Replace ProblemDetails with AppProblemDetails in bit Boilerplate (#11436)

[ysmoradi]

closes #11436

Summary by CodeRabbit

• New Features
  • Standardized API error responses to return consistent, richer problem details in JSON.
• Refactor
  • Unified error serialization path for more reliable and predictable responses across authentication failures and exceptions.
• Chores
  • Streamlined JSON serialization context by removing unused types, reducing overhead.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Replaces ProblemDetails serialization with AppProblemDetails in the server exception handler. Updates the JSON source-generation context by removing ProblemDetails from JsonSerializable types. Control flow for status codes, auth redirect, and exception handling remains unchanged.

Changes

Cohort / File(s)	Summary of Changes
Exception handling serialization update .../Server/Boilerplate.Server.Api/Services/ServerExceptionHandler.cs	Switched response serialization to write AppProblemDetails via WriteAsJsonAsync; preserved existing status code handling, auth redirect logic, and exception flow.
JSON context adjustments .../Server/Boilerplate.Server.Api/Services/ServerJsonContext.cs	Removed JsonSerializable attribute for ProblemDetails from source-generated JSON context; minor non-functional header change.

Sequence Diagram(s)

sequenceDiagram
    autonumber
    participant Client
    participant API as Server API
    participant EH as ServerExceptionHandler
    participant JSON as JSON Serializer

    Client->>API: HTTP request
    API->>EH: Exception thrown
    EH->>EH: Map exception to status code
    alt Authentication failure
        EH->>Client: Redirect to auth
    else Other errors
        EH->>EH: Create AppProblemDetails
        EH->>JSON: WriteAsJsonAsync(AppProblemDetails)
        JSON-->>Client: HTTP response (JSON, status code)
    end

    note over EH,JSON: Changed: ProblemDetails -> AppProblemDetails payload type

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Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I twitch my whiskers at tidy tales,
Problem turns to App—no failing trails.
JSON hums a softer tune,
Server sings in stable rune.
With hops of joy, I ship the fix—
A nibble of code, no rabbit tricks.

✨ Finishing touches

• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

Knowledge base: Disabled due to Reviews -> Disable Knowledge Base setting

📥 Commits

Reviewing files that changed from the base of the PR and between 4d01c9b and 72f9b4a.

📒 Files selected for processing (2)

• src/Templates/Boilerplate/Bit.Boilerplate/src/Server/Boilerplate.Server.Api/Services/ServerExceptionHandler.cs (1 hunks)
• src/Templates/Boilerplate/Bit.Boilerplate/src/Server/Boilerplate.Server.Api/Services/ServerJsonContext.cs (1 hunks)

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