Merge pull request 'feat: add favicon for browser tab' (#4) from dev into main

dashboard/frontend/index.html

@@ -5,6 +5,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <meta name="description" content="Personal NAS Dashboard — manage Docker, Git repos, files, and media from one place">
   <title>NAS Dashboard</title>
+  <link rel="icon" type="image/svg+xml" href="/favicon.svg">
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
   <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap" rel="stylesheet">

dashboard/frontend/public/favicon.svg

@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
+  <rect width="32" height="32" rx="6" fill="#3b82f6"/>
+  <rect x="6" y="8" width="20" height="16" rx="2" fill="#fff" opacity="0.9"/>
+  <rect x="9" y="12" width="6" height="2" rx="1" fill="#3b82f6"/>
+  <rect x="9" y="16" width="6" height="2" rx="1" fill="#3b82f6"/>
+  <rect x="9" y="20" width="6" height="2" rx="1" fill="#3b82f6"/>
+  <circle cx="22" cy="20" r="2" fill="#3b82f6"/>
+</svg>