feat(lsp): add list.removeCheckbox and link.catUrl commands

removeCheckbox strips the `[ ]` marker (plus its trailing space) from
the current item or every item in the list. catUrl returns the
`file://` URL of the current page's HTML export, mirroring vimwiki's
:VimwikiCatUrl.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

crates/nuwiki-lsp/src/commands.rs

@@ -68,9 +68,11 @@ pub const COMMANDS: &[&str] = &[
     "nuwiki.link.pasteWikilink",
     "nuwiki.link.pasteUrl",
     "nuwiki.list.removeDone",
+    "nuwiki.list.removeCheckbox",
     "nuwiki.list.renumber",
     "nuwiki.list.changeSymbol",
     "nuwiki.list.changeLevel",
+    "nuwiki.link.catUrl",
     "nuwiki.table.insert",
     "nuwiki.table.align",
     "nuwiki.table.moveColumn",
@@ -183,6 +185,10 @@ pub(crate) async fn execute(
         "nuwiki.list.removeDone" => {
             list_remove_done(backend, args).map(|o| o.map(CommandOutcome::Edit))
         }
+        "nuwiki.list.removeCheckbox" => {
+            list_remove_checkbox(backend, args).map(|o| o.map(CommandOutcome::Edit))
+        }
+        "nuwiki.link.catUrl" => link_cat_url(backend, args).map(|o| o.map(CommandOutcome::Value)),
         "nuwiki.list.renumber" => list_renumber(backend, args).map(|o| o.map(CommandOutcome::Edit)),
         "nuwiki.list.changeSymbol" => {
             list_change_symbol(backend, args).map(|o| o.map(CommandOutcome::Edit))
@@ -854,6 +860,55 @@ fn list_remove_done(backend: &Backend, args: Vec<Value>) -> Result<Option<Worksp
     ))
 }
 
+fn list_remove_checkbox(
+    backend: &Backend,
+    args: Vec<Value>,
+) -> Result<Option<WorkspaceEdit>, String> {
+    #[derive(Deserialize)]
+    struct Args {
+        uri: Url,
+        position: LspPosition,
+        #[serde(default)]
+        whole_list: bool,
+    }
+    let raw = args
+        .into_iter()
+        .next()
+        .ok_or_else(|| "missing { uri, position } argument".to_string())?;
+    let parsed: Args = serde_json::from_value(raw).map_err(|e| format!("invalid args: {e}"))?;
+    let doc = match backend.documents.get(&parsed.uri) {
+        Some(d) => d,
+        None => return Ok(None),
+    };
+    let utf8 = backend.use_utf8.load(Ordering::Relaxed);
+    let (line, _) = nav::lsp_to_byte_pos(parsed.position, &doc.text, utf8);
+    Ok(ops::remove_checkbox_edit(
+        &doc.text,
+        &doc.ast,
+        &parsed.uri,
+        line,
+        parsed.whole_list,
+        utf8,
+    ))
+}
+
+/// Compute the `file://` URL of the current page's HTML export, returned
+/// to the client. Mirrors vimwiki's `VimwikiCatUrl`, which echoes
+/// `file://<html-export-path>` for the current file.
+fn link_cat_url(backend: &Backend, args: Vec<Value>) -> Result<Option<Value>, String> {
+    let p = parse_uri_arg(args)?;
+    let Some(wiki) = backend.wiki_for_uri(&p.uri) else {
+        return Ok(None);
+    };
+    let cfg = &wiki.config;
+    let name = crate::index::page_name_from_uri(&p.uri, Some(&cfg.root));
+    let out_path = crate::export::output_path_for(&cfg.html, &name);
+    let url = Url::from_file_path(&out_path)
+        .map(|u| u.to_string())
+        .unwrap_or_else(|_| format!("file://{}", out_path.display()));
+    Ok(Some(Value::from(url)))
+}
+
 fn list_renumber(backend: &Backend, args: Vec<Value>) -> Result<Option<WorkspaceEdit>, String> {
     #[derive(Deserialize)]
     struct Args {
@@ -2161,6 +2216,70 @@ pub mod ops {
         Some(b.build())
     }
 
