Corrige badge de mensagens nao lidas no chat web e desktop

- Web: markChatRead agora zera unreadByAgent na sessao ativa
- Desktop: usa unreadCount do backend ao inves de calcular localmente
- Backend: listMachineMessages retorna unreadCount da sessao
- Centraliza colunas da tabela de tickets do dispositivo

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

convex/liveChat.ts

@@ -467,7 +467,7 @@ export const listMachineMessages = query({
       .first()
 
     if (!session) {
-      return { messages: [], hasSession: false }
+      return { messages: [], hasSession: false, unreadCount: 0 }
     }
 
     // Aplicar limite (máximo 100 mensagens por chamada)
@@ -505,7 +505,7 @@ export const listMachineMessages = query({
       }
     })
 
-    return { messages: result, hasSession: true }
+    return { messages: result, hasSession: true, unreadCount: session.unreadByMachine ?? 0 }
   },
 })
 

convex/tickets.ts

@@ -3438,6 +3438,18 @@ export const markChatRead = mutation({
         updatedAt: now,
       })
     }
+
+    // Zerar contador de nao lidas pelo agente na sessao ativa
+    const session = await ctx.db
+      .query("liveChatSessions")
+      .withIndex("by_ticket", (q) => q.eq("ticketId", ticketId))
+      .filter((q) => q.eq(q.field("status"), "ACTIVE"))
+      .first()
+
+    if (session) {
+      await ctx.db.patch(session._id, { unreadByAgent: 0 })
+    }
+
     return { ok: true }
   },
 })