Unified messaging: Add back button to group info screen and open in same tab

packages/client/src/pages/messaging/messaging-room.vue

@@ -3,7 +3,6 @@
 		<template #header
 			><MkPageHeader
 				:actions="headerActions"
-				:tabs="headerTabs"
 				:display-back-button="true"
 		/></template>
 		<MkSpacer :content-max="900">
@@ -379,8 +378,6 @@ const headerActions = $computed(() => [
 	},
 ]);
 
-const headerTabs = $computed(() => []);
-
 definePageMetadata(
 	computed(() => ({
 		title: group != null ? group.name : user?.name ?? 'Chat',

packages/client/src/pages/my-groups/group.vue

@@ -1,6 +1,8 @@
 <template>
 	<MkStickyContainer>
-		<template #header><MkPageHeader :actions="headerActions" /></template>
+		<template #header><MkPageHeader
+			:actions="headerActions"
+			:display-back-button="true" /></template>
 		<div class="mk-group-page">
 			<div class="_section members _gap">
 				<div class="_content">