Fix/bedrock streaming timeouts

[ibehren1]

Add Configurable Request Timeout Setting

Summary

This PR adds a configurable timeout setting for agent chat requests, replacing the hardcoded 15-minute timeout with a user-configurable option while maintaining all existing timeout functionality.

Changes Made

🔧 Settings Infrastructure

• SettingsContext.tsx: Added requestTimeout state with 15-minute default value
• AgentChatSection.tsx: Added timeout input field in Agent Chat settings
• SettingPage.tsx: Connected timeout setting to UI components
• Persistent storage integration with existing agentChatConfig

💬 Agent Chat Integration

• useAgentChat.ts: Updated to use configurable requestTimeout instead of hardcoded value
• Dynamic timeout calculation: requestTimeout * 60 * 1000 (minutes to milliseconds)
• Enhanced error messages showing actual configured timeout duration

👤 User Experience Improvements

• Console Logging: Added detailed timeout logging when request is aborted
• Chat Messages: Timeout notifications now appear directly in chat interface
• Toast Notifications: Existing toast errors updated with dynamic timeout values
• Visual Feedback: Maintains existing heartbeat dots and loading indicators

Key Features

✅ Configurable Timeout: Users can set custom timeout values (default: 15 minutes)
✅ Persistent Settings: Timeout preference survives app restarts
✅ Enhanced Feedback: Multiple notification channels (console, chat, toast)
✅ Backward Compatible: Maintains existing 15-minute default behavior
✅ Heartbeat Integration: Works seamlessly with existing 30-second heartbeat monitoring
✅ Request Abortion: Proper cleanup when timeout is reached

Technical Implementation

Settings Flow

1. User configures timeout in Settings → Agent Chat
2. Value stored in agentChatConfig.requestTimeout
3. useAgentChat hook reads setting via useSettings()
4. Timeout applied to streaming requests dynamically

Timeout Handling

const TIMEOUT_MS = requestTimeout * 60 * 1000 // Convert minutes to milliseconds

// When timeout occurs:
1. Console log: "Request timed out after X minutes - aborting request"
2. Chat message: Assistant message with timeout notification  
3. Toast error: "Request timed out after X minutes"
4. Request abortion: Clean AbortController.abort() call

UI Components

• Input Field: Number input with validation (min: 1 minute)
• Help Text: Clear description of timeout functionality
• Integration: Seamlessly fits into existing Agent Chat settings section

Testing Considerations

• ✅ Default behavior unchanged (15 minutes)
• ✅ Settings persistence across app restarts
• ✅ Dynamic timeout calculation accuracy
• ✅ Proper request abortion and cleanup
• ✅ User feedback in all channels (console, chat, toast)
• ✅ Heartbeat monitoring continues to function
• ✅ Auto-scroll maintains focus on latest messages

Breaking Changes

None - this is a purely additive feature with backward compatibility.

Related Issues

Addresses timeout configuration requests and improves user control over agent response timeouts.

Screenshots

Settings UI showing new timeout configuration field in Agent Chat section

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Ready for Review ✅

[ibehren1]

Updated to fix type error. Ready for workflow to run again.

[daisuke-awaji]

@ibehren1 thanks for your contribution