Add default API URL fallback (vertex app)

[Codebmk]

Summary of Changes (What does this PR do?)

• Introduce getDefaultApiUrl() in envConstants to provide environment-aware default API endpoints (production, staging, localhost). Change getApiBaseUrl() to fall back to this default instead of throwing when NEXT_PUBLIC_API_URL is missing. Update vertex.config to import and use getDefaultApiUrl() for api.baseUrl and publicMeasurementsBaseUrl, ensuring the app has sensible defaults across environments.

Status of maturity (all need to be checked before merging):

• I've tested this locally
• I consider this code done
• This change ready to hit production in its current state
• The title of the PR states what changed and the related issues number (used for the release note).
• I've included issue number in the "Closes #ISSUE-NUMBER" part of the "What are the relevant tickets?" section to link the issue.
• I've updated corresponding documentation for the changes in this PR.
• I have written unit and/or e2e tests for my change(s).

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Summary by CodeRabbit

• Bug Fixes
  • Application now gracefully handles missing API configuration by automatically selecting appropriate defaults based on the current environment.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c4d8830b-2741-4e86-a645-2fbd0ecd7c55

📥 Commits

Reviewing files that changed from the base of the PR and between dc61993 and 755d22d.

📒 Files selected for processing (2)

• src/vertex/lib/envConstants.ts
• src/vertex/vertex.config.ts

📝 Walkthrough

Walkthrough

API URL resolution now respects environment variables (NEXT_PUBLIC_API_URL, NEXT_PUBLIC_API_BASE_URL) with environment-aware fallbacks (production/staging/localhost) instead of hardcoded defaults or throwing errors.

Changes

Environment-based API URL Configuration

Layer / File(s)	Summary
Default API URL fallback logic src/vertex/lib/envConstants.ts	New getDefaultApiUrl() function selects an API base URL by environment. Updated getApiBaseUrl() reads NEXT_PUBLIC_API_URL with fallback to the new helper, eliminating the previous error-throwing behavior when the env var is absent.
Config integration with environment-aware URLs src/vertex/vertex.config.ts	Vertex configuration imports getDefaultApiUrl and derives both api.baseUrl and api.publicMeasurementsBaseUrl from environment variables, falling back to the environment-aware helper instead of a hardcoded production URL.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🌍 From hardcoded URLs to the sky so blue,
Environment whispers what the system should do,
Production, staging, localhost in line,
No more throwing errors—just fallbacks divine! 🚀

🚥 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	The title 'Add default API URL fallback (vertex app)' directly and clearly summarizes the main changes: adding a default API URL fallback mechanism for the Vertex app.
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 unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ft-vertex-template

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Errors (1)

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/vertex/lib/envConstants.ts`:
- Line 23: The validateEnvironment() required-vars list is inconsistent with
getApiBaseUrl()/getDefaultApiUrl(): remove NEXT_PUBLIC_API_URL from the required
variables in validateEnvironment() so that the validator matches the runtime
fallback; update validateEnvironment() to no longer include
"NEXT_PUBLIC_API_URL" while leaving other required env names untouched and keep
getApiBaseUrl() and getDefaultApiUrl() behavior unchanged.

In `@src/vertex/vertex.config.ts`:
- Line 7: Add a type import for VertexConfigInput at the top of
src/vertex/vertex.config.ts and use it for the config variable (or remove the
explicit annotation); specifically import the exported type symbol
VertexConfigInput from ./core/config/vertex-config (e.g. using an `import type {
VertexConfigInput } from "./core/config/vertex-config"` statement) so the `const
config: VertexConfigInput = { ... }` declaration is valid.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 917bad93-f0fe-48e7-9d92-1b63e8a0e798

📥 Commits

Reviewing files that changed from the base of the PR and between 7d98273 and dc61993.

📒 Files selected for processing (2)

• src/vertex/lib/envConstants.ts
• src/vertex/vertex.config.ts

[github-actions]

New azure vertex changes available for preview here

[github-actions]

New azure vertex changes available for preview here