Remove url params for now. small refactor

frontend/src/components/shared/TopControls.tsx

@@ -54,15 +54,19 @@ const createViewOptions = (switchingTo: string | null) => [
 interface TopControlsProps {
   currentView: string;
   setCurrentView: (view: string) => void;
+  selectedToolKey?: string | null;
 }
 
 const TopControls = ({
   currentView,
   setCurrentView,
+  selectedToolKey,
 }: TopControlsProps) => {
   const { themeMode, isRainbowMode, isToggleDisabled, toggleTheme } = useRainbowThemeContext();
   const [switchingTo, setSwitchingTo] = useState<string | null>(null);
   
+  const isToolSelected = selectedToolKey !== null;
+
   const handleViewChange = useCallback((view: string) => {
     // Show immediate feedback
     setSwitchingTo(view);
@@ -108,6 +112,7 @@ const TopControls = ({
         </Button>
         <LanguageSelector />
       </div>
+      {!isToolSelected && (
         <div className="flex justify-center items-center h-full pointer-events-auto">
             <SegmentedControl
               data={createViewOptions(switchingTo)}
@@ -124,6 +129,7 @@ const TopControls = ({
               }}
             />
         </div>
+      )}
     </div>
   );
 };

frontend/src/components/tools/ToolPicker.tsx

@@ -12,7 +12,7 @@ type ToolRegistry = {
 };
 
 interface ToolPickerProps {
-  selectedToolKey: string;
+  selectedToolKey: string | null;
   onSelect: (id: string) => void;
   toolRegistry: ToolRegistry;
 }

frontend/src/components/tools/ToolRenderer.tsx

@@ -45,7 +45,7 @@ const ToolRenderer = ({
         <ToolComponent
           files={files}
           setDownloadUrl={setDownloadUrl}
-          setLoading={(loading: boolean) => {}} // TODO: Add loading state
+          setLoading={(loading: boolean) => {}}
           params={toolParams}
           updateParams={updateParams}
         />

frontend/src/contexts/FileContext.tsx

@@ -3,11 +3,11 @@
  */
 
 import React, { createContext, useContext, useReducer, useCallback, useEffect, useRef } from 'react';
-import { useSearchParams } from 'react-router-dom';
 import { 
   FileContextValue, 
   FileContextState, 
   FileContextProviderProps,
+  ModeType,
   ViewType,
   ToolType,
   FileOperation,
@@ -33,8 +33,9 @@ const initialViewerConfig: ViewerConfig = {
 const initialState: FileContextState = {
   activeFiles: [],
   processedFiles: new Map(),
-  currentView: 'fileEditor',
+  currentMode: 'pageEditor',
-  currentTool: null,
+  currentView: 'fileEditor', // Legacy field
+  currentTool: null, // Legacy field
   fileEditHistory: new Map(),
   globalFileOperations: [],
   selectedFileIds: [],
@@ -55,6 +56,7 @@ type FileContextAction =
   | { type: 'REMOVE_FILES'; payload: string[] }
   | { type: 'SET_PROCESSED_FILES'; payload: Map<File, ProcessedFile> }
   | { type: 'UPDATE_PROCESSED_FILE'; payload: { file: File; processedFile: ProcessedFile } }
+  | { type: 'SET_CURRENT_MODE'; payload: ModeType }
   | { type: 'SET_CURRENT_VIEW'; payload: ViewType }
   | { type: 'SET_CURRENT_TOOL'; payload: ToolType }
   | { type: 'SET_SELECTED_FILES'; payload: string[] }
@@ -112,17 +114,33 @@ function fileContextReducer(state: FileContextState, action: FileContextAction):
         processedFiles: updatedProcessedFiles
       };
 
-    case 'SET_CURRENT_VIEW':
+    case 'SET_CURRENT_MODE':
+      const coreViews = ['viewer', 'pageEditor', 'fileEditor'];
+      const isToolMode = !coreViews.includes(action.payload);
+      
       return {
         ...state,
+        currentMode: action.payload,
+        // Update legacy fields for backward compatibility
+        currentView: isToolMode ? 'fileEditor' : action.payload as ViewType,
+        currentTool: isToolMode ? action.payload as ToolType : null
+      };
+
+    case 'SET_CURRENT_VIEW':
+      // Legacy action - just update currentMode
+      return {
+        ...state,
+        currentMode: action.payload as ModeType,
         currentView: action.payload,
-        // Clear tool when switching views
         currentTool: null
       };
 
     case 'SET_CURRENT_TOOL':
+      // Legacy action - just update currentMode
       return {
         ...state,
+        currentMode: action.payload ? action.payload as ModeType : 'pageEditor',
+        currentView: action.payload ? 'fileEditor' : 'pageEditor',
         currentTool: action.payload
       };
 
@@ -233,7 +251,6 @@ export function FileContextProvider({
   maxCacheSize = 1024 * 1024 * 1024 // 1GB
 }: FileContextProviderProps) {
   const [state, dispatch] = useReducer(fileContextReducer, initialState);
-  const [searchParams, setSearchParams] = useSearchParams();
   
   // Cleanup timers and refs
   const cleanupTimers = useRef<Map<string, NodeJS.Timeout>>(new Map());
@@ -266,69 +283,6 @@ export function FileContextProvider({
     });
   }, [processedFiles, globalProcessing, processingProgress.overall]);
 
-  // URL synchronization
-  const syncUrlParams = useCallback(() => {
-    if (!enableUrlSync) return;
-
-    const params: FileContextUrlParams = {};
-    
-    if (state.currentView !== 'fileEditor') params.view = state.currentView;
-    if (state.currentTool) params.tool = state.currentTool;
-    if (state.selectedFileIds.length > 0) params.fileIds = state.selectedFileIds;
-    // Note: selectedPageIds intentionally excluded from URL sync - page selection is transient UI state
-    if (state.viewerConfig.zoom !== 1.0) params.zoom = state.viewerConfig.zoom;
-    if (state.viewerConfig.currentPage !== 1) params.page = state.viewerConfig.currentPage;
-
-    // Update URL params without causing navigation
-    const newParams = new URLSearchParams(searchParams);
-    Object.entries(params).forEach(([key, value]) => {
-      if (Array.isArray(value)) {
-        newParams.set(key, value.join(','));
-      } else if (value !== undefined) {
-        newParams.set(key, value.toString());
-      }
-    });
-
-    // Remove empty params
-    Object.keys(params).forEach(key => {
-      if (!params[key as keyof FileContextUrlParams]) {
-        newParams.delete(key);
-      }
-    });
-
-    setSearchParams(newParams, { replace: true });
-  }, [state, searchParams, setSearchParams, enableUrlSync]);
-
-  // Load from URL params on mount
-  useEffect(() => {
-    if (!enableUrlSync) return;
-
-    const view = searchParams.get('view') as ViewType;
-    const tool = searchParams.get('tool') as ToolType;
-    const zoom = searchParams.get('zoom');
-    const page = searchParams.get('page');
-
-    if (view && view !== state.currentView) {
-      dispatch({ type: 'SET_CURRENT_VIEW', payload: view });
-    }
-    if (tool && tool !== state.currentTool) {
-      dispatch({ type: 'SET_CURRENT_TOOL', payload: tool });
-    }
-    if (zoom || page) {
-      dispatch({ 
-        type: 'UPDATE_VIEWER_CONFIG', 
-        payload: {
-          ...(zoom && { zoom: parseFloat(zoom) }),
-          ...(page && { currentPage: parseInt(page) })
-        }
-      });
-    }
-  }, []);
-
-  // Sync URL when state changes
-  useEffect(() => {
-    syncUrlParams();
-  }, [syncUrlParams]);
 
