refactor: migrate constructor assigned inputs to signals

[spike-rabbit]

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior? (You can also link to an open issue here)

Some @Input with default assignment in the constructor are not signals yet.

What is the new behavior?

All @Input from the constructor are now signal inputs and are defaulted at initialization. The constructor is removed and related code places are adjusted.

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications:

For breaking change note refer to 4bfbf62.

Other information:

[Copilot]

Pull Request Overview

This PR migrates several properties from Angular @Input() decorators to Angular signal-based input() functions in the DatatableComponent. The migration affects rowHeight, headerHeight, footerHeight, cssClasses, and messages properties, converting them from traditional inputs to signal inputs. The constructor logic that initialized these properties from global configuration has been removed and integrated directly into the input definitions.

Key changes:

• Converted five @Input() properties to signal-based input() functions with configuration defaults
• Updated all template usages and component code to call these as functions (e.g., headerHeight() instead of headerHeight)
• Removed the constructor that was previously initializing these properties from configuration
• Updated tests to accommodate the signal-based API, including proper mocking of the messages signal

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
datatable.component.ts	Migrated five properties from @Input() to input() signals and removed constructor initialization logic
datatable.component.html	Updated all references to signal properties to use function call syntax
pager.component.ts	Changed messages getter to properly invoke the signal function and updated type annotation
pager.component.spec.ts	Updated test setup to mock messages as a signal and modified test helper to properly set signal values
footer.component.spec.ts	Added messages signal to test fixture component to maintain compatibility

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[Copilot]

Pull Request Overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

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