fix(parity): close the 2026-06-02 re-audit config/command findings

Implements the remaining fourth-pass findings (gap doc updated):

- list_margin: rework to upstream's buffer-side meaning. Drop the
  nuwiki-only HTML em-margin (renderer field/method + render_page_html
  param removed) and prepend max(0, list_margin) leading spaces to every
  generated bullet in build_toc_text / build_links_text /
  build_tag_links_text / diary::build_index_body; headings stay at col 0.
  From<RawWiki> derives 0 for markdown wikis when unset. Negatives can't
  resolve 'shiftwidth' server-side, so they collapse to zero indent
  (documented divergence).

- diary_months: per-wiki Vec<String> (default 12 English names), threaded
  into the diary-index month labels; missing/empty slots fall back to the
  English name.

- diary_caption_level: widen u8 -> i8 so vimwiki's -1 (min: -1) parses;
  build_index_body clamps < 0 to base tree level 0.

- VimwikiRemoveDone: regain upstream's -range. All four defs are now
  -bang -range, dispatched via remove_done(bang, range, l1, l2) in both
  clients: ! -> whole buffer, explicit range -> new list_remove_done_range
  ({range:[l1-1,l2-1]}), else current list. Server remove_done_edit gained
  an Option<(u32,u32)> range that filters whole-doc victims by start line.

markdown_header_style is deferred: the generators emit vimwiki syntax only
(caption_line never writes markdown headers), so there's no markdown header
to attach the style to. Logged as the "generated-content is vimwiki-only"
intentional divergence pending a later markdown generated-content effort.

Tests: list_margin indent, markdown list_margin-0 default, diary_months
custom + fallback, negative caption_level clamp/parse, ranged remove-done
(server + both keymap harnesses). 553 lsp/core tests pass; clippy clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/nuwiki-lsp/tests/commands_lists.rs

@@ -61,7 +61,7 @@ fn render_marker_handles_each_symbol() {
 fn remove_done_strips_done_and_rejected_items() {
     let src = "- [ ] todo\n- [X] done\n- [-] rejected\n- [ ] also todo\n";
     let ast = parse(src);
-    let edit = ops::remove_done_edit(src, &ast, &uri(), None, true).expect("edit");
+    let edit = ops::remove_done_edit(src, &ast, &uri(), None, None, true).expect("edit");
     let changes = edit.changes.expect("changes");
     let edits = &changes[&uri()];
     assert_eq!(edits.len(), 2, "expected 2 deletions");
@@ -75,14 +75,14 @@ fn remove_done_strips_done_and_rejected_items() {
 fn remove_done_leaves_open_items_alone() {
     let src = "- [ ] todo\n- [.] partial\n- [o] more\n";
     let ast = parse(src);
-    assert!(ops::remove_done_edit(src, &ast, &uri(), None, true).is_none());
+    assert!(ops::remove_done_edit(src, &ast, &uri(), None, None, true).is_none());
 }
 
 #[test]
 fn remove_done_returns_none_when_no_lists() {
     let src = "= heading =\nparagraph\n";
     let ast = parse(src);
-    assert!(ops::remove_done_edit(src, &ast, &uri(), None, true).is_none());
+    assert!(ops::remove_done_edit(src, &ast, &uri(), None, None, true).is_none());
 }
 
 #[test]
@@ -96,7 +96,7 @@ fn remove_done_scoped_by_position_to_current_list() {
         line: 0,
         character: 0,
     });
-    let edit = ops::remove_done_edit(src, &ast, &uri(), pos, true).expect("edit");
+    let edit = ops::remove_done_edit(src, &ast, &uri(), pos, None, true).expect("edit");
     let edits = &edit.changes.unwrap()[&uri()];
     assert_eq!(edits.len(), 2, "both done items in the current list match");
 }
@@ -112,7 +112,7 @@ fn remove_done_position_leaves_other_lists_untouched() {
         line: 0,
         character: 0,
     });
-    let edit = ops::remove_done_edit(src, &ast, &uri(), pos, true).expect("edit");
+    let edit = ops::remove_done_edit(src, &ast, &uri(), pos, None, true).expect("edit");
     let edits = &edit.changes.unwrap()[&uri()];
     assert_eq!(edits.len(), 1, "only the first list's done item is removed");
 }
@@ -126,11 +126,32 @@ fn remove_done_position_cascades_into_sublists() {
         line: 0,
         character: 0,
     });
-    let edit = ops::remove_done_edit(src, &ast, &uri(), pos, true).expect("edit");
+    let edit = ops::remove_done_edit(src, &ast, &uri(), pos, None, true).expect("edit");
     let edits = &edit.changes.unwrap()[&uri()];
     assert_eq!(edits.len(), 1, "the nested done child is removed");
 }
 
+#[test]
+fn remove_done_ranged_restricts_to_selected_lines() {
+    // The `:'<,'>VimwikiRemoveDone` form: a 0-indexed inclusive line range
+    // sweeps the whole doc but only deletes done/rejected items inside it.
+    // Lines: 0 `[X]`, 1 `[ ]`, 2 `[X]`, 3 `[-]`. Range 0..=1 keeps only the
+    // line-0 done item; the line-2/3 done+rejected items survive.
+    let src = "- [X] a\n- [ ] b\n- [X] c\n- [-] d\n";
+    let ast = parse(src);
+    let edit = ops::remove_done_edit(src, &ast, &uri(), None, Some((0, 1)), true).expect("edit");
+    let edits = &edit.changes.unwrap()[&uri()];
+    assert_eq!(edits.len(), 1, "only the done item on line 0 is in range");
+}
+
+#[test]
+fn remove_done_ranged_returns_none_when_range_has_no_done() {
+    // Range covering only open items → nothing to delete.
+    let src = "- [X] a\n- [ ] b\n- [ ] c\n";
+    let ast = parse(src);
+    assert!(ops::remove_done_edit(src, &ast, &uri(), None, Some((1, 2)), true).is_none());
+}
+
 // ===== renumber =====
 
 #[test]
@@ -280,6 +301,6 @@ fn commands_list_includes_cluster_a() {
 fn one_edit_text_round_trip() {
     let src = "- [X] done\n";
     let ast = parse(src);
-    let edit = ops::remove_done_edit(src, &ast, &uri(), None, true).unwrap();
+    let edit = ops::remove_done_edit(src, &ast, &uri(), None, None, true).unwrap();
     let _ = one_edit_text(edit);
 }