[FEATURE]: Align "Show All Ideas" Button With Site Theme

[ankitkr104]

Context

The Show All Ideas call-to-action on the ideas page does not follow the site's current theme language. It uses a generic neutral palette instead of the established AOSSIE brand colors used across the rest of the UI.

What Needs to Be Done

Resources

• Contribution Guide - Start Here!
• Discord Channel

Getting Started

• I have joined the Discord server and will post updates there
• I have read the Contribution Guide
• I understand this issue is assigned on a first-come, first-served basis