Add OKX-style funds bar with USDT/USDC convert and transfer.

SIM uses multi-wallet balances; LIVE hits OKX asset/account APIs and spot USDC-USDT swap. Funds strip hides sim labeling.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/models/db.py

@@ -123,6 +123,16 @@ CREATE TABLE IF NOT EXISTS residual_options (
   note TEXT,
   FOREIGN KEY(group_id) REFERENCES groups(group_id)
 );
+CREATE TABLE IF NOT EXISTS funds_wallets (
+  id INTEGER PRIMARY KEY CHECK (id = 1),
+  funding_usdt REAL NOT NULL DEFAULT 0,
+  trading_usdt REAL NOT NULL DEFAULT 0,
+  options_funding_usdc REAL NOT NULL DEFAULT 0,
+  options_trading_usdc REAL NOT NULL DEFAULT 0,
+  options_funding_usdt REAL NOT NULL DEFAULT 0,
+  options_trading_usdt REAL NOT NULL DEFAULT 0,
+  updated_at_ms INTEGER NOT NULL
+);
 """
 
 
@@ -192,6 +202,19 @@ class Database:
                     "INSERT INTO strategy_state(id, running, phase, rounds_done, updated_at_ms) VALUES (1,0,'idle',0,?)",
                     (now,),
                 )
+            fw = self._conn.execute("SELECT id FROM funds_wallets WHERE id=1").fetchone()
+            if fw is None:
+                led = self._conn.execute(
+                    "SELECT equity FROM ledger_meta WHERE id=1"
+                ).fetchone()
+                eq = float(led["equity"]) if led else float(s.initial_equity)
+                self._conn.execute(
+                    """INSERT INTO funds_wallets(
+                        id, funding_usdt, trading_usdt, options_funding_usdc, options_trading_usdc,
+                        options_funding_usdt, options_trading_usdt, updated_at_ms
+                    ) VALUES (1,?,0,0,0,0,0,?)""",
+                    (eq, now),
+                )
             defaults = {
                 "fee_rate": str(s.fee_rate),
                 "initial_equity": str(s.initial_equity),