fix(10.1): WR-02 disable plugin stylesheets on screens that are not controller views

The router now drives stylesheet activation after every confirmed
navigation: the list, create and record routes enable their controller's
links, and settings, login, not-found and a controller whose schema has
not arrived yet enable none. Rebuilt the embedded admin dist.

admin/src/app/pluginAssets.ts

@@ -3,8 +3,9 @@
 // {base}/assets/; they load when that controller's view opens, never
 // earlier. Every script loads once per URL as a module script, and a script
 // that fails to load is forgotten, so a later navigation can try again.
-// Stylesheet links belong to one controller: opening another controller
-// disables them, so plugin CSS never styles a view it was not written for.
+// Stylesheet links belong to one controller: the router disables them on
+// every navigation to another controller or to a screen that is not a
+// controller view, so plugin CSS never styles a view it was not written for.
 // Files load only through script and link elements; nothing here fetches.
 import type { ControllerAssets } from '../api/types'
 import { runtime } from './runtime'

admin/src/app/router.ts

@@ -1,4 +1,6 @@
-import { createRouter, createWebHistory, type RouterHistory } from 'vue-router'
+import { createRouter, createWebHistory, type RouteLocationNormalized, type RouterHistory } from 'vue-router'
+import { controllerIdFromParams } from './controllerRoutes'
+import { activateStyles } from './pluginAssets'
 import { runtime } from './runtime'
 import { currentUser } from '../state/useAuth'
 import { homePath } from '../state/useNavigation'
@@ -32,6 +34,23 @@ export function safeRedirect(value: unknown): string | null {
   return value
 }
 
+const CONTROLLER_ROUTES = new Set(['list', 'create', 'record'])
+
+/**
+ * The controller a route shows, or '' for every other screen (settings,
+ * login, not found). Plugin stylesheets follow it (D-16, T-10.1-16).
+ */
+export function routeControllerId(route: RouteLocationNormalized): string {
+  if (typeof route.name !== 'string' || !CONTROLLER_ROUTES.has(route.name)) {
+    return ''
+  }
+  const { vendor, plugin, controller } = route.params
+  if (typeof vendor !== 'string' || typeof plugin !== 'string' || typeof controller !== 'string') {
+    return ''
+  }
+  return controllerIdFromParams({ vendor, plugin, controller })
+}
+
 export function createAdminRouter(history: RouterHistory = createWebHistory(runtime.base)) {
   const router = createRouter({
     history,
@@ -66,5 +85,12 @@ export function createAdminRouter(history: RouterHistory = createWebHistory(runt
     }
     return true
   })
+  // Plugin CSS is global: enable only the links of the controller on screen,
+  // and none on any other screen (D-16, T-10.1-16).
+  router.afterEach((to, _from, failure) => {
+    if (!failure) {
+      activateStyles(routeControllerId(to))
+    }
+  })
   return router
 }