new rpc call to get focused block data from a tab

[sawka]

No description provided.

[coderabbitai]

Walkthrough

This pull request adds a new RPC command GetFocusedBlockData to retrieve metadata about the currently focused block. The implementation spans frontend and backend: the TypeScript frontend introduces a handler method that queries the global store for the focused block and conditionally augments the response with job status, connection status, and terminal-specific information (shell integration status and last command). The backend exposes a new interface method and struct type to support this command. Corresponding TypeScript types and client API methods are added to enable frontend-backend communication.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	No pull request description was provided by the author, making it impossible to assess relevance to the changeset.	Add a pull request description explaining the purpose, use case, and any relevant context for this new RPC call.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding a new RPC call to retrieve focused block data from a tab.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch sawka/focus-data

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