feat(frontend): add weather icons and redesign calendar header

Backend changes:
- Add LOCATION configuration option to Settings
- Add /api/system/config endpoint to expose public config
- Implement location priority: config > geolocation > default

Frontend changes:
- Install and integrate weather-icons npm package (Erik Flowers)
- Redesign calendar header with date/time on left, weather/location on right
- Display weather icon using CSS classes instead of SVG components
- Fetch location from backend API on component mount
- Use configured location name (from .env) instead of geocoded result

Layout:
- Left: month/year + current time
- Right: city name + weather description + weather icon

frontend/src/main.ts

@@ -2,6 +2,7 @@ import { createApp } from 'vue'
 import { createPinia } from 'pinia'
 import ElementPlus from 'element-plus'
 import 'element-plus/dist/index.css'
+import 'weather-icons/css/weather-icons.css'
 import router from './app/router'
 import App from './App.vue'
 import './style.css'

frontend/src/pages/chat/chatPage.css

@@ -78,7 +78,9 @@
   gap: 6px;
 }
 
-.weather-icon {
+.weather-icon,
+.weather-inline .wi {
+  font-size: 16px;
   color: #7dd3fc;
   flex-shrink: 0;
 }
@@ -2086,6 +2088,44 @@
   margin-bottom: 14px;
 }
 
+.jarvis-location {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-width: 0;
+}
+
+.location-icon {
+  font-size: 20px;
+  color: rgba(223, 247, 255, 0.9);
+  flex-shrink: 0;
+}
+
+.location-info {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0;
+}
+
+.location-name {
+  font-size: 12px;
+  font-weight: 500;
+  color: rgba(223, 247, 255, 0.7);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.location-weather-text {
+  font-size: 11px;
+  font-weight: 400;
+  color: rgba(160, 232, 255, 0.6);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
 .jarvis-date-num {
   min-width: 62px;
   font-family: var(--font-display);

frontend/src/pages/chat/composables/useClientTime.ts

@@ -1,5 +1,4 @@
 import { computed, onMounted, onUnmounted, ref } from 'vue'
-import { Cloud, CloudDrizzle, CloudFog, CloudLightning, CloudRain, CloudSnow, Sun } from 'lucide-vue-next'
 
 export function formatNetworkRate(bytesPerSecond: number | null, online: boolean) {
   if (!online || bytesPerSecond === null) return 'OFFLINE'
@@ -10,10 +9,24 @@ export function formatNetworkRate(bytesPerSecond: number | null, online: boolean
 
 export function useClientTime() {
   const clientTime = ref(new Date())
+  const city = ref('Location')
   const weatherSummary = ref('Weather unavailable')
   const weatherCode = ref<number | null>(null)
   let clientTimeTimer: ReturnType<typeof setInterval> | null = null
 
+  // Load location from backend config
+  async function loadLocation() {
+    try {
+      const response = await fetch('/api/system/config')
+      if (response.ok) {
+        const config = await response.json()
+        city.value = config.location || 'Location'
+      }
+    } catch {
+      city.value = import.meta.env.VITE_LOCATION || 'Location'
+    }
+  }
+
   function updateClientTime() {
     clientTime.value = new Date()
   }
@@ -40,27 +53,48 @@ export function useClientTime() {
 
   const weatherIcon = computed(() => {
     const code = weatherCode.value
-    if (code === 0) return Sun
-    if (code === 1 || code === 2 || code === 3) return Cloud
-    if (code === 45 || code === 48) return CloudFog
-    if ([51, 53, 55, 56, 57].includes(code ?? -1)) return CloudDrizzle
-    if ([61, 63, 65, 66, 67, 80, 81, 82].includes(code ?? -1)) return CloudRain
-    if ([71, 73, 75, 77, 85, 86].includes(code ?? -1)) return CloudSnow
-    if ([95, 96, 99].includes(code ?? -1)) return CloudLightning
-    return Cloud
+    if (code === 0) return 'wi-day-sunny'
+    if (code === 1) return 'wi-day-cloudy'
+    if (code === 2) return 'wi-day-cloudy-gusts'
+    if (code === 3) return 'wi-cloudy'
+    if (code === 45) return 'wi-day-fog'
+    if (code === 48) return 'wi-fog'
+    if ([51, 53].includes(code ?? -1)) return 'wi-day-showers'
+    if ([55, 56, 57].includes(code ?? -1)) return 'wi-showers'
+    if ([61, 63, 65, 80].includes(code ?? -1)) return 'wi-day-rain'
+    if ([66, 67, 81, 82].includes(code ?? -1)) return 'wi-rain'
+    if ([71, 73, 75, 77, 85, 86].includes(code ?? -1)) return 'wi-snow'
+    if ([95, 96, 99].includes(code ?? -1)) return 'wi-thunderstorm'
+    return 'wi-day-sunny'
   })
 
