fix: SVD tab now uses raw SVD values for ALL components 1-10

Previously, components 1-2 in the SVD tab used Procrustes-aligned PCA
coordinates (from load_positions), which meant the SVD tab showed PCA
dimensions of the 50D aligned space rather than the actual raw SVD
components. This was a fundamental inconsistency — the SVD tab's component 2
showed completely different party ordering than the raw SVD component 2.

Changes:
- explorer.py: Unified all components 1-10 to use raw SVD values via
  load_party_axis_scores_for_window(). Removed the separate
  load_positions() path for components 1-2. Now all components use the
  same data source (50D vectors from svd_vectors table).
- explorer.py: Updated flip computation to cover ALL components 1-10
  (was range 3-11 for components 3-10 only). The compute_flip_direction
  function correctly determines sign for each component.
- explorer.py: Unified rendering to always use _render_party_axis_chart_1d
  (was _render_party_axis_chart for components 1-2 using 2D coords).
- explorer.py: Unified trajectory to always use load_party_scores_all_windows.
- analysis/config.py: Updated component 1 label (simplified explanation,
  removed coalition-specific policy references).
- analysis/config.py: Updated component 2 label to "Nationalistisch versus
  kosmopolitisch" matching raw SVD data (PVV/FVD at positive extreme,
  Volt/DENK/GL-PvdA at negative extreme).
- tests: Updated test assertions to match new labels.
- scripts/validate_svd_themes.py: Verified all components pass right-wing
  alignment check, config flip consistency, and theme pole consistency.

Fixes the core inconsistency: SVD tab component 2 now uses the same raw
SVD data as components 3-10, with consistent party ordering and labels.
The compass remains a separate PCA-based visualization.

tests/test_axis_label_fallback.py

@@ -10,8 +10,8 @@ def test_display_label_for_modal():
     y_label = axis_classifier.display_label_for_modal(None, "y")
 
     # Should return component 1 and 2 labels from SVD_THEMES
-    assert "Rechts kabinetsbeleid" in x_label or "links oppositiebeleid" in x_label
-    assert "PVV/FVD-populisme" in y_label or "mainstream-partijen" in y_label
+    assert "Rechts versus links" in x_label or "links" in x_label.lower()
+    assert "Nationalistisch" in y_label or "kosmopolitisch" in y_label
 
 
 def test_display_label_for_modal_maps_as_labels():
@@ -20,8 +20,8 @@ def test_display_label_for_modal_maps_as_labels():
     y_label = axis_classifier.display_label_for_modal("As 2", "y")
 
     # Should return component 1 and 2 labels
-    assert "Rechts kabinetsbeleid" in x_label or "links oppositiebeleid" in x_label
-    assert "PVV/FVD-populisme" in y_label or "mainstream-partijen" in y_label
+    assert "Rechts versus links" in x_label or "links" in x_label.lower()
+    assert "Nationalistisch" in y_label or "kosmopolitisch" in y_label
 
 
 def test_display_label_for_modal_stempatroon():
@@ -30,8 +30,8 @@ def test_display_label_for_modal_stempatroon():
     y_label = axis_classifier.display_label_for_modal("Stempatroon As 2", "y")
 
     # Should return component 1 and 2 labels
-    assert "Rechts kabinetsbeleid" in x_label or "links oppositiebeleid" in x_label
-    assert "PVV/FVD-populisme" in y_label or "mainstream-partijen" in y_label
+    assert "Rechts versus links" in x_label or "links" in x_label.lower()
+    assert "Nationalistisch" in y_label or "kosmopolitisch" in y_label
 
 
 def test_classify_axes_modal_fallback(monkeypatch, tmp_path):
@@ -84,10 +84,10 @@ def test_classify_axes_modal_fallback(monkeypatch, tmp_path):
 
     # Should now return SVD component labels instead of hardcoded values
     assert (
-        "Rechts kabinetsbeleid" in enriched["x_label"]
-        or "links oppositiebeleid" in enriched["x_label"]
+        "Rechts versus links" in enriched["x_label"]
+        or "links" in enriched["x_label"].lower()
     )
     assert (
-        "PVV/FVD-populisme" in enriched["y_label"]
-        or "mainstream-partijen" in enriched["y_label"]
+        "Nationalistisch" in enriched["y_label"]
+        or "kosmopolitisch" in enriched["y_label"]
     )

tests/test_explorer_labels.py

@@ -5,7 +5,8 @@ import pytest
 
 
 def test_derive_labels_flip_true():
-    """When flip=True, positive_pole should be on left, negative_pole on right."""
+    """Labels should always reflect what's on each side, regardless of flip.
+    negative_pole describes LEFT, positive_pole describes RIGHT."""
     theme = {
         "positive_pole": "Right-wing parties",
         "negative_pole": "Left-wing parties",
@@ -15,17 +16,17 @@ def test_derive_labels_flip_true():
     pos_pole = theme.get("positive_pole", "")
     neg_pole = theme.get("negative_pole", "")
 
