nested_pages: Katalogtiefe 1 durchgesetzt, layout:-dir validiert, move raeumt geleerte Verzeichnisse - die drei #57-Seiten hochgezogen (schliesst #57)

Files changed:
- CHANGES.md
- VERSION
- kb/CONTRACT.md
- kb/entities/projects/kfchou/wiki-skills.md
- kb/entities/projects/llm-wiki-skills.md
- kb/entities/projects/vanillaflava/wiki-skills-vanillaflava.md
- kb/entities/projects/wiki-skills-vanillaflava.md
- kb/entities/projects/wiki-skills.md
- kb/entities/projects/yugasun/llm-wiki-skills.md
- kb/log.md
- tools/CONTRACT.md
- tools/chemenu/commands/index_build.py
- tools/chemenu/commands/page_ops.py
- tools/chemenu/kb_scan.py
- tools/chemenu/lint_core.py
- tools/chemenu/tests/test_index_build.py
- tools/chemenu/tests/test_kb_scan.py
- tools/chemenu/tests/test_lint.py
- tools/chemenu/tests/test_page_ops.py
- tools/chemenu/tests/test_type_resolver.py
- tools/chemenu/type_resolver.py

tools/chemenu/commands/index_build.py

@@ -28,7 +28,7 @@ from chemenu import config
 from chemenu.commands._util import rel_path, success
 from chemenu.kb_collections import iter_kb_collections
 from chemenu.page import Page
-from chemenu.kb_scan import GENERATED_INDEX, load_kb_pages
+from chemenu.kb_scan import GENERATED_INDEX, find_nested_pages, load_kb_pages
 from chemenu.type_resolver import resolver
 
 app = typer.Typer(help="Manage the generated wiki catalog (kb/index.md + per-collection INDEX.md).")
@@ -302,6 +302,17 @@ def index_rebuild(
         False, "--dry-run", help="Print what would be written instead of writing it"
     ),
 ):
+    # Reported, not refused (#57 decision): a nested page still gets a catalog
+    # written for it, just a wrong one (folded into its area, no distinct
+    # location of its own) - `wikitool lint`'s `nested_pages` is the hard
+    # finding this warning previews.
+    for title, page, depth in find_nested_pages(config.KB_DIR, load_kb_pages(config.KB_DIR)):
+        typer.echo(
+            f"WARNING: [[{title}]] is {depth} directories below its collection "
+            f"({rel_path(page.path.parent)}) - the catalog folds it into the area silently. "
+            "See `wikitool lint`'s Nested Pages finding."
+        )
+
     plan = plan_index(config.KB_DIR)
     stale = stale_shards(config.KB_DIR, plan)
 

tools/chemenu/commands/page_ops.py

@@ -381,6 +381,24 @@ def rm_command(
     )
 
 
+def _rmdir_if_emptied(directory: Path) -> bool:
+    """Remove `directory` if the move that just vacated it left it empty.
+
+    Symmetric with the `target_dir.mkdir(parents=True, exist_ok=True)` a move
+    does on the way in: without this, a hand-nested directory (#57) survives
+    its own fix, and a directory-shape test would still find it after every
+    page under it moved out. Never touches `kb/` itself, and only ever a
+    directory this move just emptied - never a pre-existing empty one it
+    happens to pass through.
+    """
+    if directory.resolve() == config.KB_DIR.resolve():
+        return False
+    if not directory.is_dir() or any(directory.iterdir()):
+        return False
+    directory.rmdir()
+    return True
+
+
 def move_command(
     page_title: Optional[str] = typer.Option(
         None, "--page", help="Exact title of the page to move to its computed location"
@@ -431,7 +449,9 @@ def move_command(
 
         moved: list[str] = []
         failed: list[str] = list(collisions)
+        removed_dirs = 0
         for title, page, target_dir, new_path in planned:
+            old_dir = page.path.parent
             try:
                 target_dir.mkdir(parents=True, exist_ok=True)
                 page.path.rename(new_path)
@@ -440,13 +460,17 @@ def move_command(
                 continue
             moved.append(title)
             typer.echo(f"  moved '{title}' -> {rel_path(new_path)}")
+            if _rmdir_if_emptied(old_dir):
+                removed_dirs += 1
+                typer.echo(f"  removed empty {rel_path(old_dir)}")
 
         if failed:
             fail(
                 f"Moved {len(moved)}/{len(candidates)} page(s) before a failure: {', '.join(failed)}. "
                 "Safe to retry - `move --reconcile` only re-moves what is still misplaced."
             )
-        success(f"Moved {len(moved)} page(s). Run `wikitool index rebuild` next.")
+        removed_note = f", removed {removed_dirs} emptied dir(s)" if removed_dirs else ""
+        success(f"Moved {len(moved)} page(s){removed_note}. Run `wikitool index rebuild` next.")
         return
 
     target = pages.get(page_title)
@@ -473,6 +497,10 @@ def move_command(
         typer.echo(f"[dry-run] would move {rel_path(target.path)} -> {rel_path(new_path)}")
         return
 
+    old_dir = target.path.parent
     target_dir.mkdir(parents=True, exist_ok=True)
     target.path.rename(new_path)
-    success(f"Moved '{page_title}' -> {rel_path(new_path)}. Run `wikitool index rebuild` next.")
+    removed_note = ""
+    if _rmdir_if_emptied(old_dir):
+        removed_note = f" Removed emptied {rel_path(old_dir)}."
+    success(f"Moved '{page_title}' -> {rel_path(new_path)}.{removed_note} Run `wikitool index rebuild` next.")