fix(dashboard): prevent stale desc-save indicator when requests overlap

handleSaveDesc and handleAutoDescribe both set their loading flag in a
try block but always cleared it unconditionally in finally. When a user
opened profile A's description editor, clicked Save, then quickly
switched to profile B's editor and saved, profile A's resolving request
would clear descSaving/describing while profile B's request was still
in-flight, making the "Saving…" indicator disappear prematurely.

Track concurrent in-flight counts with descSavingCount and
describingCount refs (mirrors the existing activeDescRequest guard
pattern). The loading flag is cleared only when the counter reaches
zero, i.e. all overlapping requests have settled.

web/src/pages/ProfilesPage.tsx

@@ -333,6 +333,10 @@ export default function ProfilesPage() {
   // Tracks the latest description request (save / auto-describe) so a late
   // response can't overwrite state for a different, newly-opened editor.
   const activeDescRequest = useRef<string | null>(null);
+  // Counts in-flight save / auto-describe requests so the saving indicator
+  // is only cleared when the last concurrent request settles.
+  const descSavingCount = useRef(0);
+  const describingCount = useRef(0);
 
   // Inline model editor state
   const [editingModelFor, setEditingModelFor] = useState<string | null>(null);
@@ -551,6 +555,7 @@ export default function ProfilesPage() {
   );
 
   const handleSaveDesc = async (name: string) => {
+    descSavingCount.current += 1;
     setDescSaving(true);
     activeDescRequest.current = name;
     try {
@@ -577,11 +582,13 @@ export default function ProfilesPage() {
         showToast(`${t.status.error}: ${e}`, "error");
       }
     } finally {
-      setDescSaving(false);
+      descSavingCount.current -= 1;
+      if (descSavingCount.current === 0) setDescSaving(false);
     }
   };
 
   const handleAutoDescribe = async (name: string) => {
+    describingCount.current += 1;
     setDescribing(true);
     activeDescRequest.current = name;
     try {
@@ -609,7 +616,8 @@ export default function ProfilesPage() {
         showToast(`${t.status.error}: ${e}`, "error");
       }
     } finally {
-      setDescribing(false);
+      describingCount.current -= 1;
+      if (describingCount.current === 0) setDescribing(false);
     }
   };