feat(#39): replace console.log/error/warn with structured client logger

Add src/lib/client-logger.ts and replace all 55+ console calls across 19 client files with scoped createClientLogger instances. Production suppresses debug+info. Fix variable shadowing in log-viewer-panel.tsx.

Addresses #39

src/components/ErrorBoundary.tsx

@@ -1,6 +1,9 @@
 'use client'
 
 import { Component, type ErrorInfo, type ReactNode } from 'react'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('ErrorBoundary')
 
 interface Props {
   children: ReactNode
@@ -23,7 +26,7 @@ export class ErrorBoundary extends Component<Props, State> {
   }
 
   componentDidCatch(error: Error, errorInfo: ErrorInfo) {
-    console.error('Panel error:', error, errorInfo)
+    log.error('Panel error:', error, errorInfo)
   }
 
   render() {

src/components/chat/chat-panel.tsx

@@ -3,10 +3,13 @@
 import { useEffect, useCallback, useState, useRef } from 'react'
 import { useMissionControl } from '@/store'
 import { useSmartPoll } from '@/lib/use-smart-poll'
+import { createClientLogger } from '@/lib/client-logger'
 import { ConversationList } from './conversation-list'
 import { MessageList } from './message-list'
 import { ChatInput } from './chat-input'
 
+const log = createClientLogger('ChatPanel')
+
 export function ChatPanel() {
   const {
     chatPanelOpen,
@@ -52,7 +55,7 @@ export function ChatPanel() {
         const data = await res.json()
         if (data.agents) setAgents(data.agents)
       } catch (err) {
-        console.error('Failed to load agents:', err)
+        log.error('Failed to load agents:', err)
       }
     }
     if (chatPanelOpen) loadAgents()
@@ -67,7 +70,7 @@ export function ChatPanel() {
       const data = await res.json()
       if (data.messages) setChatMessages(data.messages)
     } catch (err) {
-      console.error('Failed to load messages:', err)
+      log.error('Failed to load messages:', err)
     }
   }, [activeConversation, setChatMessages])
 
@@ -145,7 +148,7 @@ export function ChatPanel() {
         updatePendingMessage(tempId, { pendingStatus: 'failed' })
       }
     } catch (err) {
-      console.error('Failed to send message:', err)
+      log.error('Failed to send message:', err)
       updatePendingMessage(tempId, { pendingStatus: 'failed' })
     }
   }

src/components/chat/conversation-list.tsx

@@ -3,6 +3,9 @@
 import { useState, useCallback } from 'react'
 import { useMissionControl, Conversation, Agent } from '@/store'
 import { useSmartPoll } from '@/lib/use-smart-poll'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('ConversationList')
 
 function timeAgo(timestamp: number): string {
   const diff = Math.floor(Date.now() / 1000) - timestamp
@@ -64,7 +67,7 @@ export function ConversationList({ onNewConversation }: ConversationListProps) {
         )
       }
     } catch (err) {
-      console.error('Failed to load conversations:', err)
+      log.error('Failed to load conversations:', err)
     }
   }, [setConversations])
 

src/components/dashboard/sidebar.tsx

@@ -3,6 +3,9 @@
 import { useEffect, useState } from 'react'
 import { useMissionControl } from '@/store'
 import { useNavigateToPanel } from '@/lib/navigation'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('Sidebar')
 
 interface MenuItem {
   id: string
@@ -36,7 +39,7 @@ export function Sidebar() {
     fetch('/api/status?action=overview')
       .then(res => res.json())
       .then(data => setSystemStats(data))
-      .catch(err => console.error('Failed to fetch system status:', err))
+      .catch(err => log.error('Failed to fetch system status:', err))
   }, [])
 
   const activeSessions = sessions.filter(s => s.active).length

src/components/panels/agent-cost-panel.tsx

@@ -1,11 +1,14 @@
 'use client'
 
 import { useState, useEffect, useCallback } from 'react'
+import { createClientLogger } from '@/lib/client-logger'
 import {
   PieChart, Pie, Cell, LineChart, Line, XAxis, YAxis, CartesianGrid,
   Tooltip, Legend, ResponsiveContainer,
 } from 'recharts'
 
