Fix lintineg errors

frontend/src/components/annotation/shared/BaseAnnotationTool.tsx

@@ -1,5 +1,5 @@
 import React, { useState } from 'react';
-import { Stack, Tabs, Alert, Text } from '@mantine/core';
+import { Stack, Alert, Text } from '@mantine/core';
 import { useTranslation } from 'react-i18next';
 import { DrawingControls } from './DrawingControls';
 import { ColorPicker } from './ColorPicker';
@@ -29,10 +29,8 @@ export const BaseAnnotationTool: React.FC<BaseAnnotationToolProps> = ({
   const { t } = useTranslation();
   const {
     activateSignaturePlacementMode,
-    deactivateDrawMode,
     undo,
-    redo,
+    redo
-    isPlacementMode
   } = usePDFAnnotation();
 
   const [selectedColor, setSelectedColor] = useState('#000000');

frontend/src/components/annotation/shared/DrawingCanvas.tsx

@@ -41,7 +41,7 @@ export const DrawingCanvas: React.FC<DrawingCanvasProps> = ({
   const [isDrawing, setIsDrawing] = useState(false);
   const [isModalDrawing, setIsModalDrawing] = useState(false);
   const [isModalOpen, setIsModalOpen] = useState(false);
-  const [signatureData, setSignatureData] = useState<string | null>(null);
+  const [, setSignatureData] = useState<string | null>(null);
 
   // Drawing functions for main canvas
   const startDrawing = useCallback((e: React.MouseEvent<HTMLCanvasElement>) => {

frontend/src/components/annotation/tools/DrawingTool.tsx

@@ -1,9 +1,7 @@
 import React, { useState } from 'react';
-import { Stack, Paper, Text, Group } from '@mantine/core';
+import { Stack } from '@mantine/core';
 import { BaseAnnotationTool } from '../shared/BaseAnnotationTool';
 import { DrawingCanvas } from '../shared/DrawingCanvas';
-import { ColorSwatchButton } from '../shared/ColorPicker';
-import PenSizeSelector from '../../tools/sign/PenSizeSelector';
 
 interface DrawingToolProps {
   onDrawingChange?: (data: string | null) => void;
@@ -14,7 +12,7 @@ export const DrawingTool: React.FC<DrawingToolProps> = ({
   onDrawingChange,
   disabled = false
 }) => {
-  const [selectedColor, setSelectedColor] = useState('#000000');
+  const [selectedColor] = useState('#000000');
   const [penSize, setPenSize] = useState(2);
   const [penSizeInput, setPenSizeInput] = useState('2');
 

frontend/src/components/annotation/tools/ImageTool.tsx

@@ -12,7 +12,7 @@ export const ImageTool: React.FC<ImageToolProps> = ({
   onImageChange,
   disabled = false
 }) => {
-  const [imageData, setImageData] = useState<string | null>(null);
+  const [, setImageData] = useState<string | null>(null);
 
   const handleImageUpload = async (file: File | null) => {
     if (file && !disabled) {

frontend/src/components/shared/RightRail.tsx

@@ -17,11 +17,6 @@ import { ViewerContext } from '../../contexts/ViewerContext';
 import { useSignature } from '../../contexts/SignatureContext';
 
 import { parseSelection } from '../../utils/bulkselection/parseSelection';
-import { flattenSignatures } from '../../utils/signatureFlattening';
-import { PDFDocument, rgb } from 'pdf-lib';
-import { generateThumbnailWithMetadata } from '../../utils/thumbnailUtils';
-import { createProcessedFile } from '../../contexts/file/fileActions';
-import { createNewStirlingFileStub, createStirlingFile } from '../../types/fileContext';
 
 
 export default function RightRail() {

frontend/src/components/tools/sign/SignSettings.tsx

@@ -1,6 +1,6 @@
 import React, { useState, useEffect } from 'react';
 import { useTranslation } from "react-i18next";
-import { Stack, Button, Text, Alert, Tabs, Group, Paper } from '@mantine/core';
+import { Stack, Button, Text, Alert, Tabs } from '@mantine/core';
 import { SignParameters } from "../../../hooks/tools/sign/useSignParameters";
 import { SuggestedToolsSection } from "../shared/SuggestedToolsSection";
 
