feat(web): 项目级配置 + 会话命名/历史 + 设计文档纳入影响调查

- 会话支持 name/project 字段，上传要件定义后自动命名；前端侧边栏会话历史 + localStorage 恢复，顶部只显示会话名
- 新增 ProjectsStore（SQLite）与 /api/projects CRUD；绑定项目后 _rebuild_source 合并模板/规则/代码库/设计文档，上传区仅要件定义
- StructuredSource.design_docs 与 ImpactReport.design_references；影响调查新增既有设计文档确定性交叉引用（无 LLM）
- 同步更新 docs/design.md §12.7、README、_AI_USAGE_LOG.md；全量测试 558 通过，覆盖率 99.10%

tests/test_server_store.py

@@ -1,12 +1,15 @@
 """S2：SQLite 会话存储测试（server/store.py）。
 
-覆盖：创建会话 / 列表 / 状态更新 / 文件登记 / 结果路径 / 持久化重建。
+覆盖：创建会话 / 列表 / 状态更新 / 文件登记 / 结果路径 / 持久化重建 / 会话命名与项目绑定 / 项目配置存储。
 """
 from __future__ import annotations
 
 import pytest
+from pathlib import Path
 
-from genesis.server.store import SessionStore, SessionRecord, SessionNotFoundError
+from genesis.server.store import (
+    SessionStore, SessionRecord, SessionNotFoundError, ProjectsStore, ProjectConfigError,
+)
 
