feat: initialize project with Next.js, Prisma, and Tailwind CSS

- Add package.json with dependencies and scripts for Next.js and Prisma
- Implement API routes for session management, user authentication, and company configuration
- Create database schema for Company, User, and Session models in Prisma
- Set up authentication with NextAuth and JWT
- Add password reset functionality and user registration endpoint
- Configure Tailwind CSS and PostCSS for styling
- Implement metrics and dashboard settings API endpoints

prisma/schema.prisma

@@ -0,0 +1,56 @@
+// Database schema, one company = one org, linked to users and CSV config
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "sqlite"
+  url      = "file:./dev.db"
+}
+
+model Company {
+  id                String   @id @default(uuid())
+  name              String
+  csvUrl            String   // where to fetch CSV
+  csvUsername       String?  // for basic auth
+  csvPassword       String?
+  sentimentAlert    Float?   // e.g. alert threshold for negative chats
+  dashboardOpts     String?  // JSON blob for per-company dashboard preferences
+  users             User[]
+  sessions          Session[]
+  createdAt         DateTime @default(now())
+  updatedAt         DateTime @updatedAt
+}
+
+model User {
+  id        String   @id @default(uuid())
+  email     String   @unique
+  password  String   // hashed, use bcrypt
+  company   Company  @relation(fields: [companyId], references: [id])
+  companyId String
+  role      String   // 'admin' | 'user' | 'auditor'
+  resetToken String?
+  resetTokenExpiry DateTime?
+}
+
+model Session {
+  id                  String   @id
+  company             Company  @relation(fields: [companyId], references: [id])
+  companyId           String
+  startTime           DateTime
+  endTime             DateTime
+  ipAddress           String?
+  country             String?
+  language            String?
+  messagesSent        Int?
+  sentiment           Float?
+  escalated           Boolean?
+  forwardedHr         Boolean?
+  fullTranscriptUrl   String?
+  avgResponseTime     Float?
+  tokens              Int?
+  tokensEur           Float?
+  category            String?
+  initialMsg          String?
+  createdAt           DateTime @default(now())
+}