+const log = createClientLogger('AgentCostPanel')
+
 interface AgentCostData {
   stats: { totalTokens: number; totalCost: number; requestCount: number; avgTokensPerRequest: number; avgCostPerRequest: number }
   models: Record<string, { totalTokens: number; totalCost: number; requestCount: number }>
@@ -34,7 +37,7 @@ export function AgentCostPanel() {
       const json = await res.json()
       setData(json)
     } catch (err) {
-      console.error('Failed to load agent costs:', err)
+      log.error('Failed to load agent costs:', err)
     } finally {
       setIsLoading(false)
     }

src/components/panels/agent-detail-tabs.tsx

@@ -1,6 +1,9 @@
 'use client'
 
 import { useState, useEffect } from 'react'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('AgentDetailTabs')
 
 interface Agent {
   id: number
@@ -373,7 +376,7 @@ export function SoulTab({
         setSelectedTemplate(templateName)
       }
     } catch (error) {
-      console.error('Failed to load template:', error)
+      log.error('Failed to load template:', error)
     }
   }
 
@@ -620,7 +623,7 @@ export function TasksTab({ agent }: { agent: Agent }) {
           setTasks(data.tasks || [])
         }
       } catch (error) {
-        console.error('Failed to fetch tasks:', error)
+        log.error('Failed to fetch tasks:', error)
       } finally {
         setLoading(false)
       }
@@ -713,7 +716,7 @@ export function ActivityTab({ agent }: { agent: Agent }) {
           setActivities(data.activities || [])
         }
       } catch (error) {
-        console.error('Failed to fetch activities:', error)
+        log.error('Failed to fetch activities:', error)
       } finally {
         setLoading(false)
       }

src/components/panels/agent-spawn-panel.tsx

@@ -2,6 +2,9 @@
 
 import { useState, useEffect } from 'react'
 import { useMissionControl } from '@/store'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('AgentSpawnPanel')
 
 interface SpawnFormData {
   task: string
@@ -33,7 +36,7 @@ export function AgentSpawnPanel() {
     fetch('/api/spawn')
       .then(res => res.json())
       .then(data => setSpawnHistory(data.history || []))
-      .catch(err => console.error('Failed to load spawn history:', err))
+      .catch(err => log.error('Failed to load spawn history:', err))
   }, [])
 
   const handleSpawn = async () => {
@@ -95,7 +98,7 @@ export function AgentSpawnPanel() {
         })
       }
     } catch (error) {
-      console.error('Spawn error:', error)
+      log.error('Spawn error:', error)
       updateSpawnRequest(spawnId, {
         status: 'failed',
         error: error instanceof Error ? error.message : 'Network error'

src/components/panels/agent-squad-panel-phase3.tsx

@@ -2,6 +2,7 @@
 
 import { useState, useEffect, useCallback } from 'react'
 import { useSmartPoll } from '@/lib/use-smart-poll'
+import { createClientLogger } from '@/lib/client-logger'
 import { AgentAvatar } from '@/components/ui/agent-avatar'
 import {
   OverviewTab,
@@ -13,6 +14,8 @@ import {
   CreateAgentModal
 } from './agent-detail-tabs'
 
+const log = createClientLogger('AgentSquadPhase3')
+
 interface Agent {
   id: number
   name: string
@@ -148,7 +151,7 @@ export function AgentSquadPanelPhase3() {
           : agent
       ))
     } catch (error) {
-      console.error('Failed to update agent status:', error)
+      log.error('Failed to update agent status:', error)
       setError('Failed to update agent status')
     }
   }
@@ -171,7 +174,7 @@ export function AgentSquadPanelPhase3() {
 
       await updateAgentStatus(agentName, 'idle', 'Manually woken via session')
     } catch (error) {
-      console.error('Failed to wake agent:', error)
+      log.error('Failed to wake agent:', error)
       setError('Failed to wake agent')
     }
   }
@@ -503,7 +506,7 @@ function AgentDetailModalPhase3({
           setSoulTemplates(data.templates || [])
         }
       } catch (error) {
-        console.error('Failed to load SOUL templates:', error)
+        log.error('Failed to load SOUL templates:', error)
       }
     }
     
