feat(live-cursor): live cursor during collaboration

[icecrasher321]

Summary

Live cursor during collaboration + User Avatar Stack to fetch avatar urls.

Type of Change

• New feature

Testing

Tested manually. UI issues with safari for positioning of avatar stack. But this will be moved by @emir-karabeg.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
docs	Skipped			Oct 31, 2025 2:44am

[greptile-apps]

Greptile Overview

Greptile Summary

This PR fixes a critical bug introduced in intermediate commits where environment detection variables (isProd, isDev, isTest, isHosted) were accidentally hardcoded to production values, breaking environment-specific behavior in development and test environments.

Key Changes:

• Restored dynamic environment detection using env.NODE_ENV comparisons
• Re-added getEnv import that was removed in error
• Fixed isHosted check to properly evaluate NEXT_PUBLIC_APP_URL at runtime

The final commit (c603d82) successfully reverts the problematic hardcoded values introduced in commits 1e50175 and f1f067d, restoring the correct behavior that existed before this PR's earlier commits.

Confidence Score: 5/5

• This PR is safe to merge - it fixes a critical environment detection bug
• The changes correctly restore dynamic environment variable evaluation that was accidentally hardcoded in earlier commits. The implementation properly uses the existing env and getEnv utilities, matching the original working code before the PR. No logical errors or security issues introduced.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
apps/sim/lib/environment.ts	5/5	Restored dynamic environment detection after hardcoded values were accidentally introduced in earlier commits

Sequence Diagram

sequenceDiagram
    participant App as Application Code
    participant EnvModule as environment.ts
    participant EnvUtil as env.ts (getEnv)
    participant Process as process.env
    participant Runtime as next-runtime-env
    
    Note over App,Runtime: Environment Detection Flow
    
    App->>EnvModule: Import isProd, isDev, isTest, isHosted
    EnvModule->>EnvUtil: Access env.NODE_ENV
    EnvUtil->>Runtime: runtimeEnv('NODE_ENV')
    Runtime-->>EnvUtil: value or undefined
    alt Runtime returns value
        EnvUtil-->>EnvModule: NODE_ENV value
    else Runtime returns undefined
        EnvUtil->>Process: process.env.NODE_ENV
        Process-->>EnvUtil: NODE_ENV value
        EnvUtil-->>EnvModule: NODE_ENV value
    end
    
    EnvModule->>EnvModule: Compare NODE_ENV === 'production'/'development'/'test'
    EnvModule-->>App: Boolean flags (isProd, isDev, isTest)
    
    Note over App,Runtime: Hosted Detection Flow
    
    App->>EnvModule: Check isHosted
    EnvModule->>EnvUtil: getEnv('NEXT_PUBLIC_APP_URL')
    EnvUtil->>Runtime: runtimeEnv('NEXT_PUBLIC_APP_URL')
    Runtime-->>EnvUtil: URL or undefined
    alt Runtime returns value
        EnvUtil-->>EnvModule: NEXT_PUBLIC_APP_URL
    else Runtime returns undefined
        EnvUtil->>Process: process.env.NEXT_PUBLIC_APP_URL
        Process-->>EnvUtil: NEXT_PUBLIC_APP_URL
        EnvUtil-->>EnvModule: NEXT_PUBLIC_APP_URL
    end
    
    EnvModule->>EnvModule: Compare URL with sim.ai/staging.sim.ai
    EnvModule-->>App: isHosted boolean

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