refactor: move all TypeScript interfaces to centralized src/js/types folder

- Create type files with barrel export via @/types alias
- Update logic files to use centralized type imports

src/js/types/add-blank-page-type.ts

@@ -0,0 +1,6 @@
+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface AddBlankPageState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+}

src/js/types/add-watermark-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface AddWatermarkState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+}

src/js/types/alternate-merge-page-type.ts

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+export interface AlternateMergeState {
+    files: File[];
+    pdfBytes: Map<string, ArrayBuffer>;
+    pdfDocs: Map<string, any>;
+}

src/js/types/attachment-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface AddAttachmentState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+    attachments: File[];
+}

src/js/types/background-color-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface BackgroundColorState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+}

src/js/types/change-permissions-type.ts

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+export interface ChangePermissionsState {
+    file: File | null;
+}

src/js/types/combine-single-page-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface CombineSinglePageState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+}

src/js/types/compare-pdfs-type.ts

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+import * as pdfjsLib from 'pdfjs-dist';
+
+export interface CompareState {
+    pdfDoc1: pdfjsLib.PDFDocumentProxy | null;
+    pdfDoc2: pdfjsLib.PDFDocumentProxy | null;
+    currentPage: number;
+    viewMode: 'overlay' | 'side-by-side';
+    isSyncScroll: boolean;
+}

src/js/types/crop-pdf-type.ts

@@ -0,0 +1,8 @@
+export interface CropperState {
+    pdfDoc: any;
+    currentPageNum: number;
+    cropper: any;
+    originalPdfBytes: ArrayBuffer | null;
+    pageCrops: Record<number, any>;
+    file: File | null;
+}

src/js/types/decrypt-pdf-type.ts

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+export interface DecryptPdfState {
+    file: File | null;
+}

src/js/types/delete-pages-type.ts

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+export interface DeletePagesState {
+    file: File | null;
+    pdfDoc: any;
+    pdfJsDoc: any;
+    totalPages: number;
+    pagesToDelete: Set<number>;
+}

src/js/types/digital-sign-type.ts

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+import { forge } from "zgapdfsigner";
+
+export interface SignatureInfo {
+    reason?: string;
+    location?: string;
+    contactInfo?: string;
+    name?: string;
+}
+
+export interface CertificateData {
+    p12Buffer: ArrayBuffer;
+    password: string;
+    certificate: forge.pki.Certificate;
+}
+
+export interface SignPdfOptions {
+    signatureInfo?: SignatureInfo;
+    visibleSignature?: VisibleSignatureOptions;
+}
+
+export interface VisibleSignatureOptions {
+    enabled: boolean;
+    imageData?: ArrayBuffer;
+    imageType?: 'png' | 'jpeg' | 'webp';
+    x: number;
+    y: number;
+    width: number;
+    height: number;
+    page: number | string;
+    text?: string;
+    textColor?: string;
+    textSize?: number;
+}
+
+export interface DigitalSignState {
+    pdfFile: File | null;
+    pdfBytes: Uint8Array | null;
+    certFile: File | null;
+    certData: CertificateData | null;
+    sigImageData: ArrayBuffer | null;
+    sigImageType: 'png' | 'jpeg' | 'webp' | null;
+}

src/js/types/divide-pages-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface DividePagesState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+    totalPages: number;
+}

src/js/types/edit-attachments-type.ts

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+export interface AttachmentInfo {
+    index: number;
+    name: string;
+    page: number;
+    data: Uint8Array;
+}
+
+export interface EditAttachmentState {
+    file: File | null;
+    allAttachments: AttachmentInfo[];
+    attachmentsToRemove: Set<number>;
+}

src/js/types/edit-metadata-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface EditMetadataState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+}

src/js/types/encrypt-pdf-type.ts

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+export interface EncryptPdfState {
+    file: File | null;
+}

src/js/types/extract-attachments-type.ts

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+export interface ExtractAttachmentsState {
+    files: File[];
+}

src/js/types/extract-images-type.ts

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+export interface ExtractedImage {
+    data: Blob;
+    width: number;
+    height: number;
+    pageNumber: number;
+    imageIndex: number;
+}

src/js/types/extract-pages-type.ts

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+export interface ExtractPagesState {
+    file: File | null;
+    pdfBytes: ArrayBuffer | null;
+    totalPages: number;
+}