+    /// Strip the `[ ]` checkbox (plus a single trailing space) from the
+    /// item at `line`, or from every item in the list when `whole_list`
+    /// is set. Leaves the marker and content intact — only the checkbox
+    /// disappears.
+    pub fn remove_checkbox_edit(
+        text: &str,
+        ast: &DocumentNode,
+        uri: &Url,
+        line: u32,
+        whole_list: bool,
+        utf8: bool,
+    ) -> Option<WorkspaceEdit> {
+        let mut spans: Vec<Span> = Vec::new();
+        if whole_list {
+            let list = find_list_at_line(ast, line)?;
+            collect_checkbox_spans(list, text, &mut spans);
+        } else {
+            let item = find_list_item_at(ast, line, 0)?;
+            if let Some(s) = remove_checkbox_span(text, item.span) {
+                spans.push(s);
+            }
+        }
+        if spans.is_empty() {
+            return None;
+        }
+        let mut b = WorkspaceEditBuilder::new();
+        for span in spans {
+            b.edit(uri.clone(), text_edit_delete(span, text, utf8));
+        }
+        Some(b.build())
+    }
+
+    fn collect_checkbox_spans(list: &ListNode, text: &str, spans: &mut Vec<Span>) {
+        for item in &list.items {
+            if let Some(s) = remove_checkbox_span(text, item.span) {
+                spans.push(s);
+            }
+            if let Some(sub) = &item.sublist {
+                collect_checkbox_spans(sub, text, spans);
+            }
+        }
+    }
+
+    /// Span of the `[ ]` checkbox plus one trailing space (so removal
+    /// leaves `* foo`, not `*  foo`). `None` when the item has no checkbox.
+    fn remove_checkbox_span(text: &str, item_span: Span) -> Option<Span> {
+        let cb = find_checkbox_span(text, item_span)?;
+        let bytes = text.as_bytes();
+        let mut end_off = cb.end.offset;
+        let mut end_col = cb.end.column;
+        if end_off < bytes.len() && bytes[end_off] == b' ' {
+            end_off += 1;
+            end_col += 1;
+        }
+        Some(Span::new(
+            cb.start,
+            AstPosition {
+                line: cb.end.line,
+                column: end_col,
+                offset: end_off,
+            },
+        ))
+    }
+
     /// Find the top-level (contiguous) list block whose span contains
     /// `line`. Unlike [`find_list_at_line`], this does not descend into
     /// sublists — it returns the outermost list so callers operate on the

crates/nuwiki-lsp/tests/commands_links.rs

@@ -28,7 +28,11 @@ fn parse(src: &str) -> nuwiki_core::ast::DocumentNode {
 #[test]
 fn commands_list_advertises_link_helpers() {
     let names: Vec<&str> = nuwiki_lsp::commands::COMMANDS.to_vec();
-    for name in ["nuwiki.link.pasteWikilink", "nuwiki.link.pasteUrl"] {
+    for name in [
+        "nuwiki.link.pasteWikilink",
+        "nuwiki.link.pasteUrl",
+        "nuwiki.link.catUrl",
+    ] {
         assert!(names.contains(&name), "missing: {name}");
     }
 }

crates/nuwiki-lsp/tests/commands_lists.rs

@@ -192,6 +192,41 @@ fn change_symbol_whole_list_rewrites_every_item() {
     assert!(texts.contains(&"3."));
 }
 
+// ===== removeCheckbox =====
+
+#[test]
+fn remove_checkbox_strips_single_item() {
+    let src = "- [ ] task\n- [X] done\n";
+    let ast = parse(src);
+    let edit = ops::remove_checkbox_edit(src, &ast, &uri(), 0, false, true).expect("edit");
+    let edits = &edit.changes.unwrap()[&uri()];
+    assert_eq!(edits.len(), 1);
+    assert_eq!(edits[0].new_text, "");
+    // Removes `[ ] ` — columns 2..6 on the first line.
+    assert_eq!(edits[0].range.start.line, 0);
+    assert_eq!(edits[0].range.start.character, 2);
+    assert_eq!(edits[0].range.end.character, 6);
+}
+
+#[test]
+fn remove_checkbox_whole_list_strips_every_item() {
+    let src = "- [ ] a\n- [X] b\n- [-] c\n";
+    let ast = parse(src);
+    let edit = ops::remove_checkbox_edit(src, &ast, &uri(), 0, true, true).expect("edit");
+    let edits = &edit.changes.unwrap()[&uri()];
+    assert_eq!(edits.len(), 3);
+    for e in edits {
+        assert_eq!(e.new_text, "");
+    }
+}
+
+#[test]
+fn remove_checkbox_none_without_checkbox() {
+    let src = "- plain item\n";
+    let ast = parse(src);
+    assert!(ops::remove_checkbox_edit(src, &ast, &uri(), 0, false, true).is_none());
+}
+
 // ===== changeLevel =====
 
 #[test]
@@ -231,6 +266,7 @@ fn commands_list_includes_cluster_a() {
     let names: Vec<&str> = nuwiki_lsp::commands::COMMANDS.to_vec();
     for name in [
         "nuwiki.list.removeDone",
+        "nuwiki.list.removeCheckbox",
         "nuwiki.list.renumber",
         "nuwiki.list.changeSymbol",
         "nuwiki.list.changeLevel",