feat(i18n): sidebar menu locale, invoice keys, and related fixes

Sidebar/header: add utils/menuI18n.js (getMenuDisplayName) so menu labels use route meta.title via $t when available; update layout-sidebar and layout DOM matching.

Invoice: constants use i18nKey; list.vue computed invoiceStatusTabItems/invoiceSourceOptions; listSchema options; pointmall orderList uses $t(i18nKey) and invoiceStatusText.

Other: saleCategory PLATFORM-only switches; order detail show section for suppliers; store-shop, goods, decorate, wxapp, merchant, mallList, sp-picker, sellers route, datacube order, params; locale JSON updates.

Repo: stop ignoring .cursor (track skills/commit-summary/agents); minor package.json/lock and i18n lang index.
Made-with: Cursor

package.json

@@ -139,4 +139,4 @@
     "jugglingdb-nano": "0.0.1",
     "global": "2.0.1"
   }
-}
+}