feat: Add .env.example configuration file and integrate Redis service into Docker Compose for improved task management. Update desktop application to support document indexing and extraction workflows, enhancing user experience with a new extraction wizard and stepper components. Revise README and documentation for clarity on setup and usage.

services/desktop_app/electron/main.cjs

@@ -1,6 +1,7 @@
 const { app, BrowserWindow, dialog, ipcMain } = require("electron");
 const fs = require("node:fs/promises");
 const path = require("node:path");
+const { indexFolder } = require("./folderIndex.cjs");
 
 const DOCUMENT_EXTENSIONS = new Set([".pdf", ".tif", ".tiff", ".png", ".jpg", ".jpeg"]);
 
@@ -72,6 +73,20 @@ ipcMain.handle("fs:first-document", async (_event, rootPath, keywords) => {
   return matches[0] || null;
 });
 
+ipcMain.handle("fs:index-folder", async (_event, rootPath, structureMode, docTypes, keywords) => {
+  if (!rootPath) return [];
+  return indexFolder(rootPath, structureMode, Array.isArray(docTypes) ? docTypes : [], Array.isArray(keywords) ? keywords : []);
+});
+
+ipcMain.handle("fs:read-file", async (_event, filePath) => {
+  const buffer = await fs.readFile(filePath);
+  return {
+    filename: path.basename(filePath),
+    size: buffer.byteLength,
+    data: buffer,
+  };
+});
+
 async function findDocuments(rootPath, keywords) {
   const normalizedKeywords = keywords
     .map((item) => String(item || "").trim().toLowerCase())