# Message UI & Cards Update - Complete Summary

## Overview
Successfully updated message UI and implemented thinking/actioning cards matching Paprwork v1 design with Liquid Glass styling.

## ✅ Completed Tasks

### 1. Type System Updates
**Files Modified**:
- `ui/types/core.ts`

**Changes**:
- Added `ToolCall` interface with status tracking
- Extended `CoreMessage` with `reasoning`, `streamingReasoning`, and `toolCalls` fields
- Properly typed for streaming and final states

### 2. New Components Created

#### ThinkingCard Component
**Files**: 
- `ui/components/Chat/ThinkingCard.tsx`
- `ui/components/Chat/ThinkingCard.css`

**Features**:
- Collapsible card with expand/collapse animation
- Zinc color scheme matching v1 design
- Streaming support with animated cursor
- Smooth transitions and hover states
- Info circle icon + "Thinking..." label

**Design Details**:
- Background: Zinc-400 at 5% opacity
- Border-left accent for content area
- Chevron rotates -90deg when collapsed
- fadeIn animation on expand

#### ActioningCard Component
**Files**:
- `ui/components/Chat/ActioningCard.tsx`
- `ui/components/Chat/ActioningCard.css`

**Features**:
- Three status states: calling, success, error
- Status-based color coding:
  - **Calling**: Blue background + spinner animation
  - **Success**: Gray background + result text
  - **Error**: Red background + error message
- Tool-specific emoji icons
- Pulse animation during calling state
- slideIn animation on appear

**Tool Emoji Map**:
- 🔍 Search tools
- 🧠 Memory tools
- 🖼️ Image tools
- 💻 Code tools
- 📄 File tools
- 🌐 Web tools
- 🔢 Calculator tools
- ⚡ Default/other

### 3. Message Display Updates

#### MessageItem Component
**File**: `ui/components/Chat/MessageItem.tsx`

**Changes**:
- Integrated ThinkingCard and ActioningCard components
- Renders cards in proper order:
  1. ThinkingCard (if reasoning exists)
  2. ActioningCards (if tool calls exist)
  3. Message text (main content)
- Handles streaming states for all components
- Only shows cards for assistant messages

**CSS Updates**:
- Added flex column layout with gap
- `.message-tool-calls` container for tool list

### 4. Streaming Hook Updates

#### useAgent Hook
**File**: `ui/hooks/useAgent.ts`

**New Features**:
- Added `streamingReasoningRef` to accumulate reasoning text
- Added `toolCallsMapRef` to track tool calls by ID
- Enhanced chunk handling for new types:
  - `reasoning-delta`: Appends to reasoning, updates streaming state
  - `tool-call`: Creates/updates tool with "calling" status
  - `tool-result`: Updates tool with success/error result

**Behavior**:
- Creates assistant message on first chunk (any type)
- Updates Zustand store directly for reasoning/tool changes
- Maintains refs for accumulation across chunks
- Resets all refs on message finalization

### 5. Model Picker (Previously Completed)
- Full model dropdown with Gemini 3 models
- Prevents close on button clicks
- Dynamic API key retrieval per model
- Liquid Glass styling

## Design System Alignment

### Colors
All components use Liquid Glass color system:
- **Zinc (Thinking)**: `rgba(161, 161, 170, ...)` for neutral thinking state
- **Blue (Tool Calling)**: `rgba(59, 130, 246, ...)` for active actions
- **Gray (Tool Success)**: `rgba(156, 163, 175, ...)` for completed actions
- **Red (Tool Error)**: `rgba(239, 68, 68, ...)` for failed actions

### Animations
- **fadeIn**: 0.2s ease-in-out for expand/collapse
- **slideIn**: 0.2s ease-out for card appearance
- **spin**: 1s linear infinite for spinner
- **pulse**: 2s cubic-bezier for calling state
- **blink**: 1s step-end for streaming cursor

### Typography
- **Labels**: 12px, font-weight: 500
- **Content**: 13px, line-height: 1.6
- **Subtitles**: 11px, secondary color
- All use `var(--font-body)`

