add encryption & decryption for the sensitive identity & mnemonic in SQL DB

src/components/DataExportSection.vue

@@ -62,7 +62,7 @@ backup and database export, with platform-specific download instructions. * *
 
 <script lang="ts">
 import { Component, Prop, Vue } from "vue-facing-decorator";
-import { NotificationIface } from "../constants/app";
+import { AppString, NotificationIface } from "../constants/app";
 import { db } from "../db/index";
 import { logger } from "../utils/logger";
 import { PlatformServiceFactory } from "../services/PlatformServiceFactory";
@@ -145,7 +145,7 @@ export default class DataExportSection extends Vue {
           return { value, key };
         },
       });
-      const fileName = `${db.name}-backup.json`;
+      const fileName = `${AppString.APP_NAME_NO_SPACES}-backup.json`;
 
       if (this.platformCapabilities.hasFileDownload) {
         // Web platform: Use download link
@@ -159,6 +159,8 @@ export default class DataExportSection extends Vue {
         // Native platform: Write to app directory
         const content = await blob.text();
         await this.platformService.writeAndShareFile(fileName, content);
+      } else {
+        throw new Error("This platform does not support file downloads.");
       }
 
       this.$notify(