feat(agent): add dynamic RTL language support to chat components

[Abdullah Madoun (AbdullahMadoun)]

Comprehensive RTL Language Support in Chat UI

This pull request implements dynamic Right-to-Left (RTL) language rendering support (Arabic, Hebrew, Farsi, etc.) across the Chat UI, covering both the full-page Dashboard/Command Chat and the Sidebar Extension Panel Chat.

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🛠️ Changes Included

1. Unified Message Alignment (User & Assistant)

• message.tsx:
  • Added text-start to the base <MessageContent> wrapper to ensure dynamic directionality is preserved for user bubbles.
  • Applied CSS standard classes [unicode-bidi:plaintext] and [&_*]:text-start selectors to <Streamdown>. Every paragraph in assistant responses aligns dynamically to the right for RTL and left LTR, while keeping code blocks LTR.

2. Sidebar Chat Input & Composer

• ChatInput.tsx:
  • Added dir="auto" and text-start to the sidebar <textarea> input composer.

3. Dashboard Chat Input & Composer

• ConversationInput.tsx:
  • Added dir="auto" and text-start to the dashboard <Textarea> composer.

4. Dashboard User Message pre-block

• ConversationMessage.tsx:
  • Applied dir="auto" and text-start to user prompt <pre> rendering.

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🧪 Verification & Build Status

• TypeScript Verification: bun run typecheck passed successfully!
• Asset Bundling: bun run build:agent:dev successfully compiled extension dev assets.
• Biome Check: Cleanly formatted and auto-sorted Tailwind classes to pass all repository validation checks.

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[Abdullah Madoun (AbdullahMadoun)]

I have read the CLA Document and I hereby sign the CLA