feat: add setting to customize chat log timestamp (#6338)

src/widgets/settingspages/ModerationPage.cpp

@@ -150,6 +150,21 @@ ModerationPage::ModerationPage()
                                            }).result());
             });
 
+        auto logsTimestampFormatLayout =
+            logs.emplace<QHBoxLayout>().withoutMargin();
+        auto logsTimestampFormatLabel =
+            logsTimestampFormatLayout.emplace<QLabel>();
+        logsTimestampFormatLabel->setText(
+            QString("Log file timestamp format: "));
+
+        QComboBox *logTimestampFormat = this->createComboBox(
+            {"Disable", "h:mm", "hh:mm", "h:mm a", "hh:mm a", "h:mm:ss",
+             "hh:mm:ss", "h:mm:ss a", "hh:mm:ss a", "h:mm:ss.zzz",
+             "h:mm:ss.zzz a", "hh:mm:ss.zzz", "hh:mm:ss.zzz a"},
+            getSettings()->logTimestampFormat);
+        logTimestampFormat->setToolTip("a = am/pm, zzz = milliseconds");
+        logsTimestampFormatLayout.append(logTimestampFormat);
+
         QCheckBox *onlyLogListedChannels =
             this->createCheckBox("Only log channels listed below",
                                  getSettings()->onlyLogListedChannels);