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/transcriptParser.ts

@@ -1,5 +1,5 @@
 // Transcript parsing utility for converting raw transcript content into structured messages
-import { prisma } from "./prisma.js";
+import { prisma } from "./prisma";
 
 export interface ParsedMessage {
   sessionId: string;
@@ -156,7 +156,7 @@ export function parseTranscriptToMessages(
     }
 
     // Calculate timestamps - use parsed timestamps if available, otherwise distribute across session duration
-    interface MessageWithTimestamp extends ParsedMessage {
+    interface MessageWithTimestamp extends Omit<ParsedMessage, "timestamp"> {
       timestamp: Date | string;
     }
     const hasTimestamps = messages.some(