refactor: remove Stemgedrag cohesie section and fallback axis message

- Remove voting discipline (cohesie) section from Political Compass tab
- Remove 'empirisch stempatroon zonder duidelijke ideologische richting' fallback message from axis classifier
- Clean up unused fallback template from _INTERPRETATION_TEMPLATES

analysis/axis_classifier.py

@@ -71,10 +71,6 @@ _INTERPRETATION_TEMPLATES = {
         "oppositiepartijen (r={r:.2f}). Ideologische tegenstellingen zijn minder dominant dit jaar."
     ),
     "pc": "De {orientation} as weerspiegelt de progressief-conservatieve tegenstelling.",
-    "fallback": (
-        "De {orientation} as weerspiegelt een empirisch stempatroon "
-        "zonder duidelijke ideologische richting."
-    ),
 }
 
 # Maps motion-path keyword labels to _INTERPRETATION_TEMPLATES keys.
@@ -459,7 +455,7 @@ def _assign_label(
         )
     return (
         fallback_label,
-        _INTERPRETATION_TEMPLATES["fallback"].format(orientation=orientation),
+        "",  # No interpretation for unclassified axes
         quality,
     )
 
@@ -617,14 +613,10 @@ def classify_axes(
         _x_fallback, _y_fallback = get_fallback_labels()
         if x_lbl is None:
             x_lbl = _x_fallback
-            x_int = _INTERPRETATION_TEMPLATES["fallback"].format(
-                orientation="horizontale"
-            )
+            x_int = ""  # No interpretation for unclassified axes
         if y_lbl is None:
             y_lbl = _y_fallback
-            y_int = _INTERPRETATION_TEMPLATES["fallback"].format(
-                orientation="verticale"
-            )
+            y_int = ""  # No interpretation for unclassified axes
 
         x_quality[wid] = x_q
         y_quality[wid] = y_q