Move remaining code to app module

There's still some stuff that could potentially go elsewhere but I think it's enough for now.

src/app/qml/NeochatMaximizeComponent.qml

@@ -0,0 +1,138 @@
+// SPDX-FileCopyrightText: 2023 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+import QtCore as Core
+import QtQuick
+import QtQuick.Controls as QQC2
+import QtQuick.Layouts
+import QtQuick.Dialogs as Dialogs
+import QtMultimedia
+
+import org.kde.kirigami as Kirigami
+import org.kde.kirigamiaddons.labs.components as Components
+
+import org.kde.neochat
+
+Components.AlbumMaximizeComponent {
+    id: root
+
+    /**
+     * @brief The current room that user is viewing.
+     */
+    required property NeoChatRoom currentRoom
+
+    readonly property string currentEventId: model.data(model.index(content.currentIndex, 0), TimelineMessageModel.EventIdRole)
+
+    readonly property var currentAuthor: model.data(model.index(content.currentIndex, 0), TimelineMessageModel.AuthorRole)
+
+    readonly property var currentTime: model.data(model.index(content.currentIndex, 0), TimelineMessageModel.TimeRole)
+
+    readonly property var currentProgressInfo: model.data(model.index(content.currentIndex, 0), TimelineMessageModel.ProgressInfoRole)
+
+    onCurrentProgressInfoChanged: () => {
+        if (root.currentProgressInfo) {
+            root.downloadAction.progress = root.currentProgressInfo.progress / root.currentProgressInfo.total * 100.0;
+        } else {
+            root.downloadAction.progress = 0;
+        }
+    }
+
+    /**
+     * @brief Whether the delegate is part of a thread timeline.
+     */
+    property bool isThread: false
+
+    downloadAction: Components.DownloadAction {
+        onTriggered: {
+            currentRoom.downloadFile(root.currentEventId, Core.StandardPaths.writableLocation(Core.StandardPaths.CacheLocation) + "/" + root.currentEventId.replace(":", "_").replace("/", "_").replace("+", "_") + currentRoom.fileNameToDownload(root.currentEventId));
+        }
+    }
+
+    playAction: Kirigami.Action {
+        onTriggered: {
+            MediaManager.startPlayback();
+            currentItem.play();
+        }
+    }
+
+    Connections {
+        target: MediaManager
+        function onPlaybackStarted() {
+            if (currentItem.playbackState === MediaPlayer.PlayingState) {
+                currentItem.pause();
+            }
+        }
+    }
+
+    Connections {
+        target: currentRoom
+
+        function onFileTransferProgress(id, progress, total) {
+            if (id == root.currentEventId) {
+                root.downloadAction.progress = progress / total * 100.0;
+            }
+        }
+    }
+
+    leading: RowLayout {
+        Components.Avatar {
+            id: userAvatar
+            implicitWidth: Kirigami.Units.iconSizes.medium
+            implicitHeight: Kirigami.Units.iconSizes.medium
+
+            name: root.currentAuthor.name ?? root.currentAuthor.displayName
+            source: root.currentAuthor.avatarUrl
+            color: root.currentAuthor.color
+        }
+        ColumnLayout {
+            spacing: 0
+            QQC2.Label {
+                id: userLabel
+
+                text: root.currentAuthor.name ?? root.currentAuthor.displayName
+                color: root.currentAuthor.color
+                font.weight: Font.Bold
+                elide: Text.ElideRight
+            }
+            QQC2.Label {
+                id: dateTimeLabel
+                text: root.currentTime.toLocaleString(Qt.locale(), Locale.ShortFormat)
+                color: Kirigami.Theme.disabledTextColor
+                elide: Text.ElideRight
+            }
+        }
+    }
+
+    onOpened: forceActiveFocus()
+
+    onItemRightClicked: RoomManager.viewEventMenu(root.currentEventId, root.currentRoom, root.currentAuthor)
+
+    onSaveItem: {
+        var dialog = saveAsDialog.createObject(QQC2.Overlay.overlay);
+        dialog.selectedFile = currentRoom.fileNameToDownload(root.currentEventId);
+        dialog.open();
+    }
+
+    Connections {
+        target: RoomManager
+        function onCloseFullScreen() {
+            root.close();
+        }
+    }
+
+    Component {
+        id: saveAsDialog
+        Dialogs.FileDialog {
+            fileMode: Dialogs.FileDialog.SaveFile
+            currentFolder: root.saveFolder
+            onAccepted: {
+                NeoChatConfig.lastSaveDirectory = currentFolder;
+                NeoChatConfig.save();
+                if (!selectedFile) {
+                    return;
+                }
+                currentRoom.downloadFile(root.currentEventId, selectedFile);
+            }
+        }
+    }
+}