feat: rebuild web UI on the shared theta42 app stack; OIDC + local admin auth

The web management UI was a bespoke minimal theme with LDAP-bind login.
Rebuild it to match the SSO Manager and Proxy — same stack, same look/feel,
same auth model. The SSH bridge, audit, metrics, and access logic are
unchanged; this is purely the web layer.

Frontend (mirrors proxy/sso):
- Express + EJS with the shared top.ejs/bottom.ejs shell, Bootstrap 5,
  jQuery, jq-repeat, FontAwesome, Socket.IO, and the shared app-base.js /
  val.js client framework (copied verbatim). Vendor libs served from
  node_modules via /static-modules; app assets via /static.
- Dashboard / Sessions / Audit pages render in the common look/feel,
  loading data through the authenticated /api/* endpoints.

Auth (mirrors proxy):
- OIDC against the SSO (utils/oidc.js + routes/auth.js + models/oidc_state)
  plus a local anti-lockout admin (models/user_redis.js, bootstrapped from
  auth.adminUsers[0] / auth.localAdminPass). AuthToken sessions carry the
  group snapshot; middleware gates the data API on adminGroups or the local
  admin. New config: oidc{} + auth.adminUsers/localAdminPass.
- /api/user/me drives the client login state; "Log in with SSO" hidden when
  oidc.enabled is false.

Verified end to end: local admin login -> token -> /api/user/me isAdmin,
metrics/sessions/audit 200 with token / 401 without / 401 bad password;
static + page shells serve; 26 tests green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

secrets.js.example

@@ -59,8 +59,33 @@ module.exports = {
 
 	web: { port: 3002 },
 
-	// LDAP groups whose members may use the web UI/API.
-	auth: { adminGroups: ['app_sso_admin'] },
+	// Web UI/API login. Same model as the proxy: OIDC against the SSO for
+	// normal users, plus a local anti-lockout admin. Set enabled:true and fill
+	// in the endpoints + client creds to turn on "Log in with SSO" (in the
+	// theta-env bundle these are provisioned for you).
+	oidc: {
+		enabled: false,
+		issuer: 'https://sso.example.com',
+		authorizationEndpoint: 'https://sso.example.com/oauth/authorize',
+		tokenEndpoint: 'http://sso-manager:3001/oauth/token',
+		userinfoEndpoint: 'http://sso-manager:3001/oauth/userinfo',
+		clientId: 'CHANGE_ME',
+		clientSecret: 'CHANGE_ME',
+		redirectUri: 'https://jump.example.com/api/auth/oidc/callback',
+		scopes: ['openid', 'profile', 'email', 'groups'],
+		groupsClaim: 'groups',
+		usernameClaim: 'preferred_username',
+	},
+
+	auth: {
+		// OIDC group memberships that grant web UI/API admin access.
+		adminGroups: ['app_sso_admin'],
+		// Local anti-lockout admin — the first name is bootstrapped as a
+		// redis-backed user on first boot (password from localAdminPass below,
+		// or a random one printed to the log once). Works even if OIDC is down.
+		adminUsers: ['jumpadmin'],
+		localAdminPass: 'CHANGE_ME',
+	},
 
 	redis: {
 		prefix: 'jump_host_',