feat(frontend): add customizable favicon and corner logo with live preview (#218)

* feat(frontend): add customizable favicon and corner logo with live preview

- Add app_logo and app_favicon config fields in config page
- Implement BrandLogo component with URL fallback to SVG logo
- Integrate BrandLogo into all layouts (admin, h5, h5-simple) and navbar
- Add real-time preview for favicon and logo in config page with error state
- Support both relative paths and full image URLs for branding assets
- Sync branding changes (app_name/app_logo/app_favicon) to site config on save

* fix(frontend): preserve tunnel node selection order

* fix(select): use useMemo for option label map to improve performance

vite-frontend/src/components/brand-logo.tsx

@@ -0,0 +1,79 @@
+import { useEffect, useState } from "react";
+
+import { siteConfig, getCachedConfigs } from "@/config/site";
+import { Logo } from "@/components/icons";
+
+type BrandLogoProps = {
+  size?: number;
+  className?: string;
+  alt?: string;
+};
+
+export const BrandLogo = ({
+  size = 24,
+  className,
+  alt = "brand logo",
+}: BrandLogoProps) => {
+  const [logoUrl, setLogoUrl] = useState<string>(siteConfig.app_logo || "");
+  const [imageFailed, setImageFailed] = useState(false);
+
+  useEffect(() => {
+    let mounted = true;
+
+    const syncLogo = async () => {
+      try {
+        const configMap = await getCachedConfigs();
+        const nextLogo = (
+          configMap.app_logo ||
+          siteConfig.app_logo ||
+          ""
+        ).trim();
+
+        if (!mounted) {
+          return;
+        }
+
+        siteConfig.app_logo = nextLogo;
+        setLogoUrl(nextLogo);
+        setImageFailed(false);
+      } catch {
+        if (!mounted) {
+          return;
+        }
+        setLogoUrl((siteConfig.app_logo || "").trim());
+      }
+    };
+
+    void syncLogo();
+
+    const handleConfigUpdate = () => {
+      const nextLogo = (siteConfig.app_logo || "").trim();
+
+      setLogoUrl(nextLogo);
+      setImageFailed(false);
+      void syncLogo();
+    };
+
+    window.addEventListener("configUpdated", handleConfigUpdate);
+
+    return () => {
+      mounted = false;
+      window.removeEventListener("configUpdated", handleConfigUpdate);
+    };
+  }, []);
+
+  if (!logoUrl || imageFailed) {
+    return <Logo className={className} size={size} />;
+  }
+
+  return (
+    <img
+      alt={alt}
+      className={className}
+      height={size}
+      src={logoUrl}
+      width={size}
+      onError={() => setImageFailed(true)}
+    />
+  );
+};

vite-frontend/src/components/navbar.tsx

@@ -7,7 +7,7 @@ import {
   NavbarBrand,
   NavbarContent,
 } from "@/shadcn-bridge/heroui/navbar";
-import { Logo } from "@/components/icons";
+import { BrandLogo } from "@/components/brand-logo";
 import { siteConfig, getCachedConfig } from "@/config/site";
 import { useWebViewMode } from "@/hooks/useWebViewMode";
 
@@ -69,7 +69,7 @@ export const Navbar = () => {
               color="foreground"
               href="/"
             >
-              <Logo size={24} />
+              <BrandLogo size={24} />
               <p className="font-bold text-inherit truncate">{appName}</p>
             </Link>
           </NavbarBrand>