Fix options mark price float junk and target index input rollback.

Skip full card redraw while the monitor target field is focused, and format mark/avg without relying on dusty server strings.

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

lib/exchange/okx_options_lib.py

@@ -115,7 +115,9 @@ def round_option_px(px: float, tick_sz: Any, side: str) -> float:
 def format_option_px(px: float, tick_sz: Any) -> str:
     tick = _safe_float(tick_sz)
     if tick is None or tick <= 0:
-        return str(px)
+        # 无 tick 时裁到 4 位并去尾零,避免 482.4881990066513 这类浮点毛刺
+        s = f"{float(px):.4f}".rstrip("0").rstrip(".")
+        return s or "0"
     if tick < 1:
         decimals = max(0, -int(round(math.log10(tick))))
         return f"{px:.{decimals}f}".rstrip("0").rstrip(".") or "0"