feat: DH-20954: MCP status bar toggle

[bmingles]

DH-20954: MCP status bar item can now toggle mcp server setting and will stop / start the MCP server accordingly. Easier to see status now for whether a workspace has the server running.

Testing

• MCP status bar item should open quick pick menu
• If already enabled, quick pick shows option to disable + one to copy the server url
• If already disabled, shows option to enable
• Command palette also has a > Deephaven: Toggle MCP Server command now
• Toggling should update workspace level setting deephaven.mcp.enabled

[github-actions]

No docs changes detected for 19711c5

[github-actions]

End-to-end Test Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
3	3	0	0	0	0	0	16:48:47

A ctrf plugin

Failed Test Summary

No failed tests ✨

[github-actions]

Unit Test Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
568	568	0	0	0	0	0	00:00:00

A ctrf plugin

Failed Test Summary

No failed tests ✨

[Copilot]

Pull request overview

This PR enhances MCP server usability by allowing users to toggle the workspace-level MCP setting and manage the server directly from a status bar item and new commands. It wires configuration updates to start/stop behavior and adds a quick pick UI for enabling/disabling and copying the server URL.

Changes:

• Extend IConfigService and ConfigService with a toggleMcp helper that flips or sets deephaven.mcp.enabled at workspace scope.
• Update McpController to register new commands, drive the status bar via a management quick pick instead of direct copy, and reflect enabled/disabled state in the status bar.
• Register new showMcpQuickPick and toggleMcp commands in commands.ts and package.json, including command palette entries and configuration contributions.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/types/serviceTypes.d.ts	Adds toggleMcp to IConfigService so controllers can trigger MCP enable/disable via the config service.
src/services/ConfigService.ts	Implements toggleMcp to update deephaven.mcp.enabled in workspace scope and exposes it via ConfigService.
src/controllers/McpController.ts	Registers TOGGLE_MCP_CMD and SHOW_MCP_QUICK_PICK_CMD, adds a quick pick for enable/disable/copy actions, and updates the MCP status bar to show port or “Disabled” and launch the quick pick.
src/common/commands.ts	Defines the new SHOW_MCP_QUICK_PICK_CMD and TOGGLE_MCP_CMD command IDs used by the controller and manifest.
package.json	Contributes the new MCP management commands (including the Deephaven: Toggle MCP Server palette entry) and wires them into the commandPalette menu conditions.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.