Add preview handling

components/PreviewBanner.vue

@@ -0,0 +1,106 @@
+<template>
+    <div v-if="isPreview" class="preview-banner theme-dark">
+        <div class="preview-banner__content">
+            <div class="preview-banner__info">
+                <span class="preview-banner__label">Preview Mode</span>
+                <span class="preview-banner__status">{{ status }}</span>
+            </div>
+            <a
+                :href="exitPreviewUrl"
+                class="preview-banner__exit"
+                @click="exitPreview"
+            >
+                Exit Preview
+            </a>
+        </div>
+    </div>
+</template>
+
+<script setup>
+import { computed } from 'vue'
+
+const props = defineProps({
+    isPreview: {
+        type: Boolean,
+        default: false,
+    },
+    status: {
+        type: String,
+        default: 'published',
+    },
+})
+
+const exitPreviewUrl = computed(() => {
+    if (typeof window === 'undefined') return '/'
+
+    const url = new URL(window.location.href)
+    url.searchParams.delete('preview')
+    url.searchParams.delete('status')
+    url.searchParams.delete('documentId')
+    url.searchParams.delete('uid')
+    return url.toString()
+})
+
+const exitPreview = (event) => {
+    // For better UX, we can use client-side navigation instead of full page reload
+    event.preventDefault()
+    if (typeof window !== 'undefined') {
+        window.location.href = exitPreviewUrl.value
+    }
+}
+</script>
+
+<style lang="scss" scoped>
+.preview-banner {
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    background: var(--theme-accent);
+    color: var(--theme-bg);
+    z-index: 9999;
+    padding: 8px 16px;
+
+    &__content {
+        display: flex;
+        align-items: center;
+        justify-content: space-between;
+        max-width: 1200px;
+        margin: 0 auto;
+        font-size: 14px;
+        font-weight: 500;
+    }
+
+    &__info {
+        display: flex;
+        align-items: center;
+        gap: 12px;
+    }
+
+    &__label {
+        font-weight: 600;
+    }
+
+    &__status {
+        background: rgba(255, 255, 255, 0.2);
+        padding: 2px 8px;
+        border-radius: 12px;
+        font-size: 12px;
+        text-transform: capitalize;
+    }
+
+    &__exit {
+        color: var(--theme-bg);
+        text-decoration: none;
+        padding: 4px 12px;
+        border: 1px solid rgba(255, 255, 255, 0.3);
+        border-radius: 4px;
+        transition: all 0.2s ease;
+
+        &:hover {
+            background: rgba(255, 255, 255, 0.15);
+            border-color: rgba(255, 255, 255, 0.5);
+        }
+    }
+}
+</style>