feat(console): 背景菜单第三项改名「自定义背景」（二级内上传按钮仍为「上传媒体」）

01_content/src/client/locales.ts

@@ -123,6 +123,7 @@ export const zh = {
   'console.bgPlain': '纯色背景',
   'console.bgGlow': '流光背景',
   'console.bgPhoto': '上传媒体',
+  'console.bgCustom': '自定义背景',
   'console.bgEdit': '背景设置',
   'console.bgEditPlain': '纯色背景设置',
   'console.bgEditGlow': '流光背景设置',
@@ -322,6 +323,7 @@ export const en = {
   'console.bgPlain': 'Plain',
   'console.bgGlow': 'Glow',
   'console.bgPhoto': 'Upload media',
+  'console.bgCustom': 'Custom background',
   'console.bgEdit': 'Background settings',
   'console.bgEditPlain': 'Plain background',
   'console.bgEditGlow': 'Glow background',

01_content/src/client/split.tsx

@@ -1442,7 +1442,7 @@ function ConsolePane() {
                 <button type="button" className="dsh-wt_dropGear" title={T('console.bgEdit')} aria-label={T('console.bgEdit')} onClick={() => setBgEdit('glow')}><SliderIcon /></button>
               </div>
               <div className="dsh-wt_dropRow">
-                <button type="button" className={'dsh-wt_dropItem' + (bg === 'photo' ? ' dsh-wt_dropItemOn' : '')} onClick={() => onBg('photo')}><svg width="13" height="13" viewBox="0 0 16 16" aria-hidden><rect x="2.5" y="3.5" width="11" height="9" rx="1.5" fill="none" stroke="currentColor" strokeWidth="1.2" /><circle cx="5.8" cy="6.6" r="1.1" fill="currentColor" /><path d="M3.2 11.2l2.8-2.8 2.2 2.2 1.8-1.8 2.8 2.4" fill="none" stroke="currentColor" strokeWidth="1.2" /></svg>{T('console.bgPhoto')}</button>
+                <button type="button" className={'dsh-wt_dropItem' + (bg === 'photo' ? ' dsh-wt_dropItemOn' : '')} onClick={() => onBg('photo')}><svg width="13" height="13" viewBox="0 0 16 16" aria-hidden><rect x="2.5" y="3.5" width="11" height="9" rx="1.5" fill="none" stroke="currentColor" strokeWidth="1.2" /><circle cx="5.8" cy="6.6" r="1.1" fill="currentColor" /><path d="M3.2 11.2l2.8-2.8 2.2 2.2 1.8-1.8 2.8 2.4" fill="none" stroke="currentColor" strokeWidth="1.2" /></svg>{T('console.bgCustom')}</button>
                 <button type="button" className="dsh-wt_dropGear" title={T('console.bgEdit')} aria-label={T('console.bgEdit')} onClick={() => setBgEdit('photo')}><SliderIcon /></button>
               </div>
             </div>