## Testing Checklist

### Thinking Card
- [ ] Appears when model uses reasoning
- [ ] Streams with animated cursor
- [ ] Collapse/expand works smoothly
- [ ] Colors match zinc theme
- [ ] Hover states work
- [ ] Text wraps properly
- [ ] Border-left accent visible

### Actioning Card
- [ ] Appears when tools are called
- [ ] "Calling" state shows spinner + blue
- [ ] "Success" state shows result + gray
- [ ] "Error" state shows error + red
- [ ] Tool emojis match tool names
- [ ] Pulse animation smooth
- [ ] Multiple tools render correctly

### Message Layout
- [ ] Cards render in correct order (thinking → tools → text)
- [ ] User messages don't show cards
- [ ] Assistant messages show cards when present
- [ ] Streaming cursor position correct
- [ ] Scrolling works with multiple cards
- [ ] Mobile responsive

### Integration
- [ ] Model picker shows correct model
- [ ] API keys retrieved properly
- [ ] Streaming works for all chunk types
- [ ] Error handling works
- [ ] Multiple messages in sequence work
- [ ] State resets between messages

## Architecture Notes

### Data Flow
```
Gateway (MastraAgent)
  ↓ WebSocket chunks
useAgent hook
  ↓ handleStreamChunk()
Zustand chatStore
  ↓ useChatStore()
MessageList
  ↓ messages.map()
MessageItem
  ↓ render logic
ThinkingCard / ActioningCard / Text
```

### Streaming State
```typescript
// On first chunk (any type):
- Create assistant message
- Initialize refs: content, reasoning, toolCalls

// On reasoning-delta:
- Append to streamingReasoningRef
- Update message.streamingReasoning

// On tool-call:
- Add/update in toolCallsMapRef
- Update message.toolCalls array

// On tool-result:
- Find tool in toolCallsMapRef
- Update status + result/error
- Update message.toolCalls array

// On text-delta:
- Append to streamingContentRef
- Update message.streamingContent

// On done:
- Finalize message (isStreaming = false)
- Clear all refs
```

## Known Issues & TODOs

### Backend
1. **Tool Result Chunks**: MastraAgent needs to emit `tool-result` chunks
   - Currently only emits `tool-call`
   - Need to track tool execution and emit results
   - Should include execution time

2. **Reasoning Chunks**: Verify Mastra emits `reasoning-delta` for thinking models
   - Test with Claude Sonnet 4.5 extended thinking
   - Test with Gemini 2.5 Pro thinking

### Frontend
3. **Markdown Rendering**: Add markdown support for:
   - Thinking card content
   - Tool result text
   - Main message text

4. **Tool Call Grouping**: V1 groups related tool calls
   - Implement collapsible tool groups
   - Show summary when collapsed

5. **Persistence**: 
   - Save thinking card collapse state
   - Restore on page reload

6. **Accessibility**:
   - Add ARIA labels
   - Keyboard navigation for collapse/expand
   - Screen reader announcements

## Files Changed

### New Files (4)
- `ui/components/Chat/ThinkingCard.tsx`
- `ui/components/Chat/ThinkingCard.css`
- `ui/components/Chat/ActioningCard.tsx`
- `ui/components/Chat/ActioningCard.css`

### Modified Files (5)
- `ui/types/core.ts` - Added ToolCall interface and extended CoreMessage
- `ui/hooks/useAgent.ts` - Enhanced streaming chunk handling
- `ui/components/Chat/MessageItem.tsx` - Integrated new cards
- `ui/components/Chat/MessageItem.css` - Added flex layout
- `ui/components/Chat/ChatContainer.tsx` - (from previous model picker work)

### Documentation (3)
- `THINKING_ACTIONING_CARDS.md`
- `MESSAGE_UI_UPDATE_SUMMARY.md` (this file)
- `MODEL_PICKER_UPDATE.md` (from previous work)

## Build Status
✅ All builds passing
✅ No TypeScript errors
✅ No linter errors
✅ Bundle size: +9KB (cards + styles)

## Next Steps
1. Test in running app
2. Test with thinking-enabled models (Claude Sonnet 4.5)
3. Implement tool-result chunks in MastraAgent
4. Add markdown rendering
5. Test all edge cases
