Fix chat panel token fetch: use /api/workspaces not URL slug

URL param 'mark-account' != workspace slug 'mark'. Fetch default token
from /api/workspaces?include_default_token=true which resolves the real
slug server-side.

Made-with: Cursor

components/vibn-chat/chat-panel.tsx

@@ -163,13 +163,14 @@ export function ChatPanel() {
     document.documentElement.style.setProperty("--chat-panel-width", open ? "380px" : "0px");
   }, [open]);
 
-  // Load MCP token — prefer localStorage cache, fetch from API if missing
+  // Load MCP token — prefer localStorage cache, fetch from API if missing.
+  // We use /api/workspaces (not the URL param) because the URL slug
+  // (e.g. "mark-account") differs from the actual workspace slug ("mark").
   useEffect(() => {
     if (!workspace || status !== "authenticated") return;
     const cached = localStorage.getItem(`vibn-mcp-token-${workspace}`);
     if (cached) { setMcpToken(cached); return; }
-    // Auto-fetch the workspace's default key (created at account setup)
-    fetch(`/api/workspaces/${workspace}/keys?include_default_token=true`)
+    fetch("/api/workspaces?include_default_token=true")
       .then((r) => r.ok ? r.json() : null)
       .then((d) => {
         if (d?.defaultToken) {
@@ -177,7 +178,7 @@ export function ChatPanel() {
           setMcpToken(d.defaultToken);
         }
       })
-      .catch(() => {/* silent — panel works in read-only mode */});
+      .catch(() => {});
   }, [workspace, status]);
 
   // Load threads