diff --git a/frontend/pages/applications/[slug].vue b/frontend/pages/applications/[slug].vue
new file mode 100644
index 0000000..c072251
--- /dev/null
+++ b/frontend/pages/applications/[slug].vue
@@ -0,0 +1,345 @@
+<script setup lang="ts">
+const { t } = useI18n()
+const route = useRoute()
+const router = useRouter()
+const slug = route.params.slug as string
+
+const application = ref<Application | null>(null)
+const loading = ref(true)
+const editingApp = ref(false)
+const editForm = ref<ApplicationWrite>({ name: '', slug: '', registryImage: '', description: '', giteaUrl: '' })
+const isSubmitting = ref(false)
+
+// Environment form
+const showEnvForm = ref(false)
+const editingEnvId = ref<number | null>(null)
+const envForm = ref<EnvironmentWrite>({
+    name: '',
+    containerName: '',
+    deployScriptPath: '',
+    maintenanceFilePath: '',
+    appUrl: '',
+    logFiles: [],
+})
+const isSubmittingEnv = ref(false)
+const pendingMaintenanceByEnvId = ref<Record<number, boolean>>({})
+
+async function loadApplication() {
+    loading.value = true
+    try {
+        application.value = await getApplication(slug)
+    } finally {
+        loading.value = false
+    }
+}
+
+// Application edit
+function startEditApp() {
+    if (!application.value) return
+    editForm.value = {
+        name: application.value.name,
+        slug: application.value.slug,
+        registryImage: application.value.registryImage,
+        description: application.value.description ?? '',
+        giteaUrl: application.value.giteaUrl ?? '',
+    }
+    editingApp.value = true
+}
+
+async function saveApp() {
+    isSubmitting.value = true
+    try {
+        application.value = await updateApplication(slug, editForm.value)
+        editingApp.value = false
+        if (editForm.value.slug !== slug) {
+            router.replace(`/applications/${editForm.value.slug}`)
+        }
+    } finally {
+        isSubmitting.value = false
+    }
+}
+
+async function handleDeleteApp() {
+    if (!confirm(t('applications.detail.deleteConfirm'))) return
+    await deleteApplication(slug)
+    router.push('/applications')
+}
+
+// Environment CRUD
+function startCreateEnv() {
+    editingEnvId.value = null
+    envForm.value = { name: '', containerName: '', deployScriptPath: '', maintenanceFilePath: '', appUrl: '', logFiles: [] }
+    showEnvForm.value = true
+}
+
+function startEditEnv(env: Environment) {
+    editingEnvId.value = env.id!
+    envForm.value = {
+        name: env.name,
+        containerName: env.containerName,
+        deployScriptPath: env.deployScriptPath,
+        maintenanceFilePath: env.maintenanceFilePath,
+        appUrl: env.appUrl ?? '',
+        logFiles: env.logFiles.map(lf => ({ label: lf.label, path: lf.path })),
+    }
+    showEnvForm.value = true
+}
+
+async function saveEnv() {
+    isSubmittingEnv.value = true
+    try {
+        if (editingEnvId.value) {
+            await updateEnvironment(editingEnvId.value, envForm.value)
+        } else {
+            await createEnvironment(slug, envForm.value)
+        }
+        showEnvForm.value = false
+        await loadApplication()
+    } finally {
+        isSubmittingEnv.value = false
+    }
+}
+
+async function handleDeleteEnv(envId: number) {
+    if (!confirm(t('environments.deleteConfirm'))) return
+    await deleteEnvironment(envId)
+    await loadApplication()
+}
+
+async function handleToggleMaintenance(env: Environment) {
+    const envId = env.id!
