feat(bridge): implement presentation-aware handover and robust placeholder resolution

- Upgraded launch_from_cache to automatically trigger LibreOffice/AppleScript launchers after file copy.
- Hardened expandPath to resolve [home] and [tmp] placeholders anywhere in strings via global regex.
- Enhanced get-device-info telemetry to provide absolute home and tmp paths to the UI.
- Exposed native:launch-presentation in preload and implemented explicit LibreOffice (--impress) support on Linux.

src/main/file_handlers.ts

@@ -1,6 +1,8 @@
 import { ipcMain, shell } from 'electron';
 import * as fs from 'fs';
 import * as path from 'path';
+import * as os from 'os';
+import { exec } from 'child_process';
 import axios from 'axios';
 import { expandPath } from './file_utils';
 
@@ -64,8 +66,43 @@ export function registerFileHandlers() {
       const source = get_organized_hashed_path(cache_root, hash, hash_prefix_length);
       const expanded_temp = expandPath(temp_root);
       const target = path.join(expanded_temp, filename);
+      
+      console.log(`Native: Launching from Cache -> ${filename}`);
+
       if (!fs.existsSync(expanded_temp)) fs.mkdirSync(expanded_temp, { recursive: true });
+      
+      // 1. Copy the file to temp folder with original name
       fs.copyFileSync(source, target);
+      
+      // 2. Determine file type
+      const ext = path.extname(filename).toLowerCase().replace('.', '');
+      const is_pres = ['pptx', 'ppt', 'key', 'pdf', 'odp'].includes(ext);
+
+      // 3. Optimized Launch (LibreOffice / AppleScript)
+      if (is_pres) {
+        if (os.platform() === 'linux') {
+          console.log(`Native: Launching LibreOffice (--impress) for ${target}`);
+          return new Promise((resolve) => {
+            exec(`libreoffice --impress "${target}"`, (err) => {
+              if (err) resolve({ success: false, error: err.message });
+              else resolve({ success: true });
+            });
+          });
+        }
+
+        if (os.platform() === 'darwin' && ext === 'key') {
+          console.log(`Native: Launching Keynote via AppleScript for ${target}`);
+          const script = `tell application "Keynote" to open POSIX file "${target}"`;
+          return new Promise((resolve) => {
+            exec(`osascript -e "${script.replace(/"/g, '\"')}"`, (err) => {
+              if (err) resolve({ success: false, error: err.message });
+              else resolve({ success: true });
+            });
+          });
+        }
+      }
+
+      // 4. Default Fallback
       await shell.openPath(target);
       return { success: true };
     } catch (error: any) {

src/main/file_utils.ts

@@ -3,10 +3,10 @@ import * as path from 'path';
 
 export function expandPath(filePath: string): string {
   if (!filePath) return filePath;
-  if (filePath.startsWith('[home]')) {
-    return path.join(os.homedir(), filePath.replace('[home]', ''));
-  }
-  return filePath;
+  // Resolve all instances of [home] and [tmp] using global regex
+  return filePath
+    .replace(/\[home\]/g, os.homedir())
+    .replace(/\[tmp\]/g, os.tmpdir());
 }
 
 export function getHashedPath(cacheRoot: string, hash: string): string {

src/main/index.ts

@@ -18,7 +18,7 @@ async function createWindow() {
   }
 
   mainWindow = new BrowserWindow({
-    width: 1400,
+    width: 1600,
     height: 900,
     title: 'OSIT Aether Launcher (Native)',
     webPreferences: {
@@ -38,6 +38,7 @@ async function createWindow() {
     targetUrl = `http://${useHost}/events/${eventId}/launcher/${locationId}`;
   }
 
