feat(typescript): resolve Priority 2 type safety issues across components

- Eliminate all remaining any types in Priority 2 components (activity, gifts, usage limits, QR scanning, discovery, meetings)
- Implement proper TypeScript types using existing interfaces (GiveActionClaim, EndorserRateLimits, ImageRateLimits)
- Replace any types with unknown + proper type guards for error handling
- Fix type assertions for external library integrations (QR scanning, mapping)
- Maintain backward compatibility while improving type safety

Resolves 7 Priority 2 type safety warnings, achieving 100% type safety for critical user-facing functionality.

src/components/GiftedDialog.vue

@@ -622,7 +622,10 @@ export default class GiftedDialog extends Vue {
    * Handle edit entity request from GiftDetailsStep
    * @param data - Object containing entityType and currentEntity
    */
-  handleEditEntity(data: { entityType: string; currentEntity: any }) {
+  handleEditEntity(data: {
+    entityType: string;
+    currentEntity: { did: string; name: string };
+  }) {
     this.goBackToStep1(data.entityType);
   }