fix: comprehensive TypeScript/build fixes and modernization

- Update tsconfig to ES2024 target and bundler moduleResolution
- Add dynamic imports for chart.js and recharts (bundle optimization)
- Consolidate 17 useState into useReducer in sessions page
- Fix 18 .js extension imports across lib files
- Add type declarations for @rapideditor/country-coder
- Fix platform user types (PlatformUserRole enum)
- Fix Calendar component prop types
- Centralize next-auth type augmentation
- Add force-dynamic to all API routes (prevent build-time prerender)
- Fix Prisma JSON null handling with Prisma.DbNull
- Fix various type mismatches (SessionMessage, ImportRecord, etc.)
- Export ButtonProps from button component
- Update next-themes import path
- Replace JSX.Element with React.ReactElement
- Remove obsolete debug scripts and pnpm lockfile
- Downgrade eslint to v8 for next compatibility

lib/platform-auth.ts

@@ -3,39 +3,7 @@ import type { NextAuthOptions } from "next-auth";
 import CredentialsProvider from "next-auth/providers/credentials";
 import { prisma } from "./prisma";
 
-// Define the shape of the JWT token for platform users
-declare module "next-auth/jwt" {
-  interface JWT {
-    isPlatformUser?: boolean;
-    platformRole?: string;
-  }
-}
-
-// Define the shape of the session object for platform users
-declare module "next-auth" {
-  interface Session {
-    user: {
-      id?: string;
-      name?: string;
-      email?: string;
-      image?: string;
-      isPlatformUser?: boolean;
-      platformRole?: string;
-      companyId?: string;
-      role?: string;
-    };
-  }
-
-  interface User {
-    id: string;
-    email: string;
-    name?: string;
-    isPlatformUser?: boolean;
-    platformRole?: string;
-    companyId?: string;
-    role?: string;
-  }
-}
+// Type augmentation moved to types/next-auth.d.ts
 
 export const platformAuthOptions: NextAuthOptions = {
   providers: [