feat(writer): inline scene management and reliable export downloads

Author: prplx

electron/main.ts

@@ -1,6 +1,7 @@
 import { app, BrowserWindow, ipcMain, dialog } from "electron";
 import path from "path";
 import { existsSync } from "fs";
+import { writeFile } from "fs/promises";
 import { pathToFileURL } from "url";
 
 const isDev = !app.isPackaged;
@@ -213,6 +214,29 @@ ipcMain.handle("window:getPlatform", () => {
   return process.platform;
 });
 
+ipcMain.handle("file:save", async (_event, payload: { filename?: unknown; base64Data?: unknown }) => {
+  if (!payload || typeof payload !== "object") {
+    return { ok: false, canceled: true };
+  }
+  const filename = String(payload.filename || "export.txt").trim() || "export.txt";
+  const base64Data = String(payload.base64Data || "").trim();
+  if (!base64Data) {
+    throw new Error("Missing file payload");
+  }
+
+  const result = await dialog.showSaveDialog(mainWindow ?? undefined, {
+    defaultPath: filename,
+    buttonLabel: "Save"
+  });
+  if (result.canceled || !result.filePath) {
+    return { ok: false, canceled: true };
+  }
+
+  const buffer = Buffer.from(base64Data, "base64");
+  await writeFile(result.filePath, buffer);
+  return { ok: true, canceled: false, filePath: result.filePath };
+});
+
 app.on("second-instance", () => {
   if (mainWindow) {
     if (mainWindow.isMinimized()) mainWindow.restore();

electron/preload.ts

@@ -6,6 +6,7 @@ contextBridge.exposeInMainWorld("electronAPI", {
   close: () => ipcRenderer.invoke("window:close"),
   isMaximized: () => ipcRenderer.invoke("window:isMaximized"),
   getPlatform: () => ipcRenderer.invoke("window:getPlatform"),
+  saveFile: (filename: string, base64Data: string) => ipcRenderer.invoke("file:save", { filename, base64Data }),
   onMaximizedChange: (callback: (maximized: boolean) => void) => {
     ipcRenderer.on("window:maximized", (_event, maximized: boolean) => {
       callback(maximized);

package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "vellium",
   "private": true,
-  "version": "0.3.1",
+  "version": "0.3.5",
   "type": "module",
   "main": "dist-electron/main.cjs",
   "scripts": {
@@ -28,6 +28,7 @@
     "better-sqlite3": "^12.6.2",
     "clsx": "^2.1.1",
     "cors": "^2.8.5",
+    "docx": "^9.5.3",
     "express": "^4.21.0",
     "mammoth": "^1.11.0",
     "marked": "^17.0.3",