feat: Firmenname aus .env in E-Mail-Titeln anzeigen

- COMPANY_NAME wird aus .env gelesen
- Wird in separater Zeile über dem eigentlichen Titel angezeigt
- Format: Firmenname (grau, kleiner) + Titel (pink, größer)
- Fallback auf 'Stargirlnails Kiel' wenn nicht gesetzt

src/server/lib/email-templates.ts

@@ -33,14 +33,16 @@ async function renderBrandedEmail(title: string, bodyHtml: string): Promise<stri
   
   const instagramProfile = process.env.INSTAGRAM_PROFILE;
   const tiktokProfile = process.env.TIKTOK_PROFILE;
+  const companyName = process.env.COMPANY_NAME || 'Stargirlnails Kiel';
   
   return `
   <div style="font-family: Arial, sans-serif; color: #0f172a; background:#fdf2f8; padding:24px;">
     <table role="presentation" width="100%" cellspacing="0" cellpadding="0" style="max-width:640px; margin:0 auto; background:#ffffff; border-radius:12px; overflow:hidden; box-shadow:0 1px 3px rgba(0,0,0,0.06)">
       <tr>
         <td style="padding:24px 24px 0 24px; text-align:center;">
-          ${logo ? `<img src="${logo}" alt="Stargirlnails" style="width:120px; height:auto; display:inline-block;" />` : `<div style=\"font-size:24px\">💅</div>`}
-          <h1 style="margin:16px 0 0 0; font-size:22px; color:#db2777;">${title}</h1>
+          ${logo ? `<img src="${logo}" alt="${companyName}" style="width:120px; height:auto; display:inline-block;" />` : `<div style=\"font-size:24px\">💅</div>`}
+          <div style="margin:16px 0 4px 0; font-size:16px; font-weight:600; color:#64748b;">${companyName}</div>
+          <h1 style="margin:0; font-size:22px; color:#db2777;">${title}</h1>
         </td>
       </tr>
       <tr>