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

app/platform/dashboard/page.tsx

@@ -1,5 +1,6 @@
 "use client";
 
+import type { PlatformUserRole } from "@prisma/client";
 import {
   Activity,
   BarChart3,
@@ -57,7 +58,7 @@ interface PlatformSession {
     email: string;
     name?: string;
     isPlatformUser: boolean;
-    platformRole: string;
+    platformRole: PlatformUserRole;
   };
 }