diff --git a/src/app/components/auth/UserMenu.tsx b/src/app/components/auth/UserMenu.tsx
index 729db98..39836e3 100644
--- a/src/app/components/auth/UserMenu.tsx
+++ b/src/app/components/auth/UserMenu.tsx
@@ -136,7 +136,7 @@ export function UserMenu({ syncStatus, variant = 'card', extraActions, secondary
   // Se déconnecter. Langage couleur : liens = neutre→emerald au survol,
   // Se déconnecter = rouge (cohérent avec l'existant).
   const itemClass =
-    'flex items-center w-full justify-start gap-2.5 px-4 py-3 text-sm text-[var(--github-text-primary)] font-mono hover:bg-emerald-500/10 hover:text-emerald-300 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-emerald-500/60 focus-visible:ring-inset';
+    'flex items-center w-full justify-start min-h-11 gap-2.5 px-4 py-3 text-sm text-[var(--github-text-primary)] font-mono hover:bg-emerald-500/10 hover:text-emerald-300 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-emerald-500/60 focus-visible:ring-inset';
 
   const menuItems = (
     <div className="py-1" role="none">
diff --git a/src/app/components/support/SupportTicketModal.tsx b/src/app/components/support/SupportTicketModal.tsx
index 60426e1..109b8f9 100644
--- a/src/app/components/support/SupportTicketModal.tsx
+++ b/src/app/components/support/SupportTicketModal.tsx
@@ -210,6 +210,9 @@ export function SupportTicketModal({ userId, onClose }: SupportTicketModalProps)
               >
                 Description
               </label>
+              {/* text-base (16px) on mobile prevents iOS Safari focus auto-zoom (any
+                  input < 16px triggers it), the cause of the THI-342 viewport overflow
+                  after focus. md:text-sm restores 14px on desktop (MessageInput pattern). */}
               <textarea
                 id={descId}
                 value={description}
@@ -219,7 +222,7 @@ export function SupportTicketModal({ userId, onClose }: SupportTicketModalProps)
                 required
                 aria-describedby={descHintId}
                 placeholder="Que s'est-il passé ? Ce que tu faisais, ce qui n'a pas marché, et ce que tu attendais. Plus c'est précis, plus on peut aider vite."
-                className="w-full rounded-lg border border-[var(--github-border-primary)] bg-[var(--github-bg-secondary)] px-3 py-2 text-sm text-[var(--github-text-primary)] placeholder:text-[var(--github-text-secondary)] outline-none focus-visible:ring-2 focus-visible:ring-emerald-500/60"
+                className="w-full rounded-lg border border-[var(--github-border-primary)] bg-[var(--github-bg-secondary)] px-3 py-2 text-base md:text-sm text-[var(--github-text-primary)] placeholder:text-[var(--github-text-secondary)] outline-none focus-visible:ring-2 focus-visible:ring-emerald-500/60"
               />
               <p id={descHintId} className="mt-1 text-xs text-[var(--github-text-secondary)]">
                 {trimmedLength < DESCRIPTION_MIN