Add self-service API tokens (PATs) with UI + Bearer auth (#119)

Personal access tokens so scripts/CI can call the management API without an
OIDC browser session. Each logged-in user mints their own token; it
authenticates as the creator (groups snapshotted at mint, mirroring the proxy's
browser AuthToken), and the existing authz layer (Permission.effectiveFor /
roles.resolveEffective) applies unchanged. Local groups and owned-domain rights
are recomputed live; only SSO/LDAP group membership is the mint-time snapshot.

- models/api_token.js: new ApiToken model (prx_<id>_<secret> format; id is the
  lookup key, secret bcrypt-hashed + isPrivate, shown once). add()/rotate()/
  authenticate(); optional expires_at; best-effort last_used_on; groups
  snapshot. No _ttl (persists). Deliberately NOT wrapped in ModelPs (so the
  last_used_on write on the auth path doesn't spam the socket).
- routes/api_token.js: self-service CRUD (list/get/update/delete/rotate),
  owner-scoped (created_by === reqUsername(req), 403 otherwise).
- middleware/auth.js + models/auth.js: accept `Authorization: Bearer prx_...`
  (precedence over the auth-token session header). Builds a synthetic req.token
  that satisfies the only three req.token reads (auth.js .user/.groupsArray,
  authz.js reqUsername .created_by) so the authz layer works unchanged.
  checkApiToken collapses every failure to one generic 401 (no leak).
- views/api_tokens.ejs + routes/render.js (GET /api-tokens): self-service page
  (forceLogin, no admin gate) — create (token shown once), rotate, revoke.
- views/top.ejs: "API Tokens" nav entry visible to all logged-in users.
- public/js/app.js: app.apiToken client module.
- DEPLOYMENT.md + docs/docker.md: API tokens section.

Co-authored-by: Claude <noreply@anthropic.com>

nodejs/public/js/app.js

@@ -51,3 +51,43 @@ app.host = (function(app){
 		clearCache: clearCache,
 	}
 })(app);
+
+app.apiToken = (function(app){
+	function list(callback){
+		app.api.get('api-token/', function(error, data){
+			callback(error, data);
+		});
+	}
+
+	function get(id, callback){
+		app.api.get('api-token/' + id, function(error, data){
+			callback(error, data);
+		});
+	}
+
+	function add(args, callback){
+		app.api.post('api-token/', args, function(error, data){
+			callback(error, data);
+		});
+	}
+
+	function update(args, callback){
+		app.api.put('api-token/' + args.id, args, function(error, data){
+			callback(error, data);
+		});
+	}
+
+	function remove(args, callback){
+		app.api.delete('api-token/' + args.id, function(error, data){
+			callback(error, data);
+		});
+	}
+
+	function rotate(args, callback){
+		app.api.post('api-token/' + args.id + '/rotate', {}, function(error, data){
+			callback(error, data);
+		});
+	}
+
+	return {list, get, add, update, remove, rotate};
+})(app);