支持访客实时输入草稿展示与联系方式自动识别

坐席输入框上方显示「对方正在输入」草稿；从草稿/消息提取手机微信邮箱QQ并追加入库，不覆盖已有联系方式。

server/internal/ws/ws.go

@@ -4,13 +4,25 @@ import (
 	"encoding/json"
 	"log"
 	"net/http"
+	"strings"
 	"sync"
 	"time"
+	"unicode/utf8"
 
 	"github.com/gorilla/websocket"
 	"kefu-cloud/server/internal/model"
 )
 
+// ProcessDraftContacts 由 handler 包注入，避免 ws ↔ handler 循环依赖。
+// tenantID, customerID, sessionID, draftText
+var ProcessDraftContacts func(tenantID, customerID, sessionID uint, text string)
+
+func processDraftContacts(tenantID, customerID, sessionID uint, text string) {
+	if ProcessDraftContacts != nil {
+		ProcessDraftContacts(tenantID, customerID, sessionID, text)
+	}
+}
+
 var upgrader = websocket.Upgrader{
 	CheckOrigin:  func(r *http.Request) bool { return true },
 	Subprotocols: []string{"kefu-v1", "kefu-visitor-v1"},
@@ -36,6 +48,8 @@ type Event struct {
 type ClientEvent struct {
 	Type      string `json:"type"`
 	SessionID uint   `json:"session_id"`
+	// Text 访客输入框草稿（type=input_draft 或 typing 附带）
+	Text string `json:"text,omitempty"`
 }
 
 type Hub struct {
@@ -166,8 +180,14 @@ func (h *Hub) BroadcastToSessionStaff(tenantID uint, agentID *uint, message []by
 	}
 }
 
+const maxDraftTextRunes = 500
+
 func handleClientEvent(client *Client, event ClientEvent) {
-	if event.Type != "typing" || event.SessionID == 0 {
+	if event.SessionID == 0 {
+		return
+	}
+	// typing：仅指示；input_draft：带正文草稿
+	if event.Type != "typing" && event.Type != "input_draft" {
 		return
 	}
 	var session model.Session
@@ -175,7 +195,7 @@ func handleClientEvent(client *Client, event ClientEvent) {
 		return
 	}
 
-	// 访客输入中 → 通知可接待的客服
+	// 访客输入中 / 草稿 → 通知坐席
 	if client.Kind == "visitor" {
 		if client.SessionID == nil || *client.SessionID != event.SessionID {
 			return
@@ -183,6 +203,34 @@ func handleClientEvent(client *Client, event ClientEvent) {
 		if session.Status == "ended" || session.Status == "archived" {
 			return
 		}
+
+		if event.Type == "input_draft" {
+			text := strings.TrimSpace(event.Text)
+			if utf8.RuneCountInString(text) > maxDraftTextRunes {
+				text = string([]rune(text)[:maxDraftTextRunes])
+			}
+			now := time.Now()
+			_ = model.DB.Model(&session).Updates(map[string]interface{}{
+				"draft_text":       text,
+				"draft_updated_at": now,
+			}).Error
+
+			// 异步提取联系方式（不阻塞 WS）
+			go processDraftContacts(session.TenantID, session.CustomerID, session.ID, text)
+
+			payload, err := NewEvent("input_draft", session.ID, map[string]interface{}{
+				"from": "visitor",
+				"text": text,
+			})
+			if err != nil {
+				return
+			}
+			// 排队中也让租户坐席能看到
+			DefaultHub.BroadcastToTenantStaff(session.TenantID, payload)
+			return
+		}
+
+		// 兼容旧 typing（无正文）
 		payload, err := NewEvent("typing", session.ID, map[string]string{"from": "visitor"})
 		if err != nil {
 			return
@@ -195,8 +243,8 @@ func handleClientEvent(client *Client, event ClientEvent) {
 		return
 	}
 
-	// 客服输入中 → 通知访客
-	if client.Kind != "agent" {
+	// 客服输入中 → 通知访客（不传草稿内容）
+	if client.Kind != "agent" || event.Type != "typing" {
 		return
 	}
 	if client.Role == "agent" && (session.AgentID == nil || *session.AgentID != client.UserID) {
@@ -217,7 +265,7 @@ func HandleWebSocket(client *Client) {
 		client.Conn.Close()
 	}()
 
-	client.Conn.SetReadLimit(1024)
+	client.Conn.SetReadLimit(4096) // 允许访客草稿正文
 	client.Conn.SetReadDeadline(time.Now().Add(60 * time.Second))
 	client.Conn.SetPongHandler(func(string) error {
 		client.Conn.SetReadDeadline(time.Now().Add(60 * time.Second))