Replaces the screenshot placeholder with a live animated demo showing:
- Sidebar with fake sessions and token usage bars
- User typing animation with cursor
- Thinking indicator with animated dots
- Colored tool call badges (web_search, exec)
- Expandable tool results with parameters
- Formatted assistant response with markdown
- Auto-looping animation
All pure CSS/JS, no dependencies. Matches the app's dark theme and color scheme.
Closes feedback item #12
Reorder and rewrite feature descriptions to highlight what actually
differentiates PinchChat: tool call visualization, GPT-like interface,
multi-session navigation. Remove generic features (markdown, file upload,
dark theme) that don't sell the product. Pragmatic tone, no fluff.
