feat(auth): implement better authentication system with user sessions and password management

- Added user, session, account, and verification models to Prisma schema.
- Integrated better-auth for user authentication with email and password.
- Created auth middleware for session validation.
- Implemented auth context and client in frontend for managing user sessions.
- Added login and settings pages for user authentication and password management.
- Updated routes to include authentication checks and user-specific content.
- Enhanced UI components to reflect authentication state.

apps/backend/prisma/schema.prisma

@@ -1,8 +1,3 @@
-// This is your Prisma schema file,
-// learn more about it in the docs: https://pris.ly/d/prisma-schema
-
-// Get a free hosted Postgres database in seconds: `npx create-db`
-
 generator client {
   provider = "prisma-client"
   output   = "../src/generated/prisma"
@@ -12,6 +7,68 @@ datasource db {
   provider = "postgresql"
 }
 
+model User {
+  id            String    @id
+  name          String
+  email         String    @unique
+  emailVerified Boolean   @default(false)
+  image         String?
+  createdAt     DateTime  @default(now())
+  updatedAt     DateTime  @updatedAt
+
+  sessions Session[]
+  accounts Account[]
+
+  @@map("user")
+}
+
+model Session {
+  id        String   @id
+  expiresAt DateTime
+  token     String   @unique
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  ipAddress String?
+  userAgent String?
+  userId    String
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@index([userId])
+  @@map("session")
+}
+
+model Account {
+  id                    String    @id
+  accountId             String
+  providerId            String
+  userId                String
+  user                  User      @relation(fields: [userId], references: [id], onDelete: Cascade)
+  accessToken           String?
+  refreshToken          String?
+  idToken               String?
+  accessTokenExpiresAt  DateTime?
+  refreshTokenExpiresAt DateTime?
+  scope                 String?
+  password              String?
+  createdAt             DateTime  @default(now())
+  updatedAt             DateTime  @updatedAt
+
+  @@index([userId])
+  @@map("account")
+}
+
+model Verification {
+  id         String   @id
+  identifier String
+  value      String
+  expiresAt  DateTime
+  createdAt  DateTime @default(now())
+  updatedAt  DateTime @updatedAt
+
+  @@index([identifier])
+  @@map("verification")
+}
+
 enum QuoteType {
   BLUE
   BNA