initial concept

src/preload/index.ts

@@ -0,0 +1,32 @@
+import { contextBridge, ipcRenderer } from 'electron'
+
+// Expose Electron API to renderer
+contextBridge.exposeInMainWorld('electronAPI', {
+  platform: process.platform,
+  minimize: () => ipcRenderer.send('window:minimize'),
+  close: () => ipcRenderer.send('window:close'),
+  toggleAlwaysOnTop: () => ipcRenderer.send('window:toggle-always-on-top'),
+  isAlwaysOnTop: () => ipcRenderer.invoke('window:is-always-on-top'),
+  getDesktopSources: () => ipcRenderer.invoke('audio:get-desktop-sources') as Promise<{ id: string; name: string }[]>,
+  expandSettings: (panelHeight: number) => ipcRenderer.send('window:expand-settings', panelHeight),
+  collapseSettings: (panelHeight: number) => ipcRenderer.send('window:collapse-settings', panelHeight),
+  onAlwaysOnTopChanged: (callback: (isOnTop: boolean) => void) => {
+    const handler = (_event: Electron.IpcRendererEvent, isOnTop: boolean): void => callback(isOnTop)
+    ipcRenderer.on('window:always-on-top-changed', handler)
+    return () => ipcRenderer.removeListener('window:always-on-top-changed', handler)
+  },
+})
+
+// Native DSP module — load if available, gracefully degrade if not
+let visualizerDSP: unknown = null
+try {
+  const isDev = process.env.NODE_ENV === 'development'
+  const modulePath = isDev
+    ? require('path').join(__dirname, '../../native/build/Release/visualizer_dsp.node')
+    : require('path').join(process.resourcesPath!, 'native/visualizer_dsp.node')
+  visualizerDSP = require(modulePath)
+} catch {
+  console.warn('Native DSP module not available — using JS fallback')
+}
+
+contextBridge.exposeInMainWorld('visualizerAPI', visualizerDSP)