Add host welcome/reset emails, email field, and /host URL; v2.0.7

- Host accounts now have an optional email field
- Creating a host with an email sends a welcome email with the portal
  URL, username, and password via Resend
- Resetting a password also emails the new credentials if the host
  has an email on file; admin sees a confirmation either way
- Admin panel shows email column and confirmation messages
- Portal URL changed from /host-upload to /host

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/email.js

@@ -764,3 +764,44 @@ export async function sendNuggetsUploadNotification({ to, source, hostName, epis
     console.error('[nuggets-notify] send exception:', err)
   }
 }
+
+export async function sendNuggetsHostWelcomeEmail({ to, name, username, password, portalUrl }) {
+  if (!process.env.RESEND_API_KEY || !to) return
+  const resend = new Resend(process.env.RESEND_API_KEY)
+  const from = process.env.RESEND_FROM ?? DEFAULT_RESEND_FROM
+
+  const bodyHtml = `
+    <p style="margin:0 0 14px;font-family:Arial,sans-serif;font-size:15px;color:#2c2417;">Hi ${escapeHtml(name)},</p>
+    <p style="margin:0 0 20px;font-family:Arial,sans-serif;font-size:15px;color:#2c2417;">
+      You've been set up as a host on the <strong>Nuggets</strong> episode upload portal.
+      Use the details below to sign in and submit your episodes.
+    </p>
+    <table style="width:100%;border-collapse:collapse;font-family:Arial,sans-serif;font-size:14px;color:#2c2417;margin-bottom:20px;">
+      <tr><td style="padding:8px 12px;background:#faf9f7;border:1px solid #e5e0d5;border-radius:4px;color:#7a7060;width:110px;">Portal URL</td><td style="padding:8px 12px;background:#faf9f7;border:1px solid #e5e0d5;"><a href="${escapeHtml(portalUrl)}" style="color:#c8a96e;">${escapeHtml(portalUrl)}</a></td></tr>
+      <tr><td style="padding:8px 12px;background:#faf9f7;border:1px solid #e5e0d5;color:#7a7060;">Username</td><td style="padding:8px 12px;background:#faf9f7;border:1px solid #e5e0d5;font-family:monospace;font-weight:700;">${escapeHtml(username)}</td></tr>
+      <tr><td style="padding:8px 12px;background:#faf9f7;border:1px solid #e5e0d5;color:#7a7060;">Password</td><td style="padding:8px 12px;background:#faf9f7;border:1px solid #e5e0d5;font-family:monospace;font-weight:700;">${escapeHtml(password)}</td></tr>
+    </table>
+    <p style="margin:0 0 10px;font-family:Arial,sans-serif;font-size:14px;color:#2c2417;">When you're ready to submit an episode, fill in the episode name, the Bible passage, a short description, and attach your audio file. Everything uploads in one step.</p>
+    <p style="margin:0;font-family:Arial,sans-serif;font-size:14px;color:#7a7060;">If you have any trouble signing in, reply to this email and we'll get you sorted.</p>
+  `
+
+  try {
+    const { error } = await resend.emails.send({
+      from,
+      to: [to],
+      subject: 'Your Nuggets Host Upload Portal Access',
+      text: `Hi ${name},\n\nYou've been set up as a host on the Nuggets episode upload portal.\n\nPortal URL: ${portalUrl}\nUsername: ${username}\nPassword: ${password}\n\nWhen submitting an episode, fill in the episode name, Bible passage, a short description, and attach your audio file.\n\nIf you have any trouble, reply to this email.`,
+      html: buildBrandedEmailHtml({
+        title: 'Upload Portal Access',
+        eyebrow: 'Nuggets',
+        bodyHtml,
+        ctaLabel: 'Open Upload Portal',
+        ctaUrl: portalUrl,
+        footerHtml: '<p style="margin:0;font-family:Arial,sans-serif;font-size:12px;color:#7a7060;">You received this because an admin created an upload account for you on the Nuggets podcast portal.</p>',
+      }),
+    })
+    if (error) console.error('[nuggets-welcome] send error:', error)
+  } catch (err) {
+    console.error('[nuggets-welcome] send exception:', err)
+  }
+}