fix: resolve SVD axis label alignment and score mismatch in tijdtraject view

Two related bugs fixed:

1. Label alignment: Removed static left_pole/right_pole from SVD_THEMES
   entries. These labels assumed a fixed flip direction but could mismatch
   with runtime flip computation, causing right-wing parties to appear on
   the wrong side. Labels are now always derived from positive_pole,
   negative_pole, and the runtime flip direction.

2. Score mismatch: Changed tijdtraject view for components 3-10 from
   load_party_scores_all_windows_aligned() to load_party_scores_all_windows().
   Procrustes alignment rotates the full 50-dim vector space to align
   components 1-2, but this also transforms components 3-10, making their
   scores incomparable with the single-window view. Per-window flip
   computation already handles orientation alignment for these components.

Also updated svd_labels.py to prefer analysis.config as the canonical
source for SVD_THEMES, falling back to explorer only when config is
unavailable.

analysis/config.py

@@ -80,8 +80,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "Rechts: PVV, VVD, NSC, BBB, JA21 — kabinetsbeleid, defensie en restricties",
         "negative_pole": "Links: GroenLinks-PvdA, SP, PvdD, Volt, DENK — oppositie, zorg en multilateraal",
-        "left_pole": "Links: GroenLinks-PvdA, SP, PvdD, Volt, DENK — oppositie, zorg en multilateraal",
-        "right_pole": "Rechts: PVV, VVD, NSC, BBB, JA21 — kabinetsbeleid, defensie en restricties",
         "flip": False,
     },
     2: {
@@ -97,8 +95,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "PVV en FVD — soevereiniteit en anti-establishment",
         "negative_pole": "Overige partijen: VVD, CDA, SGP, ChristenUnie, GroenLinks-PvdA, D66, Volt, BBB",
-        "left_pole": "Overige partijen: VVD, CDA, SGP, ChristenUnie, GroenLinks-PvdA, D66, Volt, BBB",
-        "right_pole": "PVV en FVD — soevereiniteit en anti-establishment",
         "flip": False,
     },
     3: {
@@ -116,8 +112,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "Pro-verzorgingsstaat: SP, PvdD, GroenLinks-PvdA (anti-bezuinigingen)",
         "negative_pole": "Marktliberaal en fiscaal conservatief: VVD, D66, CDA, SGP, BBB",
-        "left_pole": "Marktliberaal en fiscaal conservatief: VVD, D66, CDA, SGP, BBB",
-        "right_pole": "Pro-verzorgingsstaat: SP, PvdD, GroenLinks-PvdA (anti-bezuinigingen)",
         "flip": True,
     },
     4: {
@@ -132,8 +126,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "D66, CDA, JA21 — moties met brede steun",
         "negative_pole": "NSC, BBB — moties met andere focus",
-        "left_pole": "NSC, BBB — moties met andere focus",
-        "right_pole": "D66, CDA, JA21 — moties met brede steun",
         "flip": True,
     },
     5: {
@@ -150,8 +142,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "Christelijk-sociaal: ChristenUnie, SGP, CDA, NSC — gemeenschap en vrijwilligers",
         "negative_pole": "Progressief-individueel: SP, VVD, GL-PvdA, PvdD, Volt — individuele rechten",
-        "left_pole": "Progressief-individueel: SP, VVD, GL-PvdA, PvdD, Volt — individuele rechten",
-        "right_pole": "Christelijk-sociaal: ChristenUnie, SGP, CDA, NSC — gemeenschap en vrijwilligers",
         "flip": False,
     },
     6: {
@@ -168,8 +158,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "Restrictief migratiebeleid: PVV, JA21, BBB, CDA, ChristenUnie, VVD, SGP, FVD, DENK",
         "negative_pole": "Progressieve inclusie: SP, PvdD, D66, GL-PvdA, Volt — klimaat en diversiteit",
-        "left_pole": "Progressieve inclusie: SP, PvdD, D66, GL-PvdA, Volt — klimaat en diversiteit",
-        "right_pole": "Restrictief migratiebeleid: PVV, JA21, BBB, CDA, ChristenUnie, VVD, SGP, FVD, DENK",
         "flip": False,
     },
     7: {
@@ -188,8 +176,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "Praktisch-bestuurlijk: ChristenUnie, Volt, SGP, DENK, SP",
         "negative_pole": "Ideologisch-principieel: GroenLinks-PvdA, VVD, FVD, JA21",
-        "left_pole": "Ideologisch-principieel: GroenLinks-PvdA, VVD, FVD, JA21",
-        "right_pole": "Praktisch-bestuurlijk: ChristenUnie, Volt, SGP, DENK, SP",
         "flip": True,
     },
     8: {
@@ -207,8 +193,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "Onderwijs en volksgezondheid: BBB, SGP, JA21 — vaccinatie, profielkeuze, woningbouw",
         "negative_pole": "Zorg en toegankelijkheid: SP, DENK, PvdD, Volt — coronaonderzoek, energie, basispakket",
-        "left_pole": "Zorg en toegankelijkheid: SP, DENK, PvdD, Volt — coronaonderzoek, energie, basispakket",
-        "right_pole": "Onderwijs en volksgezondheid: BBB, SGP, JA21 — vaccinatie, profielkeuze, woningbouw",
         "flip": False,
     },
     9: {
@@ -227,8 +211,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "Pragmatisch-bestuurlijk: SGP, ChristenUnie, DENK, SP — concrete oplossingen",
         "negative_pole": "Systeemhervorming: D66, JA21, PVV — idealistische beleidsposities",
-        "left_pole": "Systeemhervorming: D66, JA21, PVV — idealistische beleidsposities",
-        "right_pole": "Pragmatisch-bestuurlijk: SGP, ChristenUnie, DENK, SP — concrete oplossingen",
         "flip": True,
     },
     10: {
@@ -247,8 +229,6 @@ SVD_THEMES: dict[int, dict[str, str]] = {
         ),
         "positive_pole": "Kritisch op overheidsbemoeienis: DENK, SP, PvdD — minder inspectielast en lastenverlichting",
         "negative_pole": "Pro-regulering: GroenLinks-PvdA, CDA, SGP — veiligheid, naleving en handhaving",
-        "left_pole": "Pro-regulering: GroenLinks-PvdA, CDA, SGP — veiligheid, naleving en handhaving",
-        "right_pole": "Kritisch op overheidsbemoeienis: DENK, SP, PvdD — minder inspectielast en lastenverlichting",
         "flip": True,
     },
 }