@@ -28,10 +28,8 @@ const SignSettings = ({
   parameters,
   onParameterChange,
   disabled = false,
-  onActivateDrawMode,
   onActivateSignaturePlacement,
   onDeactivateSignature,
-  onUpdateDrawSettings,
   onUndo,
   onRedo,
   onSave

frontend/src/components/viewer/EmbedPdfViewer.tsx

@@ -189,7 +189,7 @@ const EmbedPdfViewerContent = ({
               enableSignature={isSignatureMode}
               signatureApiRef={signatureApiRef as React.RefObject<any>}
               historyApiRef={historyApiRef as React.RefObject<any>}
-              onSignatureAdded={(annotation) => {
+              onSignatureAdded={() => {
                 // Handle signature added - for debugging, enable console logs as needed
                 // Future: Handle signature completion
               }}

frontend/src/components/viewer/HistoryAPIBridge.tsx

@@ -1,4 +1,4 @@
-import React, { useImperativeHandle, forwardRef, useEffect } from 'react';
+import { useImperativeHandle, forwardRef, useEffect } from 'react';
 import { useHistoryCapability } from '@embedpdf/plugin-history/react';
 import { useAnnotationCapability } from '@embedpdf/plugin-annotation/react';
 import { useSignature } from '../../contexts/SignatureContext';
@@ -11,9 +11,10 @@ export interface HistoryAPI {
   canRedo: () => boolean;
 }
 
+// eslint-disable-next-line @typescript-eslint/no-empty-object-type
 export interface HistoryAPIBridgeProps {}
 
-export const HistoryAPIBridge = forwardRef<HistoryAPI, HistoryAPIBridgeProps>((props, ref) => {
+export const HistoryAPIBridge = forwardRef<HistoryAPI, HistoryAPIBridgeProps>(function HistoryAPIBridge(_props, ref) {
   const { provides: historyApi } = useHistoryCapability();
   const { provides: annotationApi } = useAnnotationCapability();
   const { getImageData, storeImageData } = useSignature();
@@ -38,7 +39,7 @@ export const HistoryAPIBridge = forwardRef<HistoryAPI, HistoryAPIBridgeProps>((p
       if (event.type === 'create' && event.committed) {
         // Check if this is a STAMP annotation (signature) that might need image data restoration
         if (annotation && annotation.type === 13 && annotation.id) {
-          const storedImageData = getImageData(annotation.id);
+          getImageData(annotation.id);
 
           // Delay the check to allow the annotation to be fully created
           setTimeout(() => {

frontend/src/components/viewer/LocalEmbedPDF.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useMemo, useState, useRef } from 'react';
+import React, { useEffect, useMemo, useState } from 'react';
 import { createPluginRegistration } from '@embedpdf/core';
 import { EmbedPDF } from '@embedpdf/core/react';
 import { usePdfiumEngine } from '@embedpdf/engines/react';
@@ -22,7 +22,7 @@ import { Rotation } from '@embedpdf/models';
 
 // Import annotation plugins
 import { HistoryPluginPackage } from '@embedpdf/plugin-history/react';
-import { AnnotationLayer, AnnotationPluginPackage, useAnnotationCapability } from '@embedpdf/plugin-annotation/react';
+import { AnnotationLayer, AnnotationPluginPackage } from '@embedpdf/plugin-annotation/react';
 import { PdfAnnotationSubtype } from '@embedpdf/models';
 import { CustomSearchLayer } from './CustomSearchLayer';
 import { ZoomAPIBridge } from './ZoomAPIBridge';
@@ -50,7 +50,7 @@ interface LocalEmbedPDFProps {
 
 export function LocalEmbedPDF({ file, url, enableSignature = false, onSignatureAdded, signatureApiRef, historyApiRef }: LocalEmbedPDFProps) {
   const [pdfUrl, setPdfUrl] = useState<string | null>(null);
-  const [annotations, setAnnotations] = useState<Array<{id: string, pageIndex: number, rect: any}>>([]);
+  const [, setAnnotations] = useState<Array<{id: string, pageIndex: number, rect: any}>>([]);
 
   // Convert File to URL if needed
   useEffect(() => {

frontend/src/components/viewer/LocalEmbedPDFWithAnnotations.tsx

@@ -21,7 +21,7 @@ import { Rotation } from '@embedpdf/models';
 
 // Import annotation plugins
 import { HistoryPluginPackage } from '@embedpdf/plugin-history/react';
-import { AnnotationLayer, AnnotationPluginPackage, useAnnotationCapability } from '@embedpdf/plugin-annotation/react';
+import { AnnotationLayer, AnnotationPluginPackage } from '@embedpdf/plugin-annotation/react';
 import { PdfAnnotationSubtype } from '@embedpdf/models';
 
 import { CustomSearchLayer } from './CustomSearchLayer';

frontend/src/components/viewer/SignatureAPIBridge.tsx

@@ -1,4 +1,4 @@
-import React, { useImperativeHandle, forwardRef, useEffect } from 'react';
+import { useImperativeHandle, forwardRef, useEffect } from 'react';
 import { useAnnotationCapability } from '@embedpdf/plugin-annotation/react';
 import { PdfAnnotationSubtype, PdfStandardFont, PdfTextAlignment, PdfVerticalAlignment, uuidV4 } from '@embedpdf/models';
 import { SignParameters } from '../../hooks/tools/sign/useSignParameters';
@@ -17,9 +17,10 @@ export interface SignatureAPI {
   getPageAnnotations: (pageIndex: number) => Promise<any[]>;
 }
 
