fix(chat): use proper section details data

It prevents `StatusChatInput::enabled` property to be changed when
switching sections, as a consequence the text is persisted.

fixes: #10286

ui/app/AppLayouts/Chat/stores/RootStore.qml

@@ -33,6 +33,7 @@ QtObject {
     // Each `ChatLayout` has its own chatCommunitySectionModule
     // (on the backend chat and community sections share the same module since they are actually the same)
     property var chatCommunitySectionModule
+    readonly property var sectionDetails: _d.sectionDetailsInstantiator.count ? _d.sectionDetailsInstantiator.objectAt(0) : null
 
     property var communityItemsModel: chatCommunitySectionModule.model
 
@@ -658,4 +659,24 @@ QtObject {
             root.goToMembershipRequestsPage()
         }
     }
+
+    readonly property QtObject _d: QtObject {
+        readonly property var sectionDetailsInstantiator: Instantiator {
+            model: SortFilterProxyModel {
+                sourceModel: mainModuleInst.sectionsModel
+                filters: ValueFilter {
+                    roleName: "id"
+                    value: chatCommunitySectionModule.getMySectionId()
+                }
+            }
+            delegate: QtObject {
+                readonly property string id: model.id
+                readonly property int sectionType: model.sectionType
+                readonly property string name: model.name
+                readonly property bool joined: model.joined
+                readonly property bool amIBanned: model.amIBanned
+                // add others when needed..
+            }
+        }
+    }
 }

ui/app/AppLayouts/Chat/views/ChatContentView.qml

@@ -58,9 +58,6 @@ ColumnLayout {
 
     property bool stickersLoaded: false
 
-    // FIXME: this should be section data related only to that view, not the active one
-    readonly property var activeSectionData: rootStore.mainModuleInst ? rootStore.mainModuleInst.activeSection || {} : {}
-
     onIsActiveChannelChanged: {
         if (isActiveChannel) {
             chatInput.forceInputActiveFocus();
@@ -183,7 +180,7 @@ ColumnLayout {
                 anchors.fill: parent
                 anchors.margins: Style.current.smallPadding
 
-                enabled: root.activeSectionData.joined && !root.activeSectionData.amIBanned &&
+                enabled: root.rootStore.sectionDetails.joined && !root.rootStore.sectionDetails.amIBanned &&
                          !(chatType === Constants.chatType.oneToOne && !root.isUserAdded)
 
                 store: root.rootStore
@@ -204,7 +201,7 @@ ColumnLayout {
                 }
 
                 Binding on chatInputPlaceholder {
-                    when: !root.activeSectionData.joined || root.activeSectionData.amIBanned
+                    when: !root.rootStore.sectionDetails.joined || root.rootStore.sectionDetails.amIBanned
                     value: qsTr("You need to join this community to send messages")
                 }