Run modernise on the project

This will be available in "go fix" within Go 1.26 but in the meantime:

go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...

ui/widgets/albumfilterbutton.go

@@ -236,7 +236,7 @@ type GenreFilterSubsection struct {
 	genreList []string
 	onChanged func([]string)
 
-	selectedGenres      map[string]interface{}
+	selectedGenres      map[string]any
 	selectedGenresMutex sync.RWMutex
 
 	filterText         *widget.Entry
@@ -253,7 +253,7 @@ type GenreFilterSubsection struct {
 func NewGenreFilterSubsection(onChanged func([]string), initialSelectedGenres []string) *GenreFilterSubsection {
 	g := &GenreFilterSubsection{
 		onChanged:      onChanged,
-		selectedGenres: make(map[string]interface{}),
+		selectedGenres: make(map[string]any),
 	}
 	g.ExtendBaseWidget(g)