Refactor: eliminate "special" entity type and use DID-based logic

Replace string-based entity type matching with DID-based logic for "You" and "Unnamed" entities. Treat these as regular person entities instead of special types.

- Remove "special" type from EntitySelectionEvent interface
- Update EntityGrid to emit "You" and "Unnamed" as person entities
- Simplify SpecialEntityCard emit structure (remove entityType parameter)
- Refactor GiftedDialog to process all person entities with DID-based logic
- Update ContactGiftingView and HomeView to use DID-based entity creation
- Remove string literals "You" and "Unnamed" from method signatures

src/components/SpecialEntityCard.vue

@@ -124,8 +124,6 @@ export default class SpecialEntityCard extends Vue {
   handleClick(): void {
     if (this.selectable && !this.conflicted) {
       this.emitEntitySelected({
-        type: "special",
-        entityType: this.entityType,
         data: this.entityData,
       });
     } else if (this.conflicted && this.notify) {
@@ -145,13 +143,7 @@ export default class SpecialEntityCard extends Vue {
   // Emit methods using @Emit decorator
 
   @Emit("entity-selected")
-  emitEntitySelected(data: {
-    type: string;
-    entityType: string;
-    data: { did?: string; name: string };
-  }): {
-    type: string;
-    entityType: string;
+  emitEntitySelected(data: { data: { did?: string; name: string } }): {
     data: { did?: string; name: string };
   } {
     return data;