Initial commit: Sarthi Lab desktop application

electron/preload.js

@@ -0,0 +1,34 @@
+const { contextBridge, ipcRenderer } = require('electron');
+
+contextBridge.exposeInMainWorld('electronAPI', {
+  // Platform info (synchronous — available immediately without IPC)
+  platform: process.platform,
+  arch: process.arch,
+  // Persistent config (server URL, session token)
+  config: {
+    get: (key) => ipcRenderer.invoke('config:get', key),
+    set: (key, value) => ipcRenderer.invoke('config:set', key, value),
+    delete: (key) => ipcRenderer.invoke('config:delete', key),
+  },
+  // Text-to-speech via Piper
+  tts: {
+    speak: (text) => ipcRenderer.invoke('tts:speak', text),
+    stop: () => ipcRenderer.invoke('tts:stop'),
+  },
+  // Speech-to-text via whisper.cpp
+  stt: {
+    transcribe: (audioBase64) => ipcRenderer.invoke('stt:transcribe', audioBase64),
+  },
+  // Model downloads
+  download: {
+    start: (type) => ipcRenderer.invoke('download:start', type),
+    check: (type) => ipcRenderer.invoke('download:check', type),
+    status: () => ipcRenderer.invoke('download:status'),
+    onProgress: (callback) => {
+      const listener = (_, data) => callback(data);
+      ipcRenderer.on('download:progress', listener);
+      // Returns a cleanup function so callers can remove the listener
+      return () => ipcRenderer.removeListener('download:progress', listener);
+    },
+  },
+});