@@ -522,7 +525,7 @@ function AgentDetailModalPhase3({
         setHeartbeatData(data)
       }
     } catch (error) {
-      console.error('Failed to perform heartbeat:', error)
+      log.error('Failed to perform heartbeat:', error)
     } finally {
       setLoadingHeartbeat(false)
     }
@@ -544,7 +547,7 @@ function AgentDetailModalPhase3({
       setEditing(false)
       onUpdate()
     } catch (error) {
-      console.error('Failed to update agent:', error)
+      log.error('Failed to update agent:', error)
     }
   }
 
@@ -564,7 +567,7 @@ function AgentDetailModalPhase3({
       setFormData(prev => ({ ...prev, soul_content: content }))
       onUpdate()
     } catch (error) {
-      console.error('Failed to update SOUL:', error)
+      log.error('Failed to update SOUL:', error)
     }
   }
 
@@ -585,7 +588,7 @@ function AgentDetailModalPhase3({
       setFormData(prev => ({ ...prev, working_memory: data.working_memory }))
       onUpdate()
     } catch (error) {
-      console.error('Failed to update memory:', error)
+      log.error('Failed to update memory:', error)
     }
   }
 
@@ -746,7 +749,7 @@ function QuickSpawnModal({
         alert(result.error || 'Failed to spawn agent')
       }
     } catch (error) {
-      console.error('Spawn failed:', error)
+      log.error('Spawn failed:', error)
       alert('Network error occurred')
     } finally {
       setIsSpawning(false)

src/components/panels/agent-squad-panel.tsx

@@ -1,6 +1,9 @@
 'use client'
 
 import { useState, useEffect, useCallback } from 'react'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('AgentSquadPanel')
 
 interface Agent {
   id: number
@@ -103,7 +106,7 @@ export function AgentSquadPanel() {
           : agent
       ))
     } catch (error) {
-      console.error('Failed to update agent status:', error)
+      log.error('Failed to update agent status:', error)
       setError('Failed to update agent status')
     }
   }
@@ -355,7 +358,7 @@ function AgentDetailModal({
       setEditing(false)
       onUpdate()
     } catch (error) {
-      console.error('Failed to update agent:', error)
+      log.error('Failed to update agent:', error)
     }
   }
 
@@ -540,7 +543,7 @@ function CreateAgentModal({
       onCreated()
       onClose()
     } catch (error) {
-      console.error('Error creating agent:', error)
+      log.error('Error creating agent:', error)
     }
   }
 

src/components/panels/cron-management-panel.tsx

@@ -2,6 +2,9 @@
 
 import { useState, useEffect, useCallback } from 'react'
 import { useMissionControl, CronJob } from '@/store'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('CronManagement')
 
 interface NewJobForm {
   name: string
@@ -90,7 +93,7 @@ export function CronManagementPanel() {
       const data = await response.json()
       setCronJobs(data.jobs || [])
     } catch (error) {
-      console.error('Failed to load cron jobs:', error)
+      log.error('Failed to load cron jobs:', error)
     } finally {
       setIsLoading(false)
     }
@@ -124,7 +127,7 @@ export function CronManagementPanel() {
       const data = await response.json()
       setJobLogs(data.logs || [])
     } catch (error) {
-      console.error('Failed to load job logs:', error)
+      log.error('Failed to load job logs:', error)
       setJobLogs([])
     }
   }
@@ -148,7 +151,7 @@ export function CronManagementPanel() {
         alert(`Failed to toggle job: ${error.error}`)
       }
     } catch (error) {
-      console.error('Failed to toggle job:', error)
+      log.error('Failed to toggle job:', error)
       alert('Network error occurred')
     }
   }
@@ -173,7 +176,7 @@ export function CronManagementPanel() {
         alert(`Job failed:\n${result.error}\n${result.stderr}`)
       }
     } catch (error) {
-      console.error('Failed to trigger job:', error)
+      log.error('Failed to trigger job:', error)
       alert('Network error occurred')
     }
   }
@@ -212,7 +215,7 @@ export function CronManagementPanel() {
         alert(`Failed to add job: ${error.error}`)
       }
     } catch (error) {
-      console.error('Failed to add job:', error)
+      log.error('Failed to add job:', error)
       alert('Network error occurred')
     }
   }
@@ -242,7 +245,7 @@ export function CronManagementPanel() {
         alert(`Failed to remove job: ${error.error}`)
       }
     } catch (error) {
-      console.error('Failed to remove job:', error)
+      log.error('Failed to remove job:', error)
       alert('Network error occurred')
     }
   }

