feat: Complete code integration of modules (#18)

The complete code integration is done.

Co-authored-by: Sagnik <sagnik7896@gmail.com>
Reviewed-on: #18

app/src/hooks/useCrmBootstrap.ts

@@ -0,0 +1,46 @@
+import { useEffect } from 'react';
+
+import { getChatLogs, getLeads } from '@/lib/api';
+import { mapLeadRecordToStoreLead } from '@/lib/crmMappers';
+import { useStore } from '@/store/useStore';
+import type { ChatMessage } from '@/types';
+
+export function useCrmBootstrap() {
+  const { setLeads, replaceMessages } = useStore();
+
+  useEffect(() => {
+    let cancelled = false;
+    const hydrate = async () => {
+      try {
+        const leads = await getLeads();
+        if (cancelled) return;
+        setLeads(leads.map(mapLeadRecordToStoreLead));
+
+        const messageEntries = await Promise.all(
+          leads.slice(0, 25).map(async (lead) => {
+            const logs = await getChatLogs(lead.id);
+            return [
+              lead.id,
+              logs.map((log): ChatMessage => ({
+                id: log.id,
+                sender: log.sender === 'lead' ? 'user' : 'oracle',
+                content: log.content,
+                timestamp: new Date(log.created_at ?? Date.now()),
+              })),
+            ] as const;
+          }),
+        );
+        if (!cancelled) {
+          replaceMessages(Object.fromEntries(messageEntries));
+        }
+      } catch {
+        // Keep the current in-app fallback state if the CRM backend is unreachable.
+      }
+    };
+
+    void hydrate();
+    return () => {
+      cancelled = true;
+    };
+  }, [replaceMessages, setLeads]);
+}