Add properly sized favicon set for browsers that skip oversized icons

ROADMAP.md

@@ -266,3 +266,5 @@ Roughly in priority order:
 `v0.16.70` fixes the Access Logs table (Administration > Logs, "Access requests"), the last page still on its own pre-unification CSS: `.log-table` pinned the Status and Duration columns with `position:sticky` and drew a divider `box-shadow` on each -- a horizontal-scroll affordance none of the other log-type pages use -- and left the Request column at a fixed width instead of stretching to fill the panel, so wide viewports showed an empty gap past Duration. Both are removed: the two trailing columns are back in normal table flow, and Request now takes `width:auto` to absorb the remaining space, matching how Gateway Events, Backup history, and the Audit log already size their last column. Purely a CSS change -- no markup, data, or behavior changes.
 
 `v0.16.71` fixes a Gateway Events / Audit log message that slipped past v0.16.66: the Hosted Site file-upload route ("Replace files") still wrote the old, un-prefixed `Files replaced for "<name>".` line instead of the `Hosted site "<name>" ...` convention every other Hosted Site action uses (created, enabled/disabled, deleted, and the field-level update summaries). It lived in its own route separate from the four `PATCH` handlers v0.16.66 touched, so it was missed at the time and only noticed once a user pointed out the log entry gave no way to tell which route type it belonged to. Now reads `Hosted site "<name>" files replaced.`, matching the rest.
+
+`v0.16.72` fixes the favicon not appearing in some Chromium-family browsers (reported: DuckDuckGo's browser showed the default globe icon while Safari showed the real one correctly). The app previously declared a single `<link rel="icon">` pointing straight at the 1018x1001, 396 KB source PNG with no `sizes` attribute and no `/favicon.ico` fallback -- Safari is forgiving about oversized, unsized favicons, but some Chromium-based browsers silently skip one that large rather than downscale it, and several also probe `/favicon.ico` directly regardless of what the `<link>` tag says. Added properly sized `favicon.ico` (16/32px, multi-size), standalone `favicon-16.png`/`favicon-32.png` with `sizes` attributes, and a 180x180 `apple-touch-icon.png`, all generated from the existing approved icon artwork and served automatically by the existing static file handler -- no server route or icon design changes.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "site-gateway",
-  "version": "0.16.71",
+  "version": "0.16.72",
   "private": true,
   "description": "Site Gateway: simple self-hosted website publishing, reverse proxying, and automatic HTTPS.",
   "type": "module",

src/public/index.html

@@ -7,8 +7,11 @@
   <meta name="color-scheme" content="dark">
   <title>Site Gateway</title>
   <meta name="description" content="Host sites, proxy services, and manage HTTPS from one simple dashboard.">
-  <link rel="icon" type="image/png" href="/site-gateway-icon-approved.png">
-  <link rel="stylesheet" href="/styles.css?v=0.16.71">
+  <link rel="icon" type="image/x-icon" href="/favicon.ico">
+  <link rel="icon" type="image/png" sizes="16x16" href="/favicon-16.png">
+  <link rel="icon" type="image/png" sizes="32x32" href="/favicon-32.png">
+  <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
+  <link rel="stylesheet" href="/styles.css?v=0.16.72">
 </head>
 
 <!-- ================================================================
@@ -451,6 +454,6 @@
   <div id="toast" class="toast" role="status"></div>
   <div id="update-banner" class="update-banner hidden" role="status"><span>A new version of Site Gateway is available.</span><div class="update-banner-actions"><button id="update-banner-refresh" class="button primary">Refresh</button><button id="update-banner-dismiss" class="text-button">Dismiss</button></div></div>
   <!-- App scripts: core (app.js) then extended views/admin (features.js) -->
-  <script src="/app.js?v=0.16.71" defer></script><script src="/features.js?v=0.16.71" defer></script><script src="/select-enhance.js?v=0.16.71" defer></script>
+  <script src="/app.js?v=0.16.72" defer></script><script src="/features.js?v=0.16.72" defer></script><script src="/select-enhance.js?v=0.16.72" defer></script>
 </body>
 </html>