feat: add Categories tab to TaxonomyView

Single-list editor for docs/categories.txt with article usage counts
scanned from frontmatter. Supports multi-select delete.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/core/taxonomy.py b/core/taxonomy.py
index 8aee0aa..e72d486 100644
--- a/core/taxonomy.py
+++ b/core/taxonomy.py
@@ -22,3 +22,11 @@ def save_taxonomy(model: TaxonomyModel, it_path: Path, en_path: Path) -> None:
     pairs = sorted(model.it_to_en.items(), key=lambda x: x[0])
     it_path.write_text("\n".join(k for k, _ in pairs) + "\n")
     en_path.write_text("\n".join(v for _, v in pairs) + "\n")
+
+def load_categories(path: Path) -> list[str]:
+    if not path.exists():
+        return []
+    return sorted(l.strip() for l in path.read_text().splitlines() if l.strip())
+
+def save_categories(path: Path, categories: list[str]) -> None:
+    path.write_text("\n".join(sorted(categories)) + "\n")