fix: dist export erzeugt die TOC-Region nach dem Marker-Strip neu (CI-Fund im Export-Replay)

Files changed:
- CHANGES.md
- VERSION
- tools/chemenu/commands/dist_cmd.py
- tools/chemenu/tests/test_dist_cmd.py

tools/chemenu/commands/dist_cmd.py

@@ -45,7 +45,16 @@ from typing import Callable, NamedTuple, Optional, Union
 
 import typer
 
-from chemenu import config, conventions, kb_collections, kb_state, ownership, version as version_mod
+from chemenu import (
+    blocks,
+    config,
+    conventions,
+    kb_collections,
+    kb_state,
+    ownership,
+    toc,
+    version as version_mod,
+)
 from chemenu.commands._util import console, fail, rel_path, success, today_iso
 
 app = typer.Typer(help="Build a distributable copy of the wiki machinery.")
@@ -213,7 +222,18 @@ def _read_planned_file(path: Path, label: str) -> PlannedFile:
     if path.suffix != ".md":
         return PlannedFile(text, executable)
     _validate_markers(text, label)
-    return PlannedFile(strip_markers(text), executable)
+    stripped = strip_markers(text)
+    # A table-of-contents region describes the file it sits in, and stripping
+    # just changed that file: `AGENTS.md`'s marked block wraps the whole
+    # `## Developing this stack` section, so the shipped copy has one heading
+    # fewer than the working tree's TOC lists. Regenerating here - after the
+    # strip, on the text that actually ships - is what keeps a fresh
+    # instance's own `docs verify` green on the very first run. A file with
+    # no region, or one the strip pushed under the threshold, is handled by
+    # `toc.upsert` itself.
+    if blocks.find(stripped, toc.REGION_NAME) is not None:
+        stripped = toc.upsert(stripped)
+    return PlannedFile(stripped, executable)
 
 
 def _copy_tree(