Add favicon from RealFaviconGenerator

Downloads and integrates favicon assets (SVG, PNG, ICO, Apple touch icon,
web app manifest icons) and wires them up via Next.js metadata API in the
root layout.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/favicon.svg

@@ -1,56 +1,10 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   width="24"
-   height="24"
-   viewBox="0 0 24 24"
-   fill="none"
-   stroke="currentColor"
-   stroke-width="2"
-   stroke-linecap="round"
-   stroke-linejoin="round"
-   class="lucide lucide-chart-column w-5 h-5 text-primary"
-   version="1.1"
-   id="svg4"
-   sodipodi:docname="favicon.svg"
-   inkscape:version="1.4.2 (ebf0e940d0, 2025-05-08)"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:svg="http://www.w3.org/2000/svg">
-  <defs
-     id="defs4" />
-  <sodipodi:namedview
-     id="namedview4"
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1.0"
-     inkscape:showpageshadow="2"
-     inkscape:pageopacity="0.0"
-     inkscape:pagecheckerboard="0"
-     inkscape:deskcolor="#d1d1d1"
-     inkscape:zoom="34.75"
-     inkscape:cx="11.985612"
-     inkscape:cy="12"
-     inkscape:window-width="1920"
-     inkscape:window-height="1051"
-     inkscape:window-x="0"
-     inkscape:window-y="17"
-     inkscape:window-maximized="1"
-     inkscape:current-layer="svg4" />
-  <path
-     d="M3 3v16a2 2 0 0 0 2 2h16"
-     id="path1"
-     style="stroke:#2258c3;stroke-opacity:1" />
-  <path
-     d="M18 17V9"
-     id="path2"
-     style="stroke:#2258c3;stroke-opacity:1" />
-  <path
-     d="M13 17V5"
-     id="path3"
-     style="stroke:#2258c3;stroke-opacity:1" />
-  <path
-     d="M8 17v-3"
-     id="path4"
-     style="stroke:#2258c3;stroke-opacity:1" />
-</svg>
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" width="24" height="24"><svg xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink" width="24" height="24"><svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-chart-column w-5 h-5 text-primary" version="1.1" id="svg4" sodipodi:docname="favicon.svg" inkscape:version="1.4.2 (ebf0e940d0, 2025-05-08)" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg">
+  <defs id="defs4"></defs>
+  <sodipodi:namedview id="namedview4" pagecolor="#ffffff" bordercolor="#666666" borderopacity="1.0" inkscape:showpageshadow="2" inkscape:pageopacity="0.0" inkscape:pagecheckerboard="0" inkscape:deskcolor="#d1d1d1" inkscape:zoom="34.75" inkscape:cx="11.985612" inkscape:cy="12" inkscape:window-width="1920" inkscape:window-height="1051" inkscape:window-x="0" inkscape:window-y="17" inkscape:window-maximized="1" inkscape:current-layer="svg4"></sodipodi:namedview>
+  <path d="M3 3v16a2 2 0 0 0 2 2h16" id="path1" style="stroke:#2258c3;stroke-opacity:1"></path>
+  <path d="M18 17V9" id="path2" style="stroke:#2258c3;stroke-opacity:1"></path>
+  <path d="M13 17V5" id="path3" style="stroke:#2258c3;stroke-opacity:1"></path>
+  <path d="M8 17v-3" id="path4" style="stroke:#2258c3;stroke-opacity:1"></path>
+</svg></svg><style>@media (prefers-color-scheme: light) { :root { filter: none; } }
+@media (prefers-color-scheme: dark) { :root { filter: none; } }
+</style></svg>

public/site.webmanifest

@@ -0,0 +1,21 @@
+{
+  "name": "Candle Annotator",
+  "short_name": "Candle Annotator",
+  "icons": [
+    {
+      "src": "/web-app-manifest-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "maskable"
+    },
+    {
+      "src": "/web-app-manifest-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ],
+  "theme_color": "#ffffff",
+  "background_color": "#ffffff",
+  "display": "standalone"
+}

src/app/layout.tsx

@@ -21,6 +21,18 @@ const jetbrainsMono = JetBrains_Mono({
 export const metadata: Metadata = {
   title: "Candle Annotator",
   description: "Annotate candlestick charts for ML training",
+  icons: {
+    icon: [
+      { url: "/favicon.ico", rel: "shortcut icon" },
+      { url: "/favicon-96x96.png", sizes: "96x96", type: "image/png" },
+      { url: "/favicon.svg", type: "image/svg+xml" },
+    ],
+    apple: [{ url: "/apple-touch-icon.png", sizes: "180x180" }],
+  },
+  manifest: "/site.webmanifest",
+  appleWebApp: {
+    title: "Candle Annotator",
+  },
 };
 
 export default function RootLayout({