Refactor CV into separate role-specific components and misc frontend tweaks

Split CV.vue into CVGeneral, CVBackend, CVFrontend, and CVHospitality variants.
Also adds halftone body class, reformats index.html, and minor style/layout fixes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

vue/src/views/Notes.vue

@@ -60,7 +60,7 @@ onMounted(fetchFile);
 
 <template>
     <main class="items-center flex flex-col">
-        <div class="background halftone" />
+        <div class="background" />
         <div
             v-if="file"
             class="a4page-portrait border-primary-1 flex flex-col relative overflow-scroll gap-1 bg-bg_primary"