v1.0.3: Fix PDF footer overlap, arrow alignment, screenshot quality, arrowheads in export

src/app/app/page.tsx

@@ -1130,6 +1130,32 @@ export default function AppPage() {
         }
       }
 
+      // Draw arrowheads for arrow features
+      for (const f of currentFeatures.filter(f => f.type === 'arrow')) {
+        if (f.geometry.type !== 'LineString') continue
+        const lineCoords = f.geometry.coordinates as number[][]
+        if (lineCoords.length < 2) continue
+        const p1 = lineCoords[lineCoords.length - 2]
+        const p2 = lineCoords[lineCoords.length - 1]
+        const px1 = mapInstance.project(p1 as [number, number])
+        const px2 = mapInstance.project(p2 as [number, number])
+        const angle = Math.atan2(px2.y - px1.y, px2.x - px1.x)
+        const color = (f.properties.color as string) || '#000000'
+        const arrowSize = 14 * dpr
+
+        ctx.save()
+        ctx.translate(px2.x * dpr, px2.y * dpr)
+        ctx.rotate(angle + Math.PI / 2)
+        ctx.beginPath()
+        ctx.moveTo(0, -arrowSize)
+        ctx.lineTo(-arrowSize * 0.7, arrowSize * 0.3)
+        ctx.lineTo(arrowSize * 0.7, arrowSize * 0.3)
+        ctx.closePath()
+        ctx.fillStyle = color
+        ctx.fill()
+        ctx.restore()
+      }
+
       // Draw line/polygon label markers at midpoints
       for (const f of currentFeatures.filter(f => f.properties.label && (f.geometry.type === 'LineString' || f.geometry.type === 'Polygon'))) {
         const label = f.properties.label as string