Fix dropdown values in Marimo app

app.py

@@ -133,18 +133,14 @@ def _():
 @app.cell
 def _(RUN_LABELS, RUN_ORDER, mo):
     run_select = mo.ui.dropdown(
-        options={RUN_LABELS[key]: key for key in RUN_ORDER},
-        value="joint_three_modality",
+        options=[RUN_LABELS[key] for key in RUN_ORDER],
+        value=RUN_LABELS["joint_three_modality"],
         label="Training data",
         full_width=True,
     )
     domain_select = mo.ui.dropdown(
-        options={
-            "MANC FIB-SEM": "flyem_fibsem",
-            "FAFB ssTEM": "fafb_sstem",
-            "FlyLICONN": "flyliconn",
-        },
-        value="flyem_fibsem",
+        options=["MANC FIB-SEM", "FAFB ssTEM", "FlyLICONN"],
+        value="MANC FIB-SEM",
         label="Validation modality focus",
         full_width=True,
     )
@@ -153,7 +149,8 @@ def _(RUN_LABELS, RUN_ORDER, mo):
 
 @app.cell
 def _(RUN_LABELS, RUN_ORDER, domain_select, mo, run_select):
-    current = run_select.value
+    label_to_run = {RUN_LABELS[key]: key for key in RUN_ORDER}
+    current = label_to_run[run_select.value]
     idx = RUN_ORDER.index(current)
     prev_label = RUN_LABELS[RUN_ORDER[idx - 1]] if idx > 0 else "start"
     next_label = RUN_LABELS[RUN_ORDER[idx + 1]] if idx < len(RUN_ORDER) - 1 else "end"