//#region src/composables/usePreheader.d.ts interface UsePreheaderOptions { /** * Explicit number of filler sequences to render. When omitted, the count * is auto-derived to fill the 200-char inbox preview budget. */ spaces?: number; } /** * Set the preheader text for the current email template. * * Injects a hidden `

` at the start of `` with the preheader text * followed by filler characters that prevent email clients from pulling * in body content after the preheader. * * Usage in SFC