Fix analytics env setting

[gaspergrom]

Changes proposed ✍️

What

🤖 Generated by Copilot at 18b6612

Improve analytics and feedback integration in frontend/index.html by fixing the variable assignment logic.
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🤖 Generated by Copilot at 18b6612

No more undefined or placeholders
We need the keys to unlock our powers
segmentKey and pendoKey are the tools
To track and improve our feedback rules

Why

How

🤖 Generated by Copilot at 18b6612

• Simplify and standardize the logic for setting segmentKey and pendoKey variables for analytics and feedback (link, link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.