Deprecate @microsoft/sharepointembedded-copilotchat-react

[gnjoseph]

Summary

The @microsoft/sharepointembedded-copilotchat-react SDK is being deprecated. This PR removes every consumer of the SDK from the samples repo so the surface no longer advertises or depends on it.

What changed

Across all three samples (boilerplate-typescript-react, project-management, legal-docs):

• Deleted Copilot chat components, hooks, providers, and services
• Removed the vendored SDK copy and .tgz tarball in legal-docs
• Dropped the SDK dependency entry in each package.json (lockfiles regenerated)
• Removed Copilot-only configuration:
  • sharePointHostname, COPILOT_CONFIG, SharePoint container scopes, copilotTheme
  • The getSharePointToken helpers that only existed to bootstrap the SDK
  • Dead Vite alias / dedupe blocks that were added to load the SDK shim
• Removed UI affordances that opened the chat panel (toolbar buttons, flyout entries, resizable panels) and their dead CSS
• Deleted AI prompt recipes that targeted this SDK (contoso-audit-agent, contoso-legal-agent)

Documentation:

• Root README and Custom Apps/README no longer advertise "Copilot SDK" / "AI-assisted document review" for legal-docs
• legal-docs/README drops the Copilot integration bullet

Verification

• npm install + npm run build pass for all three samples
• Repo-wide grep confirms no remaining references to the SDK package name, ChatEmbedded* types, useCopilotSite, getSharePointToken, or COPILOT_CONFIG

[Copilot]

Pull request overview

This PR deprecates @microsoft/sharepointembedded-copilotchat-react across the samples repository by removing all Copilot chat UI/code paths, related configuration, and documentation/prompts that referenced the SDK.

Changes:

• Removed Copilot chat components/hooks/providers and all UI entry points that launched chat across the three samples.
• Deleted SDK shims/vendored artifacts and removed the SDK dependency from sample package.json files (with lockfile updates where applicable).
• Updated READMEs and removed AI prompt templates that instructed integrating the deprecated SDK.

