feat: hands API — log_hand endpoint, update_hand store fn, edit/delete routes

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01G796GsLCvJQKVN7hwV2cDx

lyra/poker.py

@@ -558,6 +558,22 @@ def log_hand(session_id: int | None = None, **fields) -> int:
     return int(cur.lastrowid)
 
 
+def update_hand(hand_id: int, **fields) -> dict | None:
+    """Edit a logged hand's flat fields (fix a mislabeled board, result, villain).
+    Only known columns are touched. Returns the updated hand row or None."""
+    sets, vals = [], []
+    for k, v in fields.items():
+        if k in _HAND_FIELDS and v is not None:
+            sets.append(f"{k} = ?")
+            vals.append(v)
+    if sets:
+        conn = _c()
+        with conn:
+            conn.execute(f"UPDATE poker_hands SET {', '.join(sets)} WHERE id = ?",
+                         (*vals, hand_id))
+    return get_hand(hand_id)
+
+
 def list_hands(session_id: int | None = None) -> list[dict]:
     sid = _resolve(session_id)
     if sid is None: