diff --git a/apps/ops/src/components/shared/ConversationPanel.vue b/apps/ops/src/components/shared/ConversationPanel.vue
index 82e4082..9c701cc 100644
--- a/apps/ops/src/components/shared/ConversationPanel.vue
+++ b/apps/ops/src/components/shared/ConversationPanel.vue
@@ -1430,9 +1430,9 @@ function formatDate (dateStr) {
 
 <style scoped>
 /* Courriel complet : carte large + iframe sandbox (rendu WYSIWYG) */
-.email-card { width: 100%; border: 1px solid #e2e8f0; border-radius: 10px; background: #fff; overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,.05); }
+.email-card { width: 100%; border: 0; border-radius: 0; background: transparent; overflow: hidden; }
 .email-card-agent { border-color: #c7d2fe; background: #f5f7ff; }
-.email-card-head { display: flex; align-items: center; padding: 5px 10px; background: #f8fafc; border-bottom: 1px solid #eef2f7; }
+.email-card-head { display: flex; align-items: center; padding: 2px 0; background: transparent; }
 .email-card-agent .email-card-head { background: #eef2ff; }
 .email-frame { width: 100%; height: 300px; border: 0; background: #fff; display: block; }
 .pay-card { margin: 6px 8px; padding: 8px 10px; border: 1px solid #bbf7d0; background: #f0fdf4; border-radius: 8px; }
@@ -1462,14 +1462,15 @@ function formatDate (dateStr) {
   gap: 6px;
   height: calc(100vh - 100px);
 }
-.conv-msg { display: block; width: 100%; } /* accordéon → message pleine largeur (l'alignement bulle est géré dans .msg-body) */
+.conv-msg { display: block; width: 100%; border-top: 1px solid #eceff3; } /* séparateur UNIQUE entre messages (style Gmail) — pas de boîte arrondie autour de chaque message */
+.conv-msg:first-child { border-top: none; }
 .conv-msg-customer { justify-content: flex-start; }
 .conv-msg-agent { justify-content: flex-end; }
 .conv-msg-system { justify-content: center; }
 /* En-tête repliable (accordéon style Gmail) */
-.msg-head { display: block; width: 100%; padding: 5px 8px; cursor: pointer; border-radius: 6px; transition: background .12s; }
-.msg-head:hover { background: #f1f5f9; }
-.msg-head-open { background: #eef2ff; }
+.msg-head { display: block; width: 100%; padding: 6px 4px; cursor: pointer; transition: background .12s; }
+.msg-head:hover { background: #f8fafc; }
+.msg-head-open { background: transparent; }
 .msg-head-line1 { font-size: 0.82rem; line-height: 1.2; }
 .msg-who { font-weight: 600; color: #1e293b; }
 .msg-time { color: #94a3b8; font-size: 0.72rem; white-space: nowrap; }
diff --git a/services/targo-hub/lib/conversation.js b/services/targo-hub/lib/conversation.js
index 6b65e2e..bf4c663 100644
--- a/services/targo-hub/lib/conversation.js
+++ b/services/targo-hub/lib/conversation.js
@@ -122,7 +122,7 @@ async function notifyCustomer (conv, message) {
       const gmail = require('./gmail')
       const base = conv.lastSubject || conv.subject || ''
       const subj = withTicketTag(conv, /^re\s*:/i.test(base) ? base : ('Re: ' + base))
-      const r = await gmail.sendMessage({ to: conv.email, subject: subj, body: message.text || '', html: message.html || '', threadId: conv.threadId, inReplyTo: conv.lastMessageId })
+      const r = await gmail.sendMessage({ to: conv.email, subject: subj, body: message.text || '', html: message.html || '', threadId: conv.threadId, inReplyTo: conv.lastMessageId, from: agentSendFrom(message.agent) })
       if (r && r.id) conv.lastGmailId = r.id
       log(`Email reply sent for conv ${conv.token} → ${conv.email} (gmail ${r.id})`)
       return 'email'
@@ -287,6 +287,19 @@ function fromDisplayName (from) {
   n = n.replace(/^['"]|['"]$/g, '').trim()
   return (n && !/@/.test(n)) ? n.slice(0, 80) : ''
 }
+// Nom d'affichage de l'agent pour le From sortant, dérivé de son courriel SSO : gilles.drolet@targo.ca → « Gilles Drolet » (gilles@ → « Gilles »).
+function agentDisplayName (email) {
+  const local = String(email || '').split('@')[0]
+  return local.split(/[._-]+/).filter(Boolean).map(p => p.charAt(0).toUpperCase() + p.slice(1)).join(' ')
+}
+// From sortant PERSONNALISÉ : « Gilles Drolet » <support@targo.ca>. L'ADRESSE reste l'alias surveillé (les réponses reviennent dans l'inbox partagé) ; seul le nom affiché change. Sans nom/agent → undefined ⇒ défaut Gmail (« Service TARGO »).
+function agentSendFrom (email) {
+  const name = agentDisplayName(email)
+  if (!name) return undefined
+  const base = require('./gmail').sendFrom()
+  const addr = (String(base).match(/<([^>]+)>/) || [null, base])[1].trim()
+  return `"${name.replace(/["<>]/g, '')}" <${addr}>`
+}
 function ingestGuard (email, subject) {
   const s = String(subject || '')
   const e = String(email || '').trim()
@@ -724,7 +737,7 @@ async function sendSms ({ phone, customer, customerName, message, media } = {})
 }
 
