fix(dolt): proper server mode support for routing and storage

- FindDatabasePath now handles Dolt server mode (no local dir required)
- main.go uses NewFromConfigWithOptions for Dolt to read server settings
- Routing uses factory via callback to respect backend configuration
- Handle Dolt "database exists" error (error 1007) gracefully

Previously, Dolt server mode failed because:
1. FindDatabasePath required a local directory to exist
2. main.go bypassed server mode config when creating Dolt storage
3. Routing always opened SQLite regardless of backend config

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/beads/beads.go

@@ -232,7 +232,11 @@ func findDatabaseInBeadsDir(beadsDir string, warnOnIssues bool) string {
 	if cfg, err := configfile.Load(beadsDir); err == nil && cfg != nil {
 		backend := cfg.GetBackend()
 		if backend == configfile.BackendDolt {
-			// For Dolt, check if the configured database directory exists
+			// For Dolt server mode, database is on the server - no local directory required
+			if cfg.IsDoltServerMode() {
+				return cfg.DatabasePath(beadsDir)
+			}
+			// For embedded Dolt, check if the configured database directory exists
 			doltPath := cfg.DatabasePath(beadsDir)
 			if info, err := os.Stat(doltPath); err == nil && info.IsDir() {
 				return doltPath

internal/routing/routes.go

@@ -425,12 +425,27 @@ func (rs *RoutedStorage) Close() error {
 	return nil
 }
 
+// StorageOpener is a function that opens storage for a given beads directory.
+// This allows callers to provide custom storage opening logic (e.g., using factory).
+type StorageOpener func(ctx context.Context, beadsDir string) (storage.Storage, error)
+
 // GetRoutedStorageForID returns a storage connection for the given issue ID.
+// If the ID matches a route, it opens a connection to the routed database using SQLite.
+// Otherwise, it returns nil (caller should use their existing storage).
+//
+// DEPRECATED: Use GetRoutedStorageWithOpener for proper backend support.
+// The caller is responsible for closing the returned RoutedStorage.
+func GetRoutedStorageForID(ctx context.Context, id, currentBeadsDir string) (*RoutedStorage, error) {
+	return GetRoutedStorageWithOpener(ctx, id, currentBeadsDir, nil)
+}
+
+// GetRoutedStorageWithOpener returns a storage connection for the given issue ID.
 // If the ID matches a route, it opens a connection to the routed database.
+// The opener function is used to create storage; if nil, defaults to SQLite.
 // Otherwise, it returns nil (caller should use their existing storage).
 //
 // The caller is responsible for closing the returned RoutedStorage.
-func GetRoutedStorageForID(ctx context.Context, id, currentBeadsDir string) (*RoutedStorage, error) {
+func GetRoutedStorageWithOpener(ctx context.Context, id, currentBeadsDir string, opener StorageOpener) (*RoutedStorage, error) {
 	beadsDir, routed, err := ResolveBeadsDirForID(ctx, id, currentBeadsDir)
 	if err != nil {
 		return nil, err
@@ -441,8 +456,14 @@ func GetRoutedStorageForID(ctx context.Context, id, currentBeadsDir string) (*Ro
 	}
 
 	// Open storage for the routed directory
-	dbPath := filepath.Join(beadsDir, "beads.db")
-	store, err := sqlite.New(ctx, dbPath)
+	var store storage.Storage
+	if opener != nil {
+		store, err = opener(ctx, beadsDir)
+	} else {
+		// Default to SQLite for backward compatibility
+		dbPath := filepath.Join(beadsDir, "beads.db")
+		store, err = sqlite.New(ctx, dbPath)
+	}
 	if err != nil {
 		return nil, err
 	}

internal/storage/dolt/store.go

@@ -312,8 +312,13 @@ func openServerConnection(ctx context.Context, cfg *Config) (*sql.DB, string, er
 
 	_, err = initDB.ExecContext(ctx, fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s", cfg.Database))
 	if err != nil {
-		_ = db.Close()
-		return nil, "", fmt.Errorf("failed to create database: %w", err)
+		// Dolt may return error 1007 even with IF NOT EXISTS - ignore if database already exists
+		errLower := strings.ToLower(err.Error())
+		if !strings.Contains(errLower, "database exists") && !strings.Contains(errLower, "1007") {
+			_ = db.Close()
+			return nil, "", fmt.Errorf("failed to create database: %w", err)
+		}
+		// Database already exists - that's fine, continue
 	}
 
 	return db, connStr, nil