Initial project baseline

backend/README_zh.md

@@ -0,0 +1,21 @@
+# EfficientWordCloud 后端说明
+
+后端文档已统一迁移到项目根目录的 `docs/`。
+
+请从这里开始：
+
+- [../docs/README.md](../docs/README.md)
+- [../docs/PROJECT_STANDARD.md](../docs/PROJECT_STANDARD.md)
+- [../docs/ALGORITHM.md](../docs/ALGORITHM.md)
+- [../docs/CONFIG.md](../docs/CONFIG.md)
+- [../docs/API.md](../docs/API.md)
+
+源码事实来源：
+
+- `backend/core/config.py`
+- `backend/core/pipeline.py`
+- `backend/core/layout.py`
+- `backend/core/weights.py`
+- `backend/service/app.py`
+- `backend/service/schemas.py`
+- `backend/EfficientWordCloud/efficient_wordcloud/src/ewc_core.cpp`