feat: remove CommunicationsQuery, load messages on-demand only

- Remove bulk CommunicationsQuery from useContacts (was loading ALL
  messages for ALL contacts on init)
- Rebuild commThreads from contacts + contactInboxes using the new
  lastMessageText field from Phase 1
- Per-contact messages now load on-demand via getClientTimeline
- Remove commItems from useWorkspaceRouting, use clientTimelineItems

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

frontend/app/components/workspace/CrmWorkspaceApp.vue

@@ -95,7 +95,6 @@ const {
 // ---------------------------------------------------------------------------
 const {
   contacts,
-  commItems,
   contactSearch,
   selectedChannel,
   sortMode,
@@ -110,7 +109,6 @@ const {
   markAvatarBroken,
   contactInitials,
   refetchContacts,
-  refetchCommunications,
 } = useContacts({ apolloAuthReady });
 
 // ---------------------------------------------------------------------------
@@ -301,7 +299,6 @@ const {
 async function refetchAllCrmQueries() {
   await Promise.all([
     refetchContacts(),
-    refetchCommunications(),
     refetchContactInboxes(),
     refetchCalendar(),
     refetchDeals(),
@@ -461,59 +458,36 @@ const pilotHeaderPhrases = [
 const pilotHeaderText = ref("Every step moves you forward");
 
 // ---------------------------------------------------------------------------
-// Comm Threads (glue: contacts + commItems + contactInboxes)
+// Comm Threads (glue: contacts + contactInboxes — no bulk message loading)
 // ---------------------------------------------------------------------------
 const commThreads = computed(() => {
-  const sorted = [...commItems.value].sort((a, b) => a.at.localeCompare(b.at));
-  const map = new Map<string, CommItem[]>();
-  for (const item of sorted) {
-    if (!map.has(item.contact)) map.set(item.contact, []);
-    map.get(item.contact)?.push(item);
-  }
-
-  const contactById = new Map(contacts.value.map((contact) => [contact.id, contact]));
   const inboxesByContactId = new Map<string, ContactInbox[]>();
   for (const inbox of contactInboxes.value) {
     if (!inboxesByContactId.has(inbox.contactId)) inboxesByContactId.set(inbox.contactId, []);
-    inboxesByContactId.get(inbox.contactId)?.push(inbox);
+    inboxesByContactId.get(inbox.contactId)!.push(inbox);
   }
 
-  const contactIds = new Set<string>([
-    ...contacts.value.map((contact) => contact.id),
-    ...contactInboxes.value.map((inbox) => inbox.contactId),
-  ]);
-
-  return [...contactIds]
-    .map((contactId) => {
-      const contact = contactById.get(contactId);
-      const inboxes = inboxesByContactId.get(contactId) ?? [];
-      const contactName = contact?.name ?? inboxes[0]?.contactName ?? "";
-      const items = map.get(contactName) ?? [];
-      const last = items[items.length - 1];
+  return contacts.value
+    .map((c) => {
+      const inboxes = inboxesByContactId.get(c.id) ?? [];
       const channels = [
         ...new Set([
-          ...(contact?.channels ?? []),
-          ...inboxes.map((inbox) => inbox.channel),
-          ...items.map((item) => item.channel),
+          ...c.channels,
+          ...inboxes.map((i) => i.channel),
         ]),
       ] as CommItem["channel"][];
-      const inboxFallbackLast = inboxes
-        .map((inbox) => inbox.lastMessageAt || inbox.updatedAt)
-        .filter(Boolean)
-        .sort()
-        .at(-1);
 
       return {
-        id: contactId,
-        contact: contactName,
-        avatar: contact?.avatar ?? "",
+        id: c.id,
+        contact: c.name,
+        avatar: c.avatar,
         channels,
-        lastAt: last?.at ?? contact?.lastContactAt ?? inboxFallbackLast ?? "",
-        lastText: last?.text ?? "No messages yet",
-        items,
+        lastAt: c.lastContactAt,
+        lastText: c.lastMessageText || "No messages yet",
+        items: [] as CommItem[],
       };
     })
-    .filter((thread) => thread.contact)
+    .filter((t) => t.contact)
     .sort((a, b) => b.lastAt.localeCompare(a.lastAt));
 });
 
@@ -722,7 +696,7 @@ const routing = useWorkspaceRouting({
   commThreads,
   contacts,
   deals,
-  commItems,
+  clientTimelineItems,
   activeChangeMessage,
   activeChangeItem,
   activeChangeItems,
@@ -958,8 +932,9 @@ const selectedContactEvents = computed(() => {
 
 const selectedContactRecentMessages = computed(() => {
   if (!selectedContact.value) return [];
-  return commItems.value
-    .filter((item) => item.contact === selectedContact.value?.name && item.kind === "message")
+  return clientTimelineItems.value
+    .filter((entry) => entry.contentType === "message" && entry.message)
+    .map((entry) => entry.message!)
     .sort((a, b) => b.at.localeCompare(a.at))
     .slice(0, 8);
 });