Add bcryptjs password hashing lib and AdminUser model

Add passwordHash utility module wrapping bcryptjs for secure password hashing, and AdminUser Mongoose model with username (unique, lowercase), passwordHash, role (admin/staff), and active fields.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/libs/passwordHash.js

+"use strict";
+var bcrypt = require("bcryptjs");
+
+function hash(plain) {
+  return bcrypt.hashSync(plain, 10);
+}
+
+function compare(plain, hashed) {
+  return bcrypt.compareSync(plain, hashed);
+}
+
+module.exports = {
+  hash: hash,
+  compare: compare,
+};

app/models/AdminUser.js

+"use strict";
+var mongoose = require("mongoose");
+var Schema = mongoose.Schema;
+
+var AdminUserSchema = new Schema(
+  {
+    username: { type: String, required: true, unique: true, lowercase: true, trim: true },
+    passwordHash: { type: String, required: true },
+    role: { type: String, enum: ["admin", "staff"], default: "staff" },
+    active: { type: Boolean, default: true },
+  },
+  { timestamps: true }
+);
+
+module.exports = mongoose.model("AdminUser", AdminUserSchema);

package-lock.json

@@ -10,6 +10,7 @@
             "hasInstallScript": true,
             "dependencies": {
                 "async": "^2.0.1",
+                "bcryptjs": "^3.0.3",
                 "body-parser": "^1.9.3",
                 "bunyan": "^1.8.1",
                 "chalk": "^0.5.1",
@@ -491,6 +492,15 @@
                 "tweetnacl": "^0.14.3"
             }
         },
+        "node_modules/bcryptjs": {
+            "version": "3.0.3",
+            "resolved": "https://registry.npmjs.org/bcryptjs/-/bcryptjs-3.0.3.tgz",
+            "integrity": "sha512-GlF5wPWnSa/X5LKM1o0wz0suXIINz1iHRLvTS+sLyi7XPbe5ycmYI3DlZqVGZZtDgl4DmasFg7gOB3JYbphV5g==",
+            "license": "BSD-3-Clause",
+            "bin": {
+                "bcrypt": "bin/bcrypt"
+            }
+        },
         "node_modules/binary-extensions": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.0.0.tgz",

package.json

@@ -15,6 +15,7 @@
     },
     "dependencies": {
         "async": "^2.0.1",
+        "bcryptjs": "^3.0.3",
         "body-parser": "^1.9.3",
         "bunyan": "^1.8.1",
         "chalk": "^0.5.1",