src/js/types/fix-page-size-type.ts

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+export interface FixPageSizeState {
+    file: File | null;
+}

src/js/types/flatten-pdf-type.ts

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+export interface FlattenPdfState {
+    files: File[];
+}

src/js/types/header-footer-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface HeaderFooterState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+}

src/js/types/index.ts

@@ -1,2 +1,48 @@
-export * from './ocr.js';
-export * from './form-creator.js';
+export * from './ocr-type.js';
+export * from './form-creator-type.js';
+export * from './digital-sign-type.js';
+export * from './attachment-type.js';
+export * from './edit-attachments-type.js';
+export * from './edit-metadata-type.js';
+export * from './divide-pages-type.js';
+export * from './alternate-merge-page-type.js';
+export * from './add-blank-page-type.js';
+export * from './compare-pdfs-type.js';
+export * from './fix-page-size-type.js';
+export * from './view-metadata-type.js';
+export * from './header-footer-type.js';
+export * from './encrypt-pdf-type.js';
+export * from './flatten-pdf-type.js';
+export * from './crop-pdf-type.js';
+export * from './background-color-type.js';
+export * from './posterize-type.js';
+export * from './decrypt-pdf-type.js';
+export * from './combine-single-page-type.js';
+export * from './change-permissions-type.js';
+export * from './validate-signature-type.js';
+export * from './remove-restrictions-type.js';
+export * from './page-dimensions-type.js';
+export * from './extract-attachments-type.js';
+export * from './pdf-multi-tool-type.js';
+export * from './ocr-pdf-type.js';
+export * from './delete-pages-type.js';
+export * from './invert-colors-type.js';
+export * from './table-of-contents-type.js';
+export * from './organize-pdf-type.js';
+export * from './merge-pdf-type.js';
+export * from './extract-images-type.js';
+export * from './extract-pages-type.js';
+export * from './pdf-layers-type.js';
+export * from './sanitize-pdf-type.js';
+export * from './reverse-pages-type.js';
+export * from './text-color-type.js';
+export * from './n-up-pdf-type.js';
+export * from './linearize-pdf-type.js';
+export * from './remove-metadata-type.js';
+export * from './rotate-pdf-type.js';
+export * from './pdf-booklet-type.js';
+export * from './page-numbers-type.js';
+export * from './pdf-to-zip-type.js';
+export * from './sign-pdf-type.js';
+export * from './add-watermark-type.js';
+

src/js/types/invert-colors-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface InvertColorsState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+}

src/js/types/linearize-pdf-type.ts

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+export interface LinearizePdfState {
+    files: File[];
+}

src/js/types/merge-pdf-type.ts

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+export interface MergeState {
+    files: File[];
+    pdfBytes: Map<string, ArrayBuffer>;
+    pdfDocs: Map<string, any>;
+}

src/js/types/n-up-pdf-type.ts

@@ -0,0 +1,5 @@
+export interface NUpState {
+    file: File | null;
+    pdfBytes: ArrayBuffer | null;
+    totalPages: number;
+}

src/js/types/ocr-pdf-type.ts

@@ -0,0 +1,10 @@
+export interface OcrWord {
+    text: string;
+    bbox: { x0: number; y0: number; x1: number; y1: number };
+    confidence: number;
+}
+
+export interface OcrState {
+    file: File | null;
+    searchablePdfBytes: Uint8Array | null;
+}

src/js/types/organize-pdf-type.ts

@@ -0,0 +1,6 @@
+export interface OrganizeState {
+    file: File | null;
+    pdfBytes: ArrayBuffer | null;
+    totalPages: number;
+    pageOrder: number[];
+}

src/js/types/page-dimensions-type.ts

@@ -0,0 +1,6 @@
+import { PDFDocument } from 'pdf-lib';
+
+export interface PageDimensionsState {
+    file: File | null;
+    pdfDoc: PDFDocument | null;
+}

src/js/types/page-numbers-type.ts

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+export interface PageNumbersState {
+    file: File | null;
+}

src/js/types/pdf-booklet-type.ts

@@ -0,0 +1,5 @@
+export interface BookletState {
+    file: File | null;
+    pdfBytes: ArrayBuffer | null;
+    totalPages: number;
+}

