Implement Azure login management page and rename Admin Index to Settings

[Copilot]

Adds a new Azure login credential distribution system where users can claim login entries from a JSON file, and renames the admin panel's Index page to Settings.

Changes

Azure Login Management (/AzureLogin)

• Created LoginService with thread-safe JSON file operations for managing login entries
• Users claim credentials by entering their name; first available entry is assigned and marked claimed
• UI displays all entries with status (Available/Claimed), hides passwords for claimed entries
• Shows credentials once after claiming with warning to save

Admin Panel Restructure

• Renamed Admin/Index → Admin/Settings
• Index() action now redirects to Settings() for backward compatibility
• Updated all internal redirects and navigation labels

Data Structure

[
  {
    "loginEmail": "user1@example.com",
    "loginPassword": "Password123!",
    "claimedBy": "John Doe"
  }
]

Backend

• LoginEntry model with JSON property name attributes
• ILoginService interface and LoginService implementation with SemaphoreSlim for concurrency
• Service registered in DI container

Screenshots

Azure Login - Initial State:

After Claiming Credentials:

Admin Settings Page:

Original prompt

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This section details on the original issue you should resolve

<issue_title>azurelogin list page</issue_title>
<issue_description>move current index.cshtml's page to a new page called settings. also create a new page called azurelogin to allow user to get a login entry. the login entry is read from a login.json file. it contains loginemail, loginpassword, and claimedby. on the azurelogin page, user needs to enter a claimedby value (just a name), then one login entry will be assigned and should not be used again. list all existing entries i nthe azurelogin page for claimed entries. just edit/same values in the json directly</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes azurelogin list page #100

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