fix: map docker host library paths

internal/service/media_test.go

@@ -0,0 +1,42 @@
+package service
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestResolveAccessibleLibraryPathMapsConfiguredHostMediaDir(t *testing.T) {
+	root := t.TempDir()
+	hostRoot := filepath.Join(root, "nas", "moviepilot-v2", "media")
+	containerRoot := filepath.Join(root, "container", "media")
+	containerLibrary := filepath.Join(containerRoot, "电视剧", "国产剧")
+	if err := os.MkdirAll(containerLibrary, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("MEDIASTATION_MEDIA_DIR", hostRoot)
+	t.Setenv("MEDIASTATION_MEDIA_CONTAINER_DIR", containerRoot)
+
+	got, err := resolveAccessibleLibraryPath(filepath.Join(hostRoot, "电视剧", "国产剧"))
+	if err != nil {
+		t.Fatalf("resolveAccessibleLibraryPath() error = %v", err)
+	}
+	if got != filepath.Clean(containerLibrary) {
+		t.Fatalf("resolveAccessibleLibraryPath() = %q, want %q", got, filepath.Clean(containerLibrary))
+	}
+}
+
+func TestResolveAccessibleLibraryPathKeepsAccessibleContainerPath(t *testing.T) {
+	containerLibrary := filepath.Join(t.TempDir(), "media", "电影")
+	if err := os.MkdirAll(containerLibrary, 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := resolveAccessibleLibraryPath(containerLibrary)
+	if err != nil {
+		t.Fatalf("resolveAccessibleLibraryPath() error = %v", err)
+	}
+	if got != filepath.Clean(containerLibrary) {
+		t.Fatalf("resolveAccessibleLibraryPath() = %q, want %q", got, filepath.Clean(containerLibrary))
+	}
+}