Restore accidentally removed files, a few additional import/calculation fixes

inventory-server/dashboard/auth-server/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "auth-server",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "dependencies": {
+    "cookie-parser": "^1.4.7",
+    "cors": "^2.8.5",
+    "date-fns": "^4.1.0",
+    "date-fns-tz": "^3.2.0",
+    "dotenv": "^16.4.7",
+    "express": "^4.21.1",
+    "express-session": "^1.18.1",
+    "jsonwebtoken": "^9.0.2"
+  }
+}