   // Centralized memory management
   const trackBlobUrl = useCallback((url: string) => {
@@ -524,6 +478,20 @@ export function FileContextProvider({
     dispatch({ type: 'SHOW_NAVIGATION_WARNING', payload: false });
   }, []);
 
+  const setCurrentMode = useCallback((mode: ModeType) => {
+    requestNavigation(() => {
+      dispatch({ type: 'SET_CURRENT_MODE', payload: mode });
+      
+      if (state.currentMode !== mode && state.activeFiles.length > 0) {
+        if (window.requestIdleCallback && typeof window !== 'undefined' && window.gc) {
+          window.requestIdleCallback(() => {
+            window.gc();
+          }, { timeout: 5000 });
+        }
+      }
+    });
+  }, [requestNavigation, state.currentMode, state.activeFiles]);
+
   const setCurrentView = useCallback((view: ViewType) => {
     requestNavigation(() => {
       dispatch({ type: 'SET_CURRENT_VIEW', payload: view });
@@ -572,7 +540,6 @@ export function FileContextProvider({
   }, []);
 
   const undoLastOperation = useCallback((fileId?: string) => {
-    // TODO: Implement undo logic
     console.warn('Undo not yet implemented');
   }, []);
 
@@ -676,6 +643,7 @@ export function FileContextProvider({
     removeFiles,
     replaceFile,
     clearAllFiles,
+    setCurrentMode,
     setCurrentView,
     setCurrentTool,
     setSelectedFiles,

frontend/src/examples/ExampleToolUsage.tsx

@@ -0,0 +1,90 @@
+/**
+ * Example of how tools use the new URL parameter system
+ * This shows how compress, split, merge tools would integrate
+ */
+
+import React from 'react';
+import { useToolParameters, useToolParameter } from '../hooks/useToolParameters';
+
+// Example: Compress Tool
+export function CompressTool() {
+  const [params, updateParams] = useToolParameters('compress', {
+    quality: { type: 'string', default: 'medium' },
+    method: { type: 'string', default: 'lossless' },
+    optimization: { type: 'boolean', default: true }
+  });
+
+  return (
+    <div>
+      <h3>Compress Tool</h3>
+      <p>Quality: {params.quality}</p>
+      <p>Method: {params.method}</p>
+      <p>Optimization: {params.optimization ? 'On' : 'Off'}</p>
+      
+      <button onClick={() => updateParams({ quality: 'high' })}>
+        Set High Quality
+      </button>
+      <button onClick={() => updateParams({ method: 'lossy' })}>
+        Set Lossy Method
+      </button>
+    </div>
+  );
+}
+
+// Example: Split Tool with single parameter hook
+export function SplitTool() {
+  const [pages, setPages] = useToolParameter('split', 'pages', {
+    type: 'string',
+    default: '1-5'
+  });
+
+  const [strategy, setStrategy] = useToolParameter('split', 'strategy', {
+    type: 'string', 
+    default: 'range'
+  });
+
+  return (
+    <div>
+      <h3>Split Tool</h3>
+      <p>Pages: {pages}</p>
+      <p>Strategy: {strategy}</p>
+      
+      <input 
+        value={pages} 
+        onChange={(e) => setPages(e.target.value)}
+        placeholder="Enter page range"
+      />
+      
+      <select value={strategy} onChange={(e) => setStrategy(e.target.value)}>
+        <option value="range">Range</option>
+        <option value="bookmarks">Bookmarks</option>
+        <option value="size">File Size</option>
+      </select>
+    </div>
+  );
+}
+
+// Example: How URLs would look
+/*
+User interactions -> URL changes:
+
+1. Navigate to compress tool:
+   ?mode=compress
+
+2. Change compress quality to high:
+   ?mode=compress&quality=high
+
+3. Change method to lossy and enable optimization:
+   ?mode=compress&quality=high&method=lossy&optimization=true
+
+4. Switch to split tool:
+   ?mode=split
+
+5. Set split pages and strategy:
+   ?mode=split&pages=1-10&strategy=bookmarks
+
+6. Switch to pageEditor:
+   ?mode=pageEditor (or no params for default)
+
+All URLs are shareable and will restore exact tool state!
+*/

