fix: layout buttons reflect state + apply to all matching elements

feat: unified Figma-style Auto Layout panel

feat: Figma-style sizing controls — Hug/Fill/Fixed modes

feat: project style guide detection + improved visual controls

fix: viewport toggle re-selects element + read-only sizing

fix: font picker portal + unit detection + viewport toggle + tree prompt

fix: null checks in app.js + unit selector + scroll + overflow

refactor: panel React standalone — FontPicker, OpacitySlider, SpacingDiagram, Stepper

fix: spacing diagram + Google Fonts + dark/light mode

refactor: UI completa desde cero — sistema de diseno solido, mobile-first, accesible

feat: font family picker visual + fontFamily in bridge

fix: mobile scroll-to-selected + drum roll controls

fix: mobile panel desde abajo + solo aparece al seleccionar

fix: live update inputs + spacing visual editor + mobile touch

feat: mobile 50/50 + inputs editables + API key fix + modal send