From 238c4d1caf44f16a724956a7b71e94ed0e0e5cd2 Mon Sep 17 00:00:00 2001
From: zephyrdark <zephyrdark@gmail.com>
Date: Wed, 18 Feb 2026 21:51:05 +0900
Subject: [PATCH] feat: accept valuation amount instead of price for
 rebalancing input

For holdings with quantity > 0, the input now accepts the total
valuation amount and derives the current price by dividing by quantity.
Holdings with quantity 0 (target-only) still accept price directly.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 .../src/app/portfolio/[id]/rebalance/page.tsx   | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/frontend/src/app/portfolio/[id]/rebalance/page.tsx b/frontend/src/app/portfolio/[id]/rebalance/page.tsx
index 2ddc6ca..574938f 100644
--- a/frontend/src/app/portfolio/[id]/rebalance/page.tsx
+++ b/frontend/src/app/portfolio/[id]/rebalance/page.tsx
@@ -111,8 +111,13 @@ export default function RebalancePage() {
     setError(null);
     try {
       const priceMap: Record<string, number> = {};
-      for (const [ticker, price] of Object.entries(prices)) {
-        priceMap[ticker] = parseFloat(price);
+      for (const [ticker, value] of Object.entries(prices)) {
+        const qty = getHoldingQty(ticker);
+        if (qty > 0) {
+          priceMap[ticker] = parseFloat(value) / qty;
+        } else {
+          priceMap[ticker] = parseFloat(value);
+        }
       }
 
       const body: Record<string, unknown> = {
@@ -190,23 +195,25 @@ export default function RebalancePage() {
       {/* Price Input */}
       <Card className="mb-6">
         <CardHeader>
-          <CardTitle>현재 가격 입력</CardTitle>
+          <CardTitle>평가 금액 입력</CardTitle>
         </CardHeader>
         <CardContent>
           <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
             {Object.keys(prices).map((ticker) => {
               const target = targets.find((t) => t.ticker === ticker);
+              const qty = getHoldingQty(ticker);
+              const isValuation = qty > 0;
               return (
                 <div key={ticker}>
                   <Label htmlFor={`price-${ticker}`}>
-                    {nameMap[ticker] || ticker} {target ? `(목표 ${target.target_ratio}%)` : ''} - 보유 {getHoldingQty(ticker)}주
+                    {nameMap[ticker] || ticker} {target ? `(목표 ${target.target_ratio}%)` : ''} - 보유 {qty}주
                   </Label>
                   <Input
                     id={`price-${ticker}`}
                     type="number"
                     value={prices[ticker]}
                     onChange={(e) => setPrices((prev) => ({ ...prev, [ticker]: e.target.value }))}
-                    placeholder="현재 가격"
+                    placeholder={isValuation ? '평가 금액' : '현재 가격'}
                     className="mt-1"
                   />
                 </div>