First commit

frontend/app/components/KatexSpan.vue

@@ -0,0 +1,14 @@
+<script setup lang="ts">
+/** Renders a short inline LaTeX snippet with KaTeX. */
+import katex from 'katex'
+
+const props = defineProps<{ tex: string }>()
+
+const html = computed(() =>
+  katex.renderToString(props.tex, { throwOnError: false, displayMode: false })
+)
+</script>
+
+<template>
+  <span v-html="html" />
+</template>