refactor: extract inline scripts to dedupe and sort_filter modules

static/dedupe.ts

@@ -0,0 +1,18 @@
+const dedupe = (): void => {
+  const script = document.currentScript as HTMLScriptElement | null
+  if (!script) return
+  const containerId = script.getAttribute('data-container')
+  const container = containerId ? document.getElementById(containerId) : document
+  if (!container) return
+  const seen = new Set<string>()
+  container.querySelectorAll('[data-id]').forEach((item) => {
+    const id = item.getAttribute('data-id')
+    if (id && seen.has(id)) {
+      item.remove()
+    } else if (id) {
+      seen.add(id)
+    }
+  })
+}
+
+dedupe()