analysis/svd_labels.py

@@ -34,12 +34,28 @@ def _get_svd_themes() -> Dict[int, Dict[str, str]]:
     if _svd_themes_cache is not None:
         return _svd_themes_cache
 
+    # Prefer the lightweight canonical source in analysis.config which is
+    # intentionally free of heavy runtime dependencies. Fall back to
+    # explorer.SVD_THEMES only when the config module is unavailable or
+    # doesn't expose SVD_THEMES.
     try:
-        # Import SVD_THEMES from explorer at runtime to avoid circular imports
-        # explorer.py now exports SVD_THEMES at module level
+        from analysis import config as _cfg
+
+        _svd_themes_cache = getattr(_cfg, "SVD_THEMES", {}) or {}
+        if _svd_themes_cache:
+            return _svd_themes_cache
+    except Exception:
+        _logger.exception(
+            "Could not import analysis.config or read SVD_THEMES; falling back to explorer"
+        )
+
+    try:
+        # Import explorer at runtime as a last resort; explorer may pull in
+        # heavy dependencies (duckdb/plotly) so we only try this if config
+        # didn't provide the themes.
         import explorer
 
-        _svd_themes_cache = explorer.SVD_THEMES
+        _svd_themes_cache = getattr(explorer, "SVD_THEMES", {}) or {}
         return _svd_themes_cache
     except ImportError as e:
         _logger.warning("Could not import explorer.SVD_THEMES: %s", e)

explorer.py

@@ -2741,10 +2741,13 @@ def build_svd_components_tab(db_path: str) -> None:
                         party_scores[party] = [avg_x, avg_y]
                 party_scores_by_window[window] = party_scores
         else:
-            # Use SVD vectors for components 3-10 with Procrustes alignment
-            party_scores_by_window = load_party_scores_all_windows_aligned(
-                db_path, all_windows
-            )
+            # Use raw (non-aligned) SVD vectors for components 3-10.
+            # Procrustes alignment rotates the full vector space to align
+            # components 1-2 across windows, but this also transforms
+            # components 3-10, making their scores incomparable with the
+            # single-window view. Per-window flip computation handles
+            # orientation alignment for these components.
+            party_scores_by_window = load_party_scores_all_windows(db_path, all_windows)
 
         _render_svd_time_trajectory(
             party_scores_by_window,
@@ -2806,16 +2809,10 @@ def build_svd_components_tab(db_path: str) -> None:
     pos_pole = theme.get("positive_pole", "") if theme else ""
     neg_pole = theme.get("negative_pole", "") if theme else ""
 
-    # Use semantic left/right pole labels if available, otherwise compute from flip
-    semantic_left = theme.get("left_pole") if theme else None
-    semantic_right = theme.get("right_pole") if theme else None
-    if semantic_left and semantic_right:
-        left_pole, right_pole = semantic_left, semantic_right
-        left_motions, right_motions = (
-            (pos_motions, neg_motions) if flip else (neg_motions, pos_motions)
-        )
-        left_arrow, right_arrow = ("▲", "▼") if flip else ("▼", "▲")
-    elif flip:
+    # Derive left/right labels from flip direction
+    # flip=True: positive_pole on left, negative_pole on right
+    # flip=False: negative_pole on left, positive_pole on right
+    if flip:
         left_pole, right_pole = pos_pole, neg_pole
         left_motions, right_motions = pos_motions, neg_motions
         left_arrow, right_arrow = "▲", "▼"

scripts/validate_svd_themes.py

@@ -201,9 +201,8 @@ def check_theme_consistency(
 ) -> List[Dict]:
     """Check that theme pole labels are consistent with actual party positions.
 
-    Note: left_pole/right_pole describe the SEMANTIC left/right after flip,
-    not the political left/right spectrum. This check verifies that the
-    parties mentioned in each pole are actually on the expected side.
+    Note: positive_pole/negative_pole describe the SVD axis orientation.
+    Labels are derived at runtime from flip direction.
 
     Returns list of divergence reports.
     """
@@ -276,13 +275,7 @@ def main() -> int:
                 print(f"  Diff (post-flip R - L): {d['diff']:.4f}")
                 print(f"  Right scores: {d['right_scores']}")
                 print(f"  Left scores:  {d['left_scores']}")
-            elif d["issue"] == "theme_pole_mismatch":
-                print(f"  Label: {d.get('label', '')}")
-                print(f"  Left pole:  {d['left_pole']}")
-                print(f"  Right pole: {d['right_pole']}")
-                print(f"  Left mean:  {d['left_mean']:.4f} ({d['left_parties']})")
-                print(f"  Right mean: {d['right_mean']:.4f} ({d['right_parties']})")
-                print(f"  Diff (left - right): {d['diff']:.4f}")
+
             elif d["issue"] == "missing_canonical_party_data":
                 print(f"  Expected right: {canonical_right}")
                 print(f"  Expected left:  {canonical_left}")