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/processingStatusManager.ts

@@ -1,10 +1,8 @@
-import { ProcessingStage, ProcessingStatus } from "@prisma/client";
-import { prisma } from "./prisma.js";
+import { Prisma, ProcessingStage, ProcessingStatus } from "@prisma/client";
+import { prisma } from "./prisma";
 
 // Type-safe metadata interfaces
-interface ProcessingMetadata {
-  [key: string]: string | number | boolean | null | undefined;
-}
+type ProcessingMetadata = Prisma.InputJsonObject;
 
 interface WhereClause {
   status: ProcessingStatus;
@@ -50,14 +48,14 @@ export async function startStage(
       status: ProcessingStatus.IN_PROGRESS,
       startedAt: new Date(),
       errorMessage: null,
-      metadata: metadata || null,
+      metadata: metadata ?? Prisma.DbNull,
     },
     create: {
       sessionId,
       stage,
       status: ProcessingStatus.IN_PROGRESS,
       startedAt: new Date(),
-      metadata: metadata || null,
+      metadata: metadata ?? Prisma.DbNull,
     },
   });
 }
@@ -78,7 +76,7 @@ export async function completeStage(
       status: ProcessingStatus.COMPLETED,
       completedAt: new Date(),
       errorMessage: null,
-      metadata: metadata || null,
+      metadata: metadata ?? Prisma.DbNull,
     },
     create: {
       sessionId,
@@ -86,7 +84,7 @@ export async function completeStage(
       status: ProcessingStatus.COMPLETED,
       startedAt: new Date(),
       completedAt: new Date(),
-      metadata: metadata || null,
+      metadata: metadata ?? Prisma.DbNull,
     },
   });
 }
@@ -109,7 +107,7 @@ export async function failStage(
       completedAt: new Date(),
       errorMessage,
       retryCount: { increment: 1 },
-      metadata: metadata || null,
+      metadata: metadata ?? Prisma.DbNull,
     },
     create: {
       sessionId,
@@ -119,7 +117,7 @@ export async function failStage(
       completedAt: new Date(),
       errorMessage,
       retryCount: 1,
-      metadata: metadata || null,
+      metadata: metadata ?? Prisma.DbNull,
     },
   });
 }