refactor

src/lib/components/charts/EChart.svelte

@@ -16,7 +16,9 @@
 <script lang="ts">
 	import { onDestroy, onMount } from 'svelte';
 
-	import * as echarts from 'echarts';
+	import { echarts } from './echarts';
+
+	import type { ECharts } from 'echarts';
 
 	// ─── Props ──────────────────────────────────────────────────────────────────
 
@@ -36,7 +38,7 @@
 		/** Optional CSS class for the outer container */
 		class?: string;
 		/** Callback fired once the chart instance is initialized */
-		onChartReady?: (chart: echarts.ECharts) => void;
+		onChartReady?: (chart: ECharts) => void;
 		/** Callback fired when the chart is disposed */
 		onChartDisposed?: () => void;
 	}
@@ -56,7 +58,7 @@
 	// ─── Internal State ─────────────────────────────────────────────────────────
 
 	let containerEl: HTMLDivElement;
-	let chartInstance: echarts.ECharts | null = null;
+	let chartInstance: ECharts | null = null;
 	let resizeObserver: ResizeObserver | null = null;
 
 	// ─── Public API ─────────────────────────────────────────────────────────────
@@ -64,7 +66,7 @@
 	/**
 	 * Returns the underlying ECharts instance, or null if not yet initialized.
 	 */
-	export function getChart(): echarts.ECharts | null {
+	export function getChart(): ECharts | null {
 		return chartInstance;
 	}
 

src/lib/components/charts/echarts.ts

@@ -0,0 +1,34 @@
+// Tree-shaken ECharts build: only the pieces the app actually renders (line
+// and bar series with grid/tooltip/legend/dataZoom/mark/graphic features) are
+// registered, instead of the ~1 MB full bundle.
+import { BarChart, LineChart } from 'echarts/charts';
+import {
+	DataZoomInsideComponent,
+	DataZoomSliderComponent,
+	GraphicComponent,
+	GridComponent,
+	LegendComponent,
+	MarkAreaComponent,
+	MarkLineComponent,
+	TitleComponent,
+	TooltipComponent
+} from 'echarts/components';
+import * as echarts from 'echarts/core';
+import { CanvasRenderer } from 'echarts/renderers';
+
+echarts.use([
+	LineChart,
+	BarChart,
+	GridComponent,
+	TooltipComponent,
+	LegendComponent,
+	TitleComponent,
+	DataZoomInsideComponent,
+	DataZoomSliderComponent,
+	MarkLineComponent,
+	MarkAreaComponent,
+	GraphicComponent,
+	CanvasRenderer
+]);
+
+export { echarts };

src/lib/components/location/location-search.svelte

@@ -64,17 +64,19 @@
 			return {
 				results: [
 					{
-						id: 100000000 + Math.floor(latitude * 100 + longitude + 1000),
+						// coordinate-only location: id 0 + COORD makes
+						// buildLocationRoute emit a "52.52N13.41E" route
+						id: 0,
 						name: `GPS ${latitude.toFixed(2)}°N ${longitude.toFixed(2)}°E`,
 						latitude: latitude,
 						longitude: longitude,
-						elevation: position.coords.altitude ?? NaN,
-						feature_code: '',
+						elevation: position.coords.altitude ?? 0,
+						feature_code: 'COORD',
 						country_code: undefined,
 						admin1_id: undefined,
 						admin3_id: undefined,
 						admin4_id: undefined,
-						timezone: '',
+						timezone: 'UTC',
 						population: undefined,
 						postcodes: undefined,
 						country_id: undefined,