feat: skip two-way copy for cuda devices when decoding video wallpapers + cache wallpapers as blobs in new database

Helpers/Wallpapers.qml

@@ -27,7 +27,7 @@ Searcher {
 	property bool recentlyChanged
 	property bool showPreview: false
 
-	function getCategoryFor(w: FileSystemEntry): string {
+	function getCategoryFor(w: WallpaperEntry): string {
 		let category = w.parentDir.slice(Paths.wallsdir.length + 1);
 		if (category.includes("/"))
 			category = category.slice(0, category.indexOf("/"));
@@ -46,12 +46,12 @@ Searcher {
 	}
 
 	function thumbnailFor(path: string): string {
-		if (!isVideoPath(path))
-			return path;
+		if (!path)
+			return "";
 
 		for (const entry of root.list) {
-			if (entry.path === path && entry.thumbnailPath)
-				return entry.thumbnailPath;
+			if (entry.path === path)
+				return entry.thumbnailPath || path;
 		}
 
 		return path;
@@ -147,12 +147,13 @@ Searcher {
 		onTriggered: monitorCrops.writeAdapter()
 	}
 
-	FileSystemModel {
+	WallpaperDb {
 		id: wallpapers
 
-		filter: FileSystemModel.Media
+		dbPath: `${Paths.state}/wallpapers.sqlite`
+		cacheSize: wallpaper.largestBufferSize
+		requireHardwareCodec: true
 		path: Config.general.wallpaperPath
-		recursive: true
 	}
 
 	Process {
@@ -171,9 +172,19 @@ Searcher {
 	WallpaperService {
 		id: wallpaper
 
+		dbPath: wallpapers.dbPath
 		path: root.current
 	}
 
+	Connections {
+		target: wallpapers
+
+		function onCacheStored(path: string): void {
+			if (path === root.current)
+				wallpaper.invalidateCache();
+		}
+	}
+
 	Variants {
 		model: Quickshell.screens