Description

When hovering over a clickable inlay hint (one with InlayHintLabelPart.location set), the hover highlight/underline doesn't extend to the last character of the label text. For example, if the label is → app/Livewire/UserProfile.php, the final p is not highlighted.

Steps to Reproduce

1. Create an LSP server that returns inlay hints with clickable InlayHintLabelPart labels (see code below)
2. Open a file that triggers the inlay hint
3. Hover over the inlay hint to see the clickable highlight
4. Observe that the last character is not included in the highlight

Expected Behavior

The entire label text should be highlighted when hovering, including the last character.

Actual Behavior

The highlight/underline stops one character short, leaving the final character unhighlighted.

Minimal LSP Response

The inlay hint returned by the LSP server:

{
  "position": { "line": 0, "character": 0 },
  "label": [
    {
      "value": "→ app/Livewire/UserProfile.php",
      "tooltip": "Cmd+Click to open: app/Livewire/UserProfile.php",
      "location": {
        "uri": "file:///path/to/app/Livewire/UserProfile.php",
        "range": { "start": { "line": 0, "character": 0 }, "end": { "line": 0, "character": 0 } }
      }
    }
  ],
  "kind": 1,
  "paddingLeft": false,
  "paddingRight": true
}

Rust LSP Server Code (using tower-lsp 0.20)

hints.push(InlayHint {
    position: Position { line: 0, character: 0 },
    label: InlayHintLabel::LabelParts(vec![InlayHintLabelPart {
        value: format!("→ {}", display_path),
        tooltip: Some(InlayHintLabelPartTooltip::String(
            format!("Cmd+Click to open: {}", display_path)
        )),
        location: target_uri.map(|uri| Location {
            uri,
            range: Range::default(),
        }),
        command: None,
    }]),
    kind: Some(InlayHintKind::TYPE),
    text_edits: None,
    tooltip: None,
    padding_left: Some(false),
    padding_right: Some(true),
    data: None,
});

Environment

• Zed version: v0.216.1+stable.95.81870d5cf77d61d40ec526a37141ebe3a74318ca
• OS: macOS 26.1
• Architecture: aarch64
• Memory: 64 GiB
• LSP: Custom LSP using tower-lsp 0.20, lsp-types 0.94