- BaseModal.vue (new): the backdrop + dialog-panel shell (dimmed fixed overlay, bordered rounded panel, role=dialog, close on Escape + backdrop mousedown). Caller sizes/pads/shadows the panel via `panelClass`, picks start/center `align`, and sets an `ariaLabel` for header-less panels. - LabelsModal, CommandPalette, and the AppShell keyboard-shortcuts overlay drop their hand-rolled backdrop+panel shells and slot their content into BaseModal (~12 lines of overlay boilerplate each → gone). - NoteEditor deliberately keeps its own shell: its backdrop mousedown is drag-guarded and its Esc/⌘-Enter handling is bespoke (unsaved-edit safety), so folding it in would risk regressing the app's core editing surface (rule 28). - AccountView's one device-name field now uses the shared BaseInput. SettingsView is intentionally NOT converted — its rows are a horizontal label+control pattern (checkbox/number/text, direct value mutation), a different shape than BaseInput's vertical form field. Frontend-only; CI vue-tsc is the type/template gate (no local typecheck, rule 10). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FRgehjoz7Yv8LkUfADxACm