fix(rpubs): allow public PDF generation + fix zine auto-spawn

- Add publicWrite to rpubs module (PDF gen is computational, not a write)
- Fix zine auto-spawn: wait for community-sync-ready event instead of
  fragile 800ms timeout

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

modules/rpubs/mod.ts

@@ -350,6 +350,7 @@ export const pubsModule: RSpaceModule = {
 	description: "Drop in a document, get a pocket book",
 	scoping: { defaultScope: 'global', userConfigurable: true },
 	routes,
+	publicWrite: true,
 	standaloneDomain: "rpubs.online",
 	landingPage: renderLanding,
 	feeds: [

website/canvas.html

@@ -4425,14 +4425,21 @@
 			// Auto-spawn shape from ?tool= URL param (e.g. ?tool=folk-zine-gen)
 			const toolParam = urlParams.get("tool");
 			if (toolParam && shapeRegistry.has(toolParam)) {
-				// Wait for sync to initialize, then auto-place the shape
-				setTimeout(() => {
+				const spawnToolShape = () => {
 					newShape(toolParam);
-					// Clean up URL param without reload
 					const cleanUrl = new URL(window.location.href);
 					cleanUrl.searchParams.delete("tool");
 					history.replaceState(null, "", cleanUrl.pathname + cleanUrl.search);
-				}, 800);
+				};
+				// Wait for sync to be ready, or fallback after 2s
+				if (sync._connected) {
+					setTimeout(spawnToolShape, 100);
+				} else {
+					let spawned = false;
+					const onReady = () => { if (!spawned) { spawned = true; setTimeout(spawnToolShape, 100); } };
+					document.addEventListener("community-sync-ready", onReady, { once: true });
+					setTimeout(onReady, 2000); // fallback if sync never fires
+				}
 			}
 
 			// Feed shape — pull live data from another layer/module