Refactor and enhance type safety across various modules

- Updated function parameters and return types in `page-preview.ts`, `pdf-decrypt.ts`, and `pymupdf-loader.ts` for improved type safety.
- Introduced type definitions for `CpdfInstance`, `PyMuPDFInstance`, and other related types to ensure better type checking.
- Enhanced error handling in `sanitize.ts` by creating a utility function for error messages.
- Removed unnecessary type assertions and improved type inference in `editor.ts`, `serialization.ts`, and `tools.test.ts`.
- Added type definitions for markdown-it plugins to improve compatibility and type safety.
- Enforced stricter TypeScript settings by enabling `noImplicitAny` in `tsconfig.json`.
- Cleaned up test files by refining type assertions and ensuring consistency in type usage.

src/js/logic/redact.ts

@@ -2,16 +2,18 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile } from '../utils/helpers.js';
 import { state } from '../state.js';
 
+import type { RedactionRect } from '@/types';
+
 // @ts-expect-error TS(2339) FIXME: Property 'PDFLib' does not exist on type 'Window &... Remove this comment to see the full error message
 const { rgb } = window.PDFLib;
 
-export async function redact(redactions: any, canvasScale: any) {
+export async function redact(redactions: RedactionRect[], canvasScale: number) {
   showLoader('Applying redactions...');
   try {
     const pdfPages = state.pdfDoc.getPages();
     const conversionScale = 1 / canvasScale;
 
-    redactions.forEach((r: any) => {
+    redactions.forEach((r: RedactionRect) => {
       const page = pdfPages[r.pageIndex];
       const { height: pageHeight } = page.getSize();
 
@@ -32,7 +34,7 @@ export async function redact(redactions: any, canvasScale: any) {
 
     const redactedBytes = await state.pdfDoc.save();
     downloadFile(
-      new Blob([redactedBytes], { type: 'application/pdf' }),
+      new Blob([new Uint8Array(redactedBytes)], { type: 'application/pdf' }),
       'redacted.pdf'
     );
   } catch (e) {