Add visual workflow builder, fix critical bugs, and add Arabic i18n support

src/js/workflow/nodes/merge-node.ts

@@ -0,0 +1,40 @@
+import { ClassicPreset } from 'rete';
+import { BaseWorkflowNode } from './base-node';
+import { pdfSocket } from '../sockets';
+import type { SocketData } from '../types';
+import { extractAllPdfs } from '../types';
+import { mergePdfs } from '../../utils/pdf-operations';
+import { PDFDocument } from 'pdf-lib';
+
+export class MergeNode extends BaseWorkflowNode {
+  readonly category = 'Organize & Manage' as const;
+  readonly icon = 'ph-browsers';
+  readonly description = 'Combine multiple PDFs into one';
+
+  constructor() {
+    super('Merge PDFs');
+    this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDFs', true));
+    this.addOutput('pdf', new ClassicPreset.Output(pdfSocket, 'Merged PDF'));
+  }
+
+  async data(
+    inputs: Record<string, SocketData[]>
+  ): Promise<Record<string, SocketData>> {
+    const allInputs = Object.values(inputs).flat();
+    const allPdfs = extractAllPdfs(allInputs);
+    if (allPdfs.length === 0)
+      throw new Error('No PDFs connected to Merge node');
+
+    const mergedBytes = await mergePdfs(allPdfs.map((p) => p.bytes));
+    const mergedDoc = await PDFDocument.load(mergedBytes);
+
+    return {
+      pdf: {
+        type: 'pdf',
+        document: mergedDoc,
+        bytes: mergedBytes,
+        filename: 'merged.pdf',
+      },
+    };
+  }
+}