move docs back repo

docs-site/.vitepress/theme/components/BlinkingCursor.vue

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+<template>
+  <span class="tui-cursor" aria-hidden="true">█</span>
+</template>

docs-site/.vitepress/theme/components/StatusLine.vue

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+<script setup>
+import { useRoute, useData } from 'vitepress';
+import { computed } from 'vue';
+
+const route = useRoute();
+const { page, frontmatter } = useData();
+
+const mode = computed(() => {
+  const layout = frontmatter.value.layout;
+  if (layout === 'home') return 'HOME';
+  return 'NORMAL';
+});
+
+const filePath = computed(() => {
+  const path = route.path;
+  return path === '/' ? 'index.md' : `${path.replace(/^\//, '')}.md`;
+});
+
+const section = computed(() => {
+  const path = route.path;
+  if (path === '/') return 'root';
+  const parts = path.split('/').filter(Boolean);
+  return parts[0] || 'root';
+});
+
+const lastUpdated = computed(() => {
+  if (!page.value.lastUpdated) return '';
+  const date = new Date(page.value.lastUpdated);
+  return date.toISOString().slice(0, 10);
+});
+</script>
+
+<template>
+  <footer class="tui-statusline" aria-label="Page info">
+    <div class="tui-statusline__left">
+      <span class="tui-statusline__mode" :data-mode="mode">{{ mode }}</span>
+      <span class="tui-statusline__sep"></span>
+      <span class="tui-statusline__file">{{ filePath }}</span>
+    </div>
+    <div class="tui-statusline__right">
+      <span class="tui-statusline__section">{{ section }}</span>
+      <span class="tui-statusline__sep"></span>
+      <span v-if="lastUpdated" class="tui-statusline__date">{{ lastUpdated }}</span>
+      <span v-if="lastUpdated" class="tui-statusline__sep"></span>
+      <span class="tui-statusline__branch">GPL-3.0</span>
+    </div>
+  </footer>
+</template>