refactor: deduplicate FindJSONLInDir function (bd-8a5)

Extract shared JSONL file discovery logic to internal/utils/path.go.
Both autoimport and beads packages now use this shared implementation.

Changes:
- Add utils.FindJSONLInDir with common logic
- Update autoimport.go to use utils.FindJSONLInDir
- Update beads.go to delegate to utils.FindJSONLInDir
- Update server_export_import_auto.go to use utils.FindJSONLInDir
- Move FindJSONLInDir test to utils/path_test.go
- Fix pre-existing duplicate countIssuesInJSONLFile in init.go

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/autoimport/autoimport.go

@@ -15,6 +15,7 @@ import (
 	"github.com/steveyegge/beads/internal/debug"
 	"github.com/steveyegge/beads/internal/storage"
 	"github.com/steveyegge/beads/internal/types"
+	"github.com/steveyegge/beads/internal/utils"
 )
 
 // Notifier handles user notifications during import
@@ -65,9 +66,9 @@ func AutoImportIfNewer(ctx context.Context, store storage.Storage, dbPath string
 		notify = NewStderrNotifier(debug.Enabled())
 	}
 
-	// Find JSONL using database directory (same logic as beads.FindJSONLPath)
+	// Find JSONL using database directory
 	dbDir := filepath.Dir(dbPath)
-	jsonlPath := FindJSONLInDir(dbDir)
+	jsonlPath := utils.FindJSONLInDir(dbDir)
 	if jsonlPath == "" {
 		notify.Debugf("auto-import skipped, JSONL not found")
 		return nil
@@ -282,7 +283,7 @@ func CheckStaleness(ctx context.Context, store storage.Storage, dbPath string) (
 
 	// Find JSONL using database directory
 	dbDir := filepath.Dir(dbPath)
-	jsonlPath := FindJSONLInDir(dbDir)
+	jsonlPath := utils.FindJSONLInDir(dbDir)
 
 	stat, err := os.Stat(jsonlPath)
 	if err != nil {
@@ -297,46 +298,3 @@ func CheckStaleness(ctx context.Context, store storage.Storage, dbPath string) (
 	return stat.ModTime().After(lastImportTime), nil
 }
 
-// FindJSONLInDir finds the JSONL file in the given directory.
-// It prefers issues.jsonl over other .jsonl files to prevent accidentally
-// reading/writing to deletions.jsonl or merge artifacts (bd-tqo fix).
-// Always returns a path (defaults to issues.jsonl if nothing suitable found).
-func FindJSONLInDir(dbDir string) string {
-	pattern := filepath.Join(dbDir, "*.jsonl")
-	matches, err := filepath.Glob(pattern)
-	if err != nil || len(matches) == 0 {
-		// Default to issues.jsonl if glob fails or no matches
-		return filepath.Join(dbDir, "issues.jsonl")
-	}
-
-	// Prefer issues.jsonl over other .jsonl files (bd-tqo fix)
-	// This prevents accidentally using deletions.jsonl or merge artifacts
-	for _, match := range matches {
-		if filepath.Base(match) == "issues.jsonl" {
-			return match
-		}
-	}
-
-	// Fall back to beads.jsonl for legacy support
-	for _, match := range matches {
-		if filepath.Base(match) == "beads.jsonl" {
-			return match
-		}
-	}
-
-	// Last resort: use first match (but skip deletions.jsonl and merge artifacts)
-	for _, match := range matches {
-		base := filepath.Base(match)
-		// Skip deletions manifest and merge artifacts
-		if base == "deletions.jsonl" ||
-			base == "beads.base.jsonl" ||
-			base == "beads.left.jsonl" ||
-			base == "beads.right.jsonl" {
-			continue
-		}
-		return match
-	}
-
-	// If only deletions/merge files exist, default to issues.jsonl
-	return filepath.Join(dbDir, "issues.jsonl")
-}

internal/autoimport/autoimport_test.go

@@ -518,78 +518,3 @@ func TestStderrNotifier(t *testing.T) {
 	})
 }
 
-// TestFindJSONLInDir tests that FindJSONLInDir correctly prefers issues.jsonl
-// and avoids deletions.jsonl and merge artifacts (bd-tqo fix)
-func TestFindJSONLInDir(t *testing.T) {
-	tests := []struct {
-		name     string
-		files    []string
-		expected string
-	}{
-		{
-			name:     "only issues.jsonl",
-			files:    []string{"issues.jsonl"},
-			expected: "issues.jsonl",
-		},
-		{
-			name:     "issues.jsonl and deletions.jsonl - prefers issues",
-			files:    []string{"deletions.jsonl", "issues.jsonl"},
-			expected: "issues.jsonl",
-		},
-		{
-			name:     "issues.jsonl with merge artifacts - prefers issues",
-			files:    []string{"beads.base.jsonl", "beads.left.jsonl", "beads.right.jsonl", "issues.jsonl"},
-			expected: "issues.jsonl",
-		},
-		{
-			name:     "beads.jsonl as legacy fallback",
-			files:    []string{"beads.jsonl"},
-			expected: "beads.jsonl",
-		},
-		{
-			name:     "issues.jsonl preferred over beads.jsonl",
-			files:    []string{"beads.jsonl", "issues.jsonl"},
-			expected: "issues.jsonl",
-		},
-		{
-			name:     "only deletions.jsonl - returns default issues.jsonl",
-			files:    []string{"deletions.jsonl"},
-			expected: "issues.jsonl",
-		},
-		{
-			name:     "only merge artifacts - returns default issues.jsonl",
-			files:    []string{"beads.base.jsonl", "beads.left.jsonl", "beads.right.jsonl"},
-			expected: "issues.jsonl",
-		},
-		{
-			name:     "no files - returns default issues.jsonl",
-			files:    []string{},
-			expected: "issues.jsonl",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			tmpDir, err := os.MkdirTemp("", "bd-findjsonl-test-*")
-			if err != nil {
-				t.Fatal(err)
-			}
-			defer os.RemoveAll(tmpDir)
-
-			// Create test files
-			for _, file := range tt.files {
-				path := filepath.Join(tmpDir, file)
-				if err := os.WriteFile(path, []byte("{}"), 0644); err != nil {
-					t.Fatal(err)
-				}
-			}
-
-			result := FindJSONLInDir(tmpDir)
-			got := filepath.Base(result)
-
-			if got != tt.expected {
-				t.Errorf("FindJSONLInDir() = %q, want %q", got, tt.expected)
-			}
-		})
-	}
-}