[3.0.0] [iOS / iPadOS / macOS / watchOS 26] Adopt New Apple Design Language

Apple unveiled a new design language across all its platforms during WWDC 2025, focusing on elegance, clarity, and visual cohesion. To maintain a native and modern look and feel, Budget Flow should adopt this design language in its next major release.

This includes:

• Updated typography, iconography, and layout conventions

• Refined animations and transitions

• Modernized color schemes and material effects

• Consistent component styling matching

Compatibility Notes:

• The new design should target devices running OS version 26 and later

• Older OS versions should retain the current UI to ensure backward compatibility and stable performance