feat(android): implement file picker for data export

- Add @capawesome/capacitor-file-picker dependency
- Update DataExportSection UI text to reflect new file picker behavior
- Implement file picker in CapacitorPlatformService
- Add debug logging for path handling
- Fix logger to show messages in Capacitor environment

WIP: File path handling still needs refinement

src/components/DataExportSection.vue

@@ -45,16 +45,15 @@ backup and database export, with platform-specific download instructions. * *
           v-if="platformCapabilities.isIOS"
           class="list-disc list-outside ml-4"
         >
-          On iOS: Choose "More..." and select a place in iCloud, or go "Back"
-          and save to another location.
+          On iOS: You will be prompted to choose a location to save your backup
+          file.
         </li>
         <li
           v-if="platformCapabilities.isMobile && !platformCapabilities.isIOS"
           class="list-disc list-outside ml-4"
         >
-          On Android: Choose "Open" and then share
-          <font-awesome icon="share-nodes" class="fa-fw" />
-          to your prefered place.
+          On Android: You will be prompted to choose a location to save your
+          backup file.
         </li>
       </ul>
     </div>
@@ -156,7 +155,7 @@ export default class DataExportSection extends Vue {
           title: "Export Successful",
           text: this.platformCapabilities.hasFileDownload
             ? "See your downloads directory for the backup. It is in the Dexie format."
-            : "The backup has been saved to your device.",
+            : "Please choose a location to save your backup file.",
         },
         -1,
       );