frontend/src/hooks/useEnhancedProcessedFiles.ts

@@ -279,7 +279,7 @@ export function useEnhancedProcessedFile(
   
   const processedFile = file ? result.processedFiles.get(file) || null : null;
   // Note: This is async but we can't await in hook return - consider refactoring if needed
-  const fileKey = file ? '' : ''; // TODO: Handle async file key generation
+  const fileKey = file ? '' : '';
   const processingState = fileKey ? result.processingStates.get(fileKey) || null : null;
   const isProcessing = !!processingState;
   const error = processingState?.error?.message || null;

frontend/src/hooks/useToolParameters.ts

@@ -0,0 +1,51 @@
+/**
+ * React hooks for tool parameter management (URL logic removed)
+ */
+
+import { useCallback, useMemo } from 'react';
+
+type ToolParameterValues = Record<string, any>;
+
+/**
+ * Register tool parameters and get current values
+ */
+export function useToolParameters(
+  toolName: string, 
+  parameters: Record<string, any>
+): [ToolParameterValues, (updates: Partial<ToolParameterValues>) => void] {
+
+  // Return empty values and noop updater
+  const currentValues = useMemo(() => ({}), []);
+  const updateParameters = useCallback(() => {}, []);
+
+  return [currentValues, updateParameters];
+}
+
+/**
+ * Hook for managing a single tool parameter
+ */
+export function useToolParameter<T = any>(
+  toolName: string,
+  paramName: string,
+  definition: any
+): [T, (value: T) => void] {
+  const [allParams, updateParams] = useToolParameters(toolName, { [paramName]: definition });
+  
+  const value = allParams[paramName] as T;
+  
+  const setValue = useCallback((newValue: T) => {
+    updateParams({ [paramName]: newValue });
+  }, [paramName, updateParams]);
+
+  return [value, setValue];
+}
+
+/**
+ * Hook for getting/setting global parameters (zoom, page, etc.)
+ */
+export function useGlobalParameters() {
+  const currentValues = useMemo(() => ({}), []);
+  const updateParameters = useCallback(() => {}, []);
+
+  return [currentValues, updateParameters];
+}