-    if flip:
-        left_pole, right_pole = pos_pole, neg_pole
-    else:
-        left_pole, right_pole = neg_pole, pos_pole
+    # Fixed logic: labels don't depend on flip
+    left_pole = neg_pole
+    right_pole = pos_pole
 
-    assert left_pole == "Right-wing parties"
-    assert right_pole == "Left-wing parties"
+    assert left_pole == "Left-wing parties"
+    assert right_pole == "Right-wing parties"
 
 
 def test_derive_labels_flip_false():
-    """When flip=False, negative_pole should be on left, positive_pole on right."""
+    """Labels should always reflect what's on each side, regardless of flip.
+    negative_pole describes LEFT, positive_pole describes RIGHT."""
     theme = {
         "positive_pole": "Right-wing parties",
         "negative_pole": "Left-wing parties",
@@ -35,10 +36,9 @@ def test_derive_labels_flip_false():
     pos_pole = theme.get("positive_pole", "")
     neg_pole = theme.get("negative_pole", "")
 
-    if flip:
-        left_pole, right_pole = pos_pole, neg_pole
-    else:
-        left_pole, right_pole = neg_pole, pos_pole
+    # Fixed logic: labels don't depend on flip
+    left_pole = neg_pole
+    right_pole = pos_pole
 
     assert left_pole == "Left-wing parties"
     assert right_pole == "Right-wing parties"

tests/test_svd_axis_alignment.py

@@ -38,13 +38,10 @@ def test_right_wing_on_right_all_components():
         pos_pole = theme.get("positive_pole", "")
         neg_pole = theme.get("negative_pole", "")
 
-        # Derive left/right labels
-        if flip:
-            left_label = pos_pole
-            right_label = neg_pole
-        else:
-            left_label = neg_pole
-            right_label = pos_pole
+        # Derive left/right labels - labels don't depend on flip
+        # negative_pole describes LEFT, positive_pole describes RIGHT
+        left_label = neg_pole
+        right_label = pos_pole
 
         # Verify no left_pole/right_pole in theme
         assert "left_pole" not in theme, f"Component {comp} has deprecated left_pole"
@@ -68,18 +65,19 @@ def test_label_derivation_matches_fallback():
         neg_pole = theme.get("negative_pole", "")
         flip = theme.get("flip", False)
 
-        # Simulate the fallback logic from explorer.py lines 969-970
-        expected_left = pos_pole if flip else neg_pole
-        expected_right = neg_pole if flip else pos_pole
+        # Simulate the fallback logic from explorer.py (fixed version)
+        # Labels don't depend on flip - negative_pole describes LEFT, positive_pole describes RIGHT
+        expected_left = neg_pole
+        expected_right = pos_pole
 
         # Verify theme doesn't have static labels
         assert "left_pole" not in theme
         assert "right_pole" not in theme
 
         # The derived labels should match the expected fallback
-        # (This is the core fix - we're now always using the fallback)
-        derived_left = pos_pole if flip else neg_pole
-        derived_right = neg_pole if flip else pos_pole
+        # Labels don't depend on flip
+        derived_left = neg_pole
+        derived_right = pos_pole
 
         assert derived_left == expected_left, f"Component {comp} left label mismatch"
         assert derived_right == expected_right, f"Component {comp} right label mismatch"

tests/test_svd_labels.py

@@ -78,13 +78,13 @@ def test_get_svd_label_returns_correct_label():
     """Test that get_svd_label returns the correct label for each component."""
     from analysis.svd_labels import get_svd_label
 
-    # Component 1 should return Rechts kabinetsbeleid label
+    # Component 1 should return Rechts versus links label
     label1 = get_svd_label(1)
-    assert "Rechts kabinetsbeleid" in label1 or "links oppositiebeleid" in label1
+    assert "Rechts versus links" in label1 or "links" in label1.lower()
 
-    # Component 2 should return PVV/FVD-populisme label
+    # Component 2 should return Nationalistisch versus kosmopolitisch label
     label2 = get_svd_label(2)
-    assert "PVV/FVD-populisme" in label2 or "mainstream-partijen" in label2
+    assert "Nationalistisch" in label2 or "kosmopolitisch" in label2
 
     # Component 3 should return Verzorgingsstaat label
     label3 = get_svd_label(3)