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/workflow/editor.ts

@@ -10,7 +10,6 @@ import { DataflowEngine } from 'rete-engine';
 import type { DataflowEngineScheme } from 'rete-engine';
 import { LitElement, html } from 'lit';
 import type { BaseWorkflowNode } from './nodes/base-node';
-// @ts-ignore -- Vite ?inline import for injecting into Shadow DOM
 import phosphorCSS from '@phosphor-icons/web/regular?inline';
 
 // Shared stylesheet for Phosphor icons (font-face already loaded globally, strip it)
@@ -305,8 +304,8 @@ export async function createWorkflowEditor(
 
   // Override connection path to use vertical bezier curves (top-to-bottom flow)
   litPlugin.addPipe((context) => {
-    if ((context as any).type === 'connectionpath') {
-      const { points } = (context as any).data;
+    if ('type' in context && context.type === 'connectionpath') {
+      const { points } = context.data;
       const [start, end] = points as [
         { x: number; y: number },
         { x: number; y: number },
@@ -318,7 +317,7 @@ export async function createWorkflowEditor(
       const path = `M ${start.x} ${start.y} C ${start.x} ${start.y + dy} ${end.x} ${end.y - dy} ${end.x} ${end.y}`;
       return {
         ...context,
-        data: { ...(context as any).data, path },
+        data: { ...context.data, path },
       } as typeof context;
     }
     return context;