Melissa: hub Configuracoes + Embed + 9 Pages novas + dialog blueprint dark

Sprints 04-29 + 04-30 acumuladas.

- MelissaConfiguracoes: hub 2-col com 6 grupos (Layout/Conta/Agenda/
  Financeiro/WhatsApp/Sistema), tudo embedado via MelissaEmbed.
- MelissaEmbed: wrapper generico que injeta layout-variant=melissa
  e remove cromos pra reaproveitar Pages tradicionais.
- 9 Melissa Pages novas: CadastrosRecebidos, Compromissos, Configuracoes,
  Conversas, Embed, Grupos, Medicos, Recorrencias, Tags.
- Dialog blueprint atualizado: bg-gray-100 (hardcoded light) ->
  bg-[var(--surface-ground)] (tema-aware). 22 dialogs migrados em
  9 arquivos. Anti-pattern documentado.
- PatientsCadastroPage: bug fix dropdown Grupo (optionLabel nome->name),
  toggle vertical/abas com persist localStorage, sticky margin-top.
- Surface picker no popover do MelissaLayout (8 swatches).
- useTopbarPlanMenu, useMelissaWhatsapp, useMelissaPacientesAside novos.
- Migration: status agenda remarcado/confirmado.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/layout/AppRail.vue

@@ -158,7 +158,7 @@ function toggleUserMenu(e) {
                 @click="selectHome"
                 @mouseenter="onHomeHover"
             >
-                <i class="pi pi-fw pi-home" />
+                <i class="pi pi-fw pi-home text-[var(--primary-color)]" />
             </button>
 
             <button
@@ -170,7 +170,7 @@ function toggleUserMenu(e) {
                 @click="selectSection(section)"
                 @mouseenter="onSectionHover(section)"
             >
-                <i :class="section.icon" />
+                <i :class="section.icon" class="text-[var(--primary-color)]" />
             </button>
         </nav>
 
@@ -181,7 +181,7 @@ function toggleUserMenu(e) {
                 aria-label="Configurações"
                 @click="$router.push('/configuracoes')"
             >
-                <i class="pi pi-fw pi-cog" />
+                <i class="pi pi-fw pi-cog text-[var(--primary-color)]" />
             </button>
 
             <!-- Avatar — trigger do menu de usuário -->