Add Dark Mode, Password Hashing for better security , Settings Page, Policy PDF in Policy section,UI Changes

backend/prisma/schema.prisma

@@ -1,4 +1,3 @@
-// Generator to create Prisma Client
 generator client {
   provider      = "prisma-client-js"
   binaryTargets = ["native", "darwin-arm64", "linux-musl-arm64-openssl-3.0.x"]
@@ -40,7 +39,7 @@ enum Designation {
 model User {
   profileId String @id @default(uuid())
   userName  String
-  email     String @unique @db.Text
+  email     String @unique
   password  String
 
   institute   Institute?
@@ -54,9 +53,9 @@ model User {
 }
 
 model Application {
-  applicationId String    @id @default(uuid())
+  applicationId String      @id @default(uuid())
   applicantId   String
-  applicant     User      @relation("AppliedApplications", fields: [applicantId], references: [profileId])
+  applicant     User        @relation("AppliedApplications", fields: [applicantId], references: [profileId])
   institute     Institute
   department    String