Isolate CTP in worker process and improve strategy roll UX.

Split vn.py into qihuo-ctp worker with IPC client bridge, keep CTP connected during breaks with cached account fallback, speed up strategy page loads, and allow off-session breakout roll submissions.

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

strategy/strategy_roll_lib.py

@@ -170,6 +170,7 @@ def validate_roll_geometry(
     limit_price: Optional[float] = None,
     breakthrough_price: Optional[float] = None,
     at_trigger: bool = False,
+    off_session_pending: bool = False,
 ) -> Optional[str]:
     """几何校验。
 
@@ -206,6 +207,12 @@ def validate_roll_geometry(
         trigger = float(breakthrough_price or 0)
         if trigger <= 0:
             return "须填写突破价"
+        if off_session_pending:
+            if direction == "long" and not (sl < trigger):
+                return "做多突破：休盘提交须满足 止损 < 突破价"
+            if direction == "short" and not (trigger < sl):
+                return "做空突破：休盘提交须满足 突破价 < 止损"
+            return None
         if at_trigger:
             if direction == "long":
                 if not (sl < trigger <= mark):
@@ -269,12 +276,15 @@ def preview_roll(
     fib_lower: Optional[float] = None,
     legs_done: int = 0,
     at_trigger: bool = False,
+    off_session_pending: bool = False,
 ) -> Tuple[Optional[dict[str, Any]], Optional[str]]:
     direction = (direction or "long").strip().lower()
     if legs_done >= max_roll_legs(direction):
         return None, f"滚仓已达 {max_roll_legs(direction)} 次上限"
     mode = (add_mode or ADD_MODE_MARKET).strip().lower()
     mark = float(mark_price or add_price or 0)
+    if mark <= 0 and mode == ADD_MODE_BREAKOUT and off_session_pending:
+        mark = float(breakthrough_price or 0)
     if mark <= 0:
         return None, "需要有效参考价"
     sl = float(new_stop_loss)
@@ -314,6 +324,7 @@ def preview_roll(
         limit_price=trigger_price if mode in FIB_MODES else None,
         breakthrough_price=trigger_price if mode == ADD_MODE_BREAKOUT else None,
         at_trigger=at_trigger,
+        off_session_pending=off_session_pending and is_pending,
     )
     if geom_err:
         return None, geom_err