chore: full implementation of code review recommendations (security, quality, tests)

package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@types/leaflet": "^1.9.21",
+        "bcryptjs": "^3.0.3",
         "gray-matter": "^4.0.3",
         "js-yaml": "^4.1.1",
         "leaflet": "^1.9.4",
@@ -20,6 +21,7 @@
       },
       "devDependencies": {
         "@playwright/test": "^1.58.2",
+        "@types/bcryptjs": "^2.4.6",
         "@types/js-yaml": "^4.0.9",
         "@types/node": "^20",
         "@types/react": "^19",
@@ -2089,6 +2091,13 @@
         "tslib": "^2.4.0"
       }
     },
+    "node_modules/@types/bcryptjs": {
+      "version": "2.4.6",
+      "resolved": "https://registry.npmjs.org/@types/bcryptjs/-/bcryptjs-2.4.6.tgz",
+      "integrity": "sha512-9xlo6R2qDs5uixm0bcIqCeMCE6HiQsIyel9KQySStiyqNl2tnj2mP3DX1Nf56MD6KMenNNlBBsy3LJ7gUEQPXQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/chai": {
       "version": "5.2.3",
       "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.2.3.tgz",
@@ -3190,6 +3199,15 @@
         "baseline-browser-mapping": "dist/cli.js"
       }
     },
+    "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/brace-expansion": {
       "version": "1.1.12",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.12.tgz",