fix(api-service): In-app step redirect error

[scopsy]

What changed? Why was the change needed?

This PR resolves NV-7104, where the in-app step redirect URL target would reset and show persistent validation errors.

The issue stemmed from a combination of factors:

1. Shallow merging of default control values, which caused nested properties like redirect.target to be lost if the incoming controlValues had a partial redirect object.
2. React Hook Form's values prop not being initialized with fully merged default values, leading to resets losing nested fields.
3. The sanitizeRedirect function not consistently providing a default target when a redirect URL was present.

To address this, the following changes were made:

• Introduced a deepMergeDefaults utility to correctly merge nested default values.
• Updated EditStepTemplateV2Page to use the deeply merged defaultValues for React Hook Form's values prop.
• Added a fallback and useEffect to URLInput to ensure the target always defaults to _self if undefined.
• Modified sanitizeRedirect to explicitly set target to _self for relative URLs and _blank for absolute URLs if it's missing.

Screenshots

• Screenshot 2026-02-11 at 10.17.25.png
• CleanShot 2026-02-11 at 14.12.17.mp4

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Linear Issue: NV-7104

 

[cursor]

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[linear]

NV-7104 In-app step redirect URL target resets and shows error

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[github-actions]

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We require pull request titles to follow specific formatting rules and it looks like your proposed title needs to be adjusted.

Your PR title is: fix(api-service): In-app step redirect error

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