✨ Display Issues as Line Annotations In Source Editor

首先定位 DiagnosticManager、DiagnosticIssue 以及使用 CodeEditSourceEditor 的视图。跟踪当前文件的识别方式，并将其诊断信息接入传递给编辑器的 LineAnnotation 值；完成的标准是使用现有编辑器渲染，在受影响行下方显示特定于文件的注释。

Description

Use the newly created DiagnosticManager to provide file-specific diagnostics to the editor via LineAnnotations. This connection allows visual issues to appear directly in the source editor view below the affected lines.

Requirements

• Convert DiagnosticIssue instances for the current file into LineAnnotation objects:

  struct LineAnnotation: Hashable, Identifiable {
      let id: UUID = UUID()
      let line: Int
      let column: Int
      let severity: DiagnosticIssue.Severity
      let text: String
  }
  

• Extend DiagnosticManager with a helper:

  func annotations(for file: URL) -> Set<LineAnnotation>
  

• In views where CodeEditSourceEditor is used:
  • Access the current file’s annotations using the manager
  • Pass them into the editor view via:

  annotations: Set<LineAnnotation>
  

• The editor should already know how to render the annotations; this task is only concerned with wiring up the data source.

Additional Context

This connects the data produced by DiagnosticManager to line annotations introduced in CodeEditSourceEditor. This is a key step in surfacing diagnostics in a context-aware and developer-friendly way.

Later extensions might include showing annotations from multiple sources, updating annotations live from LSP, or supporting quick fixes from the underlying DiagnosticIssue.

Related Issues

• #2014 (pre-requisite)
• https://github.com/CodeEditApp/CodeEditSourceEditor/issues/297 (pre-requisite)
• #354