chore: checkpoint initial — Zektyc dataset, avant humanisation

- site vitrine + fingerprint test + zmap + z-panel
- remplacement duckdns -> riricdev.tail5ea5cd.ts.net (canonical/og/alternates/docs)
- suppression du token DuckDNS (plus utilisé)

public/js/theme.js

@@ -0,0 +1,29 @@
+(function () {
+  var STORAGE_KEY = "zektyc-theme"
+  var DEFAULT = "dark"
+
+  function getPreferred() {
+    try {
+      var stored = localStorage.getItem(STORAGE_KEY)
+      if (stored === "light" || stored === "dark") return stored
+    } catch (e) {}
+    return DEFAULT
+  }
+
+  function apply(theme) {
+    document.documentElement.setAttribute("data-theme", theme)
+  }
+
+  apply(getPreferred())
+
+  document.addEventListener("click", function (e) {
+    var btn = e.target.closest ? e.target.closest(".theme-btn") : null
+    if (!btn) return
+    var current = document.documentElement.getAttribute("data-theme") || DEFAULT
+    var next = current === "dark" ? "light" : "dark"
+    apply(next)
+    try {
+      localStorage.setItem(STORAGE_KEY, next)
+    } catch (e) {}
+  })
+})();