diff --git a/electron/main.ts b/electron/main.ts
index 46b96a9..31e2d34 100644
--- a/electron/main.ts
+++ b/electron/main.ts
@@ -972,6 +972,17 @@ function registerIpcHandlers() {
     }
   })
 
+  ipcMain.handle('log:clear', async () => {
+    try {
+      const logPath = join(app.getPath('userData'), 'logs', 'wcdb.log')
+      await mkdir(dirname(logPath), { recursive: true })
+      await writeFile(logPath, '', 'utf8')
+      return { success: true }
+    } catch (e) {
+      return { success: false, error: String(e) }
+    }
+  })
+
   ipcMain.handle('diagnostics:getExportCardLogs', async (_, options?: { limit?: number }) => {
     return exportCardDiagnosticsService.snapshot(options?.limit)
   })
diff --git a/electron/preload.ts b/electron/preload.ts
index 2f2874c..2dcc561 100644
--- a/electron/preload.ts
+++ b/electron/preload.ts
@@ -70,6 +70,7 @@ contextBridge.exposeInMainWorld('electronAPI', {
   log: {
     getPath: () => ipcRenderer.invoke('log:getPath'),
     read: () => ipcRenderer.invoke('log:read'),
+    clear: () => ipcRenderer.invoke('log:clear'),
     debug: (data: any) => ipcRenderer.send('log:debug', data)
   },
 
diff --git a/electron/services/chatService.ts b/electron/services/chatService.ts
index 3a6741a..0b81fe2 100644
--- a/electron/services/chatService.ts
+++ b/electron/services/chatService.ts
@@ -359,16 +359,15 @@ class ChatService {
     // 这种方式更高效，且不占用 JS 线程，并能直接监听 session/message 目录变更
     wcdbService.setMonitor((type, json) => {
       this.handleSessionStatsMonitorChange(type, json)
+      const windows = BrowserWindow.getAllWindows()
       // 广播给所有渲染进程窗口
-      BrowserWindow.getAllWindows().forEach((win) => {
+      windows.forEach((win) => {
         if (!win.isDestroyed()) {
           win.webContents.send('wcdb-change', { type, json })
         }
       })
     })
   }
-    })
-  }
 
   /**
    * 预热 media 数据库列表缓存（后台异步执行）
diff --git a/electron/services/wcdbCore.ts b/electron/services/wcdbCore.ts
index c118a79..a56cf78 100644
--- a/electron/services/wcdbCore.ts
+++ b/electron/services/wcdbCore.ts
@@ -173,7 +173,6 @@ export class WcdbCore {
           }
         } catch {}
       }
-
       this.connectMonitorPipe(pipePath)
       return true
     } catch (e) {
@@ -194,8 +193,14 @@ export class WcdbCore {
 
       let buffer = ''
       this.monitorPipeClient.on('data', (data: Buffer) => {
-        buffer += data.toString('utf8')
-        const lines = buffer.split('\n')
+        const rawChunk = data.toString('utf8')
+        // macOS 侧可能使用 '\0' 或无换行分隔，统一归一化并兜底拆包
+        const normalizedChunk = rawChunk
+          .replace(/\u0000/g, '\n')
+          .replace(/}\s*{/g, '}\n{')
+
+        buffer += normalizedChunk
+        const lines = buffer.split(/\r?\n/)
         buffer = lines.pop() || ''
         for (const line of lines) {
           if (line.trim()) {
@@ -207,9 +212,23 @@ export class WcdbCore {
             }
           }
         }
+
+        // 兜底：如果没有分隔符但已形成完整 JSON，则直接上报
+        const tail = buffer.trim()
+        if (tail.startsWith('{') && tail.endsWith('}')) {
+          try {
+            const parsed = JSON.parse(tail)
+            this.monitorCallback?.(parsed.action || 'update', tail)
+            buffer = ''
+          } catch {
+            // 不可解析则继续等待下一块数据
+          }
+        }
       })
 
-      this.monitorPipeClient.on('error', () => {})
+      this.monitorPipeClient.on('error', () => {
+        // 保持静默，与现有错误处理策略一致
+      })
 
       this.monitorPipeClient.on('close', () => {
         this.monitorPipeClient = null
diff --git a/electron/services/wcdbService.ts b/electron/services/wcdbService.ts
index 6aee8e9..2f5715f 100644
--- a/electron/services/wcdbService.ts
+++ b/electron/services/wcdbService.ts
@@ -136,7 +136,7 @@ export class WcdbService {
    */
   setMonitor(callback: (type: string, json: string) => void): void {
     this.monitorListener = callback;
-    this.callWorker('setMonitor').catch(() => { });
+    this.callWorker<{ success?: boolean }>('setMonitor').catch(() => { });
   }
 
   /**
diff --git a/electron/wcdbWorker.ts b/electron/wcdbWorker.ts
index 333527a..8a49cad 100644
--- a/electron/wcdbWorker.ts
+++ b/electron/wcdbWorker.ts
@@ -20,15 +20,17 @@ if (parentPort) {
                     result = { success: true }
                     break
                 case 'setMonitor':
-                    core.setMonitor((type, json) => {
+                    {
+                    const monitorOk = core.setMonitor((type, json) => {
                         parentPort!.postMessage({
                             id: -1,
                             type: 'monitor',
                             payload: { type, json }
                         })
                     })
-                    result = { success: true }
+                    result = { success: monitorOk }
                     break
+                    }
                 case 'testConnection':
                     result = await core.testConnection(payload.dbPath, payload.hexKey, payload.wxid)
                     break
diff --git a/src/pages/SettingsPage.tsx b/src/pages/SettingsPage.tsx
index db39015..7f36e75 100644
--- a/src/pages/SettingsPage.tsx
+++ b/src/pages/SettingsPage.tsx
@@ -897,6 +897,21 @@ function SettingsPage({ onClose }: SettingsPageProps = {}) {
     }
   }
 
+  const handleClearLog = async () => {
+    const confirmed = window.confirm('确定清空 wcdb.log 吗？')
+    if (!confirmed) return
+    try {
+      const result = await window.electronAPI.log.clear()
+      if (!result.success) {
+        showMessage(result.error || '清空日志失败', false)
+        return
+      }
+      showMessage('日志已清空', true)
+    } catch (e: any) {
+      showMessage(`清空日志失败: ${e}`, false)
+    }
+  }
+
   const handleClearAnalyticsCache = async () => {
     if (isClearingCache) return
     setIsClearingAnalyticsCache(true)
@@ -1427,6 +1442,9 @@ function SettingsPage({ onClose }: SettingsPageProps = {}) {
           <button className="btn btn-secondary" onClick={handleCopyLog}>
             <Copy size={16} /> 复制日志内容
           </button>
+          <button className="btn btn-secondary" onClick={handleClearLog}>
+            <Trash2 size={16} /> 清空日志
+          </button>
         </div>
       </div>
     </div>
diff --git a/src/types/electron.d.ts b/src/types/electron.d.ts
index 64806fc..efe7735 100644
--- a/src/types/electron.d.ts
+++ b/src/types/electron.d.ts
@@ -69,6 +69,7 @@ export interface ElectronAPI {
   log: {
     getPath: () => Promise<string>
     read: () => Promise<{ success: boolean; content?: string; error?: string }>
+    clear: () => Promise<{ success: boolean; error?: string }>
     debug: (data: any) => void
   }
   diagnostics: {