chore: improve resource internal_path migrator (#2698)

* chore: improve internal path migrator
- handle mixed path styles
- handle Windows paths
- add tests

* chore: fix goimports error

test/store/migrator_test.go

@@ -0,0 +1,56 @@
+package teststore
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/usememos/memos/store"
+)
+
+func TestMigrateResourceInternalPath(t *testing.T) {
+	ctx := context.Background()
+	ts := NewTestingStore(ctx, t)
+	user, err := createTestingHostUser(ctx, ts)
+	require.NoError(t, err)
+
+	testCases := []map[string]string{
+		{
+			ts.Profile.Data + "/assets/test.jpg": "assets/test.jpg",
+		},
+		{
+			ts.Profile.Data + `\assets\test.jpg`: "assets/test.jpg",
+		},
+		{
+			"/unhandled/path/test.jpg": "/unhandled/path/test.jpg",
+		},
+		{
+			`C:\unhandled\path\assets\test.jpg`: `C:\unhandled\path\assets\test.jpg`,
+		},
+	}
+
+	for _, testCase := range testCases {
+		for input, expectedOutput := range testCase {
+			resourceCreate := &store.Resource{
+				CreatorID:    user.ID,
+				InternalPath: input,
+			}
+			createdResource, err := ts.CreateResource(ctx, resourceCreate)
+			require.NoError(t, err)
+
+			err = ts.MigrateResourceInternalPath(ctx)
+			require.NoError(t, err)
+
+			findResource := &store.FindResource{
+				ID: &createdResource.ID,
+			}
+			resource, err := ts.GetResource(ctx, findResource)
+			require.NoError(t, err)
+
+			require.Equal(t, expectedOutput, resource.InternalPath)
+		}
+	}
+
+	ts.Close()
+}