fix(ui): Auto Router icon not appearing on safari/ios (#3444)

* fix(ui): Auto Router icon not appearing on safari/ios

Closes #3138

* refactor: remove auto-router svg that are no longer in use

src/assets/svg/auto_router.svg

-<svg width="23" height="20" viewBox="0 0 23 20" fill="none" xmlns="http://www.w3.org/2000/svg">
-<defs>
- <linearGradient id="gradient1" x1="0" y1="0" x2="1" y2="0" gradientTransform="rotate(95)">
-    <stop id="stop1" offset="0" stop-color="#2274E2"/>
-    <stop id="stop1" offset="0.5" stop-color="#2274E2"/>
-    <stop id="stop2" offset="1" stop-color="#3FB672" />
-  </linearGradient>
-  </defs>
-<path d="M16 16C10 16 9 10 5 10M16 16C16 17.6569 17.3431 19 19 19C20.6569 19 22 17.6569 22 16C22 14.3431 20.6569 13 19 13C17.3431 13 16 14.3431 16 16ZM5 10C9 10 10 4 16 4M5 10H1.5M16 4C16 5.65685 17.3431 7 19 7C20.6569 7 22 5.65685 22 4C22 2.34315 20.6569 1 19 1C17.3431 1 16 2.34315 16 4Z" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" stroke="url(#gradient1)" />
-</svg>
\ No newline at end of file

src/components/swap/AutoRouterIcon.tsx

+import { useRef } from 'react'
+
+let uniqueId = 0
+const getUniqueId = () => uniqueId++
+
+export default function AutoRouterIcon({ className, id }: { className?: string; id?: string }) {
+  const componentIdRef = useRef(id ?? getUniqueId())
+  const componentId = `AutoRouterIconGradient${componentIdRef.current}`
+
+  return (
+    <svg
+      width="23"
+      height="20"
+      viewBox="0 0 23 20"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+      className={className}
+    >
+      <defs>
+        <linearGradient id={componentId} x1="0" y1="0" x2="1" y2="0" gradientTransform="rotate(95)">
+          <stop id="stop1" offset="0" stopColor="#2274E2" />
+          <stop id="stop1" offset="0.5" stopColor="#2274E2" />
+          <stop id="stop2" offset="1" stopColor="#3FB672" />
+        </linearGradient>
+      </defs>
+      <path
+        d="M16 16C10 16 9 10 5 10M16 16C16 17.6569 17.3431 19 19 19C20.6569 19 22 17.6569 22 16C22 14.3431 20.6569 13 19 13C17.3431 13 16 14.3431 16 16ZM5 10C9 10 10 4 16 4M5 10H1.5M16 4C16 5.65685 17.3431 7 19 7C20.6569 7 22 5.65685 22 4C22 2.34315 20.6569 1 19 1C17.3431 1 16 2.34315 16 4Z"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        stroke={`url(#${componentId})`}
+      />
+    </svg>
+  )
+}

src/components/swap/RouterLabel.tsx

@@ -3,8 +3,8 @@ import useAutoRouterSupported from 'hooks/useAutoRouterSupported'
 import styled from 'styled-components/macro'
 import { ThemedText } from 'theme'
 
-import { ReactComponent as AutoRouterIcon } from '../../assets/svg/auto_router.svg'
 import { ReactComponent as StaticRouterIcon } from '../../assets/svg/static_route.svg'
+import AutoRouterIcon from './AutoRouterIcon'
 
 const StyledAutoRouterIcon = styled(AutoRouterIcon)`
   height: 16px;