feat: label settings as Advanced, add GitHub source link footer

Author: bakerboy448

index.html

@@ -263,6 +263,16 @@
       line-height: 1.7;
     }
 
+    .footer {
+      text-align: center;
+      margin-top: 1.5rem;
+      padding-top: 1rem;
+      border-top: 1px solid var(--border);
+      font-size: 0.85rem;
+    }
+
+    .footer a { color: var(--text); }
+
     .hidden { display: none !important; }
   </style>
 </head>

src/main.ts

@@ -110,7 +110,7 @@ function renderStats(stats: { redactedEnvVars: number; redactedEmails: number; a
 function buildSettingsPanel(config: SanitizerConfig, onSave: (c: SanitizerConfig) => void): HTMLElement {
   const details = el('details', { className: 'settings' })
   const summary = el('summary')
-  summary.textContent = 'Settings'
+  summary.textContent = 'Advanced Settings'
   details.appendChild(summary)
 
   const form = el('div', { className: 'settings-form' })
@@ -258,6 +258,17 @@ function init(): void {
   // Full disclaimer
   app.appendChild(createFullDisclaimer())
 
+  // Source code link
+  const footer = el('div', { className: 'footer' })
+  const sourceLink = el('a', {
+    href: 'https://github.com/bakerboy448/compose-sanitizer',
+    target: '_blank',
+    rel: 'noopener noreferrer',
+  })
+  sourceLink.textContent = 'Source code on GitHub'
+  footer.appendChild(sourceLink)
+  app.appendChild(footer)
+
   // Sanitize handler
   sanitizeBtn.addEventListener('click', () => {
     const raw = input.value