feat: add ChatPanel AI element

[rohanchkrabrty]

Summary

• Adds ChatPanel, a dockable/floating/minimizable window frame for chat, to packages/raystack/components/chat-panel with Header, Title, Actions, MinimizeTrigger, ExpandTrigger, Content, and Trigger parts
• The panel mounts once and morphs between docked (in-flow sidebar), floating (fixed, draggable and resizable, viewport-clamped), and minimized (corner bubble via ChatPanel.Trigger) using pure CSS — no portal or remount, so chat state survives transitions
• Supports controlled/uncontrolled mode, side, size, and floating position, with slottable header actions instead of a built-in close button
• Adds the ChatPanel docs page (demos, anatomy, props tables) under the AI Elements section and exports the component and types from the package root
• Includes a component test suite covering mode transitions, drag/resize behavior, and trigger interactions
• Stacked on feat: add Chat AI element #865 (feat-ai-chat) — review only the top commit here

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Project	Deployment	Actions	Updated (UTC)
apsara	Ready	Preview, Comment	Jul 26, 2026 9:49pm

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📥 Commits

Reviewing files that changed from the base of the PR and between 03c5439 and 4beeb72.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (30)

• apps/www/src/content/docs/ai-elements/chat-panel/demo.ts
• apps/www/src/content/docs/ai-elements/chat-panel/index.mdx
• apps/www/src/content/docs/ai-elements/chat-panel/props.ts
• apps/www/src/content/docs/ai-elements/chat/demo.ts
• apps/www/src/content/docs/ai-elements/chat/index.mdx
• apps/www/src/content/docs/ai-elements/chat/props.ts
• apps/www/src/content/docs/ai-elements/meta.json
• apps/www/src/content/docs/ai-elements/prompt-input/demo.ts
• apps/www/src/content/docs/ai-elements/prompt-input/index.mdx
• apps/www/src/content/docs/ai-elements/prompt-input/props.ts
• packages/raystack/components/chat-panel/__tests__/chat-panel.test.tsx
• packages/raystack/components/chat-panel/chat-panel-context.tsx
• packages/raystack/components/chat-panel/chat-panel-parts.tsx
• packages/raystack/components/chat-panel/chat-panel-root.tsx
• packages/raystack/components/chat-panel/chat-panel-trigger.tsx
• packages/raystack/components/chat-panel/chat-panel.module.css
• packages/raystack/components/chat-panel/chat-panel.tsx
• packages/raystack/components/chat-panel/index.tsx
• packages/raystack/components/chat/__tests__/chat.test.tsx
• packages/raystack/components/chat/chat-composer.tsx
• packages/raystack/components/chat/chat-messages.tsx
• packages/raystack/components/chat/chat.module.css
• packages/raystack/components/chat/chat.tsx
• packages/raystack/components/chat/index.tsx
• packages/raystack/components/prompt-input/__tests__/prompt-input.test.tsx
• packages/raystack/components/prompt-input/prompt-input-parts.tsx
• packages/raystack/components/prompt-input/prompt-input.module.css
• packages/raystack/components/prompt-input/prompt-input.tsx
• packages/raystack/index.tsx
• packages/raystack/package.json

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