feat: melhora visualizacao do historico de chat

- Remove fundo cinza/Card do historico de chat
- Agrupa sessoes por dia (Hoje, Ontem, data completa)
- Adiciona expansao/colapso por dia e por sessao
- Implementa paginacao de dias (5 por vez) e mensagens (20 por vez)
- Move historico para baixo da timeline (web e portal)

Estrutura escalavel para muitas interacoes de chat.

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

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

src/components/portal/portal-ticket-detail.tsx

@@ -505,7 +505,6 @@ export function PortalTicketDetail({ ticketId }: PortalTicketDetailProps) {
           <TicketCsatCard ticket={ticket} />
         </div>
       ) : null}
-      <TicketChatHistory ticketId={ticketId} />
       <div className="grid gap-6 lg:grid-cols-[minmax(0,2fr)_minmax(0,1fr)]">
         <Card className="rounded-2xl border border-slate-200 bg-white shadow-sm">
           <CardHeader className="flex flex-row items-center justify-between px-5 py-4">
@@ -685,6 +684,7 @@ export function PortalTicketDetail({ ticketId }: PortalTicketDetailProps) {
           </CardContent>
         </Card>
       </div>
+      <TicketChatHistory ticketId={ticketId} />
       <Dialog open={!!previewAttachment} onOpenChange={(open) => { if (!open) setPreviewAttachment(null) }}>
         <DialogContent className="max-w-3xl border border-slate-200 p-0">
           <DialogHeader className="relative px-4 py-3">

src/components/tickets/ticket-chat-history.tsx

@@ -1,13 +1,12 @@
 "use client"
 
-import { useState } from "react"
+import { useState, useMemo } from "react"
 import { useQuery, useAction } from "convex/react"
-import { formatDistanceToNow, format } from "date-fns"
+import { format, isToday, isYesterday, startOfDay } from "date-fns"
 import { ptBR } from "date-fns/locale"
 import { api } from "@/convex/_generated/api"
 import type { Id } from "@/convex/_generated/dataModel"
 import { useAuth } from "@/lib/auth-client"
-import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
 import { Button } from "@/components/ui/button"
 import { Spinner } from "@/components/ui/spinner"
 import { cn } from "@/lib/utils"
@@ -20,6 +19,7 @@ import {
   Download,
   FileText,
   Paperclip,
+  Calendar,
 } from "lucide-react"
 
 type ChatHistoryProps = {
@@ -52,7 +52,16 @@ type ChatSession = {
   messages: ChatMessage[]
 }
 
+type DayGroup = {
+  date: Date
+  dateKey: string
+  label: string
+  sessions: ChatSession[]
+  totalMessages: number
+}
+
 const MESSAGES_PER_PAGE = 20
+const DAYS_PER_PAGE = 5
 
 function formatDuration(minutes: number): string {
   if (minutes < 60) {
@@ -66,6 +75,16 @@ function formatDuration(minutes: number): string {
   return `${hours}h ${mins}min`
 }
 
+function formatDayLabel(date: Date): string {
+  if (isToday(date)) {
+    return "Hoje"
+  }
+  if (isYesterday(date)) {
+    return "Ontem"
+  }
+  return format(date, "dd 'de' MMMM 'de' yyyy", { locale: ptBR })
+}
+
 function MessageAttachmentPreview({ attachment }: { attachment: { storageId: string; name: string; type: string | null } }) {
   const getFileUrl = useAction(api.files.getUrl)
   const [loading, setLoading] = useState(false)
@@ -155,7 +174,7 @@ function ChatSessionCard({ session, isExpanded, onToggle }: { session: ChatSessi
               )}
             </div>
             <div className="flex items-center gap-2 text-xs text-slate-500">
-              <span>{format(session.startedAt, "dd/MM/yyyy 'as' HH:mm", { locale: ptBR })}</span>
+              <span>{format(session.startedAt, "HH:mm", { locale: ptBR })}</span>
               <span>-</span>
               <span>{session.messageCount} mensagens</span>
               <span>-</span>
@@ -255,9 +274,62 @@ function ChatSessionCard({ session, isExpanded, onToggle }: { session: ChatSessi
   )
 }
 
+function DayGroupCard({
+  dayGroup,
+  isExpanded,
+  onToggle,
+  expandedSessions,
+  onToggleSession
+}: {
+  dayGroup: DayGroup
+  isExpanded: boolean
+  onToggle: () => void
+  expandedSessions: Set<string>
+  onToggleSession: (sessionId: string) => void
+}) {
+  return (
+    <div className="space-y-2">
+      {/* Header do dia */}
+      <button
+        onClick={onToggle}
+        className="flex w-full items-center justify-between gap-3 rounded-lg px-3 py-2 text-left hover:bg-slate-50 transition-colors"
+      >
+        <div className="flex items-center gap-2">
+          <Calendar className="size-4 text-slate-400" />
+          <span className="text-sm font-medium text-slate-700">{dayGroup.label}</span>
+          <span className="text-xs text-slate-500">
+            ({dayGroup.sessions.length} {dayGroup.sessions.length === 1 ? "sessao" : "sessoes"} - {dayGroup.totalMessages} mensagens)
+          </span>
+        </div>
+        {isExpanded ? (
+          <ChevronDown className="size-4 text-slate-400" />
+        ) : (
+          <ChevronRight className="size-4 text-slate-400" />
+        )}
+      </button>
+
+      {/* Sessoes do dia */}
+      {isExpanded && (
+        <div className="space-y-2 pl-2">
+          {dayGroup.sessions.map((session) => (
+            <ChatSessionCard
+              key={session.sessionId}
+              session={session}
+              isExpanded={expandedSessions.has(session.sessionId)}
+              onToggle={() => onToggleSession(session.sessionId)}
+            />
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}
+
 export function TicketChatHistory({ ticketId }: ChatHistoryProps) {
   const { convexUserId } = useAuth()
+  const [expandedDays, setExpandedDays] = useState<Set<string>>(new Set())
   const [expandedSessions, setExpandedSessions] = useState<Set<string>>(new Set())
+  const [visibleDays, setVisibleDays] = useState(DAYS_PER_PAGE)
 
   const chatHistory = useQuery(
     api.liveChat.getTicketChatHistory,
@@ -266,6 +338,56 @@ export function TicketChatHistory({ ticketId }: ChatHistoryProps) {
       : "skip"
   )
 
