feat(cc): add AI summaries across Contact Center widgets

[fsiyavud]

COMPLETES

Issue link pending; none was supplied with this change.

This pull request addresses

Voice interaction AI summaries in the Contact Center widgets, including mid-call consult and transfer handoff and post-call wrap-up.

by making the following changes

• Adds interaction and agent scoped AI summary state in the store, with task-owned SDK event handling and stale-result rejection.
• Adds initiating and receiving agent views, consult/transfer and wrap-up summary flows, Web Component exposure, and sample-app scenarios.
• Adds unit, browser, accessibility, visual, SDK contract, package-boundary, and release-verification coverage and updates the corresponding module specs and contract docs.
• Commits the sealed local SDK package and its SHA-256 lock receipt so the root development resolution has a reproducible dependency.

Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Tooling change
• Internal code refactor

The following scenarios were tested

• The testing is done with the amplify link
• Git patch whitespace validation passed before commit.
• The committed SDK tarball SHA-256 matches design/default/sdk_package_lock.json.
• Unit, browser, style, and release gates were not run during PR preparation.

Known blocker: the sealed SDK package has a regression in which a same-conversation CONSULT request superseded by TRANSFER can remain pending indefinitely. The SDK regression test and ai-summary.md document it. SDK repair, a new sealed package, and successful release gates are required before merge.

The GAI Coding Policy And Copyright Annotation Best Practices

• GAI was not used (or, no additional notation is required)
• Code was generated entirely by GAI
• GAI was used to create a draft that was subsequently customized or modified
• Coder created a draft manually that was non-substantively modified by GAI (e.g., refactoring was performed by GAI on manually written code)
• Tool used for AI assistance (GitHub Copilot / Other - specify)
  • Github Copilot
  • Other - Codex / Artificer
• This PR is related to
  • Feature
  • Defect fix
  • Tech Debt
  • Automation

Checklist before merging

• I have not skipped any automated checks
• All existing and new tests passed
• I have updated the testing document
• I have tested the functionality with amplify link

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