fix(agent-core): preserve blocked prompt hook context

[kermanx]

Related Issue

No linked issue. This fixes the prompt hook context regression found while reviewing the UserPromptSubmit block behavior.

Problem

UserPromptSubmit block results should end the current turn without immediately calling the model, but the original prompt and hook result should remain in session history and be available to later model turns. The extra blocked-prompt marker made the context behavior diverge from that model and added a wire record that is no longer needed.

What changed

• Removed the blocked-prompt context marker and restore path.
• Kept UserPromptSubmit block prompts and hook results in model projection for subsequent turns.
• Updated the focused context and turn tests to match the intended behavior.
• Removed the obsolete Vis wire metadata for the deleted marker record.
• Added a patch changeset for agent-core and the CLI bundle.

Verification

• pnpm -C packages/agent-core exec vitest run test/hooks/runner.test.ts test/hooks/engine.test.ts test/agent/context.test.ts test/agent/turn.test.ts
• pnpm --filter @moonshot-ai/agent-core run typecheck
• pnpm --filter @moonshot-ai/kimi-code run typecheck
• pnpm -C apps/vis/server exec vitest run test/lib/wire-reader.test.ts test/lib/context-projector.test.ts
• pnpm -C apps/vis/web exec vite build
• git diff --check
• pnpm --filter @moonshot-ai/vis-web run typecheck currently fails on existing baseline issues unrelated to this change, including raw asset imports from agent-core, existing full_compaction.complete field assumptions, and a pre-existing Uint8Array BlobPart typing issue.

Checklist

• I have read the CONTRIBUTING document.
• I have linked a related issue, or explained the problem above.
• I have added tests that prove my feature works.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs no doc update.

[changeset-bot]

🦋 Changeset detected

Latest commit: 66da2fb

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@moonshot-ai/agent-core	Patch
@moonshot-ai/kimi-code	Patch

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[pkg-pr-new]

pnpm dlx https://pkg.pr.new/@moonshot-ai/kimi-code@66da2fb

npx https://pkg.pr.new/@moonshot-ai/kimi-code@66da2fb

commit: 66da2fb