Fix export test failures with ClearAllExportHashes for test isolation

Amp-Thread-ID: https://ampcode.com/threads/T-5335d274-44e1-4811-b63f-15c52ea3394f
Co-authored-by: Amp <amp@ampcode.com>

cmd/bd/export_test.go

@@ -117,6 +117,11 @@ func TestExportCommand(t *testing.T) {
 	t.Run("export includes labels", func(t *testing.T) {
 		exportPath := filepath.Join(tmpDir, "export_labels.jsonl")
 
+		// Clear export hashes to force re-export (test isolation)
+		if err := s.ClearAllExportHashes(ctx); err != nil {
+			t.Fatalf("Failed to clear export hashes: %v", err)
+		}
+
 		store = s
 		dbPath = testDB
 		exportCmd.Flags().Set("output", exportPath)
@@ -152,6 +157,11 @@ func TestExportCommand(t *testing.T) {
 	t.Run("export includes dependencies", func(t *testing.T) {
 		exportPath := filepath.Join(tmpDir, "export_deps.jsonl")
 
+		// Clear export hashes to force re-export (test isolation)
+		if err := s.ClearAllExportHashes(ctx); err != nil {
+			t.Fatalf("Failed to clear export hashes: %v", err)
+		}
+
 		store = s
 		dbPath = testDB
 		exportCmd.Flags().Set("output", exportPath)

internal/storage/sqlite/hash.go

@@ -71,3 +71,13 @@ func (s *SQLiteStorage) SetExportHash(ctx context.Context, issueID, contentHash
 	
 	return nil
 }
+
+// ClearAllExportHashes removes all export hashes from the database.
+// This is primarily used for test isolation to force re-export of issues.
+func (s *SQLiteStorage) ClearAllExportHashes(ctx context.Context) error {
+	_, err := s.db.ExecContext(ctx, `DELETE FROM export_hashes`)
+	if err != nil {
+		return fmt.Errorf("failed to clear export hashes: %w", err)
+	}
+	return nil
+}