src/components/panels/log-viewer-panel.tsx

@@ -3,6 +3,9 @@
 import { useState, useEffect, useRef, useCallback } from 'react'
 import { useMissionControl } from '@/store'
 import { useSmartPoll } from '@/lib/use-smart-poll'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('LogViewer')
 
 interface LogFilters {
   level?: string
@@ -36,7 +39,7 @@ export function LogViewerPanel() {
   }, [logFilters])
 
   const loadLogs = useCallback(async (tail = false) => {
-    console.log(`LogViewer: Loading logs (tail=${tail})`)
+    log.debug(`Loading logs (tail=${tail})`)
     setIsLoading(!tail) // Only show loading for initial load, not for tailing
 
     try {
@@ -53,37 +56,37 @@ export function LogViewerPanel() {
         ...(tail && currentLogs.length > 0 && { since: currentLogs[0]?.timestamp.toString() })
       })
 
-      console.log(`LogViewer: Fetching /api/logs?${params}`)
+      log.debug(`Fetching /api/logs?${params}`)
       const response = await fetch(`/api/logs?${params}`)
       const data = await response.json()
 
-      console.log(`LogViewer: Received ${data.logs?.length || 0} logs from API`)
+      log.debug(`Received ${data.logs?.length || 0} logs from API`)
 
       if (data.logs && data.logs.length > 0) {
         if (tail) {
           // Add new logs for tail mode - prepend to existing logs
           let newLogsAdded = 0
           const existingIds = new Set((currentLogs || []).map((l: any) => l?.id).filter(Boolean))
-          data.logs.reverse().forEach((log: any) => {
+          data.logs.reverse().forEach((entry: any) => {
-            if (existingIds.has(log?.id)) return
+            if (existingIds.has(entry?.id)) return
-            addLog(log)
+            addLog(entry)
             newLogsAdded++
           })
-          console.log(`LogViewer: Added ${newLogsAdded} new logs (tail mode)`)
+          log.debug(`Added ${newLogsAdded} new logs (tail mode)`)
         } else {
           // Replace logs for initial load or refresh
-          console.log(`LogViewer: Clearing existing logs and loading ${data.logs.length} logs`)
+          log.debug(`Clearing existing logs and loading ${data.logs.length} logs`)
           clearLogs() // Clear existing logs
-          data.logs.reverse().forEach((log: any) => {
+          data.logs.reverse().forEach((entry: any) => {
-            addLog(log)
+            addLog(entry)
           })
-          console.log(`LogViewer: Successfully added ${data.logs.length} logs to store`)
+          log.debug(`Successfully added ${data.logs.length} logs to store`)
         }
       } else {
-        console.log('LogViewer: No logs received from API')
+        log.debug('No logs received from API')
       }
     } catch (error) {
-      console.error('LogViewer: Failed to load logs:', error)
+      log.error('Failed to load logs:', error)
     } finally {
       setIsLoading(false)
     }
@@ -95,13 +98,13 @@ export function LogViewerPanel() {
       const data = await response.json()
       setAvailableSources(data.sources || [])
     } catch (error) {
-      console.error('Failed to load log sources:', error)
+      log.error('Failed to load log sources:', error)
     }
   }, [])
 
   // Load initial logs and sources
   useEffect(() => {
-    console.log('LogViewer: Initial load started')
+    log.debug('Initial load started')
     loadLogs()
     loadSources()
   }, [loadLogs, loadSources])
@@ -154,16 +157,16 @@ export function LogViewerPanel() {
     }
   }
 
-  const filteredLogs = logs.filter(log => {
+  const filteredLogs = logs.filter(entry => {
-    if (logFilters.level && log.level !== logFilters.level) return false
+    if (logFilters.level && entry.level !== logFilters.level) return false
-    if (logFilters.source && log.source !== logFilters.source) return false
+    if (logFilters.source && entry.source !== logFilters.source) return false
-    if (logFilters.search && !log.message.toLowerCase().includes(logFilters.search.toLowerCase())) return false
+    if (logFilters.search && !entry.message.toLowerCase().includes(logFilters.search.toLowerCase())) return false
-    if (logFilters.session && (!log.session || !log.session.includes(logFilters.session))) return false
+    if (logFilters.session && (!entry.session || !entry.session.includes(logFilters.session))) return false
     return true
   })
 
