From d9a4bd19ebdd96e0900e4f935da3105f6f7e535c Mon Sep 17 00:00:00 2001
From: Akira <akia@keinafarm.com>
Date: Mon, 16 Mar 2026 10:13:41 +0900
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- getPlanAvailableStock: 自計画の引当を足し戻す計算を廃止し、
  サーバー側available_stock + 初期引当 - 現在計画量でリアルタイム算出
- getPlanShortage: available_stockベースの不足判定に変更
- 編集中の計画変更が即座に利用可能数に反映されるように

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 .../src/app/fertilizer/_components/FertilizerEditPage.tsx    | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/frontend/src/app/fertilizer/_components/FertilizerEditPage.tsx b/frontend/src/app/fertilizer/_components/FertilizerEditPage.tsx
index 69dfdf3..3366777 100644
--- a/frontend/src/app/fertilizer/_components/FertilizerEditPage.tsx
+++ b/frontend/src/app/fertilizer/_components/FertilizerEditPage.tsx
@@ -369,7 +369,10 @@ export default function FertilizerEditPage({ planId }: { planId?: number }) {
   const getPlanAvailableStock = (fertilizer: Fertilizer) => {
     const stock = getStockInfo(fertilizer);
     if (!stock) return null;
-    return getNumericValue(stock.available_stock);
+    const serverAvailable = getNumericValue(stock.available_stock);
+    const initialReserve = initialPlanTotals[fertilizer.id] ?? 0;
+    const currentPlanTotal = colTotal(fertilizer.id);
+    return serverAvailable + initialReserve - currentPlanTotal;
   };
   const getPlanShortage = (fertilizer: Fertilizer) => {
     const available = getPlanAvailableStock(fertilizer);