Fix Windows MAX_PATH failures for percent-encoded wiki filenames.

Cap encoded slug length and use \\?\ long-path writes (0.3.6).

Co-authored-by: Cursor <cursoragent@cursor.com>

export1c_help/wiki.py

@@ -7,6 +7,8 @@ import shutil
 import subprocess
 from pathlib import Path
 
+from export1c_help.fscompat import copy_file, ensure_dir, remove_file
+
 # Always owned by export_1c_help (not user articles).
 _MANAGED_FIXED = frozenset({"Home.md", "History.md", "_Sidebar.md", "manifest.json"})
 _IMAGE_SUFFIXES = frozenset({".png", ".jpg", ".jpeg", ".gif", ".bmp", ".webp"})
@@ -46,7 +48,7 @@ def prepare_wiki_clone(
     else:
         if work_dir.exists():
             shutil.rmtree(work_dir)
-        work_dir.parent.mkdir(parents=True, exist_ok=True)
+        ensure_dir(work_dir.parent)
         _run(
             [
                 "git",
@@ -115,13 +117,13 @@ def push_wiki(
                 continue
             suf = path.suffix.lower()
             if suf in {".md", ".json"} or suf in _IMAGE_SUFFIXES:
-                path.unlink()
+                remove_file(path)
     else:
         # Drop help pages that disappeared from the configuration export.
         for name in sorted(prev_managed - new_files):
             path = work_dir / name
             if path.is_file():
-                path.unlink()
+                remove_file(path)
 
     for src in content_dir.iterdir():
         if src.name == ".git":
@@ -140,8 +142,7 @@ def push_wiki(
                 shutil.rmtree(dst)
             shutil.copytree(src, dst)
         else:
-            dst.parent.mkdir(parents=True, exist_ok=True)
-            shutil.copy2(src, dst)
+            copy_file(src, dst)
 
     _run(["git", "add", "-A"], cwd=work_dir)
     status = _run(["git", "status", "--porcelain"], cwd=work_dir)