   // Debug logging
-  console.log(`LogViewer: Store has ${logs.length} logs, filtered to ${filteredLogs.length}`)
+  log.debug(`Store has ${logs.length} logs, filtered to ${filteredLogs.length}`)
 
   return (
     <div className="flex flex-col h-full p-6 space-y-4">

src/components/panels/memory-browser-panel.tsx

@@ -2,6 +2,9 @@
 
 import React, { useState, useEffect, useCallback } from 'react'
 import { useMissionControl } from '@/store'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('MemoryBrowser')
 
 interface MemoryFile {
   path: string
@@ -46,7 +49,7 @@ export function MemoryBrowserPanel() {
       // Auto-expand some common directories
       setExpandedFolders(new Set(['daily', 'knowledge']))
     } catch (error) {
-      console.error('Failed to load file tree:', error)
+      log.error('Failed to load file tree:', error)
     } finally {
       setIsLoading(false)
     }
@@ -83,7 +86,7 @@ export function MemoryBrowserPanel() {
         alert(data.error || 'Failed to load file content')
       }
     } catch (error) {
-      console.error('Failed to load file content:', error)
+      log.error('Failed to load file content:', error)
       alert('Network error occurred')
     } finally {
       setIsLoading(false)
@@ -99,7 +102,7 @@ export function MemoryBrowserPanel() {
       const data = await response.json()
       setSearchResults(data.results || [])
     } catch (error) {
-      console.error('Search failed:', error)
+      log.error('Search failed:', error)
       setSearchResults([])
     } finally {
       setIsSearching(false)
@@ -165,7 +168,7 @@ export function MemoryBrowserPanel() {
         alert(data.error || 'Failed to save file')
       }
     } catch (error) {
-      console.error('Failed to save file:', error)
+      log.error('Failed to save file:', error)
       alert('Network error occurred')
     } finally {
       setIsSaving(false)
@@ -192,7 +195,7 @@ export function MemoryBrowserPanel() {
         alert(data.error || 'Failed to create file')
       }
     } catch (error) {
-      console.error('Failed to create file:', error)
+      log.error('Failed to create file:', error)
       alert('Network error occurred')
     }
   }
@@ -220,7 +223,7 @@ export function MemoryBrowserPanel() {
         alert(data.error || 'Failed to delete file')
       }
     } catch (error) {
-      console.error('Failed to delete file:', error)
+      log.error('Failed to delete file:', error)
       alert('Network error occurred')
     }
   }

src/components/panels/session-details-panel.tsx

@@ -3,6 +3,9 @@
 import { useState, useCallback } from 'react'
 import { useMissionControl } from '@/store'
 import { useSmartPoll } from '@/lib/use-smart-poll'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('SessionDetails')
 
 export function SessionDetailsPanel() {
   const { 
@@ -20,7 +23,7 @@ export function SessionDetailsPanel() {
       const data = await response.json()
       setSessions(data.sessions || data)
     } catch (error) {
-      console.error('Failed to load sessions:', error)
+      log.error('Failed to load sessions:', error)
     }
   }, [setSessions])
 

src/components/panels/standup-panel.tsx

@@ -1,6 +1,9 @@
 'use client'
 
 import { useState, useEffect } from 'react'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('StandupPanel')
 
 interface StandupReport {
   date: string
@@ -133,7 +136,7 @@ export function StandupPanel() {
       const data = await response.json()
       setStandupHistory(data.history || [])
     } catch (err) {
-      console.error('Failed to fetch standup history:', err)
+      log.error('Failed to fetch standup history:', err)
     }
   }
 

src/components/panels/task-board-panel.tsx

@@ -3,9 +3,12 @@
 import { useState, useEffect, useCallback, useRef } from 'react'
 import { useMissionControl } from '@/store'
 import { useSmartPoll } from '@/lib/use-smart-poll'
+import { createClientLogger } from '@/lib/client-logger'
 import { AgentAvatar } from '@/components/ui/agent-avatar'
 import { MarkdownRenderer } from '@/components/markdown-renderer'
 
+const log = createClientLogger('TaskBoard')
+
 interface Task {
   id: number
   title: string
@@ -869,7 +872,7 @@ function CreateTaskModal({
       onCreated()
       onClose()
     } catch (error) {
-      console.error('Error creating task:', error)
+      log.error('Error creating task:', error)
     }
   }
 
