feat(branding): default both site logos to assets/img/logo.png

- Point 站点 Logo / 暗色模式 Logo schema defaults (PHP + VUE) and the
  Settings::logo_url() fallback at assets/img/logo.png.
- Point the footer night image default at the same file.
- Remove logo_dark.png and the now-unreferenced assets/icons/default-logo.svg
  along with the private default_asset_url() helper that was its only reader.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

assets/admin/src/schema/sections/global/logo.js

@@ -1,6 +1,7 @@
 const themeRoot = typeof window !== 'undefined' && window.jioAdminData?.themeUri
   ? String(window.jioAdminData.themeUri).replace(/\/$/, '')
   : ''
+const defaultLogo = themeRoot ? `${themeRoot}/assets/img/logo.png` : ''
 const defaultFavicon = themeRoot ? `${themeRoot}/assets/img/favicon.png` : ''
 
 export const logoSchema = {
@@ -9,8 +10,8 @@ export const logoSchema = {
   icon: 'fa fas fa-image',
   description: '管理站点 Logo、站点图标和品牌标识。',
   defaults: {
-    site_logo: '',
-    site_logo_dark: '',
+    site_logo: defaultLogo,
+    site_logo_dark: defaultLogo,
     site_favicon: defaultFavicon,
     site_icon: defaultFavicon,
     logo_text: '',
@@ -21,8 +22,8 @@ export const logoSchema = {
       title: 'Logo 设置',
       icon: 'fa fas fa-image',
       fields: [
-        { key: 'site_logo', label: '站点 Logo', type: 'media', help: '建议尺寸 300x80，支持 PNG/SVG 透明背景' },
-        { key: 'site_logo_dark', label: '暗色模式 Logo', type: 'media', help: '暗色模式下显示的 Logo，留空则使用默认 Logo' },
+        { key: 'site_logo', label: '站点 Logo', type: 'media', default: defaultLogo, help: '建议尺寸 300x80，支持 PNG/SVG 透明背景' },
+        { key: 'site_logo_dark', label: '暗色模式 Logo', type: 'media', default: defaultLogo, help: '暗色模式下显示的 Logo，留空则使用默认 Logo' },
         { key: 'logo_text', label: 'Logo 文字', type: 'input', placeholder: '当无 Logo 图片时显示的文字', help: '同时作为首页标题和 alt 文本使用' },
       ],
     },

assets/icons/default-logo.svg

@@ -1,9 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 60" width="200" height="60">
-  <defs>
-    <linearGradient id="g" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" style="stop-color:#f04494"/>
-      <stop offset="100%" style="stop-color:#ae53f3"/>
-    </linearGradient>
-  </defs>
-  <text x="10" y="42" font-family="system-ui,-apple-system,sans-serif" font-size="32" font-weight="700" fill="url(#g)">Jio</text>
-</svg>

src/Admin/Schema/GlobalSchema.php

@@ -156,8 +156,8 @@ class GlobalSchema {
                     'option_key' => 'jio_settings',
                     'groups'     => [
                         ['key' => 'logo', 'title' => 'Logo 设置', 'fields' => [
-                            ['key' => 'site_logo', 'label' => '站点 Logo', 'type' => 'media', 'default' => ''],
-                            ['key' => 'site_logo_dark', 'label' => '暗色模式 Logo', 'type' => 'media', 'default' => ''],
+                            ['key' => 'site_logo', 'label' => '站点 Logo', 'type' => 'media', 'default' => get_template_directory_uri() . '/assets/img/logo.png'],
+                            ['key' => 'site_logo_dark', 'label' => '暗色模式 Logo', 'type' => 'media', 'default' => get_template_directory_uri() . '/assets/img/logo.png'],
                             ['key' => 'logo_text', 'label' => 'Logo 文字', 'type' => 'input', 'default' => ''],
                         ]],
                         ['key' => 'favicon', 'title' => '站点图标', 'fields' => [

