fix: handle missing template files gracefully at startup

backend/app/services/template_service.py

@@ -41,10 +41,16 @@ def _load_phase13_template_asset(
     template_category: str,
     industry_category: str,
     description: str,
-) -> dict[str, Any]:
+) -> dict[str, Any] | None:
     asset_dir = TEMPLATE_LIBRARY_ROOT / folder_name
-    markdown = (asset_dir / f"{template_code}.md").read_text(encoding="utf-8-sig")
-    variables_data = json.loads((asset_dir / f"{template_code}-variables.json").read_text(encoding="utf-8-sig"))
+    md_file = asset_dir / f"{template_code}.md"
+    if not md_file.is_file():
+        return None
+    json_file = asset_dir / f"{template_code}-variables.json"
+    if not json_file.is_file():
+        return None
+    markdown = md_file.read_text(encoding="utf-8-sig")
+    variables_data = json.loads(json_file.read_text(encoding="utf-8-sig"))
     required_variables = variables_data.get("required_variables", [])
     optional_variables = variables_data.get("optional_variables", [])
     variables = [
@@ -688,6 +694,9 @@ DEFAULT_TEMPLATES: list[dict[str, Any]] = [
     ),
 ]
 
+# Filter out templates whose source files are missing (e.g. in Docker builds without project-docs)
+DEFAULT_TEMPLATES: list[dict[str, Any]] = [t for t in DEFAULT_TEMPLATES if t is not None]
+
 
 class TemplateService:
     def __init__(self, db: Session):