feat(ui): mobile bottom nav com 4 fixos + menu MAIS para rotas secundárias

- HOME, TX, IMPORT, PERS. fixos na barra inferior
- Botão '···' abre overlay com CONTAS, REC., CAT., CFG
- Overlay fecha ao navegar ou ao tocar fora
- Transição de fade no overlay

apps/web/src/components/BottomNav.vue

@@ -1,10 +1,42 @@
+<script setup lang="ts">
+import { ref } from 'vue'
+import { useRouter } from 'vue-router'
+
+const showMore = ref(false)
+const router = useRouter()
+
+router.afterEach(() => { showMore.value = false })
+
+const moreItems = [
+  { to: '/contas',        label: 'CONTAS' },
+  { to: '/recorrencias',  label: 'REC.'   },
+  { to: '/categorias',    label: 'CAT.'   },
+  { to: '/configuracoes', label: 'CFG'    },
+]
+</script>
+
 <template>
+  <Transition name="fc-more">
+    <div v-if="showMore" class="fc-more-overlay" @click.self="showMore = false">
+      <nav class="fc-more-menu">
+        <RouterLink
+          v-for="item in moreItems"
+          :key="item.to"
+          :to="item.to"
+          class="fc-more-menu__item fc-pixel"
+        >{{ item.label }}</RouterLink>
+      </nav>
+    </div>
+  </Transition>
+
   <nav class="fc-bottom-nav">
     <RouterLink to="/"           class="fc-bottom-nav__item fc-pixel">HOME</RouterLink>
     <RouterLink to="/transacoes" class="fc-bottom-nav__item fc-pixel">TX</RouterLink>
-    <RouterLink to="/importar"   class="fc-bottom-nav__item fc-pixel add">+</RouterLink>
+    <RouterLink to="/importar"   class="fc-bottom-nav__item fc-pixel">IMPORT</RouterLink>
     <RouterLink to="/personagem" class="fc-bottom-nav__item fc-pixel">PERS.</RouterLink>
-    <RouterLink to="/contas"     class="fc-bottom-nav__item fc-pixel">¤</RouterLink>
+    <button class="fc-bottom-nav__item fc-bottom-nav__more fc-pixel" @click="showMore = !showMore">
+      {{ showMore ? '✕' : '···' }}
+    </button>
   </nav>
 </template>
 
@@ -25,11 +57,45 @@
   transition: color .12s;
 }
 .fc-bottom-nav__item.router-link-active { color: var(--fc-accent-2); }
-.fc-bottom-nav__item.add {
-  font-size: 18px; color: var(--fc-accent);
-  text-shadow: 0 0 8px var(--fc-accent);
+.fc-bottom-nav__more {
+  background: none; border: none; cursor: pointer;
+  font-size: 14px; letter-spacing: 1px;
 }
+.fc-bottom-nav__more.active { color: var(--fc-accent); }
+
+/* overlay */
+.fc-more-overlay {
+  display: none;
+  position: fixed; inset: 0; bottom: 56px;
+  z-index: 99;
+  background: rgba(0,0,0,.5);
+  align-items: flex-end;
+}
+.fc-more-menu {
+  width: 100%;
+  background: var(--fc-bg-panel);
+  border-top: 2px solid var(--fc-panel-edge);
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+}
+.fc-more-menu__item {
+  display: flex; align-items: center; justify-content: center;
+  padding: 16px 4px;
+  font-size: 7px; color: var(--fc-text-dim);
+  text-decoration: none;
+  border-right: 1px solid var(--fc-panel-edge);
+  transition: color .12s, background .12s;
+}
+.fc-more-menu__item:last-child { border-right: none; }
+.fc-more-menu__item.router-link-active,
+.fc-more-menu__item:active { color: var(--fc-accent-2); background: rgba(0,240,255,.05); }
+
+/* transitions */
+.fc-more-enter-active, .fc-more-leave-active { transition: opacity .15s; }
+.fc-more-enter-from, .fc-more-leave-to { opacity: 0; }
+
 @media (max-width: 767px) {
   .fc-bottom-nav { display: flex; }
+  .fc-more-overlay { display: flex; }
 }
 </style>