Normalize data structure by removing dots when merging defaults and frontmatter

[giuscris]

This pull request introduces improvements to how nested data structures are handled in page content and configuration files by ensuring that "dotted" keys are properly expanded into nested arrays. The changes primarily focus on using the Arr::undot() utility to convert flattened arrays into nested ones, which helps maintain correct data structure throughout the application. Additionally, the logic for merging data arrays has been updated to use array_replace_recursive for more robust handling of nested values.

Improvements to nested data handling:

• formwork/src/Pages/ContentFile.php: Now uses Arr::undot() to convert dotted keys in frontmatter to nested arrays when loading content files, ensuring correct data structure. [1] [2]
• formwork/src/Pages/Page.php: Returns undotted (nested) defaults in the defaults() method by applying Arr::undot().

Enhancements to array merging logic:

• formwork/src/Pages/Page.php: Uses array_replace_recursive instead of array spread for merging defaults and content file frontmatter into the page data, which improves handling of nested arrays and prevents overwriting nested values. [1] [2]

[Copilot]

Pull Request Overview

This PR improves how nested data structures are handled in page content and configuration by expanding dotted keys into proper nested arrays and switching to recursive array merging for more robust handling of nested values.

Key Changes

• Applies Arr::undot() to frontmatter and defaults to convert dotted keys (e.g., metadata.title) into nested arrays (e.g., ['metadata' => ['title' => ...]])
• Replaces array spread operator with array_replace_recursive() for merging data, which preserves nested values that aren't explicitly overridden

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
formwork/src/Pages/ContentFile.php	Adds Arr::undot() to convert dotted keys in YAML frontmatter to nested arrays
formwork/src/Pages/Page.php	Updates data merging to use array_replace_recursive() and applies Arr::undot() to defaults for consistent nested structure handling

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