 
 @pytest.fixture
@@ -79,3 +82,134 @@ def test_store_reload_persists(tmp_path):
     got = store2.get_session(s.session_id)
     assert got.status == "done"
     assert got.result_path == "x.docx"
+
+
+# ---------- 会话命名与项目绑定 ----------
+
+def test_session_record_name_and_project_defaults():
+    rec = SessionRecord(session_id="s1", user_id="u1")
+    assert rec.name == "新会话"
+    assert rec.project == ""
+    assert rec.to_dict["name"] == "新会话"
+    assert rec.to_dict["project"] == ""
+
+
+def test_create_session_with_name_and_project(store):
+    s = store.create_session("u1", name="我的会话", project="projA")
+    got = store.get_session(s.session_id)
+    assert got.name == "我的会话"
+    assert got.project == "projA"
+
+
+def test_session_persists_name_project(tmp_path):
+    db = str(tmp_path / "s.db")
+    s = SessionStore(db_path=db).create_session("u1", name="名字", project="p")
+    reopened = SessionStore(db_path=db).get_session(s.session_id)
+    assert reopened.name == "名字"
+    assert reopened.project == "p"
+
+
+# ---------- 项目配置存储（ProjectsStore） ----------
+
+@pytest.fixture
+def projects_store(tmp_path):
+    return ProjectsStore(db_path=str(tmp_path / "projects.db"))
+
+
+def _make_docx(path: Path) -> str:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_bytes(b"PK\x03\x04")  # 最小占位，仅用于存在性/后缀校验
+    return str(path)
+
+
+def test_projects_upsert_and_get(projects_store, tmp_path):
+    tpl = _make_docx(tmp_path / "t.docx")
+    wi = _make_docx(tmp_path / "wi.docx")
+    rules_dir = tmp_path / "rules"
+    rules_dir.mkdir()
+    _make_docx(rules_dir / "r1.docx")
+    cfg = projects_store.upsert(
+        name="stock", display_name="股票系统", template=tpl, write_instruction=wi,
+        rules=[str(rules_dir)], existing_system_code_dir="", design_docs_dir="",
+    )
+    assert cfg.name == "stock"
+    got = projects_store.get("stock")
+    assert got is not None
+    assert got.display_name == "股票系统"
+    assert got.template == tpl
+    assert got.rules == [str(rules_dir / "r1.docx")]
+
+
+def test_projects_list_and_delete(projects_store, tmp_path):
+    _make_docx(tmp_path / "t.docx")
+    projects_store.upsert(name="p1", display_name="P1", template=str(tmp_path / "t.docx"),
+                          write_instruction="", rules=[], existing_system_code_dir="", design_docs_dir="")
+    assert any(p.name == "p1" for p in projects_store.list())
+    assert projects_store.delete("p1") is True
+    assert projects_store.get("p1") is None
+
+
+def test_projects_upsert_enumerates_design_docs_dir(projects_store, tmp_path):
+    _make_docx(tmp_path / "t.docx")
+    dd = tmp_path / "design"
+    dd.mkdir()
+    _make_docx(dd / "d1.docx")
+    _make_docx(dd / "d2.docx")
+    cfg = projects_store.upsert(name="p", display_name="P", template=str(tmp_path / "t.docx"),
+                                write_instruction="", rules=[], existing_system_code_dir="",
+                                design_docs_dir=str(dd))
+    assert set(cfg.rules) == set()  # 仅 design_docs_dir，rules 为空
+    assert len(cfg.rules) == 0
+
+
+def test_projects_upsert_rejects_missing_template(projects_store, tmp_path):
+    with pytest.raises(ProjectConfigError):
+        projects_store.upsert(name="p", display_name="P", template=str(tmp_path / "nope.docx"),
+                              write_instruction="", rules=[], existing_system_code_dir="", design_docs_dir="")
+
+
+def test_projects_upsert_rejects_non_docx(projects_store, tmp_path):
+    bad = tmp_path / "x.txt"
+    bad.write_text("x")
+    with pytest.raises(ProjectConfigError):
+        projects_store.upsert(name="p", display_name="P", template=str(bad),
+                              write_instruction="", rules=[], existing_system_code_dir="", design_docs_dir="")
+
+
+def test_projects_upsert_rejects_missing_code_dir(projects_store, tmp_path):
+    _make_docx(tmp_path / "t.docx")
+    with pytest.raises(ProjectConfigError):
+        projects_store.upsert(name="p", display_name="P", template=str(tmp_path / "t.docx"),
+                              write_instruction="", rules=[], existing_system_code_dir=str(tmp_path / "missing"),
+                              design_docs_dir="")
+
+
+def test_projects_reupsert_updates(projects_store, tmp_path):
+    _make_docx(tmp_path / "t.docx")
+    projects_store.upsert(name="p", display_name="P", template=str(tmp_path / "t.docx"),
+                          write_instruction="", rules=[], existing_system_code_dir="", design_docs_dir="")
+    projects_store.upsert(name="p", display_name="P2", template=str(tmp_path / "t.docx"),
+                          write_instruction="", rules=[], existing_system_code_dir="", design_docs_dir="")
+    assert projects_store.get("p").display_name == "P2"
+
+
+def test_projects_code_dir_must_be_directory(projects_store, tmp_path):
+    _make_docx(tmp_path / "t.docx")
+    (tmp_path / "afile.txt").write_text("x")
+    with pytest.raises(ProjectConfigError):
+        projects_store.upsert(name="p", display_name="P", template=str(tmp_path / "t.docx"),
+                              write_instruction="", rules=[], existing_system_code_dir=str(tmp_path / "afile.txt"),
+                              design_docs_dir="")
+
+
+def test_projects_empty_template_skips_validation(projects_store, tmp_path):
+    # 模板留空：不应触发文件校验（line 271/273 分支）
+    cfg = projects_store.upsert(name="p", display_name="P", template="",
+                                write_instruction="", rules=[], existing_system_code_dir="", design_docs_dir="")
+    assert cfg.template == ""
+
+
+def test_projects_upsert_empty_name_rejected(projects_store, tmp_path):
+    with pytest.raises(ProjectConfigError):
+        projects_store.upsert(name="", display_name="P", template="", write_instruction="",
+                              rules=[], existing_system_code_dir="", design_docs_dir="")