aks-plugin: Convert styled usage to sx

[illume]

Fixes #40

• aks-plugin: AzureLoginPage: Use sx instead of styled
• aks-plugin: AzureProfilePage: Use sx instead of styled
• aks-desktop: BasicsStep: Use sx instead of styled
• aks-desktop: Breadcrumb: Use sx instead of styled
• aks-desktop: FormField: Use sx instead of styled
• aks-desktop: ReviewStep: Use sx instead of styled

Testing

• Please manually review the styles look the same/ok?

[Copilot]

Pull request overview

This PR refactors Material-UI components from using the styled() API to the more modern sx prop pattern across multiple components in the aks-plugin. This modernization effort simplifies the codebase by removing the need for separate styled component definitions and class name constants.

Key Changes:

• Removed styled() API usage and replaced with inline sx prop styling
• Eliminated PREFIX and classes constants used for CSS-in-JS class generation
• Converted theme access from styled components to sx callback patterns

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
ReviewStep.tsx	Converted styled Box to regular Box with sx props; extracted section styles to reusable variables
FormField.tsx	Removed StyledInputAdornment wrapper; moved field styles directly to TextField's sx prop
Breadcrumb.tsx	Replaced styled Box with sx props; added useTheme hook for accessing theme values
BasicsStep.tsx	Removed styled Box wrapper; moved styles to sx props; fixed useEffect dependency array
AzureProfilePage.tsx	Converted all styled components to sx props; removed extensive class definitions
AzureLoginPage.tsx	Replaced styled components with sx props; extracted reusable style objects as constants

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[yolossn]

LGTM

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[sniok]

clicked around, looks good!

[skoeva]

LGTM