feat: add year selector for SVD components 3-10

- Add _load_mp_vectors_by_party_for_window() to load SVD vectors for specific windows
- Add load_party_axis_scores_for_window() cached function
- Add year selector UI for components 3-10 similar to components 1-2
- Uses get_uniform_dim_windows() to get available windows

explorer.py

@@ -2931,7 +2931,33 @@ def build_svd_components_tab(db_path: str) -> None:
                 else {}
             )
     else:
+        # Components 3-10: use SVD vectors with year selection
+        # Get available windows from svd_vectors
+        available_windows = get_uniform_dim_windows(db_path)
+        year_windows = sorted(w for w in available_windows if w != "current_parliament")
+        has_current = "current_parliament" in available_windows
+        svd_windows = year_windows + (["current_parliament"] if has_current else [])
+
+        def _svd_window_label(w: str) -> str:
+            if w == "current_parliament":
+                return "Huidig parlement"
+            return w
+
+        with col1:
+            svd_window = st.selectbox(
+                "Jaar",
+                options=svd_windows,
+                index=len(svd_windows) - 1,  # default: current_parliament
+                format_func=_svd_window_label,
+                key=f"svd_window_{comp_sel}",
+            )
+
+        # Load party scores for the selected window
+        if svd_window == "current_parliament":
             party_scores = party_scores_default
+        else:
+            party_scores = load_party_axis_scores_for_window(db_path, svd_window)
+
         # For components 3-10, compute MP counts from party_mp_vectors
         party_mp_counts = (
             {p: len(v) for p, v in party_mp_vectors.items()} if party_mp_vectors else {}