@@ -1011,7 +1014,7 @@ function EditTaskModal({
 
       onUpdated()
     } catch (error) {
-      console.error('Error updating task:', error)
+      log.error('Error updating task:', error)
     }
   }
 

src/components/panels/token-dashboard-panel.tsx

@@ -2,8 +2,11 @@
 
 import { useState, useEffect, useCallback } from 'react'
 import { useMissionControl } from '@/store'
+import { createClientLogger } from '@/lib/client-logger'
 import { LineChart, Line, XAxis, YAxis, CartesianGrid, Tooltip, Legend, ResponsiveContainer, BarChart, Bar, PieChart, Pie, Cell } from 'recharts'
 
+const log = createClientLogger('TokenDashboard')
+
 interface UsageStats {
   summary: {
     totalTokens: number
@@ -39,7 +42,7 @@ export function TokenDashboardPanel() {
       const data = await response.json()
       setUsageStats(data)
     } catch (error) {
-      console.error('Failed to load usage stats:', error)
+      log.error('Failed to load usage stats:', error)
     } finally {
       setIsLoading(false)
     }
@@ -51,7 +54,7 @@ export function TokenDashboardPanel() {
       const data = await response.json()
       setTrendData(data)
     } catch (error) {
-      console.error('Failed to load trend data:', error)
+      log.error('Failed to load trend data:', error)
     }
   }, [selectedTimeframe])
 
@@ -80,7 +83,7 @@ export function TokenDashboardPanel() {
       window.URL.revokeObjectURL(url)
       document.body.removeChild(a)
     } catch (error) {
-      console.error('Export failed:', error)
+      log.error('Export failed:', error)
       alert('Export failed: ' + error)
     } finally {
       setIsExporting(false)

src/lib/client-logger.ts

@@ -0,0 +1,68 @@
+/**
+ * Lightweight structured logger for client-side ('use client') components.
+ *
+ * Mirrors pino's API surface (info/warn/error/debug) so call sites are
+ * consistent with the server-side logger in src/lib/logger.ts.
+ * In production builds, debug and info messages are suppressed.
+ */
+
+type LogLevel = 'debug' | 'info' | 'warn' | 'error'
+
+const LOG_LEVELS: Record<LogLevel, number> = {
+  debug: 10,
+  info: 20,
+  warn: 30,
+  error: 40,
+}
+
+const minLevel: number =
+  process.env.NODE_ENV === 'production' ? LOG_LEVELS.warn : LOG_LEVELS.debug
+
+function shouldLog(level: LogLevel): boolean {
+  return LOG_LEVELS[level] >= minLevel
+}
+
+function formatArgs(
+  level: LogLevel,
+  module: string,
+  msgOrObj: unknown,
+  ...rest: unknown[]
+): unknown[] {
+  const prefix = `[${level.toUpperCase()}] ${module}:`
+  if (typeof msgOrObj === 'string') {
+    return [prefix, msgOrObj, ...rest]
+  }
+  return [prefix, msgOrObj, ...rest]
+}
+
+export interface ClientLogger {
+  debug(msg: string, ...args: unknown[]): void
+  debug(obj: Record<string, unknown>, msg?: string): void
+  info(msg: string, ...args: unknown[]): void
+  info(obj: Record<string, unknown>, msg?: string): void
+  warn(msg: string, ...args: unknown[]): void
+  warn(obj: Record<string, unknown>, msg?: string): void
+  error(msg: string, ...args: unknown[]): void
+  error(obj: Record<string, unknown>, msg?: string): void
+}
+
+export function createClientLogger(module: string): ClientLogger {
+  return {
+    debug(msgOrObj: unknown, ...rest: unknown[]) {
+      if (!shouldLog('debug')) return
+      console.debug(...formatArgs('debug', module, msgOrObj, ...rest))
+    },
+    info(msgOrObj: unknown, ...rest: unknown[]) {
+      if (!shouldLog('info')) return
+      console.info(...formatArgs('info', module, msgOrObj, ...rest))
+    },
+    warn(msgOrObj: unknown, ...rest: unknown[]) {
+      if (!shouldLog('warn')) return
+      console.warn(...formatArgs('warn', module, msgOrObj, ...rest))
+    },
+    error(msgOrObj: unknown, ...rest: unknown[]) {
+      if (!shouldLog('error')) return
+      console.error(...formatArgs('error', module, msgOrObj, ...rest))
+    },
+  }
+}

src/lib/device-identity.ts

@@ -1,5 +1,9 @@
 'use client'
 