 // Compose un NOUVEAU courriel SORTANT (≠ réponse) : envoie via Gmail + crée/append une conversation EMAIL suivie.
-async function sendNewEmail ({ to, subject, body, html, customer, customerName } = {}) {
+async function sendNewEmail ({ to, subject, body, html, customer, customerName, agentEmail } = {}) {
   const triage = require('./inbox-triage')
   const dest = triage.extractEmail(to) || String(to || '').trim()
   if (!dest || !/.+@.+\..+/.test(dest)) return { ok: false, error: 'destinataire courriel invalide' }
@@ -732,11 +745,11 @@ async function sendNewEmail ({ to, subject, body, html, customer, customerName }
   let conv = findConversationByEmail(dest)
   if (!conv) { conv = createConversation({ phone: null, customer: customer || null, customerName: customerName || dest, subject: subject || 'Courriel' }); conv.channel = 'email'; conv.email = dest }
   // réponse dans le fil si la conversation existe déjà (threadId connu)
-  const r = await gmail.sendMessage({ to: dest, subject: withTicketTag(conv, subject || conv.lastSubject || '(sans objet)'), body: body || '', html: html || '', threadId: conv.threadId, inReplyTo: conv.lastMessageId })
+  const r = await gmail.sendMessage({ to: dest, subject: withTicketTag(conv, subject || conv.lastSubject || '(sans objet)'), body: body || '', html: html || '', threadId: conv.threadId, inReplyTo: conv.lastMessageId, from: agentSendFrom(agentEmail) })
   if (r && r.threadId) conv.threadId = r.threadId
   if (r && r.id) conv.lastGmailId = r.id
   conv.lastSubject = subject || conv.lastSubject
-  const m = addMessage(conv, { from: 'agent', text: (body || ''), via: 'email', html: html || '' })
+  const m = addMessage(conv, { from: 'agent', text: (body || ''), via: 'email', html: html || '', agent: agentEmail || '' })
   if (conv.linkedTickets && conv.linkedTickets.length) logToLinkedTicket(conv, m, subject).catch(() => {})
   conv.lastHumanDate = todayET(); saveToDisk()
   log(`Nouveau courriel sortant → ${dest} (gmail ${r && r.id})`)
@@ -944,7 +957,7 @@ async function handle (req, res, method, p, url) {
 
   // NOUVEAU courriel SORTANT depuis l'Inbox (agent). Gaté (Authentik/proxy).
   if (p === '/conversations/email-new' && method === 'POST') {
-    try { const b = await parseBody(req); const r = await sendNewEmail(b || {}); return json(res, r.ok ? 200 : 400, r) } catch (e) { return json(res, 500, { error: e.message }) }
+    try { const b = await parseBody(req); const r = await sendNewEmail({ ...(b || {}), agentEmail: req.headers['x-authentik-email'] || (b && b.agentEmail) || '' }); return json(res, r.ok ? 200 : 400, r) } catch (e) { return json(res, 500, { error: e.message }) }
   }
 
   // INGESTION COURRIEL (Phase 3) — poussé par n8n (Gmail Trigger sur cc@) ou un poller. Protégé par X-Mail-Token (PAS Authentik).
diff --git a/services/targo-hub/lib/gmail.js b/services/targo-hub/lib/gmail.js
index 2ddd967..cc29548 100644
--- a/services/targo-hub/lib/gmail.js
+++ b/services/targo-hub/lib/gmail.js
@@ -182,4 +182,4 @@ async function handle (req, res, method, p, url) {
 }
 function readBody (req) { return new Promise((resolve) => { let d = ''; req.on('data', c => { d += c; if (d.length > 5e6) req.destroy() }); req.on('end', () => { try { resolve(JSON.parse(d || '{}')) } catch (e) { resolve({}) } }); req.on('error', () => resolve({})) }) }
 
-module.exports = { getToken, listMessages, getMessage, getAttachment, sendMessage, trashMessage, deleteMessage, markSpam, trashThread, poll, start, stop, handle, mailbox }
+module.exports = { getToken, listMessages, getMessage, getAttachment, sendMessage, trashMessage, deleteMessage, markSpam, trashThread, poll, start, stop, handle, mailbox, sendFrom }