Fix Outlook email copy formatting

web/src/components/admin/AdminEmail.jsx

@@ -1,5 +1,6 @@
 import { useEffect, useRef, useState } from 'react';
 import { api } from '../../lib/api.js';
+import { copyRichEmail } from '../../lib/emailClipboard.js';
 
 const INITIAL = {
   subject: 'Actualités du Business Club SLUC Nancy',
@@ -11,27 +12,6 @@ const INITIAL = {
   signature: "À très bientôt,\nL'équipe du Business Club SLUC Nancy",
 };
 
-function bodyFragment(html) {
-  return new DOMParser().parseFromString(html, 'text/html').body.innerHTML.trim();
-}
-
-function legacyCopy(html) {
-  const holder = document.createElement('div');
-  holder.contentEditable = 'true';
-  holder.style.cssText = 'position:fixed;left:-10000px;top:0;width:700px;opacity:0;pointer-events:none;';
-  holder.innerHTML = html;
-  document.body.appendChild(holder);
-  const range = document.createRange();
-  range.selectNodeContents(holder);
-  const selection = window.getSelection();
-  selection.removeAllRanges();
-  selection.addRange(range);
-  const copied = document.execCommand('copy');
-  selection.removeAllRanges();
-  holder.remove();
-  if (!copied) throw new Error('Rich copy failed');
-}
-
 export function EmailCreatorTab() {
   const [form, setForm] = useState(INITIAL);
   const [data, setData] = useState(null);
@@ -69,17 +49,7 @@ export function EmailCreatorTab() {
 
   const copyEmail = async () => {
     try {
-      const fragment = bodyFragment(data.html);
-      if (navigator.clipboard?.write && window.ClipboardItem) {
-        await navigator.clipboard.write([
-          new window.ClipboardItem({
-            'text/html': new Blob([fragment], { type: 'text/html' }),
-            'text/plain': new Blob([`${form.subject}\n\n${form.body}`], { type: 'text/plain' }),
-          }),
-        ]);
-      } else {
-        legacyCopy(fragment);
-      }
+      await copyRichEmail(data.html, `${form.subject}\n\n${form.body}`);
       flash('email');
     } catch {
       setError('La copie enrichie a échoué dans ce navigateur. Utilisez le téléchargement HTML.');

web/src/components/admin/AdminTabs.jsx

@@ -1,5 +1,6 @@
 import { useEffect, useRef, useState } from 'react';
 import { api, dateParts, seasonLabel, statutLabel } from '../../lib/api.js';
+import { copyRichEmail } from '../../lib/emailClipboard.js';
 import { useAuth } from '../../lib/AuthContext.jsx';
 import Modal from '../Modal.jsx';
 import ImageSlot from '../ImageSlot.jsx';
@@ -319,34 +320,6 @@ function escHtml(v) {
   return String(v ?? '').replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
 }
 
-// Clipboard HTML must be a fragment, not a second complete document. Outlook
-// otherwise rebuilds the pasted <body> and drops part of the outer layout.
-function emailBodyFragment(html) {
-  const doc = new DOMParser().parseFromString(html, 'text/html');
-  return doc.body.innerHTML.trim();
-}
-
-// Older browsers do not expose ClipboardItem. A real rich-text selection is
-// still preferable to copying the HTML source as plain text.
-function legacyCopyRichHtml(html) {
-  const holder = document.createElement('div');
-  holder.setAttribute('contenteditable', 'true');
-  holder.setAttribute('aria-hidden', 'true');
-  holder.style.cssText = 'position:fixed;left:-10000px;top:0;width:700px;opacity:0;pointer-events:none;';
-  holder.innerHTML = html;
-  document.body.appendChild(holder);
-
-  const selection = window.getSelection();
-  const range = document.createRange();
-  range.selectNodeContents(holder);
-  selection.removeAllRanges();
-  selection.addRange(range);
-  const copied = document.execCommand('copy');
-  selection.removeAllRanges();
-  holder.remove();
-  if (!copied) throw new Error('Rich HTML copy failed');
-}
-
 // Composer + preview of the ready-to-send HTML invitation email generated
 // server-side for one rencontre. Every text zone (salutation, intro,
 // conclusion, signature) is editable — the preview regenerates as the
@@ -402,17 +375,7 @@ function EmailModal({ renc, onClose }) {
   const copyEmail = async () => {
     setError('');
     try {
-      const fragment = emailBodyFragment(data.html);
-      if (navigator.clipboard?.write && window.ClipboardItem) {
-        await navigator.clipboard.write([
-          new window.ClipboardItem({
-            'text/html': new Blob([fragment], { type: 'text/html' }),
-            'text/plain': new Blob([`${data.subject}\n${data.inscriptionUrl}`], { type: 'text/plain' }),
-          }),
-        ]);
-      } else {
-        legacyCopyRichHtml(fragment);
-      }
+      await copyRichEmail(data.html, `${data.subject}\n${data.inscriptionUrl}`);
       flash('email');
     } catch {
       setError('Copie impossible dans ce navigateur — utilisez le téléchargement.');

web/src/lib/emailClipboard.js

@@ -0,0 +1,61 @@
+function emailBodyFragment(html) {
+  const doc = new DOMParser().parseFromString(html, 'text/html');
+  return doc.body.innerHTML.trim();
+}
+
+function copyRenderedSelection(html) {
+  const holder = document.createElement('div');
+  holder.setAttribute('contenteditable', 'true');
+  holder.setAttribute('aria-hidden', 'true');
+  holder.style.cssText = [
+    'position:fixed',
+    'left:-10000px',
+    'top:0',
+    'width:700px',
+    'background:#F2EEE8',
+    'pointer-events:none',
+    'z-index:-1',
+  ].join(';');
+  holder.innerHTML = html;
+  document.body.appendChild(holder);
+
+  const selection = window.getSelection();
+  const range = document.createRange();
+
+  try {
+    holder.focus();
+    range.selectNodeContents(holder);
+    selection.removeAllRanges();
+    selection.addRange(range);
+
+    if (!document.execCommand('copy')) {
+      throw new Error("La copie de l'e-mail a échoué.");
+    }
+  } finally {
+    selection.removeAllRanges();
+    holder.remove();
+  }
+}
+
+export async function copyRichEmail(html, plainText = '') {
+  const fragment = emailBodyFragment(html);
+
+  try {
+    // Outlook conserve beaucoup mieux la mise en forme lorsque le presse-papiers
+    // provient d'une sélection réellement rendue par le navigateur.
+    copyRenderedSelection(fragment);
+    return;
+  } catch (selectionError) {
+    if (!navigator.clipboard?.write || !window.ClipboardItem) {
+      throw selectionError;
+    }
+  }
+
+  // Repli pour les navigateurs qui refusent execCommand('copy').
+  await navigator.clipboard.write([
+    new window.ClipboardItem({
+      'text/html': new Blob([fragment], { type: 'text/html' }),
+      'text/plain': new Blob([plainText], { type: 'text/plain' }),
+    }),
+  ]);
+}