remove fileHandle from IDB if user rejects permission

src/actions/actionExport.tsx

@@ -150,11 +150,23 @@ export const actionSaveToActiveFile = register({
       if (error?.name !== "AbortError") {
         console.error(error);
       }
+
+      if (fileHandleExists && error.name === "AbortError") {
+        try {
+          await idb.del(IDB_KEYS.fileHandle);
+        } catch (error) {
+          console.error(error);
+        }
         return {
           commitToHistory: false,
           appState: { ...appState, fileHandle: null },
         };
       }
+
+      return {
+        commitToHistory: false,
+      };
+    }
   },
   keyTest: (event) =>
     event.key === KEYS.S && event[KEYS.CTRL_OR_CMD] && !event.shiftKey,