refactor: distribute types from crm-types.ts to owning composables

Each composable now owns its types and exports them. Other composables
import types from the owning composable. Deleted centralized crm-types.ts.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/app/composables/useContactInboxes.ts

@@ -4,7 +4,20 @@ import {
   ContactInboxesQueryDocument,
   SetContactInboxHiddenDocument,
 } from "~~/graphql/generated";
-import type { ContactInbox } from "~/composables/crm-types";
+
+import type { CommItem } from "~/composables/useContacts";
+
+export type ContactInbox = {
+  id: string;
+  contactId: string;
+  contactName: string;
+  channel: CommItem["channel"];
+  sourceExternalId: string;
+  title: string;
+  isHidden: boolean;
+  lastMessageAt: string;
+  updatedAt: string;
+};
 
 export function useContactInboxes(opts: { apolloAuthReady: ComputedRef<boolean> }) {
   const { result: contactInboxesResult, refetch: refetchContactInboxes } = useQuery(