feat(logger): sync renderer log level cache and support verbose IPC

- Add LOGGER_LEVEL_CHANGED IPC channel for broadcasting level changes
- setLogLevel() now notifies all BrowserWindows when level changes
- Add verbose case in IPC forwardToWinston (was falling through to info)
- Renderer logger API listens for level changes and updates cached level
- Add cleanup() method to remove level change listener

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

src/main/ipc/logger-handler.ts

@@ -9,7 +9,7 @@
  * - Error-level logs bypass circuit breaker
  */
 
-import { ipcMain } from 'electron'
+import { ipcMain, BrowserWindow } from 'electron'
 import winston from 'winston'
 import { createLogger } from '../services/logger'
 import logger from '../services/logger'
@@ -161,6 +161,9 @@ class LoggerHandlerState {
       : entry.message
 
     switch (entry.level) {
+      case 'verbose':
+        childLogger.verbose(message, entry.context)
+        break
       case 'debug':
         childLogger.debug(message, entry.context)
         break

src/main/services/logger/index.ts

@@ -11,8 +11,10 @@
 import winston from 'winston'
 import DailyRotateFile from 'winston-daily-rotate-file'
 import path from 'path'
+import { BrowserWindow } from 'electron'
 import { serializeError, sanitizeError } from './error-utils'
 import { getLogDir, isProduction } from './shared'
+import { IPC_CHANNELS } from '../../../shared/ipc-channels'
 
 // Cache isProduction() at module load — app.isPackaged never changes at runtime
 const IS_PROD = isProduction()
@@ -113,11 +115,18 @@ const logger = winston.createLogger({
 })
 
 /**
- * Update the logger level dynamically
+ * Update the logger level dynamically and notify renderer processes
  * @param level - The new log level
  */
 export function setLogLevel(level: string): void {
   logger.level = level
+
+  // Broadcast level change to all renderer windows so they update their cached level
+  for (const win of BrowserWindow.getAllWindows()) {
+    if (!win.isDestroyed()) {
+      win.webContents.send(IPC_CHANNELS.LOGGER_LEVEL_CHANGED, level)
+    }
+  }
 }
 
 /**