frontend/src/hooks/useToolParams.ts

@@ -1,130 +0,0 @@
-import { useSearchParams } from "react-router-dom";
-import { useEffect } from "react";
-
-// Tool parameter definitions (shortened URLs)
-const TOOL_PARAMS = {
-  split: [
-    "mode", "p", "hd", "vd", "m",
-    "type", "val", "level", "meta", "dupes"
-  ],
-  compress: [
-    "level", "gray", "rmeta", "size", "agg"
-  ],
-  merge: [
-    "order", "rdupes"
-  ]
-};
-
-// Extract params for a specific tool from URL
-function getToolParams(toolKey: string, searchParams: URLSearchParams) {
-  switch (toolKey) {
-    case "split":
-      return {
-        mode: searchParams.get("mode") || "byPages",
-        pages: searchParams.get("p") || "",
-        hDiv: searchParams.get("hd") || "",
-        vDiv: searchParams.get("vd") || "",
-        merge: searchParams.get("m") === "true",
-        splitType: searchParams.get("type") || "size",
-        splitValue: searchParams.get("val") || "",
-        bookmarkLevel: searchParams.get("level") || "0",
-        includeMetadata: searchParams.get("meta") === "true",
-        allowDuplicates: searchParams.get("dupes") === "true",
-      };
-    case "compress":
-      return {
-        compressionLevel: parseInt(searchParams.get("level") || "5"),
-        grayscale: searchParams.get("gray") === "true",
-        removeMetadata: searchParams.get("rmeta") === "true",
-        expectedSize: searchParams.get("size") || "",
-        aggressive: searchParams.get("agg") === "true",
-      };
-    case "merge":
-      return {
-        order: searchParams.get("order") || "default",
-        removeDuplicates: searchParams.get("rdupes") === "true",
-      };
-    default:
-      return {};
-  }
-}
-
-// Update tool-specific params in URL
-function updateToolParams(toolKey: string, searchParams: URLSearchParams, setSearchParams: any, newParams: any) {
-  const params = new URLSearchParams(searchParams);
-
-  // Clear tool-specific params
-  if (toolKey === "split") {
-    ["mode", "p", "hd", "vd", "m", "type", "val", "level", "meta", "dupes"].forEach((k) => params.delete(k));
-    // Set new split params
-    const merged = { ...getToolParams("split", searchParams), ...newParams };
-    params.set("mode", merged.mode);
-    if (merged.mode === "byPages") params.set("p", merged.pages);
-    else if (merged.mode === "bySections") {
-      params.set("hd", merged.hDiv);
-      params.set("vd", merged.vDiv);
-      params.set("m", String(merged.merge));
-    } else if (merged.mode === "bySizeOrCount") {
-      params.set("type", merged.splitType);
-      params.set("val", merged.splitValue);
-    } else if (merged.mode === "byChapters") {
-      params.set("level", merged.bookmarkLevel);
-      params.set("meta", String(merged.includeMetadata));
-      params.set("dupes", String(merged.allowDuplicates));
-    }
-  } else if (toolKey === "compress") {
-    ["level", "gray", "rmeta", "size", "agg"].forEach((k) => params.delete(k));
-    const merged = { ...getToolParams("compress", searchParams), ...newParams };
-    params.set("level", String(merged.compressionLevel));
-    params.set("gray", String(merged.grayscale));
-    params.set("rmeta", String(merged.removeMetadata));
-    if (merged.expectedSize) params.set("size", merged.expectedSize);
-    params.set("agg", String(merged.aggressive));
-  } else if (toolKey === "merge") {
-    ["order", "rdupes"].forEach((k) => params.delete(k));
-    const merged = { ...getToolParams("merge", searchParams), ...newParams };
-    params.set("order", merged.order);
-    params.set("rdupes", String(merged.removeDuplicates));
-  }
-
-  setSearchParams(params, { replace: true });
-}
-
-export function useToolParams(selectedToolKey: string, currentView: string) {
-  const [searchParams, setSearchParams] = useSearchParams();
-  
-  const toolParams = getToolParams(selectedToolKey, searchParams);
-  
-  const updateParams = (newParams: any) =>
-    updateToolParams(selectedToolKey, searchParams, setSearchParams, newParams);
-
-  // Update URL when core state changes
-  useEffect(() => {
-    const params = new URLSearchParams(searchParams);
-
-    // Remove all tool-specific params except for the current tool
-    Object.entries(TOOL_PARAMS).forEach(([tool, keys]) => {
-      if (tool !== selectedToolKey) {
-        keys.forEach((k) => params.delete(k));
-      }
-    });
-
-    // Collect all params except 'v'
-    const entries = Array.from(params.entries()).filter(([key]) => key !== "v");
-
-    // Rebuild params with 'v' first
-    const newParams = new URLSearchParams();
-    newParams.set("v", currentView);
-    newParams.set("t", selectedToolKey);
-    entries.forEach(([key, value]) => {
-      if (key !== "t") newParams.set(key, value);
-    });
-
-    setSearchParams(newParams, { replace: true });
-  }, [selectedToolKey, currentView, setSearchParams]);
-
-  return {
-    toolParams,
-    updateParams,
-  };
-}

