fix(gate): align fund transfer between gate and gate_bot

- Extract shared gate_transfer_lib and global transfer form on all pages

- Block auto-transfer when trend pullback plans have open positions

- Redirect manual transfer back to the current page after submit

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

gate_transfer_lib.py

@@ -0,0 +1,55 @@
+"""Gate.io 资金划转（crypto_monitor_gate / crypto_monitor_gate_bot 共用）。"""
+from __future__ import annotations
+
+from typing import Any, Callable, Optional
+
+INVALID_KEY_HINT = (
+    "。常见原因：① GATE_API_SECRET 错误或 .env 里多了空格/换行；② IP 白名单未包含当前服务器出口 IP；"
+    "③ Gate「交易账户」类 API Key 若不支持钱包接口则无法走账户内划转 POST /wallet/transfers（需在官网确认该 Key 类型是否开放划转）；"
+    "④ Key 已重置或权限变更。你已勾选现货/统一账户仍报错时，优先核对 Secret 与白名单。"
+)
+
+
+def execute_transfer_usdt(
+    exchange,
+    amount: float,
+    from_account: str,
+    to_account: str,
+    *,
+    transfer_ccy: str = "USDT",
+    ensure_live_ready: Callable[[], tuple[bool, str]],
+    ensure_markets_loaded: Optional[Callable[[], None]] = None,
+) -> tuple[bool, str, Any]:
+    if amount <= 0:
+        return False, "划转金额必须大于0", None
+    ok_live, reason = ensure_live_ready()
+    if not ok_live:
+        return False, reason, None
+    if ensure_markets_loaded:
+        try:
+            ensure_markets_loaded()
+        except Exception:
+            pass
+    try:
+        resp = exchange.transfer(transfer_ccy, float(amount), from_account, to_account)
+        return True, "划转成功", resp
+    except Exception as e:
+        msg = str(e)
+        if "INVALID_KEY" in msg or "Invalid key" in msg:
+            msg += INVALID_KEY_HINT
+        return False, msg, None
+
+
+def count_auto_transfer_blockers(conn, *, count_order_monitors: Callable[[Any], int]) -> int:
+    """自动划转持仓守卫：order_monitors active + 趋势回调已开仓计划。"""
+    n = int(count_order_monitors(conn) or 0)
+    if n > 0:
+        return n
+    try:
+        row = conn.execute(
+            "SELECT COUNT(*) FROM trend_pullback_plans "
+            "WHERE status='active' AND COALESCE(first_order_done, 0) != 0"
+        ).fetchone()
+        return int(row[0] or 0) if row else 0
+    except Exception:
+        return n