feat(email): mentorship senders forward contacts/note, return success

sendMentorBulkAssignmentEmail now accepts optional teamMembers per project
and a customNote, forwards both to the template, switches to getBaseUrl(),
and returns Promise<boolean> (true on success, false on empty/error).

sendTeamMentorIntroductionEmail now accepts optional teammates and customNote,
forwards both to the template, switches to getBaseUrl(), and returns
Promise<boolean> (true on success, false on empty/error).

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

src/lib/email.ts

@@ -2959,16 +2959,20 @@ export async function sendTeamMentorIntroductionEmail(
   projectTitle: string,
   projectId: string,
   mentors: { name: string | null; email: string }[],
-): Promise<void> {
+  teammates?: { name: string | null; email: string }[],
+  customNote?: string,
+): Promise<boolean> {
   try {
-    if (mentors.length === 0) return
-    const baseUrl = (process.env.NEXTAUTH_URL || 'https://monaco-opc.com').replace(/\/$/, '')
+    if (mentors.length === 0) return false
+    const baseUrl = getBaseUrl()
     const workspaceUrl = `${baseUrl}/applicant/mentor`
     const template = getTeamMentorIntroductionTemplate(
       recipientName,
       projectTitle,
       mentors,
       workspaceUrl,
+      teammates,
+      customNote,
     )
     await sendEmail({
       to: recipientEmail,
@@ -2976,8 +2980,10 @@ export async function sendTeamMentorIntroductionEmail(
       text: template.text,
       html: template.html,
     })
+    return true
   } catch (error) {
     console.error('[sendTeamMentorIntroductionEmail] failed', { recipientEmail, projectId, error })
+    return false
   }
 }
 
@@ -3095,23 +3101,23 @@ export function getMentorBulkAssignmentTemplate(
 export async function sendMentorBulkAssignmentEmail(
   email: string,
   name: string | null,
-  projects: { id: string; title: string }[],
-): Promise<void> {
+  projects: { id: string; title: string; teamMembers?: { name: string | null; email: string }[] }[],
+  customNote?: string,
+): Promise<boolean> {
   try {
-    if (projects.length === 0) return
-    const baseUrl = (process.env.NEXTAUTH_URL || 'https://monaco-opc.com').replace(/\/$/, '')
+    if (projects.length === 0) return false
+    const baseUrl = getBaseUrl()
     const enriched = projects.map((p) => ({
       title: p.title,
       url: `${baseUrl}/mentor/workspace/${p.id}`,
+      teamMembers: p.teamMembers,
     }))
-    const template = getMentorBulkAssignmentTemplate(
-      name || '',
-      enriched,
-      `${baseUrl}/mentor`,
-    )
+    const template = getMentorBulkAssignmentTemplate(name || '', enriched, `${baseUrl}/mentor`, customNote)
     await sendEmail({ to: email, subject: template.subject, text: template.text, html: template.html })
+    return true
   } catch (error) {
     console.error('[sendMentorBulkAssignmentEmail] failed', { email, error })
+    return false
   }
 }