Add aquaticBackground/ module with OceanScene (unified gradient, light rays,
sea floor, corals, seaweed, decorations), plus independent overlay layers
(BubbleStream, FishSchool, JellyfishDrift, EventOverlay, EdgeFade). Includes
event scheduling engine with 4 frequency tiers (minutes/hours/days/months)
and 20 random events with localStorage persistence.
Add shared CodeBlock component with copy-to-clipboard button, terminal-matched
monospace font (Consolas), and proper line-height/letter-spacing. Refactor
EditCard, WriteCard, TaskCard, and ToolResultBlock to use CodeBlock. Fix
markdown code block alignment to match terminal rendering.
- Redesign all tool cards (Edit, Read, Bash, Grep, Glob, Write) to be
compact single-line headers with inline key info and toggle buttons
- Make cards and bubbles fully transparent with subtle color tints
- Remove borders, use only left accent bar per card type
- Color-code numbers: red for removals, green for additions/counts
- Simplify ToolResultBlock to render content directly without toggle
- Group consecutive assistant messages, showing header only on first
- Remove borders from assistant and user message bubbles
