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/ContactBulkActions.vue

@@ -0,0 +1,42 @@
+<template>
+  <div class="mt-2 w-full text-left">
+    <input
+      v-if="!showGiveNumbers"
+      type="checkbox"
+      :checked="allContactsSelected"
+      class="align-middle ml-2 h-6 w-6"
+      data-testId="contactCheckAllBottom"
+      @click="$emit('toggle-all-selection')"
+    />
+    <button
+      v-if="!showGiveNumbers"
+      :class="copyButtonClass"
+      :disabled="copyButtonDisabled"
+      @click="$emit('copy-selected')"
+    >
+      Copy
+    </button>
+  </div>
+</template>
+
+<script lang="ts">
+import { Component, Vue, Prop } from "vue-facing-decorator";
+
+/**
+ * ContactBulkActions - Contact bulk actions component
+ *
+ * Provides bulk selection controls at the bottom of the contact list.
+ * Handles copy operations for selected contacts.
+ *
+ * @author Matthew Raymer
+ */
+@Component({
+  name: "ContactBulkActions",
+})
+export default class ContactBulkActions extends Vue {
+  @Prop({ required: true }) showGiveNumbers!: boolean;
+  @Prop({ required: true }) allContactsSelected!: boolean;
+  @Prop({ required: true }) copyButtonClass!: string;
+  @Prop({ required: true }) copyButtonDisabled!: boolean;
+}
+</script>