Fix build: remove unused imports, drop playSess img refs, cleanup state init

main.go

@@ -4,15 +4,12 @@ import (
 	"bufio"
 	"bytes"
 	"context"
-	"encoding/binary"
 	"encoding/json"
 	"errors"
 	"flag"
 	"fmt"
-	"image"
 	"image/color"
 	"image/png"
-	"io"
 	"math"
 	"net/url"
 	"os"
@@ -42,7 +39,6 @@ import (
 	"git.leaktechnologies.dev/stu/VT_Player/internal/queue"
 	"git.leaktechnologies.dev/stu/VT_Player/internal/ui"
 	"git.leaktechnologies.dev/stu/VT_Player/internal/utils"
-	"github.com/hajimehoshi/oto"
 )
 
 // Module describes a high level tool surface that gets a tile on the menu.
@@ -2034,7 +2030,6 @@ func runGUI() {
 	a.Settings().SetTheme(&ui.MonoTheme{})
 	logging.Debug(logging.CatUI, "created fyne app: %#v", a)
 	w := a.NewWindow("VT Player")
-	state.window = w
 	if icon := utils.LoadAppIcon(); icon != nil {
 		a.SetIcon(icon)
 		w.SetIcon(icon)
@@ -3948,21 +3943,6 @@ func (s *appState) showFrameManual(path string, img *canvas.Image) {
 }
 
 func (s *appState) captureCoverFromCurrent() (string, error) {
-	// If we have a play session active, capture the current playing frame
-	if s.playSess != nil && s.playSess.img != nil && s.playSess.img.Image != nil {
-		dest := filepath.Join(os.TempDir(), fmt.Sprintf("videotools-cover-%d.png", time.Now().UnixNano()))
-		f, err := os.Create(dest)
-		if err != nil {
-			return "", err
-		}
-		defer f.Close()
-		if err := png.Encode(f, s.playSess.img.Image); err != nil {
-			return "", err
-		}
-		return dest, nil
-	}
-
-	// Otherwise use the current preview frame
 	if s.currentFrame == "" {
 		return "", fmt.Errorf("no frame available")
 	}