fix(cropper): make load failures visible; loud config errors

'Load next queued' did nothing because the running server had been started
without its env file (a restart used '-f .env' from tools/, where no .env
exists), so the cropper was unconfigured and every action answered 503 —
and none of that was visible, because notifications never rendered either:

- notifications used cds-toast/cds-toast-item, which the Carbon bundle does
  not define; a cds-toast-notification element renders nothing standalone in
  this build. The cropper now uses cds-inline-notification in the fixed
  toast viewport (renders, themed, close button) like the wizard
- an unconfigured deployment now says so on the page (503 'Cropper
  unavailable') instead of rendering actions that all fail, and logs a
  startup warning naming the missing credentials
- tests: notifications use a registered element; unconfigured page 503

tools/server.js

@@ -12,7 +12,7 @@ import fs from 'node:fs';
 import { fileURLToPath, pathToFileURL } from 'node:url';
 import { loadYrkaSession, extractPbCookieValue } from './yrka-auth.js';
 import { permittedDomains, stripPhonePrefix, CACHE_FRESH, DOMAIN_TTL_MS, cropPermission } from './permit.js';
-import { createCropperRouter, buildCropperClients } from './cropper.js';
+import { createCropperRouter, buildCropperClients, CROPPER_CREDENTIALS } from './cropper.js';
 
 // ── Hardcoded configuration ──────────────────────────────────────────────────
 export const PORT = 4173;
@@ -471,6 +471,14 @@ export function createApp(overrides = {}) {
     next();
   };
   app.get('/cropper', requirePage, pageCropGate, (req, res, next) => {
+    if (!cropperClients) {
+      return errorPage(
+        res,
+        503,
+        'Cropper unavailable',
+        'The image cropper is not configured on this deployment. Contact your administrator.'
+      );
+    }
     renderPage(
       res,
       'cropper/index.html',
@@ -479,6 +487,12 @@ export function createApp(overrides = {}) {
     );
   });
   const cropperClients = cfg.cropperClients !== undefined ? cfg.cropperClients : buildCropperClients();
+  if (!cropperClients) {
+    const missing = CROPPER_CREDENTIALS.filter((name) => !process.env[name]);
+    console.warn(
+      `[cropper] not configured — missing ${missing.join(', ')}; /cropper will answer 503`
+    );
+  }
   if (cropperClients) {
     app.use(
       '/cropper',