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)
+    }
+  }
 }
 
 /**

src/preload/api/logger.ts

@@ -20,6 +20,11 @@ function shouldLog(level: LogLevel): boolean {
   return (priorities[level] ?? 0) >= (priorities[cachedLevel] ?? 2)
 }
 
+// Listener for level change broadcasts from main process
+function onLevelChanged(_event: Electron.IpcRendererEvent, level: LogLevel): void {
+  cachedLevel = level
+}
+
 export const loggerApi = {
   log: (level: LogLevel, message: string, context?: Record<string, unknown>): void => {
     // Drop messages below the configured log level
@@ -34,10 +39,19 @@ export const loggerApi = {
   },
 
   /**
-   * Fetch the current log level from main process and cache it
-   * Should be called early in renderer initialization
+   * Fetch the current log level from main process and cache it.
+   * Also registers a listener for future level changes.
+   * Should be called early in renderer initialization.
    */
   fetchLevel: async (): Promise<void> => {
     cachedLevel = (await ipcRenderer.invoke(IPC_CHANNELS.LOGGER_GET_LEVEL)) as LogLevel
+    ipcRenderer.on(IPC_CHANNELS.LOGGER_LEVEL_CHANGED, onLevelChanged)
+  },
+
+  /**
+   * Remove the level change listener (call on cleanup/unmount)
+   */
+  cleanup: (): void => {
+    ipcRenderer.removeListener(IPC_CHANNELS.LOGGER_LEVEL_CHANGED, onLevelChanged)
   }
 } as const

src/shared/ipc-channels.ts

@@ -93,6 +93,7 @@ export const IPC_CHANNELS = {
   // Logger
   LOGGER_FORWARD: 'logger:forward',
   LOGGER_GET_LEVEL: 'logger:getLevel',
+  LOGGER_LEVEL_CHANGED: 'logger:levelChanged',
 
   // Report
   REPORT_LIST_ALL: 'report:listAll',