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('DeviceIdentity')
+
 /**
  * Ed25519 device identity for OpenClaw gateway protocol v3 challenge-response.
  *
@@ -101,7 +105,7 @@ export async function getOrCreateDeviceIdentity(): Promise<DeviceIdentity> {
       }
     } catch {
       // Stored key corrupted — regenerate
-      console.warn('Device identity keys corrupted, regenerating...')
+      log.warn('Device identity keys corrupted, regenerating...')
     }
   }
 

src/lib/use-server-events.ts

@@ -2,6 +2,9 @@
 
 import { useEffect, useRef } from 'react'
 import { useMissionControl } from '@/store'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('SSE')
 
 interface ServerEvent {
   type: string
@@ -73,7 +76,7 @@ export function useServerEvents() {
 
         const attempts = sseReconnectAttemptsRef.current
         if (attempts >= SSE_MAX_RECONNECT_ATTEMPTS) {
-          console.error(`SSE: max reconnect attempts (${SSE_MAX_RECONNECT_ATTEMPTS}) reached`)
+          log.error(`Max reconnect attempts (${SSE_MAX_RECONNECT_ATTEMPTS}) reached`)
           return
         }
 
@@ -82,7 +85,7 @@ export function useServerEvents() {
         const delay = Math.round(base + Math.random() * base * 0.5)
         sseReconnectAttemptsRef.current = attempts + 1
 
-        console.warn(`SSE: reconnecting in ${delay}ms (attempt ${attempts + 1}/${SSE_MAX_RECONNECT_ATTEMPTS})`)
+        log.warn(`Reconnecting in ${delay}ms (attempt ${attempts + 1}/${SSE_MAX_RECONNECT_ATTEMPTS})`)
         reconnectTimeoutRef.current = setTimeout(() => {
           if (mounted) connect()
         }, delay)

src/lib/websocket.ts

@@ -10,6 +10,9 @@ import {
   cacheDeviceToken,
 } from '@/lib/device-identity'
 import { APP_VERSION } from '@/lib/version'
+import { createClientLogger } from '@/lib/client-logger'
+
+const log = createClientLogger('WebSocket')
 
 // Gateway protocol version (v3 required by OpenClaw 2026.x)
 const PROTOCOL_VERSION = 3
@@ -115,7 +118,7 @@ export function useWebSocket() {
 
       // Check missed pongs
       if (missedPongsRef.current >= MAX_MISSED_PONGS) {
-        console.warn(`Missed ${MAX_MISSED_PONGS} pongs, triggering reconnect`)
+        log.warn(`Missed ${MAX_MISSED_PONGS} pongs, triggering reconnect`)
         addLog({
           id: `heartbeat-${Date.now()}`,
           timestamp: Date.now(),
@@ -212,7 +215,7 @@ export function useWebSocket() {
           nonce,
         }
       } catch (err) {
-        console.warn('Device identity unavailable, proceeding without:', err)
+        log.warn('Device identity unavailable, proceeding without:', err)
       }
     }
 
@@ -238,7 +241,7 @@ export function useWebSocket() {
         deviceToken: cachedToken || undefined,
       }
     }
-    console.log('Sending connect handshake:', connectRequest)
+    log.info('Sending connect handshake')
     ws.send(JSON.stringify(connectRequest))
   }, [])
 
@@ -248,7 +251,7 @@ export function useWebSocket() {
 
     // Debug logging for development
     if (process.env.NODE_ENV === 'development') {
-      console.log('WebSocket message received:', message.type, message)
+      log.debug(`Message received: ${message.type}`)
     }
 
     switch (message.type) {
@@ -318,24 +321,24 @@ export function useWebSocket() {
         break
 
       default:
-        console.log('Unknown gateway message type:', message.type)
+        log.warn(`Unknown gateway message type: ${message.type}`)
     }
   }, [setLastMessage, setSessions, addLog, updateSpawnRequest, setCronJobs, addTokenUsage])
 
