Expose MongooseStudioChartColors to dashboard evaluation and centralize palette

[vkarpov15]

Motivation

• Centralize the chart color palette and ensure MongooseStudioChartColors is available in both the chat script sandbox and the dashboard evaluation VM so chart-producing scripts behave the same in both contexts.

Description

• Add backend/constants/mongooseStudioChartColors.js which exports the shared array of palette hex codes.
• Import and use the shared MongooseStudioChartColors in the chat script sandbox at backend/actions/ChatMessage/executeScript.js.
• Expose MongooseStudioChartColors in the dashboard evaluation VM context in backend/db/dashboardSchema.js so dashboard code can reference it directly.
• Add a test in test/Dashboard.evaluate.objectid.test.js that asserts MongooseStudioChartColors is present in the dashboard sandbox.

Testing

• Ran npx eslint against the modified files which completed without lint errors.
• Attempted npx mocha test/Dashboard.evaluate.objectid.test.js under a CI-like environment where mongodb-memory-server tried to download a MongoDB binary and the download returned HTTP 403, causing the test run to fail in this environment.
• Running the tests locally in this environment without a reachable MongoDB instance resulted in ECONNREFUSED, so full test verification requires either network access for mongodb-memory-server or a local/available MongoDB binary.

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Codex Task

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Project	Deployment	Actions	Updated (UTC)
studio	Ready	Preview, Comment	Mar 22, 2026 2:44pm

[chatgpt-codex-connector]

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[Copilot]

Pull request overview

This PR centralizes the chart color palette and makes MongooseStudioChartColors consistently available in both the chat script VM and the dashboard evaluation VM, so chart-producing scripts behave the same across execution contexts.

Changes:

• Added a shared backend constant backend/constants/mongooseStudioChartColors.js for the palette.
• Updated the chat script sandbox and dashboard evaluation VM to expose MongooseStudioChartColors.
• Added a test asserting MongooseStudioChartColors is present in the dashboard evaluation sandbox.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
backend/constants/mongooseStudioChartColors.js	Introduces the centralized chart color palette constant.
backend/actions/ChatMessage/executeScript.js	Replaces the inline palette with the centralized constant in the chat VM sandbox.
backend/db/dashboardSchema.js	Injects MongooseStudioChartColors into the dashboard evaluation VM context.
test/Dashboard.evaluate.objectid.test.js	Adds coverage that the dashboard sandbox exposes MongooseStudioChartColors.

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