+  // Agrupar sessoes por dia
+  const dayGroups = useMemo(() => {
+    if (!chatHistory?.sessions) return []
+
+    const groups = new Map<string, DayGroup>()
+
+    chatHistory.sessions.forEach((session: ChatSession) => {
+      const sessionDate = new Date(session.startedAt)
+      const dayStart = startOfDay(sessionDate)
+      const dateKey = dayStart.toISOString()
+
+      if (!groups.has(dateKey)) {
+        groups.set(dateKey, {
+          date: dayStart,
+          dateKey,
+          label: formatDayLabel(dayStart),
+          sessions: [],
+          totalMessages: 0,
+        })
+      }
+
+      const group = groups.get(dateKey)!
+      group.sessions.push(session)
+      group.totalMessages += session.messageCount
+    })
+
+    // Ordenar sessoes dentro de cada grupo por hora (mais recente primeiro)
+    groups.forEach((group) => {
+      group.sessions.sort((a, b) => b.startedAt - a.startedAt)
+    })
+
+    // Retornar grupos ordenados por data (mais recente primeiro)
+    return Array.from(groups.values()).sort((a, b) => b.date.getTime() - a.date.getTime())
+  }, [chatHistory?.sessions])
+
+  const displayedDays = dayGroups.slice(0, visibleDays)
+  const hasMoreDays = dayGroups.length > visibleDays
+
+  const toggleDay = (dateKey: string) => {
+    setExpandedDays((prev) => {
+      const next = new Set(prev)
+      if (next.has(dateKey)) {
+        next.delete(dateKey)
+      } else {
+        next.add(dateKey)
+      }
+      return next
+    })
+  }
+
   const toggleSession = (sessionId: string) => {
     setExpandedSessions((prev) => {
       const next = new Set(prev)
@@ -278,32 +400,50 @@ export function TicketChatHistory({ ticketId }: ChatHistoryProps) {
     })
   }
 
+  const loadMoreDays = () => {
+    setVisibleDays((prev) => prev + DAYS_PER_PAGE)
+  }
+
   // Nao mostrar se nao ha historico
   if (!chatHistory || chatHistory.sessions.length === 0) {
     return null
   }
 
   return (
-    <Card className="rounded-2xl border border-slate-200 bg-white shadow-sm">
-      <CardHeader className="border-b border-slate-100 bg-slate-50/50 px-4 py-3">
-        <CardTitle className="flex items-center gap-2 text-base font-semibold text-slate-900">
-          <MessageCircle className="size-4" />
-          Histórico de chat
-          <span className="ml-auto text-xs font-normal text-slate-500">
-            {chatHistory.sessions.length} {chatHistory.sessions.length === 1 ? "sessão" : "sessões"} - {chatHistory.totalMessages} mensagens
+    <div className="space-y-3">
+      {/* Header */}
+      <div className="flex items-center justify-between">
+        <div className="flex items-center gap-2">
+          <MessageCircle className="size-4 text-slate-500" />
+          <h3 className="text-sm font-semibold text-slate-900">Historico de chat</h3>
+        </div>
+        <span className="text-xs text-slate-500">
+          {chatHistory.sessions.length} {chatHistory.sessions.length === 1 ? "sessao" : "sessoes"} - {chatHistory.totalMessages} mensagens
         </span>
-        </CardTitle>
-      </CardHeader>
-      <CardContent className="p-4 space-y-3">
-        {chatHistory.sessions.map((session: ChatSession) => (
-          <ChatSessionCard
-            key={session.sessionId}
-            session={session}
-            isExpanded={expandedSessions.has(session.sessionId)}
-            onToggle={() => toggleSession(session.sessionId)}
+      </div>
+
+      {/* Grupos por dia */}
+      <div className="space-y-2">
+        {displayedDays.map((dayGroup) => (
+          <DayGroupCard
+            key={dayGroup.dateKey}
+            dayGroup={dayGroup}
+            isExpanded={expandedDays.has(dayGroup.dateKey)}
+            onToggle={() => toggleDay(dayGroup.dateKey)}
+            expandedSessions={expandedSessions}
+            onToggleSession={toggleSession}
           />
         ))}
-      </CardContent>
-    </Card>
+      </div>
+
+      {/* Carregar mais dias */}
+      {hasMoreDays && (
+        <div className="text-center pt-2">
+          <Button variant="ghost" size="sm" onClick={loadMoreDays}>
+            Carregar mais ({dayGroups.length - visibleDays} dias restantes)
+          </Button>
+        </div>
+      )}
+    </div>
   )
 }

src/components/tickets/ticket-detail-view.tsx

@@ -108,8 +108,8 @@ export function TicketDetailView({ id }: { id: string }) {
       <div className="grid gap-6 lg:grid-cols-[2fr_1fr]">
         <div className="space-y-6">
           <TicketComments ticket={ticket} />
-          <TicketChatHistory ticketId={id} />
           <TicketTimeline ticket={ticket} />
+          <TicketChatHistory ticketId={id} />
         </div>
         <TicketDetailsPanel ticket={ticket} />
       </div>