+    pendingMaintenanceByEnvId.value[envId] = true
+    try {
+        await toggleMaintenance(envId, !env.maintenance)
+        await loadApplication()
+    } finally {
+        delete pendingMaintenanceByEnvId.value[envId]
+    }
+}
+
+function addLogFile() {
+    envForm.value.logFiles.push({ label: '', path: '' })
+}
+
+function removeLogFile(index: number) {
+    envForm.value.logFiles.splice(index, 1)
+}
+
+onMounted(loadApplication)
+</script>
+
+<template>
+    <div class="p-6 max-w-5xl mx-auto">
+        <!-- Back link -->
+        <NuxtLink to="/applications" class="text-m-muted hover:text-primary-500 text-sm mb-4 inline-flex items-center gap-1">
+            <Icon name="mdi:arrow-left" size="16" />
+            {{ t('applications.title') }}
+        </NuxtLink>
+
+        <!-- Loading -->
+        <div v-if="loading" class="animate-pulse mt-4">
+            <div class="h-8 bg-m-disabled rounded w-1/3 mb-4" />
+            <div class="h-4 bg-m-disabled rounded w-2/3 mb-2" />
+            <div class="h-4 bg-m-disabled rounded w-1/2" />
+        </div>
+
+        <template v-else-if="application">
+            <!-- Application info -->
+            <div class="bg-m-surface border border-m-border rounded-lg p-6 mt-4">
+                <template v-if="!editingApp">
+                    <div class="flex items-start justify-between">
+                        <div>
+                            <h1 class="text-2xl font-bold text-m-text">{{ application.name }}</h1>
+                            <p v-if="application.description" class="text-m-muted mt-2">{{ application.description }}</p>
+                        </div>
+                        <div class="flex gap-2">
+                            <MalioButton variant="secondary" size="sm" @click="startEditApp">
+                                {{ t('applications.detail.editButton') }}
+                            </MalioButton>
+                            <MalioButton variant="danger" size="sm" @click="handleDeleteApp">
+                                {{ t('applications.detail.deleteButton') }}
+                            </MalioButton>
+                        </div>
+                    </div>
+                    <div class="mt-4 grid grid-cols-1 md:grid-cols-2 gap-4 text-sm">
+                        <div>
+                            <span class="text-m-muted">{{ t('applications.detail.registryImage') }} :</span>
+                            <span class="text-m-text ml-1 font-mono">{{ application.registryImage }}</span>
+                        </div>
+                        <div v-if="application.giteaUrl">
+                            <span class="text-m-muted">{{ t('applications.detail.giteaUrl') }} :</span>
+                            <a :href="application.giteaUrl" target="_blank" class="text-primary-500 hover:underline ml-1">
+                                {{ application.giteaUrl }}
+                            </a>
+                        </div>
+                    </div>
+                </template>
+
+                <!-- Edit form -->
+                <form v-else @submit.prevent="saveApp" class="space-y-4">
+                    <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
+                        <div>
+                            <label class="block text-sm font-medium text-m-text mb-1">{{ t('applications.form.name') }}</label>
+                            <MalioInputText v-model="editForm.name" required />
+                        </div>
+                        <div>
+                            <label class="block text-sm font-medium text-m-text mb-1">{{ t('applications.form.slug') }}</label>
+                            <MalioInputText v-model="editForm.slug" required />
+                        </div>
+                        <div>
+                            <label class="block text-sm font-medium text-m-text mb-1">{{ t('applications.form.registryImage') }}</label>
+                            <MalioInputText v-model="editForm.registryImage" required />
+                        </div>
+                        <div>
+                            <label class="block text-sm font-medium text-m-text mb-1">{{ t('applications.form.giteaUrl') }}</label>
+                            <MalioInputText v-model="editForm.giteaUrl" />
+                        </div>
+                    </div>
+                    <div>
+                        <label class="block text-sm font-medium text-m-text mb-1">{{ t('applications.form.description') }}</label>
+                        <textarea
+                            v-model="editForm.description"
+                            class="w-full rounded border border-m-border bg-m-bg text-m-text p-2"
+                            rows="2"
+                        />
+                    </div>
+                    <div class="flex justify-end gap-2">
+                        <MalioButton variant="secondary" @click="editingApp = false">
+                            {{ t('applications.form.cancel') }}
+                        </MalioButton>
+                        <MalioButton type="submit" :loading="isSubmitting">
+                            {{ t('applications.form.save') }}
+                        </MalioButton>
+                    </div>
+                </form>
+            </div>
+
+            <!-- Environments section -->
+            <div class="mt-8">
+                <div class="flex items-center justify-between mb-4">
+                    <h2 class="text-xl font-bold text-m-text">{{ t('environments.title') }}</h2>
+                    <MalioButton size="sm" @click="startCreateEnv">
+                        {{ t('environments.addButton') }}
+                    </MalioButton>
+                </div>
+
+                <!-- Environment form -->
+                <div v-if="showEnvForm" class="bg-m-surface border border-m-border rounded-lg p-6 mb-4">
+                    <form @submit.prevent="saveEnv" class="space-y-4">
+                        <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
+                            <div>
+                                <label class="block text-sm font-medium text-m-text mb-1">{{ t('environments.form.name') }}</label>
+                                <MalioInputText v-model="envForm.name" required />
+                            </div>
+                            <div>
+                                <label class="block text-sm font-medium text-m-text mb-1">{{ t('environments.form.containerName') }}</label>
+                                <MalioInputText v-model="envForm.containerName" required />
+                            </div>
+                            <div>
