feat(tables): migrate /tables page from Jinja2 to Vue 3 + Vite

Rewrite 237-line vanilla JS + Jinja2 template into Vue 3 SFC components
(App.vue, TableCatalog.vue, DataViewer.vue, useTableData composable).
Establishes apiPost POST request pattern for pure Vite pages. Removes
templates/index.html, updates Vite entry to HTML, and Flask route to
send_from_directory. Includes sql_fragments WHERE_CLAUSE escaping fix,
updated integration tests, and OpenSpec artifact archive.

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

frontend/package.json

@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "vite --host",
-    "build": "vite build && cp ../src/mes_dashboard/static/dist/src/qc-gate/index.html ../src/mes_dashboard/static/dist/qc-gate.html",
+    "build": "vite build && cp ../src/mes_dashboard/static/dist/src/tables/index.html ../src/mes_dashboard/static/dist/tables.html && cp ../src/mes_dashboard/static/dist/src/qc-gate/index.html ../src/mes_dashboard/static/dist/qc-gate.html",
     "test": "node --test tests/*.test.js"
   },
   "devDependencies": {