branding: add cropped project icon

Author: ycode-lin

.gitignore

@@ -198,6 +198,7 @@ PublishScripts/
 *.snupkg
 # The packages folder can be ignored because of Package Restore
 **/[Pp]ackages/*
+assets/generated/
 # except build/, which is used as an MSBuild target.
 !**/[Pp]ackages/build/
 # Uncomment if necessary however generally it will be regenerated when needed

YCode.CLI/YCode.CLI.csproj

@@ -16,6 +16,7 @@
 		<Description>YCode is an AI-powered coding agent that operates inside your repository. It provides intelligent code assistance, file operations, and multi-step task management.</Description>
 		<PackageTags>ai;coding-agent;cli;dotnet-tool;developer-tools</PackageTags>
 		<PackageReadmeFile>README.md</PackageReadmeFile>
+		<PackageIcon>icon.png</PackageIcon>
 		<PackageLicenseExpression>MIT</PackageLicenseExpression>
 		<PackageProjectUrl>https://github.com/ycode-lin/YCode.CLI</PackageProjectUrl>
 		<RepositoryUrl>https://github.com/ycode-lin/YCode.CLI</RepositoryUrl>
@@ -35,6 +36,7 @@
 
 	<ItemGroup>
 		<None Include="../README.md" Pack="true" PackagePath="\" />
+		<None Include="icon.png" Pack="true" PackagePath="\" />
 	</ItemGroup>
 
 </Project>

YCode.CLI/icon.png

@@ -102,6 +102,15 @@ code {
   background: linear-gradient(160deg, rgba(255, 250, 241, 0.9), rgba(255, 244, 226, 0.85));
 }
 
+.hero-logo {
+  display: block;
+  width: 92px;
+  height: 92px;
+  margin-bottom: 12px;
+  border-radius: 22px;
+  box-shadow: 0 12px 30px rgba(17, 17, 17, 0.12);
+}
+
 .eyebrow,
 .section-kicker,
 .panel-topline,

docs/assets/favicon-64.png

@@ -11,8 +11,8 @@
   <meta name="theme-color" content="#111111">
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
-  <link rel="icon" type="image/svg+xml" href="./favicon.svg">
-  <link rel="shortcut icon" href="./favicon.svg">
+  <link rel="icon" type="image/png" sizes="64x64" href="./assets/favicon-64.png">
+  <link rel="apple-touch-icon" href="./assets/icon-256.png">
   <link
     href="https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap"
     rel="stylesheet"
@@ -26,6 +26,7 @@
 
     <header class="hero">
       <div class="hero-copy">
+        <img class="hero-logo" src="./assets/icon-256.png" alt="YCode CLI icon">
         <p class="eyebrow">Repository-native coding agent</p>
         <h1>YCode CLI</h1>
         <p class="hero-text">