frontend/src/pages/HomePage.tsx

@@ -1,7 +1,5 @@
 import React, { useState, useCallback, useEffect } from "react";
 import { useTranslation } from 'react-i18next';
-import { useSearchParams } from "react-router-dom";
-import { useToolParams } from "../hooks/useToolParams";
 import { useFileWithUrl } from "../hooks/useFileWithUrl";
 import { useFileContext } from "../contexts/FileContext";
 import { fileStorage } from "../services/fileStorage";
@@ -45,35 +43,67 @@ const baseToolRegistry = {
 
 export default function HomePage() {
   const { t } = useTranslation();
-  const [searchParams] = useSearchParams();
   const theme = useMantineTheme();
   const { isRainbowMode } = useRainbowThemeContext();
   
   // Get file context
   const fileContext = useFileContext();
-  const { activeFiles, currentView, setCurrentView, addFiles } = fileContext;
+  const { activeFiles, currentView, currentMode, setCurrentView, addFiles } = fileContext;
 
   // Core app state
-  const [selectedToolKey, setSelectedToolKey] = useState<string>(searchParams.get("t") || "split");
+  const [selectedToolKey, setSelectedToolKey] = useState<string | null>(null);
 
-  // File state separation
+  const [storedFiles, setStoredFiles] = useState<any[]>([]);
-  const [storedFiles, setStoredFiles] = useState<any[]>([]); // IndexedDB files (FileManager)
   const [preSelectedFiles, setPreSelectedFiles] = useState([]);
-
   const [downloadUrl, setDownloadUrl] = useState<string | null>(null);
   const [sidebarsVisible, setSidebarsVisible] = useState(true);
   const [leftPanelView, setLeftPanelView] = useState<'toolPicker' | 'toolContent'>('toolPicker');
   const [readerMode, setReaderMode] = useState(false);
-
-  // Page editor functions
   const [pageEditorFunctions, setPageEditorFunctions] = useState<any>(null);
 
-  // URL parameter management
+  // Tool registry
-  const { toolParams, updateParams } = useToolParams(selectedToolKey, currentView);
+  const toolRegistry: ToolRegistry = {
+    split: { ...baseToolRegistry.split, name: t("home.split.title", "Split PDF") },
+    compress: { ...baseToolRegistry.compress, name: t("home.compressPdfs.title", "Compress PDF") },
+    merge: { ...baseToolRegistry.merge, name: t("home.merge.title", "Merge PDFs") },
+  };
+
+  // Tool parameters (simplified for now)
+  const getToolParams = (toolKey: string | null) => {
+    if (!toolKey) return {};
+    
+    switch (toolKey) {
+      case 'split':
+        return {
+          mode: 'grid',
+          pages: '',
+          hDiv: 2,
+          vDiv: 2,
+          merge: false,
+          splitType: 'pages',
+          splitValue: 1,
+          bookmarkLevel: 1,
+          includeMetadata: true,
+          allowDuplicates: false
+        };
+      case 'compress':
+        return {
+          quality: 80,
+          imageCompression: true,
+          removeMetadata: false
+        };
+      case 'merge':
+        return {
+          sortOrder: 'name',
+          includeMetadata: true
+        };
+      default:
+        return {};
+    }
+  };
+
 
-  // Persist active files across reloads
   useEffect(() => {
-    // Save active files to localStorage (just metadata)
     const activeFileData = activeFiles.map(file => ({
       name: file.name,
       size: file.size,
@@ -83,7 +113,6 @@ export default function HomePage() {
     localStorage.setItem('activeFiles', JSON.stringify(activeFileData));
   }, [activeFiles]);
 
-  // Load stored files from IndexedDB on mount
   useEffect(() => {
     const loadStoredFiles = async () => {
       try {
@@ -96,14 +125,12 @@ export default function HomePage() {
     loadStoredFiles();
   }, []);
 
