feat: add weather source entity and weather-reactive CSS source type

New standalone WeatherSource entity with pluggable provider architecture
(Open-Meteo v1, free, no API key). Full CRUD, test endpoint, browser
geolocation, IconSelect provider picker, CardSection with test/clone/edit.

WeatherColorStripStream maps WMO weather codes to ambient color palettes
with temperature hue shifting and thunderstorm flash effects. Ref-counted
WeatherManager polls API and caches data per source.

CSS editor integration: weather type with EntitySelect source picker,
speed and temperature influence sliders. Backup/restore support.

i18n for en/ru/zh.

server/src/wled_controller/static/locales/zh.json

@@ -1117,6 +1117,16 @@
     "color_strip.type.candlelight": "烛光",
     "color_strip.type.candlelight.desc": "逼真的烛光闪烁模拟",
     "color_strip.type.candlelight.hint": "在所有LED上模拟逼真的蜡烛闪烁，具有温暖色调和有机闪烁模式。",
+    "color_strip.type.weather": "天气",
+    "color_strip.type.weather.desc": "天气感应环境色彩",
+    "color_strip.type.weather.hint": "将实时天气状况映射为环境LED颜色。需要天气源实体。",
+    "color_strip.weather.source": "天气源：",
+    "color_strip.weather.source.hint": "用于环境颜色的天气数据源。请先在天气标签页中创建。",
+    "color_strip.weather.speed": "动画速度：",
+    "color_strip.weather.speed.hint": "环境色彩漂移动画速度。越高越快。",
+    "color_strip.weather.temperature_influence": "温度影响：",
+    "color_strip.weather.temperature_influence.hint": "当前温度对调色板冷暖偏移程度。0=纯天气颜色，1=强偏移。",
+    "color_strip.weather.error.no_source": "请选择天气源",
     "color_strip.candlelight.color": "基础颜色：",
     "color_strip.candlelight.color.hint": "蜡烛火焰的温暖基础颜色。默认为自然温暖的琥珀色。",
     "color_strip.candlelight.intensity": "闪烁强度：",
@@ -1631,6 +1641,36 @@
     "sync_clock.reset_done": "时钟已重置为零",
     "sync_clock.delete.confirm": "删除此同步时钟？关联的源将失去同步并以默认速度运行。",
     "sync_clock.elapsed": "已用时间",
+    "weather_source.group.title": "天气源",
+    "weather_source.add": "添加天气源",
+    "weather_source.edit": "编辑天气源",
+    "weather_source.name": "名称：",
+    "weather_source.name.placeholder": "我的天气",
+    "weather_source.name.hint": "天气数据源的描述性名称",
+    "weather_source.provider": "提供商：",
+    "weather_source.provider.hint": "天气数据提供商。Open-Meteo免费且无需API密钥。",
+    "weather_source.provider.open_meteo.desc": "免费，无需API密钥",
+    "weather_source.location": "位置：",
+    "weather_source.location.hint": "您的地理坐标。使用自动检测按钮或手动输入。",
+    "weather_source.latitude": "纬度：",
+    "weather_source.longitude": "经度：",
+    "weather_source.use_my_location": "使用我的位置",
+    "weather_source.update_interval": "更新间隔：",
+    "weather_source.update_interval.hint": "获取天气数据的频率。值越低，更新越及时。",
+    "weather_source.description": "描述（可选）：",
+    "weather_source.description.placeholder": "可选描述",
+    "weather_source.test": "测试",
+    "weather_source.error.name_required": "天气源名称为必填项",
+    "weather_source.error.load": "加载天气源失败",
+    "weather_source.created": "天气源已创建",
+    "weather_source.updated": "天气源已更新",
+    "weather_source.deleted": "天气源已删除",
+    "weather_source.delete.confirm": "删除此天气源？关联的色带源将失去天气数据。",
+    "weather_source.geo.success": "位置已检测",
+    "weather_source.geo.error": "地理定位失败",
+    "weather_source.geo.not_supported": "您的浏览器不支持地理定位",
+    "streams.group.weather": "天气",
+    "section.empty.weather_sources": "暂无天气源。点击+添加。",
     "color_strip.clock": "同步时钟：",
     "color_strip.clock.hint": "关联同步时钟以在多个源之间同步动画。速度在时钟上控制。",
     "graph.title": "图表",