fix(ui): map legacy UI backend values to current equivalents in normalization

EvoScientist/cli/tui_runtime.py

@@ -9,6 +9,7 @@ from .tui_backends import RichStreamingBackend, StreamingTUIBackend
 
 DEFAULT_UI_BACKEND = "cli"
 SUPPORTED_UI_BACKENDS = ("cli", "tui")
+_LEGACY_BACKEND_MAP = {"textual": "tui", "rich": "cli"}
 
 
 def normalize_ui_backend(value: str | None) -> str:
@@ -16,6 +17,7 @@ def normalize_ui_backend(value: str | None) -> str:
     if not value:
         return DEFAULT_UI_BACKEND
     normalized = value.strip().lower()
+    normalized = _LEGACY_BACKEND_MAP.get(normalized, normalized)
     if normalized in SUPPORTED_UI_BACKENDS:
         return normalized
     return DEFAULT_UI_BACKEND

EvoScientist/config/onboard.py

@@ -483,10 +483,9 @@ def _step_ui_backend(config: EvoScientistConfig) -> str:
     ]
 
     # Map legacy values to current ones
-    default_backend = config.ui_backend
-    if default_backend == "textual":
-        default_backend = "tui"
-    elif default_backend not in ("tui", "cli"):
+    _legacy_map = {"textual": "tui", "rich": "cli"}
+    default_backend = _legacy_map.get(config.ui_backend, config.ui_backend)
+    if default_backend not in ("tui", "cli"):
         default_backend = "tui"
 
     backend = questionary.select(

tests/test_ui_runtime.py

@@ -16,6 +16,13 @@ def test_normalize_ui_backend_accepts_known_values():
     assert normalize_ui_backend("TUI") == "tui"
 
 
+def test_normalize_ui_backend_maps_legacy_values():
+    assert normalize_ui_backend("textual") == "tui"
+    assert normalize_ui_backend("Textual") == "tui"
+    assert normalize_ui_backend("rich") == "cli"
+    assert normalize_ui_backend("Rich") == "cli"
+
+
 def test_normalize_ui_backend_unknown_falls_back_to_cli():
     assert normalize_ui_backend("unknown-ui") == "cli"