+                                <label class="block text-sm font-medium text-m-text mb-1">{{ t('environments.form.deployScriptPath') }}</label>
+                                <MalioInputText v-model="envForm.deployScriptPath" required />
+                            </div>
+                            <div>
+                                <label class="block text-sm font-medium text-m-text mb-1">{{ t('environments.form.maintenanceFilePath') }}</label>
+                                <MalioInputText v-model="envForm.maintenanceFilePath" required />
+                            </div>
+                            <div>
+                                <label class="block text-sm font-medium text-m-text mb-1">{{ t('environments.form.appUrl') }}</label>
+                                <MalioInputText v-model="envForm.appUrl" />
+                            </div>
+                        </div>
+
+                        <!-- Log files -->
+                        <div>
+                            <div class="flex items-center justify-between mb-2">
+                                <label class="text-sm font-medium text-m-text">{{ t('environments.logFiles.title') }}</label>
+                                <button type="button" @click="addLogFile" class="text-primary-500 hover:underline text-sm">
+                                    + {{ t('environments.logFiles.addButton') }}
+                                </button>
+                            </div>
+                            <div v-for="(lf, index) in envForm.logFiles" :key="index" class="flex gap-2 mb-2 items-center">
+                                <MalioInputText v-model="lf.label" :placeholder="t('environments.logFiles.label')" class="flex-1" required />
+                                <MalioInputText v-model="lf.path" :placeholder="t('environments.logFiles.path')" class="flex-[2]" required />
+                                <button type="button" @click="removeLogFile(index)" class="text-m-danger hover:text-red-700 p-1">
+                                    <Icon name="mdi:close" size="18" />
+                                </button>
+                            </div>
+                        </div>
+
+                        <div class="flex justify-end gap-2">
+                            <MalioButton variant="secondary" @click="showEnvForm = false">
+                                {{ t('environments.form.cancel') }}
+                            </MalioButton>
+                            <MalioButton type="submit" :loading="isSubmittingEnv">
+                                {{ t('environments.form.save') }}
+                            </MalioButton>
+                        </div>
+                    </form>
+                </div>
+
+                <!-- Environments list -->
+                <div v-if="!application.environments?.length && !showEnvForm" class="text-center py-8 text-m-muted">
+                    {{ t('applications.card.noEnvironments') }}
+                </div>
+
+                <div v-for="env in application.environments" :key="env.id" class="bg-m-surface border border-m-border rounded-lg p-6 mb-4">
+                    <div class="flex items-start justify-between">
+                        <div>
+                            <div class="flex items-center gap-3">
+                                <h3 class="text-lg font-semibold text-m-text">{{ env.name }}</h3>
+                                <span
+                                    class="px-2 py-0.5 rounded-full text-xs font-medium"
+                                    :class="env.maintenance
+                                        ? 'bg-orange-100 text-orange-700 dark:bg-orange-900 dark:text-orange-300'
+                                        : 'bg-green-100 text-green-700 dark:bg-green-900 dark:text-green-300'"
+                                >
+                                    {{ env.maintenance ? t('environments.maintenance.active') : t('environments.maintenance.inactive') }}
+                                </span>
+                            </div>
+                            <p class="text-m-muted text-sm mt-1 font-mono">{{ env.containerName }}</p>
+                            <a
+                                v-if="env.appUrl"
+                                :href="env.appUrl"
+                                target="_blank"
+                                class="text-primary-500 hover:underline text-sm mt-1 inline-flex items-center gap-1"
+                            >
+                                {{ env.appUrl }}
+                                <Icon name="mdi:open-in-new" size="14" />
+                            </a>
+                        </div>
+                        <div class="flex gap-2">
+                            <MalioButton
+                                size="sm"
+                                :variant="env.maintenance ? 'secondary' : 'danger'"
+                                :loading="!!pendingMaintenanceByEnvId[env.id!]"
+                                @click="handleToggleMaintenance(env)"
+                            >
+                                {{ pendingMaintenanceByEnvId[env.id!]
+                                    ? t('environments.maintenance.pending')
+                                    : env.maintenance
+                                        ? t('environments.maintenance.deactivate')
+                                        : t('environments.maintenance.activate')
+                                }}
+                            </MalioButton>
+                            <MalioButton variant="secondary" size="sm" @click="startEditEnv(env)">
+                                {{ t('environments.editButton') }}
+                            </MalioButton>
+                            <MalioButton variant="danger" size="sm" @click="handleDeleteEnv(env.id!)">
+                                {{ t('environments.deleteButton') }}
+                            </MalioButton>
+                        </div>
+                    </div>
+
+                    <!-- Log files -->
+                    <div v-if="env.logFiles.length" class="mt-4 border-t border-m-border pt-3">
+                        <p class="text-sm font-medium text-m-muted mb-2">{{ t('environments.logFiles.title') }}</p>
+                        <div v-for="lf in env.logFiles" :key="lf.id" class="text-sm text-m-text flex gap-2">
+                            <span class="font-medium">{{ lf.label }} :</span>
+                            <span class="font-mono text-m-muted">{{ lf.path }}</span>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </template>
+    </div>
+</template>