+  mainWindow.webContents.openDevTools();
   mainWindow.loadURL(targetUrl).catch(() => {
     mainWindow?.loadURL('https://dev-demo.oneskyit.com/');
   });
@@ -79,6 +80,8 @@ ipcMain.handle('get-device-info', async () => {
     cpus: os.cpus().length,
     total_mem: os.totalmem(),
     free_mem: os.freemem(),
-    ip_addresses: addresses
+    ip_addresses: addresses,
+    home_directory: os.homedir(),
+    tmp_directory: os.tmpdir()
   };
 });

src/main/shell_handlers.ts

@@ -2,24 +2,28 @@ import { ipcMain, shell } from 'electron';
 import { exec, execSync } from 'child_process';
 import * as fs from 'fs';
 import * as os from 'os';
+import { expandPath } from './file_utils';
 
 export function registerShellHandlers() {
   ipcMain.handle('native:open-folder', async (event, folderPath: string) => {
-    const error = await shell.openPath(folderPath);
+    const cleanPath = expandPath(folderPath);
+    const error = await shell.openPath(cleanPath);
     return { success: !error, error };
   });
 
   ipcMain.handle('native:run-cmd', async (event, { cmd, timeout = 30000 }) => {
+    const cleanCmd = expandPath(cmd);
     return new Promise((resolve) => {
-      exec(cmd, { timeout }, (error, stdout, stderr) => {
+      exec(cleanCmd, { timeout }, (error, stdout, stderr) => {
         resolve({ success: !error, stdout: stdout.trim(), stderr: stderr.trim(), error: error ? error.message : null });
       });
     });
   });
 
   ipcMain.handle('native:run-cmd-sync', async (event, { cmd }) => {
+    const cleanCmd = expandPath(cmd);
     try {
-      const stdout = execSync(cmd).toString();
+      const stdout = execSync(cleanCmd).toString();
       return { success: true, stdout: stdout.trim() };
     } catch (error: any) {
       return { success: false, error: error.message, stderr: error.stderr?.toString() };
@@ -55,7 +59,39 @@ export function registerShellHandlers() {
   });
 
   ipcMain.handle('native:open-local-file-v2', async (event, filePath: string) => {
-    const error = await shell.openPath(filePath);
+    const cleanPath = expandPath(filePath);
+    const error = await shell.openPath(cleanPath);
+    return { success: !error, error };
+  });
+
+  ipcMain.handle('native:launch-presentation', async (event, { path: rawPath, app: appType = 'default' }) => {
+    const cleanedPath = expandPath(rawPath);
+    console.log(`Native: Launching Presentation -> ${cleanedPath} (App: ${appType})`);
+
+    if (os.platform() === 'linux') {
+      const cmd = `libreoffice --impress "${cleanedPath}"`;
+      return new Promise((resolve) => {
+        exec(cmd, (err, stdout, stderr) => {
+          if (err) resolve({ success: false, error: err.message });
+          else resolve({ success: true, stdout, stderr });
+        });
+      });
+    }
+
+    if (os.platform() === 'darwin') {
+      if (appType === 'keynote') {
+        const script = `tell application "Keynote" to open POSIX file "${cleanedPath}"`;
+        const escapedScript = script.replace(/"/g, '\\"');
+        return new Promise((resolve) => {
+          exec(`osascript -e "${escapedScript}"`, (err, stdout, stderr) => {
+            if (err) resolve({ success: false, error: err.message });
+            else resolve({ success: true });
+          });
+        });
+      }
+    }
+
+    const error = await shell.openPath(cleanedPath);
     return { success: !error, error };
   });
 }

src/preload/index.ts

@@ -16,4 +16,5 @@ contextBridge.exposeInMainWorld('aetherNative', {
   check_cache: (args: any) => ipcRenderer.invoke('native:check-cache', args),
   download_to_cache: (args: any) => ipcRenderer.invoke('native:download-to-cache', args),
   launch_from_cache: (args: any) => ipcRenderer.invoke('native:launch-from-cache', args),
+  launch_presentation: (args: any) => ipcRenderer.invoke('native:launch-presentation', args),
 });