From 3c888f0503b9bd8fe1a3d5660f819d7826f58a1a Mon Sep 17 00:00:00 2001
From: Akira <akia@keinafarm.com>
Date: Sat, 28 Feb 2026 13:48:25 +0900
Subject: [PATCH] =?UTF-8?q?Tooltip=20formatter=20=E3=81=AE=20TypeScript=20?=
 =?UTF-8?q?=E5=9E=8B=E3=82=A8=E3=83=A9=E3=83=BC=E3=82=92=E4=BF=AE=E6=AD=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 frontend/src/app/weather/page.tsx | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/frontend/src/app/weather/page.tsx b/frontend/src/app/weather/page.tsx
index dcca6be..9d8a6be 100644
--- a/frontend/src/app/weather/page.tsx
+++ b/frontend/src/app/weather/page.tsx
@@ -214,7 +214,10 @@ export default function WeatherPage() {
                       domain={['auto', 'auto']}
                     />
                     <Tooltip
-                      formatter={(value: number | null) => value == null ? '—' : `${value.toFixed(1)}℃`}
+                      formatter={(value: unknown) => {
+                        if (value == null || typeof value !== 'number') return '—';
+                        return `${value.toFixed(1)}℃`;
+                      }}
                     />
                     <Legend />
                     <Line
@@ -266,8 +269,8 @@ export default function WeatherPage() {
                       tickFormatter={(v) => `${v}h`}
                     />
                     <Tooltip
-                      formatter={(value: number | null, name: string) => {
-                        if (value == null) return '—';
+                      formatter={(value: unknown, name: unknown) => {
+                        if (value == null || typeof value !== 'number') return '—';
                         return name === '降水量' ? `${value} mm` : `${value} h`;
                       }}
                     />