🤖 fix: resolve console errors for ORPC iterator and HelpIndicator ref (#985)

## Summary

Fixes two console errors that appear during normal operation:

### 1. React ref warning for HelpIndicator
```
Warning: Function components cannot be given refs. Attempts to access this ref will fail.
Check the render method of `Primitive.button.SlotClone`.
```

**Cause:** `HelpIndicator` was a plain function component used inside
`TooltipTrigger` with `asChild`, which needs to forward refs.

**Fix:** Converted to `React.forwardRef`.

### 2. ORPC Event Iterator Validation Failed
```
[WorkspaceStore] Error in onChat subscription for xxx: ORPCError: Event iterator validation failed
Caused by: ErrorEvent: An error event was received
```

**Cause:** When the underlying transport (WebSocket/MessagePort) has an
error during workspace removal, ORPC throws
`EVENT_ITERATOR_VALIDATION_FAILED` because the transport's `ErrorEvent`
can't be validated against the chat message schema.

**Fix:** Suppress this specific error only when the workspace has been
removed (race condition between server error and client cleanup). If the
workspace still exists and we get this error, it's logged as before
since that would indicate a real problem.

---
_Generated with `mux`_

Author: ammar-agent

src/browser/components/ui/tooltip.tsx

@@ -46,15 +46,17 @@ const TooltipContent = React.forwardRef<
 ));
 TooltipContent.displayName = TooltipPrimitive.Content.displayName;
 
-const HelpIndicator: React.FC<{ className?: string; children?: React.ReactNode }> = ({
-  className,
-  children,
-}) => (
+const HelpIndicator = React.forwardRef<
+  HTMLSpanElement,
+  { className?: string; children?: React.ReactNode }
+>(({ className, children }, ref) => (
   <span
+    ref={ref}
     className={cn("text-muted flex cursor-help items-center text-[10px] leading-none", className)}
   >
     {children}
   </span>
-);
+));
+HelpIndicator.displayName = "HelpIndicator";
 
 export { Tooltip, TooltipTrigger, TooltipContent, TooltipProvider, TooltipArrow, HelpIndicator };

src/browser/stores/WorkspaceStore.ts

@@ -713,12 +713,21 @@ export class WorkspaceStore {
             });
           }
         } catch (error) {
-          if (!signal.aborted) {
-            console.error(
-              `[WorkspaceStore] Error in onChat subscription for ${workspaceId}:`,
-              error
-            );
-          }
+          // Suppress errors when subscription was intentionally cleaned up
+          if (signal.aborted) return;
+
+          // EVENT_ITERATOR_VALIDATION_FAILED with ErrorEvent cause happens when:
+          // - The workspace was removed on server side (iterator ends with error)
+          // - Connection dropped (WebSocket/MessagePort error)
+          // Only suppress if workspace no longer exists (was removed during the race)
+          const isIteratorError =
+            error instanceof Error &&
+            "code" in error &&
+            error.code === "EVENT_ITERATOR_VALIDATION_FAILED";
+          const workspaceRemoved = !this.states.has(workspaceId);
+          if (isIteratorError && workspaceRemoved) return;
+
+          console.error(`[WorkspaceStore] Error in onChat subscription for ${workspaceId}:`, error);
         }
       })();