Hide benchmark indicator in Convert module when already applied

User feedback: Don't show benchmark status clutter when settings are already applied.

Changes:
- Only show benchmark indicator when settings are NOT applied
- Removes 'Benchmark: Applied' text + button from UI when active
- Cleaner Convert module interface when using benchmark settings

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

main.go

@@ -6297,12 +6297,10 @@ func buildConvertView(state *appState, src *videoSource) fyne.CanvasObject {
 			state.convert.EncoderPreset == preset &&
 			state.convert.HardwareAccel == benchHW
 
+		// Only show benchmark indicator if settings are NOT already applied
+		if !applied {
 			statusColor := utils.MustHex("#FFC857")
 			statusText := "Benchmark: Not Applied"
-		if applied {
-			statusColor = utils.MustHex("#4CE870")
-			statusText = "Benchmark: Applied"
-		}
 			benchmarkStatus = canvas.NewText(statusText, statusColor)
 			benchmarkStatus.TextStyle = fyne.TextStyle{Monospace: true, Bold: true}
 			benchmarkStatus.TextSize = 12
@@ -6314,14 +6312,11 @@ func buildConvertView(state *appState, src *videoSource) fyne.CanvasObject {
 				benchmarkStatus.Refresh()
 				benchmarkApplyBtn.Disable()
 			})
-		if applied {
-			benchmarkApplyBtn.Disable()
-		} else {
 			benchmarkApplyBtn.Importance = widget.MediumImportance
-		}
 
 			benchmarkIndicator = container.NewHBox(benchmarkStatus, benchmarkApplyBtn)
 		}
+	}
 
 	backBar := ui.TintedBar(convertColor, container.NewHBox(
 		back,