   async function loadWeather(latitude: number, longitude: number) {
     try {
-      const response = await fetch(
+      // Fetch weather data
+      const weatherResp = await fetch(
         `https://api.open-meteo.com/v1/forecast?latitude=${latitude}&longitude=${longitude}&current=temperature_2m,weather_code&timezone=auto`,
       )
-      if (!response.ok) throw new Error('weather request failed')
-      const data = await response.json()
-      const current = data.current ?? {}
+      if (!weatherResp.ok) throw new Error('weather request failed')
+      const weatherData = await weatherResp.json()
+      const current = weatherData.current ?? {}
       weatherCode.value = typeof current.weather_code === 'number' ? current.weather_code : null
       const temp = typeof current.temperature_2m === 'number' ? `${Math.round(current.temperature_2m)}°C` : '--'
       weatherSummary.value = `${weatherCodeLabel(current.weather_code)} ${temp}`
+
+      // Only fetch city name if not already set by config
+      if (city.value === 'Location') {
+        try {
+          const geoResp = await fetch(
+            `https://nominatim.openstreetmap.org/reverse?format=json&lat=${latitude}&lon=${longitude}&zoom=10`,
+          )
+          if (geoResp.ok) {
+            const geoData = await geoResp.json()
+            city.value = geoData.address?.city ?? geoData.address?.town ?? geoData.address?.county ?? geoData.display_name?.split(',')[0] ?? 'Location'
+          }
+        } catch {
+          city.value = 'Location'
+        }
+      }
     } catch {
       weatherCode.value = null
       weatherSummary.value = 'Weather unavailable'
@@ -70,6 +104,7 @@ export function useClientTime() {
   onMounted(() => {
     updateClientTime()
     clientTimeTimer = setInterval(updateClientTime, 1000)
+    void loadLocation()
     if (!navigator.geolocation) {
       weatherCode.value = null
       weatherSummary.value = 'Weather unavailable'
@@ -87,7 +122,7 @@ export function useClientTime() {
   })
 
   return {
-    clientTime, weatherSummary, weatherCode, weatherIcon,
+    clientTime, city, weatherSummary, weatherCode, weatherIcon,
     updateClientTime, formatClientDate, formatClientClock, weatherCodeLabel, loadWeather
   }
 }

frontend/src/pages/chat/index.vue

@@ -62,7 +62,7 @@ const {
 } = useKnowledgeView()
 
 // --- Client time & weather ---
-const { clientTime, weatherIcon, weatherSummary, formatClientDate, formatClientClock } = useClientTime()
+const { clientTime, city, weatherIcon, weatherSummary, formatClientDate, formatClientClock } = useClientTime()
 
 // --- Daily digest & reminders ---
 const { dailyDigest, digestLoading, activeReminder, reminderVisible, loadDailyDigest, handleSnooze, handleDismiss } = useDailyDigest()
@@ -228,11 +228,17 @@ function renderMarkdown(content: string) {
       <div v-else class="jarvis-sidebar-scroll">
         <div class="jarvis-panel jarvis-date-panel">
           <div class="jarvis-date-row">
-            <div class="jarvis-date-num">{{ clientTime.getDate().toString().padStart(2, '0') }}</div>
             <div class="jarvis-date-meta">
-              <div class="jarvis-month">{{ clientTime.toLocaleString('zh-CN', { month: 'long' }) }} / {{ clientTime.getFullYear() }}</div>
+              <div class="jarvis-month">{{ clientTime.toLocaleString('zh-CN', { month: 'long' }) }} {{ clientTime.getFullYear() }}</div>
               <div class="jarvis-time">{{ clientTime.toLocaleTimeString('zh-CN', { hour12: false }) }}</div>
             </div>
+            <div class="jarvis-location">
+              <div class="location-info">
+                <span class="location-name">{{ city }}</span>
+                <span class="location-weather-text">{{ weatherSummary }}</span>
+              </div>
+              <i :class="['wi', weatherIcon, 'location-icon']"></i>
+            </div>
           </div>
 
           <div class="jarvis-calendar">
@@ -564,7 +570,7 @@ function renderMarkdown(content: string) {
               <div class="runtime-meta-item">
                 <span class="runtime-meta-key">WEATHER</span>
                 <span class="runtime-meta-value weather-inline">
-                  <component :is="weatherIcon" :size="14" class="weather-icon" />
+                  <i :class="['wi', weatherIcon]"></i>
                   <span>{{ weatherSummary }}</span>
                 </span>
               </div>