fix(writer): 防静默丢章告警 + 占位符正则宽容化（大小写/全角冒号）

tests/test_phase5_writer_orchestrator.py

@@ -83,3 +83,28 @@ def test_generate_delegates_to_factory_when_engine_none(monkeypatch, tmp_path):
     assert len(contents) == 1
     loaded = Document(str(out))
     assert "自动生成的内容" in "\n".join(p.text for p in loaded.paragraphs)
+
+
+def test_generate_warns_on_unanchored_heading(tmp_path, caplog):
+    # 防静默丢章：无 {{section:id}} 锚点的章 → 打 WARNING 并列出章名
+    tpl = tmp_path / "tpl.docx"
+    out = tmp_path / "out.docx"
+    doc = Document()
+    doc.add_paragraph("附録", style="Heading 1")
+    doc.save(str(tpl))
+    parsed = ParsedTemplate(
+        file_name=str(tpl),
+        sections=[ChapterMarker(type="heading", name="附録", level=1)],
+        placeholders={},
+        styles={"defined": ["Heading 1"], "used": ["Heading 1"]},
+    )
+    orch = WriteOrchestrator()
+    with caplog.at_level("WARNING", logger="genesis.writer.orchestrator"):
+        orch.generate(
+            SimpleNamespace(template=parsed),
+            str(out),
+            samples_dir="nonexistent_dir_xyz",
+            engine=FakeEngine(),
+            template_path=str(tpl),
+        )
+    assert any("附録" in r.message for r in caplog.records)