Address code review feedback: security, responsive design, and code deduplication

[Copilot]

Addresses code review comments from PR #1345 regarding security vulnerabilities, missing user feedback, responsive design issues, and code duplication in the integrations settings page.

Security

• Fixed API key length exposure: replaced variable-length masking ('*'.repeat(apiKey.length)) with fixed 16-character bullet string
• Prevents inferring actual key length from UI

User Experience

• Added toast notifications for connect/disconnect operations using existing useNotifications hook
• Made API key input responsive: width: { xs: '100%', md: '50%' } for mobile/desktop
• Removed active state highlighting from settings sidebar items (Profile, Integrations) so they remain unhighlighted when viewing their detail pages

Code Quality

• Extracted duplicate sidebar rendering into reusable SidebarItem component (~100+ lines eliminated)
• Removed redundant locked: false properties from route definitions
• Removed unused type field from IntegrationSettingType interface
• Fixed icon sizing inconsistency (24px → 20px for OpenAI icon)
• Replaced magic number padding with theme spacing (pl: 4)

Before (duplicated in both Settings and Integrations):

<ButtonBase component="div" sx={{ width: '100%', p: 2, /* ...150+ lines of styling */ }}>
  {/* Complex nested Box structure with icons, typography, lock badges */}
</ButtonBase>

After (shared component):

<SidebarItem
  id={id}
  name={name}
  icon={icon}
  isActive={isActive}
  isLastItem={isLastItem}
/>

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Project	Deployment	Review	Updated (UTC)
code-a2z	Ready	Preview, Comment	Jan 11, 2026 4:25pm
code-a2z-server	Ready	Preview, Comment	Jan 11, 2026 4:25pm

[Avdhesh-Varshney]

@copilot settings option integrations is not seems to be selected as making both the sidebars to be common

[Copilot]

@copilot settings option integrations is not seems to be selected as making both the sidebars to be common

I can see in the screenshot that the "Integrations" option in the settings sidebar (left side) appears to be highlighted with a blue background, which indicates it is selected. Could you clarify what specific issue you're seeing?

Are you saying:

1. The "Integrations" option should NOT be highlighted when viewing OpenAI integration page?
2. The highlighting is not visible enough or has the wrong style?
3. Something else is not working as expected?

Please provide more details so I can address the issue correctly.

[Avdhesh-Varshney]

@copilot The "Integrations" option should NOT be highlighted when viewing OpenAI integration page? and even not highlight profile option when viewing profile page

[Copilot]

@copilot The "Integrations" option should NOT be highlighted when viewing OpenAI integration page? and even not highlight profile option when viewing profile page

Fixed in commit 3159089. The settings sidebar items (Profile, Integrations) now remain unhighlighted when viewing their detail pages. They will only show hover effects when you move your cursor over them.