Reviewed changes

Copilot reviewed 44 out of 47 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
README.md	Updates root sample table to remove Copilot SDK advertising for legal-docs.
Custom Apps/README.md	Updates Custom Apps table to remove Copilot SDK mention for legal-docs.
Custom Apps/project-management/src/pages/Files.tsx	Removes Copilot panel/button and resizable split-pane layout; leaves file list as sole content.
Custom Apps/project-management/src/hooks/useCopilotSite.ts	Deletes Copilot-specific site/container metadata hook.
Custom Apps/project-management/src/context/AuthContext.tsx	Removes SharePoint-token helper that only supported Copilot auth.
Custom Apps/project-management/src/config/appConfig.ts	Removes Copilot-only config (sharePointHostname, theme).
Custom Apps/project-management/src/components/CopilotChat.tsx	Deletes Copilot chat wrapper component.
Custom Apps/project-management/src/components/copilot/CopilotMobileView.tsx	Deletes Copilot mobile drawer UI.
Custom Apps/project-management/src/components/copilot/CopilotDesktopView.tsx	Deletes Copilot desktop embedded chat view.
Custom Apps/project-management/src/components/copilot/CopilotChatContainer.tsx	Deletes Copilot chat container/auth/config wiring.
Custom Apps/project-management/package.json	Removes deprecated SDK dependency.
Custom Apps/legal-docs/vite.config.ts	Removes SDK-related React alias/dedupe/optimization configuration.
Custom Apps/legal-docs/tsconfig.app.json	Removes path mapping to the local SDK shim.
Custom Apps/legal-docs/src/services/copilotChat.ts	Deletes Copilot chat service (beta retrieval + search fallback).
Custom Apps/legal-docs/src/pages/Dashboard.tsx	Removes Copilot panel wiring from the dashboard flyout layout.
Custom Apps/legal-docs/src/lib/sharepointembedded-copilotchat-react/index.tsx	Deletes local shim for the deprecated SDK.
Custom Apps/legal-docs/src/hooks/useCopilotSite.ts	Deletes Copilot site/container hook used for chat context.
Custom Apps/legal-docs/src/context/AuthContext.tsx	Removes SharePoint-scoped token helper used only for Copilot SDK.
Custom Apps/legal-docs/src/config/sharepoint.ts	Removes Copilot/SDK-specific scopes and auth/config types.
Custom Apps/legal-docs/src/config/appConfig.ts	Removes Copilot configuration and SharePoint hostname utility used for Copilot.
Custom Apps/legal-docs/src/components/panels/CopilotPanel.tsx	Deletes Copilot flyout panel component.
Custom Apps/legal-docs/src/components/FlyoutButtons.tsx	Removes Copilot panel option from flyout button set/types.
Custom Apps/legal-docs/src/components/FloatingCopilotIcon.tsx	Deletes floating Copilot launcher UI.
Custom Apps/legal-docs/src/components/CustomCopilotChat.tsx	Deletes custom (non-SDK) Copilot-style chat UI.
Custom Apps/legal-docs/src/components/CopilotChat.tsx	Deletes SDK-based Copilot chat modal/panel.
Custom Apps/legal-docs/src/components/copilot/SDKCopilotChat.tsx	Deletes SDK-based chat implementation component.
Custom Apps/legal-docs/src/components/copilot/InlineCopilotChat.tsx	Deletes inline Copilot chat implementation.
Custom Apps/legal-docs/src/components/copilot/index.ts	Deletes Copilot component barrel exports.
Custom Apps/legal-docs/src/components/copilot/CopilotErrorBoundary.tsx	Deletes Copilot-specific error boundary.
Custom Apps/legal-docs/src/components/copilot/CopilotDesktopView.tsx	Deletes Copilot desktop view with CSP/debug handling.
Custom Apps/legal-docs/src/components/copilot/CopilotChatContainer.tsx	Deletes Copilot container/auth/config wrapper.
Custom Apps/legal-docs/src/components/copilot/CopilotAuthProvider.ts	Deletes Copilot SDK auth provider implementation.
Custom Apps/legal-docs/README.md	Removes Copilot integration claims and related configuration notes.
Custom Apps/legal-docs/package.json	Removes deprecated SDK dependency (file-based tgz).
Custom Apps/boilerplate-typescript-react/react-client/src/routes/Containers.tsx	Removes ChatController side effects from container selection.
Custom Apps/boilerplate-typescript-react/react-client/src/routes/App.tsx	Removes chat sidebar UI plumbing and hidden toolbar toggle.
Custom Apps/boilerplate-typescript-react/react-client/src/routes/App.css	Removes sidebar/chat-related styling.
Custom Apps/boilerplate-typescript-react/react-client/src/providers/ChatController.ts	Deletes Copilot chat controller/provider.
Custom Apps/boilerplate-typescript-react/react-client/src/providers/ChatAuthProvider.ts	Deletes Copilot chat auth provider.
Custom Apps/boilerplate-typescript-react/react-client/src/components/ChatSidebar.tsx	Deletes chat sidebar component (stubbed/disabled UI).
Custom Apps/boilerplate-typescript-react/react-client/src/common/Scopes.ts	Removes chat/SharePoint Container.Selected scope constants.
Custom Apps/boilerplate-typescript-react/react-client/package.json	Removes deprecated SDK dependency.
Custom Apps/boilerplate-typescript-react/react-client/package-lock.json	Removes deprecated SDK entry from lockfile.
AI/prompts/contoso-legal-agent.md	Removes prompt template that instructs integrating the deprecated SDK.
AI/prompts/contoso-audit-agent.md	Removes prompt template that instructs integrating the deprecated SDK.

Files not reviewed (1)

• Custom Apps/boilerplate-typescript-react/react-client/package-lock.json: Generated file

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