+// eslint-disable-next-line @typescript-eslint/no-empty-object-type
 export interface SignatureAPIBridgeProps {}
 
-export const SignatureAPIBridge = forwardRef<SignatureAPI, SignatureAPIBridgeProps>((props, ref) => {
+export const SignatureAPIBridge = forwardRef<SignatureAPI, SignatureAPIBridgeProps>((_props, ref) => {
   const { provides: annotationApi } = useAnnotationCapability();
   const { signatureConfig, storeImageData } = useSignature();
 

frontend/src/contexts/SignatureContext.tsx

@@ -1,4 +1,4 @@
-import React, { createContext, useContext, useState, ReactNode, useCallback, useRef, useEffect } from 'react';
+import React, { createContext, useContext, useState, ReactNode, useCallback, useRef } from 'react';
 import { SignParameters } from '../hooks/tools/sign/useSignParameters';
 import { SignatureAPI } from '../components/viewer/SignatureAPIBridge';
 import { HistoryAPI } from '../components/viewer/HistoryAPIBridge';

frontend/src/contexts/ViewerContext.tsx

@@ -210,7 +210,7 @@ export const ViewerProvider: React.FC<ViewerProviderProps> = ({ children }) => {
   const [isThumbnailSidebarVisible, setIsThumbnailSidebarVisible] = useState(false);
 
   // Get current navigation state to check if we're in sign mode
-  const { workbench } = useNavigation();
+  useNavigation();
 
   // Bridge registry - bridges register their state and APIs here
   const bridgeRefs = useRef({

frontend/src/tools/Sign.tsx

@@ -8,19 +8,14 @@ import { BaseToolProps, ToolComponent } from "../types/tool";
 import SignSettings from "../components/tools/sign/SignSettings";
 import { useNavigation } from "../contexts/NavigationContext";
 import { useSignature } from "../contexts/SignatureContext";
-import { useFileActions, useFileContext } from "../contexts/FileContext";
+import { useFileContext } from "../contexts/FileContext";
 import { useViewer } from "../contexts/ViewerContext";
-import { generateThumbnailWithMetadata } from "../utils/thumbnailUtils";
-import { createNewStirlingFileStub, createStirlingFile, StirlingFileStub, StirlingFile, FileId, extractFiles } from "../types/fileContext";
-import { createProcessedFile } from "../contexts/file/fileActions";
-import { PDFDocument, PDFName, PDFDict, PDFArray, rgb } from 'pdf-lib';
 import { flattenSignatures } from "../utils/signatureFlattening";
 
 const Sign = (props: BaseToolProps) => {
   const { t } = useTranslation();
   const { setWorkbench } = useNavigation();
-  const { setSignatureConfig, activateDrawMode, activateSignaturePlacementMode, deactivateDrawMode, updateDrawSettings, undo, redo, isPlacementMode, signatureApiRef, getImageData, setSignaturesApplied } = useSignature();
+  const { setSignatureConfig, activateDrawMode, activateSignaturePlacementMode, deactivateDrawMode, updateDrawSettings, undo, redo, signatureApiRef, getImageData, setSignaturesApplied } = useSignature();
-  const { actions } = useFileActions();
   const { consumeFiles, selectors } = useFileContext();
   const { exportActions } = useViewer();
 

frontend/src/utils/signatureFlattening.ts

@@ -55,7 +55,7 @@ export async function flattenSignatures(options: SignatureFlatteningOptions): Pr
               console.log(`Found ${sessionAnnotations.length} session annotations on page ${pageIndex + 1} (out of ${pageAnnotations.length} total)`);
             }
           }
-        } catch (e) {
+        } catch {
           if (pageIndex > 2) break; // Stop after checking first few pages
         }
       }
@@ -93,7 +93,7 @@ export async function flattenSignatures(options: SignatureFlatteningOptions): Pr
       console.log('Attempting to load PDF with PDF-lib...');
 
       // Convert ArrayBuffer to File
-      let blob = new Blob([pdfArrayBuffer], { type: 'application/pdf' });
+      const blob = new Blob([pdfArrayBuffer], { type: 'application/pdf' });
 
       // Get the current file - try from originalFile first, then from all files
       let currentFile = originalFile;
@@ -130,7 +130,7 @@ export async function flattenSignatures(options: SignatureFlatteningOptions): Pr
               throwOnInvalidObject: false
             });
             console.log('✓ PDF loaded successfully with standard options');
-          } catch (loadError) {
+          } catch {
             console.warn('Failed to load with standard options, trying createProxy...');
             try {
               // Create a fresh PDF and copy pages instead of modifying