Enable drag-and-drop loading in filters and upscale

main.go

@@ -7397,6 +7397,84 @@ func (s *appState) handleDrop(pos fyne.Position, items []fyne.URI) {
 		return
 	}
 
+	// If in filters module, handle single video file
+	if s.active == "filters" {
+		var videoPaths []string
+		for _, uri := range items {
+			if uri.Scheme() != "file" {
+				continue
+			}
+			path := uri.Path()
+			if s.isVideoFile(path) {
+				videoPaths = append(videoPaths, path)
+			}
+		}
+
+		if len(videoPaths) == 0 {
+			logging.Debug(logging.CatUI, "no valid video files in dropped items")
+			dialog.ShowInformation("Filters", "No video files found in dropped items.", s.window)
+			return
+		}
+
+		go func() {
+			src, err := probeVideo(videoPaths[0])
+			if err != nil {
+				logging.Debug(logging.CatModule, "failed to load video for filters: %v", err)
+				fyne.CurrentApp().Driver().DoFromGoroutine(func() {
+					dialog.ShowError(fmt.Errorf("failed to load video: %w", err), s.window)
+				}, false)
+				return
+			}
+
+			fyne.CurrentApp().Driver().DoFromGoroutine(func() {
+				s.filtersFile = src
+				s.showFiltersView()
+				logging.Debug(logging.CatModule, "loaded video into filters module")
+			}, false)
+		}()
+
+		return
+	}
+
+	// If in upscale module, handle single video file
+	if s.active == "upscale" {
+		var videoPaths []string
+		for _, uri := range items {
+			if uri.Scheme() != "file" {
+				continue
+			}
+			path := uri.Path()
+			if s.isVideoFile(path) {
+				videoPaths = append(videoPaths, path)
+			}
+		}
+
+		if len(videoPaths) == 0 {
+			logging.Debug(logging.CatUI, "no valid video files in dropped items")
+			dialog.ShowInformation("Upscale", "No video files found in dropped items.", s.window)
+			return
+		}
+
+		go func() {
+			src, err := probeVideo(videoPaths[0])
+			if err != nil {
+				logging.Debug(logging.CatModule, "failed to load video for upscale: %v", err)
+				fyne.CurrentApp().Driver().DoFromGoroutine(func() {
+					dialog.ShowError(fmt.Errorf("failed to load video: %w", err), s.window)
+				}, false)
+				return
+			}
+
+			fyne.CurrentApp().Driver().DoFromGoroutine(func() {
+				s.upscaleFile = src
+				s.showUpscaleView()
+				logging.Debug(logging.CatModule, "loaded video into upscale module")
+			}, false)
+		}()
+
+		return
+	}
+
 	// If in merge module, handle multiple video files
 	if s.active == "merge" {
 		// Collect all video files from the dropped items