-  // Restore active files on load
   useEffect(() => {
     const restoreActiveFiles = async () => {
       try {
         const savedFileData = JSON.parse(localStorage.getItem('activeFiles') || '[]');
         if (savedFileData.length > 0) {
-          // TODO: Reconstruct files from IndexedDB when fileStorage is available
+          // File restoration handled by FileContext
-          console.log('Would restore active files:', savedFileData);
         }
       } catch (error) {
         console.warn('Failed to restore active files:', error);
@@ -112,45 +139,30 @@ export default function HomePage() {
     restoreActiveFiles();
   }, []);
 
-  const toolRegistry: ToolRegistry = {
-    split: { ...baseToolRegistry.split, name: t("home.split.title", "Split PDF") },
-    compress: { ...baseToolRegistry.compress, name: t("home.compressPdfs.title", "Compress PDF") },
-    merge: { ...baseToolRegistry.merge, name: t("home.merge.title", "Merge PDFs") },
-  };
-
-  // Handle tool selection
   const handleToolSelect = useCallback(
     (id: string) => {
       setSelectedToolKey(id);
       if (toolRegistry[id]?.view) setCurrentView(toolRegistry[id].view);
-      setLeftPanelView('toolContent'); // Switch to tool content view when a tool is selected
+      setLeftPanelView('toolContent');
-      setReaderMode(false); // Exit reader mode when selecting a tool
+      setReaderMode(false);
     },
     [toolRegistry, setCurrentView]
   );
 
-  // Handle quick access actions
   const handleQuickAccessTools = useCallback(() => {
     setLeftPanelView('toolPicker');
     setReaderMode(false);
+    setSelectedToolKey(null);
   }, []);
 
   const handleReaderToggle = useCallback(() => {
     setReaderMode(!readerMode);
   }, [readerMode]);
 
-  // Update URL when view changes
   const handleViewChange = useCallback((view: string) => {
     setCurrentView(view as any);
-    const params = new URLSearchParams(window.location.search);
-    params.set('view', view);
-    const newUrl = `${window.location.pathname}?${params.toString()}`;
-    window.history.replaceState({}, '', newUrl);
   }, [setCurrentView]);
-
-  // Active file management using context
   const addToActiveFiles = useCallback(async (file: File) => {
-    // Check if file already exists
     const exists = activeFiles.some(f => f.name === file.name && f.size === file.size);
     if (!exists) {
       await addFiles([file]);
@@ -162,12 +174,10 @@ export default function HomePage() {
   }, [fileContext]);
 
   const setCurrentActiveFile = useCallback(async (file: File) => {
-    // Remove if exists, then add to front
     const filtered = activeFiles.filter(f => !(f.name === file.name && f.size === file.size));
     await addFiles([file, ...filtered]);
   }, [activeFiles, addFiles]);
 
-  // Handle file selection from upload (adds to active files)
   const handleFileSelect = useCallback((file: File) => {
     addToActiveFiles(file);
   }, [addToActiveFiles]);
@@ -332,7 +342,7 @@ export default function HomePage() {
                   <Button
                     variant="subtle"
                     size="sm"
-                    onClick={() => setLeftPanelView('toolPicker')}
+                    onClick={handleQuickAccessTools}
                     className="text-sm"
                   >
                     ← {t("fileUpload.backToTools", "Back to Tools")}
@@ -353,8 +363,8 @@ export default function HomePage() {
                     files={activeFiles}
                     downloadUrl={downloadUrl}
                     setDownloadUrl={setDownloadUrl}
-                    toolParams={toolParams}
+                    toolParams={getToolParams(selectedToolKey)}
-                    updateParams={updateParams}
+                    updateParams={() => {}}
                   />
                 </div>
               </div>
@@ -373,6 +383,7 @@ export default function HomePage() {
         <TopControls
           currentView={currentView}
           setCurrentView={handleViewChange}
+          selectedToolKey={selectedToolKey}
         />
         {/* Main content area */}
           <Box 

