feat: add copy and download actions for generated README output

[naheel0]

Closes #161

Adds a Download button next to the existing Copy action in the generated README output card.

Changes

• New \Download\ button in \MarkdownPreview\ header that exports the generated markdown as \README.md.
• Works in both Preview and Code output states (exports raw markdown).
• Existing Copy action and Preview/Code toggle unchanged.

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Project	Deployment	Actions	Updated (UTC)
readme-gen-ai	Ready	Preview	Aug 8, 2026 4:27pm

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: a00329d6-adc0-4c64-9e28-d35da786beef

📥 Commits

Reviewing files that changed from the base of the PR and between b610cd7 and fd9cfd6.

📒 Files selected for processing (1)

• src/components/Generator/MarkdownPreview.tsx

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📝 Walkthrough

Summary by CodeRabbit

• New Features
  • Added a Download button to Markdown previews.
  • Users can now save the current Markdown content as a README.md file.
  • Retained the existing Copy functionality alongside the new download option.

Walkthrough

MarkdownPreview adds a Download button that saves the current Markdown content as README.md. The component creates and cleans up a temporary object URL while retaining the existing Copy action.

Changes

Markdown download

Layer / File(s)	Summary
Download action and UI wiring src/components/Generator/MarkdownPreview.tsx	The component imports the Download icon, creates a UTF-8 Markdown Blob, triggers a README.md download, revokes the temporary object URL, and renders the Download button beside Copy.

Estimated code review effort: 2 (Simple) | ~10 minutes

Sequence Diagram(s)

sequenceDiagram
  actor User
  participant MarkdownPreview
  participant BrowserDownloadAPI
  User->>MarkdownPreview: Click Download
  MarkdownPreview->>BrowserDownloadAPI: Create Blob from current content
  MarkdownPreview->>BrowserDownloadAPI: Trigger README.md download
  MarkdownPreview->>BrowserDownloadAPI: Revoke temporary object URL

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Possibly related PRs

• BeyteFlow/ReadmeGenAI#17: Introduced the MarkdownPreview component extended by this download action.

Suggested labels: area: frontend

Suggested reviewers: adithyanmkd

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the addition of copy and download actions for generated README output.
Description check	✅ Passed	The description directly explains the Download button, README.md export, supported output states, and preserved actions.
Linked Issues check	✅ Passed	The changes satisfy issue #161 by adding README.md download support while preserving Copy and supporting Preview and Code states.
Out of Scope Changes check	✅ Passed	The changes are limited to the requested Markdown download action and related UI updates in MarkdownPreview.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/161-copy-download-actions

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