Add cookie note so we don't break the law

src/sass/index.scss

@@ -95,6 +95,14 @@ legend {
     margin-bottom: 8px;
 }
 
+.cookie-note {
+    border-top: 1px solid var(--border_grey);
+    border-bottom: 1px solid var(--border_grey);
+    padding: 6px 0 8px 0;
+    margin-bottom: 8px;
+    margin-top: 16px;
+}
+
 ul {
     padding-left: 1.3em;
 }

src/views/preferences.nim

@@ -39,6 +39,9 @@ proc renderPreferences*(prefs: Prefs; path: string; themes: seq[string]): VNode
 
         renderPrefs()
 
+        h4(class="cookie-note"):
+          text "Preferences are stored client-side using cookies without any personal information."
+
         button(`type`="submit", class="pref-submit"):
           text "Save preferences"