Fix duplicate export declarations and migrate ContactsView with sub-components

- Remove duplicate NOTIFY_INVITE_MISSING and NOTIFY_INVITE_PROCESSING_ERROR exports
- Update InviteOneAcceptView.vue to use correct NOTIFY_INVITE_TRUNCATED_DATA constant
- Migrate ContactsView to PlatformServiceMixin and extract into modular sub-components
- Resolves TypeScript compilation errors preventing web build

src/components/LargeIdenticonModal.vue

@@ -0,0 +1,38 @@
+<template>
+  <div v-if="contact" class="fixed z-[100] top-0 inset-x-0 w-full">
+    <div
+      class="absolute inset-0 h-screen flex flex-col items-center justify-center bg-slate-900/50"
+    >
+      <EntityIcon
+        :contact="contact"
+        :icon-size="512"
+        class="flex w-11/12 max-w-sm mx-auto mb-3 overflow-hidden bg-white rounded-lg shadow-lg"
+        @click="$emit('close')"
+      />
+    </div>
+  </div>
+</template>
+
+<script lang="ts">
+import { Component, Vue, Prop } from "vue-facing-decorator";
+import EntityIcon from "./EntityIcon.vue";
+import { Contact } from "../db/tables/contacts";
+
+/**
+ * LargeIdenticonModal - Large identicon display modal
+ *
+ * Displays a contact's identicon in a large modal overlay.
+ * Clicking the identicon closes the modal.
+ *
+ * @author Matthew Raymer
+ */
+@Component({
+  name: "LargeIdenticonModal",
+  components: {
+    EntityIcon,
+  },
+})
+export default class LargeIdenticonModal extends Vue {
+  @Prop({ required: true }) contact!: Contact | undefined;
+}
+</script>