   // Handle gateway protocol frames
   const handleGatewayFrame = useCallback((frame: GatewayFrame, ws: WebSocket) => {
-    console.log('Gateway frame:', frame)
+    log.debug(`Gateway frame: ${frame.type}`)
 
     // Handle connect challenge
     if (frame.type === 'event' && frame.event === 'connect.challenge') {
-      console.log('Received connect challenge, sending handshake...')
+      log.info('Received connect challenge, sending handshake')
       sendConnectHandshake(ws, frame.payload?.nonce)
       return
     }
 
     // Handle connect response (handshake success)
     if (frame.type === 'res' && frame.ok && !handshakeCompleteRef.current) {
-      console.log('Handshake complete!')
+      log.info('Handshake complete')
       handshakeCompleteRef.current = true
       reconnectAttemptsRef.current = 0
       // Cache device token if returned by gateway
@@ -360,7 +363,7 @@ export function useWebSocket() {
 
     // Handle connect error
     if (frame.type === 'res' && !frame.ok) {
-      console.error('Gateway error:', frame.error)
+      log.error(`Gateway error: ${frame.error?.message || JSON.stringify(frame.error)}`)
       const rawMessage = frame.error?.message || JSON.stringify(frame.error)
       const help = getGatewayErrorHelp(rawMessage)
       const nonRetryable = isNonRetryableGatewayError(rawMessage)
@@ -509,14 +512,14 @@ export function useWebSocket() {
       wsRef.current = ws
 
       ws.onopen = () => {
-        console.log('WebSocket connected to', url.split('?')[0])
+        log.info(`Connected to ${url.split('?')[0]}`)
         // Don't set isConnected yet - wait for handshake
         setConnection({
           url: url.split('?')[0],
           reconnectAttempts: 0
         })
         // Wait for connect.challenge from server
-        console.log('Waiting for connect challenge...')
+        log.debug('Waiting for connect challenge')
       }
 
       ws.onmessage = (event) => {
@@ -524,7 +527,7 @@ export function useWebSocket() {
           const frame = JSON.parse(event.data) as GatewayFrame
           handleGatewayFrame(frame, ws)
         } catch (error) {
-          console.error('Failed to parse WebSocket message:', error)
+          log.error('Failed to parse WebSocket message:', error)
           addLog({
             id: `raw-${Date.now()}`,
             timestamp: Date.now(),
@@ -536,7 +539,7 @@ export function useWebSocket() {
       }
 
       ws.onclose = (event) => {
-        console.log('Disconnected from Gateway:', event.code, event.reason)
+        log.info(`Disconnected from Gateway: ${event.code} ${event.reason}`)
         setConnection({ isConnected: false })
         handshakeCompleteRef.current = false
         stopHeartbeat()
@@ -554,7 +557,7 @@ export function useWebSocket() {
         if (attempts < maxReconnectAttempts) {
           const base = Math.min(Math.pow(2, attempts) * 1000, 30000)
           const timeout = Math.round(base + Math.random() * base * 0.5)
-          console.log(`Reconnecting in ${timeout}ms... (attempt ${attempts + 1}/${maxReconnectAttempts})`)
+          log.info(`Reconnecting in ${timeout}ms (attempt ${attempts + 1}/${maxReconnectAttempts})`)
 
           reconnectAttemptsRef.current = attempts + 1
           setConnection({ reconnectAttempts: attempts + 1 })
@@ -562,7 +565,7 @@ export function useWebSocket() {
             connectRef.current(reconnectUrl.current, authTokenRef.current)
           }, timeout)
         } else {
-          console.error('Max reconnection attempts reached.')
+          log.error('Max reconnection attempts reached')
           addLog({
             id: `error-${Date.now()}`,
             timestamp: Date.now(),
@@ -574,7 +577,7 @@ export function useWebSocket() {
       }
 
       ws.onerror = (error) => {
-        console.error('WebSocket error:', error)
+        log.error('WebSocket error:', error)
         addLog({
           id: `error-${Date.now()}`,
           timestamp: Date.now(),
@@ -585,7 +588,7 @@ export function useWebSocket() {
       }
 
     } catch (error) {
-      console.error('Failed to connect to WebSocket:', error)
+      log.error('Failed to connect to WebSocket:', error)
       setConnection({ isConnected: false })
     }
   }, [setConnection, handleGatewayFrame, addLog, stopHeartbeat])