feat: Added chat when MySQL is in use

chat.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"database/sql"
 	"fmt"
 	"strings"
 	"time"
@@ -157,6 +158,7 @@ func (a *App) GetOnlineOperators() ([]ChatPresence, error) {
 func (a *App) chatLoop() {
 	defer func() { _ = recover() }()
 	var lastID int64 = -1 // -1 = not yet baselined
+	var lastDB *sql.DB    // logbook the baseline belongs to
 	lastPresence := time.Time{}
 	lastPurge := time.Time{}
 	t := time.NewTicker(chatPollInterval)
@@ -164,8 +166,15 @@ func (a *App) chatLoop() {
 	for range t.C {
 		if !a.chatActive() {
 			lastID = -1 // re-baseline if the backend changes
+			lastDB = nil
 			continue
 		}
+		// Profile switch swaps the logbook under us: re-baseline against the new
+		// DB so we don't query it with the previous log's id cursor.
+		if a.logDb != lastDB {
+			lastID = -1
+			lastDB = a.logDb
+		}
 		if err := a.ensureChatTables(); err != nil {
 			continue
 		}