feat: app icon enhancements (#7095)

web/hooks/use-app-favicon.ts

@@ -0,0 +1,23 @@
+import { useAsyncEffect } from 'ahooks'
+import { appDefaultIconBackground } from '@/config'
+import { searchEmoji } from '@/utils/emoji'
+
+export function useAppFavicon(enable: boolean, icon?: string, icon_background?: string) {
+  useAsyncEffect(async () => {
+    if (!enable)
+      return
+    const link: HTMLLinkElement = document.querySelector('link[rel*="icon"]') || document.createElement('link')
+
+    // eslint-disable-next-line prefer-template
+    link.href = 'data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22>'
+            + '<rect width=%22100%25%22 height=%22100%25%22 fill=%22' + encodeURIComponent(icon_background || appDefaultIconBackground) + '%22 rx=%2230%22 ry=%2230%22 />'
+            + '<text x=%2212.5%22 y=%221em%22 font-size=%2275%22>'
+            + (icon ? await searchEmoji(icon) : '🤖')
+            + '</text>'
+            + '</svg>'
+
+    link.rel = 'shortcut icon'
+    link.type = 'image/svg'
+    document.getElementsByTagName('head')[0].appendChild(link)
+  }, [enable, icon, icon_background])
+}