feat : init Central project — Symfony 8 + Nuxt 4 + Docker starter

Same architecture as Lesstime: API Platform 4, JWT auth, @malio/layer-ui,
PostgreSQL 16, Docker Compose (ports 8083/3003/5436), dark mode theme.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/pages/index.vue

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+<template>
+    <div>
+        <h1 class="text-2xl font-bold text-neutral-900">Tableau de bord</h1>
+        <p class="mt-4 text-neutral-600">Bienvenue sur Central.</p>
+    </div>
+</template>
+
+<script setup lang="ts">
+useHead({
+    title: 'Tableau de bord'
+})
+</script>

frontend/pages/login.vue

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+<template>
+    <div class="mx-auto w-full max-w-lg">
+    <span
+        class="flex items-center justify-center bg-white text-xl font-bold uppercase text-primary-500 p-4"
+    >
+        <img src="/malio.png" alt="Logo" class="w-[150px]"/>
+    </span>
+        <form
+            class="mt-8 space-y-6 rounded-lg border border-neutral-200 bg-white p-6 shadow-sm"
+            @submit.prevent="handleSubmit"
+        >
+            <MalioInputText
+                label="Nom d'utilisateur"
+                autocomplete="username"
+                group-class="mt-0"
+                inputClass="w-full"
+                v-model="username"
+            />
+
+            <div>
+                <label class="text-sm font-semibold text-neutral-700" for="password">
+                    Mot de passe
+                </label>
+                <input
+                    id="password"
+                    v-model="password"
+                    type="password"
+                    autocomplete="current-password"
+                    class="mt-2 w-full rounded-md border border-neutral-300 bg-white px-3 py-2 text-base text-neutral-900 focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-secondary-500/20"
+                />
+            </div>
+
+            <MalioButton
+                label="Se connecter"
+                button-class="w-full"
+                type="submit"
+                :disabled="isSubmitting"
+            />
+            <p class="font-bold">v{{ version }}</p>
+        </form>
+    </div>
+</template>
+
+<script setup lang="ts">
+definePageMeta({layout: 'auth'})
+useHead({
+    title: 'Connexion'
+})
+
+const auth = useAuthStore()
+const {version} = useAppVersion()
+
+const username = ref('')
+const password = ref('')
+const isSubmitting = ref(false)
+
+async function handleSubmit() {
+    if (isSubmitting.value) return
+
+    isSubmitting.value = true
+    try {
+        await auth.login(username.value, password.value)
+        await navigateTo('/')
+    } finally {
+        isSubmitting.value = false
+    }
+}
+</script>