v3: button styling consistency pass

src/pages/UserPublicProfile.tsx

@@ -488,14 +488,14 @@ export function UserPublicProfile() {
         actions={
           <>
             <button
-              className="logout-btn"
+              className="btn-border"
               type="button"
               onClick={() => navigate("/")}
             >
               ← Back
             </button>
             {me && (
-              <button className="logout-btn" type="button" onClick={logout}>
+              <button className="btn-border" type="button" onClick={logout}>
                 Log out
               </button>
             )}
@@ -563,7 +563,7 @@ export function UserPublicProfile() {
           {isOwnProfile && (
             <div className="profile-own-actions">
               <InviteButton />
-              <button type="button" className="logout-btn" onClick={logout}>
+              <button type="button" className="btn-border" onClick={logout}>
                 Log out
               </button>
             </div>