Polish risk sizing: 2dp money preview, editable ratio/exit, plan badge.

Exit unit and perp/option units scale with k; plan page shows 以损定仓.

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

frontend/src/pages/Plan.tsx

@@ -151,7 +151,9 @@ export default function PlanPage() {
   const exitRuleLabel =
     exitMode === "premium_multiple"
       ? `权利金×${fmt(plan?.premium_exit_multiple ?? 1, 2)}`
-      : `固定 ${fmt(plan?.net_profit_target ?? 15)} U`;
+      : plan?.risk_based || plan?.sizing_mode === "risk_based"
+        ? `以损定仓 · 固定 ${fmt(exitTarget)} U（基数${fmt(plan?.risk_exit_unit ?? 15)}）`
+        : `固定 ${fmt(plan?.net_profit_target ?? 15)} U`;
   const phaseLabel = PHASE_ZH[plan?.phase || ""] || plan?.phase || "—";
   const atmRule = plan?.fixed_direction_enabled
     ? plan?.fixed_perp_side === "short"
@@ -343,8 +345,20 @@ export default function PlanPage() {
               <div className="kv">
                 <span>选约条件</span>
                 <span className="mono">
-                  永续{fmt(plan?.perp_qty_eth ?? 1, 0)}ETH/期权
-                  {fmt(plan?.option_qty_eth ?? 2, 0)}ETH · 剩余≥
+                  {plan?.risk_based || plan?.sizing_mode === "risk_based" ? (
+                    <>
+                      <span className="status-running">以损定仓</span>
+                      {" · "}
+                      比例{fmt(plan?.risk_perp_unit ?? 1, 2)}:
+                      {fmt(plan?.risk_option_unit ?? 2, 2)}
+                      {plan?.risk_last_k
+                        ? ` · k=${fmt(plan.risk_last_k, 1)}`
+                        : ""}
+                      {" · "}
+                    </>
+                  ) : null}
+                  永续{fmt(plan?.perp_qty_eth ?? 1, 2)}ETH/期权
+                  {fmt(plan?.option_qty_eth ?? 2, 2)}ETH · 剩余≥
                   {fmt(plan?.min_option_hours, 0)}h · 期权杠杆≥
                   {fmt(plan?.min_option_leverage, 0)}x
                   {plan?.fixed_direction_enabled