src/Admin/Schema/SchemaPageDisplay.php

@@ -83,7 +83,7 @@ class SchemaPageDisplay {
 			self::field('fcode_template', '页脚布局模板选择', 'image_select', 'template_1', ['previewWidth' => 240, 'options' => [['label' => '模板一', 'value' => 'template_1', 'image' => self::asset('assets/images/footer/fcode_template_1.png')]]]),
 			self::field('footer_t1_m_s', '版块一移动端显示', 'switcher', false),
 			self::field('footer_t1_img', '日间模式图片', 'upload', $img . 'logo.png'),
-			self::field('footer_t1_img_dark', '夜间模式图片', 'upload', $img . 'logo_dark.png'),
+			self::field('footer_t1_img_dark', '夜间模式图片', 'upload', $img . 'logo.png'),
 			self::field('footer_t1_t', '首行文字', 'text', ''),
 			self::field('fcode_t1_code', '更多内容', 'textarea', 'Jio 主题专为博客、自媒体、资讯类的网站设计开发，简约优雅的设计风格，全面的前端用户功能，简单的模块化配置，欢迎您的体验', ['sanitize_type' => 'html', 'rows' => 3]),
 			self::field('fcode_t2_code_1', '版块二第一行', 'textarea', '<a href="#">友链申请</a>' . "\n" . '<a href="#">免责声明</a>' . "\n" . '<a href="#">广告合作</a>' . "\n" . '<a href="#">关于我们</a>', ['sanitize_type' => 'html', 'rows' => 4]),

src/Settings/AuthReader.php

@@ -20,15 +20,10 @@ trait AuthReader {
         return !self::close_signup();
     }
 
-    /** 主题内置默认图片 URL */
-    private static function default_asset_url(string $filename): string {
-        return get_template_directory_uri() . '/assets/icons/' . $filename;
-    }
-
     /** 获取 Logo URL（留空时使用内置默认） */
     public static function logo_url(): string {
         $url = trim((string) self::get_value('site_logo', ''));
-        return $url !== '' ? $url : self::default_asset_url('default-logo.svg');
+        return $url !== '' ? $url : get_template_directory_uri() . '/assets/img/logo.png';
     }
 
     /** 获取暗色模式 Logo URL（留空时跟随浅色模式） */

tests/widget-system/icon-picker-contract.test.cjs

@@ -164,10 +164,10 @@ test('brand icons render despite the legacy fa-fab double prefix', () => {
 });
 
 test('icon assets are consolidated and dead icon assets are gone', () => {
-  for (const file of ['assets/icons/upload-add.svg', 'assets/icons/default-favicon.svg', 'assets/icons/default-logo.svg', 'assets/icons/playing.svg', 'assets/icons/user-certification.svg']) {
+  for (const file of ['assets/icons/upload-add.svg', 'assets/icons/default-favicon.svg', 'assets/icons/playing.svg', 'assets/icons/user-certification.svg']) {
     assert.ok(fs.existsSync(path.join(root, file)), `${file} exists`);
   }
-  for (const file of ['assets/img/upload-add.svg', 'assets/img/vip-1.svg', 'assets/img/vip-2.svg', 'assets/img/404.svg', 'assets/img/msg-system.svg', 'assets/fonts/img-code.ttf', 'assets/js/runtime/gutenberg-extend.js', 'assets/fontawesome5/webfonts/fa-solid-900.ttf']) {
+  for (const file of ['assets/img/upload-add.svg', 'assets/img/logo_dark.png', 'assets/icons/default-logo.svg', 'assets/img/vip-1.svg', 'assets/img/vip-2.svg', 'assets/img/404.svg', 'assets/img/msg-system.svg', 'assets/fonts/img-code.ttf', 'assets/js/runtime/gutenberg-extend.js', 'assets/fontawesome5/webfonts/fa-solid-900.ttf']) {
     assert.ok(!fs.existsSync(path.join(root, file)), `${file} removed`);
   }
   const mainCss = read('assets/css/main.css');