feat: add path-based community routing under subdomain namespaces

cca.rspace.online/campaign/demo now loads the campaign-demo community.
Path segments are joined with hyphens to derive the slug. Subdomain
acts as a brand namespace; root path still loads the subdomain slug.

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

server/index.ts

@@ -210,10 +210,24 @@ const server = Bun.serve<WSData>({
 		}
 
 		// Community canvas route (subdomain detected)
+		// Supports path-based slugs: cca.rspace.online/campaign/demo → slug "campaign-demo"
 		if (subdomain) {
-			const community = await loadCommunity(subdomain);
+			const pathSegments = url.pathname.split("/").filter(Boolean);
+
+			// Derive slug: path segments joined with "-", or subdomain if at root
+			const slug = pathSegments.length > 0 ? pathSegments.join("-") : subdomain;
+
+			const community = await loadCommunity(slug);
 			if (!community) {
-				return new Response("Community not found", { status: 404 });
+				// Path slug not found — fall back to subdomain slug if path was given
+				if (pathSegments.length > 0) {
+					const fallback = await loadCommunity(subdomain);
+					if (!fallback) {
+						return new Response("Community not found", { status: 404 });
+					}
+				} else {
+					return new Response("Community not found", { status: 404 });
+				}
 			}
 
 			// Serve canvas.html for community

website/canvas.html

@@ -343,11 +343,22 @@
 			FolkSocialPost.define();
 
 			// Get community info from URL
+			// Supports path-based slugs: cca.rspace.online/campaign/demo → slug "campaign-demo"
 			const hostname = window.location.hostname;
 			const subdomain = hostname.split(".")[0];
 			const isLocalhost = hostname === "localhost" || hostname === "127.0.0.1";
 			const urlParams = new URLSearchParams(window.location.search);
-			const communitySlug = urlParams.get("space") || (isLocalhost ? "demo" : subdomain);
+
+			const pathSegments = window.location.pathname.split("/").filter(Boolean);
+			const ignorePaths = ["canvas", "settings", "api"];
+			const cleanSegments = pathSegments.filter(s => !ignorePaths.includes(s));
+
+			let communitySlug = urlParams.get("space");
+			if (!communitySlug && cleanSegments.length > 0) {
+				communitySlug = cleanSegments.join("-");
+			} else if (!communitySlug) {
+				communitySlug = isLocalhost ? "demo" : subdomain;
+			}
 
 			// Update UI
 			document.getElementById("community-name").textContent = communitySlug;