perf(ui): remove dead runtime controllers and unused stylesheet families

Two orphaned controllers in the reactive runtime targeted markup nothing
emits any more: hydrateSidebarControllers looked for .wire-sidebar-shell and
friends, which the Sidebar rewrite replaced with BEM classes earlier today,
and hydrateDropdownControllers looked for [data-wrn-dropdown], which no
component or compiler output has ever produced.

ui.css loses the matching legacy sidebar rules, the wire-mega-menu family
left behind when the MegaMenu scaffold was replaced, and a set of
self-contained application-pattern families that nothing references.

Utility layers are deliberately kept even where an individual member is not
name-checked anywhere. wire-bg-primary is documented and tested while
wire-bg-secondary is not, but they are one public family and splitting them
would be incoherent.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

packages/csr/src/reactive-runtime.ts

@@ -3277,93 +3277,12 @@ export const REACTIVE_RUNTIME = String.raw`
     ensureBehaviorObserver();
     hydrateNavbarControllers(host);
     hydratePreferenceControllers(host);
-    hydrateSidebarControllers(host);
-    hydrateDropdownControllers(host);
     hydrateSelectControllers(host);
     hydratePinInputControllers(host);
   }
 
   var navbarOutsideClickBound = false;
   var preferenceOutsideClickBound = false;
-  var dropdownOutsideClickBound = false;
-
-  function hydrateSidebarControllers(root) {
-    var host = root || document;
-    var sidebars = [];
-    if (host.nodeType === 1 && host.matches && host.matches(".wire-sidebar-shell")) {
-      sidebars.push(host);
-    }
-    if (host.querySelectorAll) {
-      Array.prototype.push.apply(sidebars, host.querySelectorAll(".wire-sidebar-shell"));
-    }
-    sidebars.forEach(function (sidebar) {
-      var current = window.location.pathname.replace(/\/+$/, "") || "/";
-      var best = null;
-      var bestLength = -1;
-      sidebar.querySelectorAll(".wire-sidebar-items a[href]").forEach(function (link) {
-        var url;
-        try { url = new URL(link.getAttribute("href"), window.location.origin); } catch (_) { return; }
-        var path = url.pathname.replace(/\/+$/, "") || "/";
-        var matches = path === current || (path !== "/" && current.indexOf(path + "/") === 0);
-        link.classList.remove("is-active");
-        if (!matches || path.length <= bestLength) return;
-        best = link;
-        bestLength = path.length;
-      });
-      sidebar.querySelectorAll(".wire-sidebar-items a[aria-current='page']").forEach(function (link) {
-        if (link !== best) link.removeAttribute("aria-current");
-      });
-      sidebar.querySelectorAll(".wire-sidebar-group.has-active").forEach(function (group) {
-        group.classList.remove("has-active");
-      });
-      if (best) {
-        best.classList.add("is-active");
-        best.setAttribute("aria-current", "page");
-        var group = best.closest(".wire-sidebar-group");
-        if (group) {
-          group.setAttribute("open", "");
-          group.classList.add("has-active");
-        }
-      }
-    });
-  }
-
-  function hydrateDropdownControllers(root) {
-    var host = root || document;
-    var dropdowns = [];
-    if (host.nodeType === 1 && host.matches && host.matches("[data-wrn-dropdown]")) {
-      dropdowns.push(host);
-    }
-    if (host.querySelectorAll) {
-      Array.prototype.push.apply(dropdowns, host.querySelectorAll("[data-wrn-dropdown]"));
-    }
-    dropdowns.forEach(function (dropdown) {
-      if (dropdown.dataset.wrnDropdownBound === "true") return;
-      dropdown.dataset.wrnDropdownBound = "true";
-      dropdown.addEventListener("toggle", function () {
-        if (!dropdown.open) return;
-        document.querySelectorAll("[data-wrn-dropdown][open]").forEach(function (candidate) {
-          if (candidate !== dropdown) candidate.removeAttribute("open");
-        });
-      });
-    });
-    if (!dropdownOutsideClickBound) {
-      dropdownOutsideClickBound = true;
-      document.addEventListener("pointerdown", function (event) {
-        document.querySelectorAll("[data-wrn-dropdown][open]").forEach(function (dropdown) {
-          if (!dropdown.contains(event.target)) dropdown.removeAttribute("open");
-        });
-      });
-      document.addEventListener("keydown", function (event) {
-        if (event.key !== "Escape") return;
-        document.querySelectorAll("[data-wrn-dropdown][open]").forEach(function (dropdown) {
-          dropdown.removeAttribute("open");
-          var summary = dropdown.querySelector(":scope > summary");
-          if (summary) summary.focus();
-        });
-      });
-    }
-  }
 
   function hydratePreferenceControllers(root) {
     var host = root || document;

packages/ui/component-catalog.json

@@ -1,5 +1,7 @@
 {
-  "sourceDocuments": ["Screenshot-directed WRNexus UI catalog reset"],
+  "sourceDocuments": [
+    "Screenshot-directed WRNexus UI catalog reset"
+  ],
   "components": [
     {
       "name": "Accordion",