Commit iniziale di eminuxCRM: CRM Rails con pipeline, campagne email e Docker.

Include autenticazione, progetti isolati, mail marketing HTML con SMTP, test A/B e editor WYSIWYG.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/javascript/controllers/theme_controller.js

@@ -0,0 +1,14 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  toggle() {
+    const next = document.documentElement.classList.contains("dark") ? "light" : "dark"
+    this.apply(next)
+  }
+
+  apply(theme) {
+    document.documentElement.classList.toggle("dark", theme === "dark")
+    try { localStorage.setItem("theme", theme) } catch (_) { /* ignore */ }
+    document.cookie = `theme=${theme}; path=/; max-age=31536000; SameSite=Lax`
+  }
+}