feat: strategy builder

backend/services/database.py

@@ -341,6 +341,11 @@ def init_db():
         "ALTER TABLE strategy_scenarios ADD COLUMN rate_shock_bps REAL DEFAULT 0",
         "ALTER TABLE strategy_scenarios ADD COLUMN dte_min INTEGER",
         "ALTER TABLE strategy_scenarios ADD COLUMN dte_max INTEGER",
+        # Strategy Builder — Construire/Analyse historique merge: tags which mode priced
+        # this strategy when it was saved, so the saved-strategies library (now shown in
+        # both modes) can badge it and the other mode knows it's re-pricing a strategy that
+        # wasn't originally priced there.
+        "ALTER TABLE saved_strategies ADD COLUMN source TEXT DEFAULT 'synthetic'",
     ]:
         try:
             c.execute(_sql)
@@ -6421,8 +6426,8 @@ def save_strategy(strategy: Dict[str, Any]) -> str:
     conn = get_conn()
     conn.execute("""INSERT INTO saved_strategies (
         id, scenario_id, symbol, template_name, objective, legs,
-        entry_cost, max_gain, max_loss, net_pnl_scenario, net_delta, notes
-    ) VALUES (?,?,?,?,?,?,?,?,?,?,?,?)""", (
+        entry_cost, max_gain, max_loss, net_pnl_scenario, net_delta, notes, source
+    ) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?)""", (
         strategy_id,
         strategy.get("scenario_id"),
         strategy["symbol"],
@@ -6435,6 +6440,7 @@ def save_strategy(strategy: Dict[str, Any]) -> str:
         strategy.get("net_pnl_scenario"),
         strategy.get("net_delta"),
         strategy.get("notes", ""),
+        strategy.get("source", "synthetic"),
     ))
     conn.commit()
     conn.close()