fix(ai): avoid logging user message content

apps/desktop/main/ai/agent-stream-runner.ts

@@ -97,7 +97,7 @@ export function createElectronRunAgentStream(
     const requestId = `internal_${Date.now()}`
 
     aiLogger.info('AgentStream', `Agent stream request: ${requestId}`, {
-      userMessage: userMessage.slice(0, 100),
+      userMessageLength: userMessage.length,
       sessionId,
       aiChatId,
       chatType: chatType ?? 'group',

apps/desktop/main/ai/agent/index.ts

@@ -86,7 +86,7 @@ export class Agent {
   }
 
   async executeStream(userMessage: string, onChunk: (chunk: AgentStreamChunk) => void): Promise<AgentResult> {
-    aiLogger.info('Agent', 'User question', userMessage)
+    aiLogger.info('Agent', 'Agent execution started', { userMessageLength: userMessage.length })
 
     const maxToolRounds = Math.max(0, this.config.maxToolRounds ?? 0)