feat: weather conditions check from stroy-bot-main

Ports the weather check added to stroy-bot-main on 2026-10-16: daily
station weather, report positions with weather per shift and the AI
assessment of working conditions. Opens as ?page=weather&start=&end=
instead of the #weathercheck hash, and hub dates survive the way back.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/webparts/stroyBot/pages/weather/WeatherHint.tsx

@@ -0,0 +1,14 @@
+import * as React from 'react';
+import { Icon } from '@tnsu/ui-kit';
+import styles from './WeatherPage.module.scss';
+
+interface Props {
+  text: string;
+}
+
+/** Подсказка, почему сверку не загрузить (нет проекта / периода). */
+export const WeatherHint: React.FC<Props> = ({ text }) => (
+  <div className={styles.hint}>
+    <Icon name="info" size="sm" /> {text}
+  </div>
+);