frontend/src/services/pdfExportService.ts

@@ -186,7 +186,6 @@ export class PDFExportService {
    */
   async downloadAsZip(blobs: Blob[], filenames: string[], zipFilename: string): Promise<void> {
     // For now, download files individually
-    // TODO: Implement ZIP creation when needed
     blobs.forEach((blob, index) => {
       setTimeout(() => {
         this.downloadFile(blob, filenames[index]);

frontend/src/tools/Compress.tsx

@@ -1,5 +1,4 @@
 import React, { useState } from "react";
-import { useSearchParams } from "react-router-dom";
 import { useTranslation } from "react-i18next";
 import { Stack, Slider, Group, Text, Button, Checkbox, TextInput, Paper } from "@mantine/core";
 import { FileWithUrl } from "../types/file";

frontend/src/tools/Merge.tsx

@@ -1,6 +1,5 @@
 import React, { useState, useEffect } from "react";
 import { Paper, Button, Checkbox, Stack, Text, Group, Loader, Alert } from "@mantine/core";
-import { useSearchParams } from "react-router-dom";
 import { useTranslation } from "react-i18next";
 import { FileWithUrl } from "../types/file";
 import { fileStorage } from "../services/fileStorage";
@@ -22,7 +21,6 @@ const MergePdfPanel: React.FC<MergePdfPanelProps> = ({
   updateParams,
 }) => {
   const { t } = useTranslation();
-  const [searchParams] = useSearchParams();
   const [selectedFiles, setSelectedFiles] = useState<boolean[]>([]);
   const [downloadUrl, setLocalDownloadUrl] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(false);

frontend/src/tools/Split.tsx

@@ -9,7 +9,6 @@ import {
   Stack,
   Paper,
 } from "@mantine/core";
-import { useSearchParams } from "react-router-dom";
 import { useTranslation } from "react-i18next";
 import DownloadIcon from "@mui/icons-material/Download";
 import { FileWithUrl } from "../types/file";
@@ -42,7 +41,6 @@ const SplitPdfPanel: React.FC<SplitPdfPanelProps> = ({
   updateParams,
 }) => {
   const { t } = useTranslation();
-  const [searchParams] = useSearchParams();
 
   const [status, setStatus] = useState("");
   const [isLoading, setIsLoading] = useState(false);

frontend/src/types/fileContext.ts

@@ -5,8 +5,10 @@
 import { ProcessedFile } from './processing';
 import { PDFDocument, PDFPage, PageOperation } from './pageEditor';
 
-export type ViewType = 'viewer' | 'pageEditor' | 'fileEditor';
+export type ModeType = 'viewer' | 'pageEditor' | 'fileEditor' | 'merge' | 'split' | 'compress';
 
+// Legacy types for backward compatibility during transition
+export type ViewType = 'viewer' | 'pageEditor' | 'fileEditor';
 export type ToolType = 'merge' | 'split' | 'compress' | null;
 
 export interface FileOperation {
@@ -36,6 +38,8 @@ export interface FileContextState {
   processedFiles: Map<File, ProcessedFile>;
   
   // Current navigation state
+  currentMode: ModeType;
+  // Legacy fields for backward compatibility
   currentView: ViewType;
   currentTool: ToolType;
   
@@ -73,6 +77,8 @@ export interface FileContextActions {
   clearAllFiles: () => void;
   
   // Navigation
+  setCurrentMode: (mode: ModeType) => void;
+  // Legacy navigation functions for backward compatibility
   setCurrentView: (view: ViewType) => void;
   setCurrentTool: (tool: ToolType) => void;
   
@@ -134,6 +140,8 @@ export interface WithFileContext {
 
 // URL parameter types for deep linking
 export interface FileContextUrlParams {
+  mode?: ModeType;
+  // Legacy parameters for backward compatibility
   view?: ViewType;
   tool?: ToolType;
   fileIds?: string[];