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Native confirm() dialogs block browser automation entirely (discovered via a frozen tab while browser-testing the app.messages/app.modal adoption), and native alert()/confirm() are visually inconsistent with the rest of the UI. Replaced every call site with app.messages.action/confirm/toast: - directory.ejs: rotateSecret/deleteResource confirms and all inline save/add/remove-group/edge error alerts now target #resourceModal's actionMessage (or, for deleteResource — called from the outer table row, not the modal — the page's own card). - impersonate_modal.ejs, onboarding.ejs: no local .actionMessage target exists on these pages, so their alerts became page-wide toasts. - executive.ejs: two alerts in sendNotification's validation now use the existing $compose target; saveTos's alert now reuses the function's own msgEl inline-message element instead of introducing a second mechanism. - users.ejs, profile.ejs, proxy's profile.ejs: toggleActive's alert (no row context available at the call site) became a toast; revokeInvite/revokeToken/rotateToken use the row/card element already in scope. - app.js: removed app.user.remove and app.oauthClient.remove, which contained native confirm() guards and had zero callers anywhere in the app — dead code, deleted rather than converted. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>