Add leads handlers, WhatsApp integration, and test files

apps/go-crm/internal/handlers/clients.go

@@ -54,15 +54,21 @@ func ListClients(w http.ResponseWriter, r *http.Request) {
     </div>
     <table>
         <thead>
-            <tr><th>Name</th><th>Phone</th><th>Email</th><th>Actions</th></tr>
+            <tr><th>Name</th><th>Phone</th><th>WhatsApp</th><th>Actions</th></tr>
         </thead>
         <tbody id="clientList">
 `))
 	for _, c := range clients {
+		var whatsappCell string
+		if c.WhatsAppConnected == 1 && c.WhatsAppNumber != "" {
+			whatsappCell = c.WhatsAppNumber
+		} else {
+			whatsappCell = `<a href="/leads/connect?client_id=` + strconv.FormatInt(c.ClientID, 10) + `">Connect</a>`
+		}
 		w.Write([]byte(`<tr>
             <td>` + c.Name + `</td>
             <td>` + c.Phone + `</td>
-            <td>` + c.Email + `</td>
+            <td>` + whatsappCell + `</td>
             <td>
                 <a href="/clients/` + strconv.FormatInt(c.ClientID, 10) + `">View</a>
                 <button type="button" onclick="document.getElementById('editForm` + strconv.FormatInt(c.ClientID, 10) + `').style.display='block'">Edit</button>