init: 商品图合规检测工具（豆包初筛 + DeepSeek 复检级联）

- src 标准布局：config/providers/pipeline/report + CLI/Tk GUI 双入口
- 级联省钱：豆包全量初筛，仅无违规/违规不明图进 DeepSeek 复检（含两票复核）
- 输出：时间戳目录 + 分类文件夹图片归档 + Excel 报表
- 30 个单元测试（tests/，测试图片不入库）

tests/test_config.py

@@ -0,0 +1,70 @@
+# -*- coding: utf-8 -*-
+"""config 模块测试：模板生成、缺项检测、读写回环、提示词路径。"""
+from violation_detector.config import (
+    AppConfig, ensure_config, load_config, missing_fields, save_config,
+)
+
+
+def test_ensure_config_creates_template(tmp_path):
+    ini = tmp_path / "config.ini"
+    path = ensure_config(str(ini))
+    assert path == ini
+    text = ini.read_text(encoding="utf-8")
+    assert "[ark]" in text and "[deepseek]" in text
+
+
+def test_ensure_config_keeps_existing(tmp_path):
+    ini = tmp_path / "config.ini"
+    ini.write_text("[ark]\napi_key = abc\n", encoding="utf-8")
+    ensure_config(str(ini))
+    assert "api_key = abc" in ini.read_text(encoding="utf-8")
+
+
+def test_missing_fields_all_empty():
+    # deepseek_model 有默认值；只有用户在 ini 里清空才视为缺失
+    missing = missing_fields(AppConfig(deepseek_model=""))
+    assert len(missing) == 4
+    assert any("豆包 API Key" in m for m in missing)
+    assert any("DeepSeek API Key" in m for m in missing)
+
+
+def test_missing_fields_default_model_ok():
+    # 默认仅缺：豆包 Key、豆包接入点、DeepSeek Key（DeepSeek 模型有默认值）
+    missing = missing_fields(AppConfig())
+    assert len(missing) == 3
+    assert not any("DeepSeek 模型" in m for m in missing)
+
+
+def test_missing_fields_none_when_filled():
+    cfg = AppConfig(ark_api_key="k1", ark_model="ep-1",
+                    deepseek_api_key="sk-1", deepseek_model="m1")
+    assert missing_fields(cfg) == []
+
+
+def test_save_and_load_roundtrip(tmp_path):
+    ini = tmp_path / "config.ini"
+    cfg = AppConfig(ark_api_key="ark-key", ark_model="ep-xyz",
+                    deepseek_api_key="sk-key", deepseek_model="ds-model",
+                    ark_workers=8, max_tokens=4000, prompt_file="my.txt")
+    save_config(cfg, str(ini))
+    loaded = load_config(str(ini))
+    assert loaded.ark_api_key == "ark-key"
+    assert loaded.ark_model == "ep-xyz"
+    assert loaded.deepseek_api_key == "sk-key"
+    assert loaded.deepseek_model == "ds-model"
+    assert loaded.ark_workers == 8
+    assert loaded.max_tokens == 4000
+    assert loaded.prompt_file == "my.txt"
+    assert loaded.recheck_categories == ["无违规", "违规不明", "检测异常"]
+
+
+def test_prompt_path_defaults_to_builtin():
+    cfg = AppConfig()
+    assert cfg.prompt_path.name == "prompts.txt"
+
+
+def test_prompt_path_custom(tmp_path):
+    p = tmp_path / "p.txt"
+    p.write_text("x", encoding="utf-8")
+    cfg = AppConfig(prompt_file=str(p))
+    assert cfg.prompt_path == p