fix(logger): use app.isPackaged for log dir detection and add logging docs

Previously getLogDir() only checked app.isReady(), which caused
development builds to write logs to the user data directory instead
of the local project logs/ folder. Now uses app.isPackaged to
correctly distinguish production from development environments.

Also adds comprehensive logging system documentation and a debug
utility for verifying Electron environment detection.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/tools/debug-env.ts

@@ -0,0 +1,27 @@
+/**
+ * Debug script to verify Electron environment detection
+ */
+import { app } from 'electron'
+
+console.log('=== Electron Environment Debug ===\n')
+
+console.log('1. app.isPackaged:', app.isPackaged)
+console.log('2. app.getPath("userData"):', app.getPath('userData'))
+console.log('3. app.getPath("logs"):', app.getPath('logs'))
+console.log('4. NODE_ENV:', process.env.NODE_ENV)
+console.log('5. process.cwd():', process.cwd())
+console.log('6. __dirname:', __dirname)
+
+// Predict log dir
+function getLogDir(): string {
+  if (app && app.isReady()) {
+    return app.getPath('logs')
+  }
+  const devLogDir = `${process.cwd()}\\logs`
+  return devLogDir
+}
+
+console.log('\n7. Predicted log dir:', getLogDir())
+console.log('\n=== END DEBUG ===')
+
+app.quit()