Standardize page width, card layouts; mark SSO users external and read-only

- All pages now wrap their content in <div class="container mt-4">,
  matching sso-manager-node's width instead of rendering full-bleed inside
  the fluid shell.
- Users and Permissions pages converted from bare <table>s to the same
  card-grid convention already used on the Groups page.
- Users backed by SSO/OIDC login (backing === 'oidc', set by the redis
  user model's JIT-provisioning path) are now marked "External (SSO)" and
  their password-change control is hidden; PUT /password/:username also
  rejects with 403 server-side for such users. Deletion stays allowed.
  Redis-backend only -- LDAP/PAM deployments have no per-record marker for
  this today.
- app-base.js (byte-identical across the 3 apps): added
  app.util.revealItem(), wired into the Users/Permissions create flows.
- Bumped @simpleworkjs/frontend to ^0.2.7.

nodejs/package-lock.json

@@ -1,19 +1,19 @@
 {
   "name": "proxy-api",
-  "version": "1.5.3",
+  "version": "1.7.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "proxy-api",
-      "version": "1.5.3",
+      "version": "1.7.0",
       "license": "MIT",
       "dependencies": {
         "@fortawesome/fontawesome-free": "^7.3.0",
         "@popperjs/core": "^2.11.8",
         "@simpleworkjs/app-stack": "^1.0.0",
         "@simpleworkjs/conf": "^1.2.0",
-        "@simpleworkjs/frontend": "^0.2.6",
+        "@simpleworkjs/frontend": "^0.2.7",
         "@simpleworkjs/ldap": "^1.0.0",
         "@simpleworkjs/oidc-client": "^1.0.0",
         "acme-client": "^5.4.0",
@@ -310,9 +310,9 @@
       }
     },
     "node_modules/@simpleworkjs/frontend": {
-      "version": "0.2.6",
-      "resolved": "https://registry.npmjs.org/@simpleworkjs/frontend/-/frontend-0.2.6.tgz",
-      "integrity": "sha512-2uqvEjxyZ2LE+sfhP6rJcEMmqdViazJ3ZkitWJXInPMWF6DiEZuP5MYqBqJvfDko63CCHEt1/ChFQd7Ry85Pzg==",
+      "version": "0.2.7",
+      "resolved": "https://registry.npmjs.org/@simpleworkjs/frontend/-/frontend-0.2.7.tgz",
+      "integrity": "sha512-s5oBc9dKLjd1bVhOQWR6+97faqQsbVKi0QYn5sNqOP6pGkUYUg2mY88ruHHg4Fp710owrzO/F3of/7tteFiGCw==",
       "license": "MIT",
       "engines": {
         "node": ">=18.0.0"