fix: store digital-human upload text in files, slim jsonb for list

Avoid pulling multi-MB result payloads on uploads?view=summary over remote DB, which caused 30s client timeouts and HTTP 500.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/application/service/resumable_upload_material_test.go

@@ -0,0 +1,66 @@
+package service
+
+import (
+	"context"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/Tencent/WeKnora/internal/resumable"
+	"github.com/Tencent/WeKnora/internal/types"
+	"github.com/stretchr/testify/require"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+func TestResolveDigitalHumanUploadSourcePrefersMaterialThenLegacyThenReparse(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(filepath.Join(t.TempDir(), "mat.db")), &gorm.Config{Logger: logger.Default.LogMode(logger.Silent)})
+	require.NoError(t, err)
+	sqlDB, err := db.DB()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+	require.NoError(t, db.AutoMigrate(&resumable.Upload{}))
+	root := t.TempDir()
+	uploads, err := resumable.NewService(db, root, func(context.Context, string, string) error { return nil },
+		func(ctx context.Context, _ *resumable.Upload) (context.Context, error) { return ctx, nil },
+		func(context.Context, *resumable.Upload, string) (int64, types.JSON, bool, error) {
+			return 0, nil, true, nil
+		})
+	require.NoError(t, err)
+	humans := &DigitalHumanService{}
+
+	row := &resumable.Upload{
+		ID: "u1", Name: "note.txt", Size: 11, Kind: "digital-human",
+		State: "completed", ExpiresAt: time.Now().Add(time.Hour),
+		Result: types.JSON(`{"selection":"full","source":{"name":"note.txt"}}`),
+	}
+	require.NoError(t, os.WriteFile(uploads.FilePath(row.ID), []byte("from-upload"), 0600))
+
+	// 1) material file wins
+	require.NoError(t, uploads.SaveMaterial(row.ID, types.DigitalHumanSource{Name: "note.txt", Text: "from-material"}))
+	source, err := resolveDigitalHumanUploadSource(context.Background(), humans, uploads, row, uploadResult{Selection: "full", Source: &types.DigitalHumanSource{Name: "note.txt"}})
+	require.NoError(t, err)
+	require.Equal(t, "from-material", source.Text)
+
+	// 2) legacy jsonb text when material missing
+	require.NoError(t, os.Remove(filepath.Join(root, row.ID+".material")))
+	legacy := uploadResult{Selection: "full", Source: &types.DigitalHumanSource{Name: "note.txt", Text: "from-jsonb"}}
+	source, err = resolveDigitalHumanUploadSource(context.Background(), humans, uploads, row, legacy)
+	require.NoError(t, err)
+	require.Equal(t, "from-jsonb", source.Text)
+
+	// 3) reparse upload and backfill material
+	source, err = resolveDigitalHumanUploadSource(context.Background(), humans, uploads, row, uploadResult{Selection: "full", Source: &types.DigitalHumanSource{Name: "note.txt"}})
+	require.NoError(t, err)
+	require.Equal(t, "from-upload", source.Text)
+	loaded, err := uploads.LoadMaterial(row.ID)
+	require.NoError(t, err)
+	require.Equal(t, "from-upload", loaded.Text)
+
+	meta, err := json.Marshal(uploadResult{Selection: "full", Source: &types.DigitalHumanSource{Name: "note.txt"}})
+	require.NoError(t, err)
+	require.NotContains(t, string(meta), "from-upload")
+}