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b628aa7051
Add the ability to attach images (JPEG, PNG) in the Spec Creation chat interface for Claude to analyze during app specification creation. Frontend changes: - Add ImageAttachment interface to types.ts with id, filename, mimeType, base64Data, previewUrl, and size fields - Update ChatMessage interface with optional attachments field - Update useSpecChat hook to accept and send attachments via WebSocket - Add file input, drag-drop support, and preview thumbnails to SpecCreationChat component with validation (5 MB max, JPEG/PNG only) - Update ChatMessage component to render image attachments with click-to-enlarge functionality Backend changes: - Add ImageAttachment Pydantic schema with base64 validation - Update spec_creation.py WebSocket handler to parse and validate image attachments from client messages - Update spec_chat_session.py to format multimodal content blocks for Claude API using async generator pattern Features: - Drag-and-drop or click paperclip button to attach images - Preview thumbnails with remove button before sending - File type validation (image/jpeg, image/png) - File size validation (5 MB maximum) - Images display in chat history - Click images to view full size - Cross-platform compatible (Windows, macOS, Linux) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>