feat(branding): default the site icons to assets/img/favicon.png

- Point the 浏览器图标 / 移动端图标 schema defaults (PHP + VUE) at
  assets/img/favicon.png instead of an empty media field.
- Fall back to the same PNG in Settings::favicon_url() when no custom
  favicon and no native site_icon are configured.
- Add Settings::mobile_icon_url() and emit apple-touch-icon from SEOHead;
  the 移动端图标 field previously had no consumer and never reached the page.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
kate522andClaude Opus 5 committed 2026-11-05 17:00:50 +08:00
1 parent b56b9bbe37
commit 3ce5bfc20c
5 files changed
+27 -8

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