Fix option history to full closes only, 2-decimal USDC, restore hide-delete.

Filter OKX positions-history to type 2/3/6, format premium and bid recovery to 2 decimals, and allow locally hiding rows via delete button.

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

lib/options/options_db.py

@@ -46,6 +46,14 @@ def init_options_tables(conn: sqlite3.Connection) -> None:
         )
         """
     )
+    conn.execute(
+        """
+        CREATE TABLE IF NOT EXISTS options_history_hidden (
+            history_key TEXT PRIMARY KEY,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+        """
+    )
     conn.execute(
         """
         CREATE TABLE IF NOT EXISTS options_transfer_log (