101,7 @@ self.addEventListener("fetch", (event) => {
 					}
 					return response;
 				})
-				.catch(() => cached as Response);
+				.catch(() => cached || new Response("Offline", { status: 503 }));
 			return cached || fetchPromise;
 		})
 	);