src/js/types/pdf-layers-type.ts

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+export interface LayerData {
+    name: string;
+    visible: boolean;
+    locked: boolean;
+}

src/js/types/pdf-multi-tool-type.ts

@@ -0,0 +1,10 @@
+export interface MultiToolPageData {
+    id: string;
+    originalPdfId: string;
+    pageIndex: number;
+    thumbnail: string;
+    width: number;
+    height: number;
+    rotation: number;
+    isBlank?: boolean;
+}

src/js/types/pdf-to-zip-type.ts

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+export interface PdfToZipState {
+    files: File[];
+}

src/js/types/posterize-type.ts

@@ -0,0 +1,9 @@
+import * as pdfjsLib from 'pdfjs-dist';
+
+export interface PosterizeState {
+    file: File | null;
+    pdfJsDoc: pdfjsLib.PDFDocumentProxy | null;
+    pdfBytes: Uint8Array | null;
+    pageSnapshots: Record<number, ImageData>;
+    currentPage: number;
+}

src/js/types/remove-metadata-type.ts

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+export interface RemoveMetadataState {
+    file: File | null;
+}

src/js/types/remove-restrictions-type.ts

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+export interface RemoveRestrictionsState {
+    file: File | null;
+}

src/js/types/reverse-pages-type.ts

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+export interface ReverseState {
+    file: File | null;
+    pdfBytes: ArrayBuffer | null;
+    totalPages: number;
+}

src/js/types/rotate-pdf-type.ts

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+export interface RotateState {
+    file: File | null;
+    pdfBytes: ArrayBuffer | null;
+    totalPages: number;
+    pageRotations: Map<number, number>;
+}

src/js/types/sanitize-pdf-type.ts

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+import { PDFDocument } from 'pdf-lib';
+
+export interface SanitizePdfState {
+    file: File | null;
+    pdfDoc: PDFDocument | null;
+}

src/js/types/sign-pdf-type.ts

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+export interface SignPdfState {
+    file: File | null;
+    pdfBytes: ArrayBuffer | null;
+    signatureData: string | null;
+}

src/js/types/table-of-contents-type.ts

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+export interface GenerateTOCMessage {
+    type: 'generateTOC';
+    pdfBytes: ArrayBuffer;
+    title: string;
+    headerColor: string;
+    fontColor: string;
+    fontSize: number;
+}
+
+export interface TOCSuccessResponse {
+    type: 'success';
+    pdfBytes: ArrayBuffer;
+}
+
+export interface TOCErrorResponse {
+    type: 'error';
+    message: string;
+}

src/js/types/text-color-type.ts

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+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+export interface TextColorState {
+    file: File | null;
+    pdfDoc: PDFLibDocument | null;
+}

src/js/types/validate-signature-type.ts

@@ -0,0 +1,47 @@
+import forge from 'node-forge';
+
+export interface SignatureValidationResult {
+    signatureIndex: number;
+    isValid: boolean;
+    signerName: string;
+    signerOrg?: string;
+    signerEmail?: string;
+    issuer: string;
+    issuerOrg?: string;
+    signatureDate?: Date;
+    validFrom: Date;
+    validTo: Date;
+    isExpired: boolean;
+    isSelfSigned: boolean;
+    isTrusted: boolean;
+    algorithms: {
+        digest: string;
+        signature: string;
+    };
+    serialNumber: string;
+    reason?: string;
+    location?: string;
+    contactInfo?: string;
+    byteRange?: number[];
+    coverageStatus: 'full' | 'partial' | 'unknown';
+    errorMessage?: string;
+}
+
+export interface ExtractedSignature {
+    index: number;
+    contents: Uint8Array;
+    byteRange: number[];
+    reason?: string;
+    location?: string;
+    contactInfo?: string;
+    name?: string;
+    signingTime?: string;
+}
+
+export interface ValidateSignatureState {
+    pdfFile: File | null;
+    pdfBytes: Uint8Array | null;
+    results: SignatureValidationResult[];
+    trustedCertFile: File | null;
+    trustedCert: forge.pki.Certificate | null;
+}

src/js/types/view-metadata-type.ts

@@ -0,0 +1,4 @@
+export interface ViewMetadataState {
+    file: File | null;
+    metadata: Record<string, unknown>;
+}