fix: persist regime to DB in shared _build_state, deduplicate save logic

- _build_market_state (CLI) now saves regime_history automatically
- _build_state (web) now saves regime_history automatically
- Remove duplicate regime save from cmd_score
- Remove unused imports (timedelta, get_connection)
- Fix: web dashboard never updated regime_history table

ChanMacro/web/app.py

@@ -6,7 +6,8 @@ import sys
 import os
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
-from datetime import date as Date, timedelta
+import json
+from datetime import date as Date
 from flask import Flask, render_template, jsonify, request
 
 from database import get_connection
@@ -23,7 +24,7 @@ app = Flask(__name__)
 
 
 def _build_state(target: Date):
-    """Shared: build MarketStateVector for a date."""
+    """Build MarketStateVector and persist regime to DB."""
     ps = PriceStructureScorer().compute(target)
     br = BreadthScorer().compute(target)
     oi = OIMatrixScorer().compute(target)
@@ -44,6 +45,23 @@ def _build_state(target: Date):
         oi_matrix_score=oi, volatility_regime_score=vol,
     )
     state.market_state_hash = state.compute_hash()
+
+    # Persist regime to DB so load_state() works across requests
+    conn = get_connection()
+    conn.execute("""
+        INSERT OR REPLACE INTO regime_history
+        (date, regime, confidence, regime_version, maturity_score, all_scores_json,
+         prior_regime, confirmation_days)
+        VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+    """, (
+        str(target), r.regime.value, r.confidence, r.regime_version,
+        r.maturity_score, json.dumps(r.all_scores),
+        r.prior_regime.value if r.prior_regime else None,
+        r.confirmation_days,
+    ))
+    conn.commit()
+    conn.close()
+
     return state