feat: use .kc extension for new files, find both .kc and .FCStd

- get_cad_file_path() now generates .kc paths instead of .FCStd
- find_file_by_part_number() searches .kc first, falls back to .FCStd
- search_local_files() lists both .kc and .FCStd files

freecad/silo_commands.py

@@ -206,41 +206,45 @@ def get_projects_dir() -> Path:
 def get_cad_file_path(part_number: str, description: str = "") -> Path:
     """Generate canonical file path for a CAD file.
 
-    Path format: ~/projects/cad/{category_code}_{category_name}/{part_number}_{description}.FCStd
+    Path format: ~/projects/cad/{category_code}_{category_name}/{part_number}_{description}.kc
     """
     category, _ = parse_part_number(part_number)
     folder_name = get_category_folder_name(category)
 
     if description:
-        filename = f"{part_number}_{sanitize_filename(description)}.FCStd"
+        filename = f"{part_number}_{sanitize_filename(description)}.kc"
     else:
-        filename = f"{part_number}.FCStd"
+        filename = f"{part_number}.kc"
 
     return get_projects_dir() / "cad" / folder_name / filename
 
 
 def find_file_by_part_number(part_number: str) -> Optional[Path]:
-    """Find existing CAD file for a part number."""
+    """Find existing CAD file for a part number. Prefers .kc over .FCStd."""
     category, _ = parse_part_number(part_number)
     folder_name = get_category_folder_name(category)
     cad_dir = get_projects_dir() / "cad" / folder_name
 
-    if cad_dir.exists():
-        matches = list(cad_dir.glob(f"{part_number}*.FCStd"))
-        if matches:
-            return matches[0]
-
-    base_cad_dir = get_projects_dir() / "cad"
-    if base_cad_dir.exists():
-        for subdir in base_cad_dir.iterdir():
-            if subdir.is_dir():
-                matches = list(subdir.glob(f"{part_number}*.FCStd"))
-                if matches:
-                    return matches[0]
+    for search_dir in _search_dirs(cad_dir):
+        for ext in ("*.kc", "*.FCStd"):
+            matches = list(search_dir.glob(f"{part_number}{ext[1:]}"))
+            if matches:
+                return matches[0]
 
     return None
 
 
+def _search_dirs(category_dir: Path):
+    """Yield the category dir, then all sibling dirs under cad/."""
+    if category_dir.exists():
+        yield category_dir
+    base_cad_dir = category_dir.parent
+    if base_cad_dir.exists():
+        for subdir in base_cad_dir.iterdir():
+            if subdir.is_dir() and subdir != category_dir:
+                yield subdir
+
+
 def search_local_files(search_term: str = "", category_filter: str = "") -> list:
     """Search for CAD files in local cad directory."""
     results = []
@@ -260,7 +264,9 @@ def search_local_files(search_term: str = "", category_filter: str = "") -> list
         if category_filter and category_code.upper() != category_filter.upper():
             continue
 
-        for fcstd_file in category_dir.glob("*.FCStd"):
+        for fcstd_file in sorted(
+            list(category_dir.glob("*.kc")) + list(category_dir.glob("*.FCStd"))
+        ):
             filename = fcstd_file.stem
             parts = filename.split("_", 1)
             part_number = parts[0]
@@ -965,6 +971,65 @@ class SiloPullDialog:
         return None
 
 
+def _pull_dependencies(part_number, progress_callback=None):
+    """Recursively pull all BOM children that have files on the server.
+
+    Returns list of (part_number, dest_path) tuples for successfully pulled files.
+    Skips children that already exist locally.
+    """
+    pulled = []
+    try:
+        bom = _client.get_bom(part_number)
+    except Exception as e:
+        FreeCAD.Console.PrintWarning(f"Could not fetch BOM for {part_number}: {e}\n")
+        return pulled
+
+    for entry in bom:
+        child_pn = entry.get("child_part_number")
+        if not child_pn:
+            continue
+
+        # Skip if already exists locally
+        existing = find_file_by_part_number(child_pn)
+        if existing and existing.exists():
+            FreeCAD.Console.PrintMessage(f"  {child_pn}: already exists at {existing}\n")
+            # Still recurse — this child may itself be an assembly with missing deps
+            _pull_dependencies(child_pn, progress_callback)
+            continue
+
+        # Check if this child has a file on the server
+        try:
+            latest = _client.latest_file_revision(child_pn)
+        except Exception:
+            latest = None
+
+        if not latest or not latest.get("file_key"):
+            FreeCAD.Console.PrintMessage(f"  {child_pn}: no file on server, skipping\n")
+            continue
+
+        # Determine destination path
+        child_desc = entry.get("child_description", "")
+        dest_path = get_cad_file_path(child_pn, child_desc)
+        dest_path.parent.mkdir(parents=True, exist_ok=True)
+
+        rev_num = latest["revision_number"]
+        FreeCAD.Console.PrintMessage(f"  Pulling {child_pn} rev {rev_num}...\n")
+
+        try:
+            ok = _client._download_file(
+                child_pn, rev_num, str(dest_path), progress_callback=progress_callback
+            )
+            if ok:
+                pulled.append((child_pn, dest_path))
+        except Exception as e:
+            FreeCAD.Console.PrintWarning(f"  Failed to pull {child_pn}: {e}\n")
+
+        # Recurse into child (it may be a sub-assembly)
+        _pull_dependencies(child_pn, progress_callback)
+
+    return pulled
+
+
 class Silo_Pull:
     """Download from MinIO / sync from database."""
 
@@ -1092,6 +1157,17 @@ class Silo_Pull:
 
         FreeCAD.Console.PrintMessage(f"Pulled revision {rev_num} of {part_number}\n")
 
+        # Pull assembly dependencies before opening so links resolve
+        if item.get("item_type") == "assembly":
+            progress.setLabelText(f"Pulling dependencies for {part_number}...")
+            progress.setValue(0)
+            progress.show()
+            dep_pulled = _pull_dependencies(part_number, progress_callback=on_progress)
+            progress.setValue(100)
+            progress.close()
+            if dep_pulled:
+                FreeCAD.Console.PrintMessage(f"Pulled {len(dep_pulled)} dependency file(s)\n")
+
         # Close existing document if open, then reopen
         if doc and doc.FileName == str(dest_path):
             FreeCAD.closeDocument(doc.Name)