fix: resolve 3 real bugs found in PR review

- ConfigEditorDialog: wrap api.config.get() in try/catch to prevent
  dialog from getting stuck in loading state on IPC failure
- CreateTaskDialog: clear description and chips when dialog opens
  without defaults, preventing stale state from previous opens
- useAttachments: handle persistenceKey→undefined transition by
  flushing pending saves and clearing stale attachment state

src/renderer/components/settings/sections/ConfigEditorDialog.tsx

@@ -175,6 +175,7 @@ export const ConfigEditorDialog = ({
     setJsonError(null);
 
     const init = async (): Promise<void> => {
+      try {
         const config = await api.config.get();
         if (destroyed) return;
 
@@ -226,6 +227,11 @@ export const ConfigEditorDialog = ({
           });
           viewRef.current = view;
         });
+      } catch (e) {
+        if (destroyed) return;
+        setLoading(false);
+        setJsonError(e instanceof Error ? e.message : 'Failed to load config');
+      }
     };
 
     void init();

src/renderer/components/team/dialogs/CreateTaskDialog.tsx

@@ -102,6 +102,10 @@ export const CreateTaskDialog = ({
         descChipDraft.setChips([defaultChip]);
       } else if (defaultDescription) {
         descriptionDraft.setValue(defaultDescription);
+        descChipDraft.clearChipDraft();
+      } else {
+        descriptionDraft.clearDraft();
+        descChipDraft.clearChipDraft();
       }
       setOwner(defaultOwner);
       setBlockedBy([]);

src/renderer/hooks/useAttachments.ts

@@ -106,7 +106,14 @@ export function useAttachments(options?: UseAttachmentsOptions): UseAttachmentsR
 
   // Load persisted attachments on mount
   useEffect(() => {
-    if (!persistenceKey) return;
+    if (!persistenceKey) {
+      // Transitioning to non-persistent context: flush pending save and clear stale state
+      flushPending();
+      attachmentsRef.current = [];
+      // eslint-disable-next-line react-hooks/set-state-in-effect -- intentional sync reset on key transition
+      setAttachments([]);
+      return;
+    }
 
     let cancelled = false;
     // Flush any pending debounced save for the previous key before switching.