Migrate Standard Delta buttons to DaisyUI

[ChristianHuehn]

Feature request

Part of epic #4367

Description

As a developer, I want Standard Delta buttons to use DaisyUI with zoneless signals so that we have a modern, consistent styling approach.

Acceptance criteria

• Standard Delta buttons use DaisyUI classes instead of custom SCSS
• Standard Delta buttons work zoneless with signals
• All SCSS files related to Standard Delta buttons are removed

Assumptions & Exclusions

This is a refactoring task focused on migrating styling and reactivity approach.

Development notes (optional Task Breakdown)

• Remove SCSS dependencies
• Implement DaisyUI classes
• Convert to zoneless signals
• Test functionality

Open questions

[ChristianHuehn]

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