chore(studio): Add Coding Agent Studio feature flag

[htolentino-nvidia]

https://linear.app/nvidia/issue/ASTD-177/create-a-ff-for-coding-agents-in-studio

Summary by CodeRabbit

• Chores
  • Added feature flag infrastructure to enable configuration-based control of the Coding Agent Studio feature across development and production environments.

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 4f8e160 and 777991f.

📒 Files selected for processing (5)

• services/studio/src/nmp/studio/env_mappings.py
• web/packages/studio/env/.env.dev.local.sample
• web/packages/studio/env/.env.fastapi
• web/packages/studio/src/constants/environment.ts
• web/packages/studio/src/constants/featureFlags/featureFlags.ts

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📝 Walkthrough

Walkthrough

Backend environment mapping is added to connect platform configuration to a new Vite feature flag. Frontend environment files expose the flag, which is then defined in the feature flag system and exported as a TypeScript constant for UI consumption.

Changes

Coding Agent Studio Feature Flag

Layer / File(s)	Summary
Backend environment variable mapping services/studio/src/nmp/studio/env_mappings.py	Backend maps STUDIO_UI_VITE_FF_CODING_AGENT_STUDIO_ENABLED to studio.feature_flags.coding_agent_studio_enabled configuration with a "false" default.
Frontend environment configuration web/packages/studio/env/.env.dev.local.sample, web/packages/studio/env/.env.fastapi	Development and FastAPI environment files expose VITE_FF_CODING_AGENT_STUDIO_ENABLED, reading from the backend-mapped platform configuration.
Feature flag definition web/packages/studio/src/constants/featureFlags/featureFlags.ts	Feature flag system defines codingAgentStudioEnabled in flagDefinitions, backed by the Vite environment variable with a false default.
Feature flag export web/packages/studio/src/constants/environment.ts	Exports CODING_AGENT_STUDIO_ENABLED constant derived from the feature flag, defaulting to true unless explicitly false.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	Title clearly describes the main change: adding a feature flag for Coding Agent Studio across multiple configuration files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch studio-coding-agent-feature-flag/htolentino

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[github-actions]

Suite	Lines Covered	Line Rate	Branch Rate
Unit Tests	18271/24224	75.4%	61.9%
Integration Tests	11670/23001	50.7%	25.9%