chore: extend .gitignore + add missing integration test

- .gitignore: add .DS_Store, *.log, *.bak, sailo-claude-backup/, .aw/, *.db,
  pytest_cache, test artifacts
- tests/test_md2doc_integration.py: missed in Task 8 commit

.gitignore

@@ -1,3 +1,30 @@
-.venv/
+# Python
 __pycache__/
 *.pyc
+*.pyo
+.pytest_cache/
+*.egg-info/
+.venv/
+venv/
+
+# macOS
+.DS_Store
+
+# Logs
+*.log
+firebase-debug.log
+
+# Backups
+*.bak
+sailo-claude-backup/
+
+# AW local state (PostgreSQL is source of truth)
+.aw/
+
+# Local databases
+vectors.db
+*.db
+
+# Generated test artifacts
+tests/_tmp_*.docx
+tests/_tmp_*.pdf

tests/test_md2doc_integration.py

@@ -0,0 +1,60 @@
+"""Integration test — full md → docx conversion on pluxee-todo.md fixture."""
+import subprocess
+import sys
+import zipfile
+import xml.etree.ElementTree as ET
+from pathlib import Path
+
+REPO = Path(__file__).parent.parent
+FIXTURE = REPO / "pluxee-todo.md"
+W_NS = "http://schemas.openxmlformats.org/wordprocessingml/2006/main"
+
+
+def test_convert_pluxee_todo_creates_valid_docx(tmp_path):
+    out = tmp_path / "pluxee.docx"
+    r = subprocess.run(
+        [sys.executable, "md2doc.py", str(FIXTURE), "-o", str(out)],
+        cwd=REPO, capture_output=True, text=True
+    )
+    assert r.returncode == 0, f"Conversion failed: {r.stderr}"
+    assert out.exists()
+    assert out.stat().st_size > 0
+
+
+def test_converted_docx_has_headings_and_paragraphs(tmp_path):
+    out = tmp_path / "pluxee.docx"
+    subprocess.run(
+        [sys.executable, "md2doc.py", str(FIXTURE), "-o", str(out), "-q"],
+        cwd=REPO, capture_output=True, text=True
+    )
+    with zipfile.ZipFile(out) as z:
+        root = ET.fromstring(z.read("word/document.xml"))
+    headings = list(root.iter(f"{{{W_NS}}}pStyle"))
+    heading_vals = [h.get(f"{{{W_NS}}}val") for h in headings]
+    assert any(v and v.startswith("Heading") for v in heading_vals), \
+        f"expected at least one Heading style, got {heading_vals}"
+
+
+def test_image_in_markdown_warns_to_stderr(tmp_path):
+    md_with_image = tmp_path / "img.md"
+    md_with_image.write_text("# Test\n\n![alt text](https://example.com/x.png)\n")
+    out = tmp_path / "img.docx"
+    r = subprocess.run(
+        [sys.executable, "md2doc.py", str(md_with_image), "-o", str(out)],
+        cwd=REPO, capture_output=True, text=True
+    )
+    assert r.returncode == 0  # warning, not error
+    assert "image" in r.stderr.lower() or "skip" in r.stderr.lower()
+
+
+def test_directory_mode_converts_all_md(tmp_path):
+    (tmp_path / "a.md").write_text("# A\n")
+    (tmp_path / "b.md").write_text("# B\n")
+    out_dir = tmp_path / "out"
+    r = subprocess.run(
+        [sys.executable, "md2doc.py", str(tmp_path), "-o", str(out_dir)],
+        cwd=REPO, capture_output=True, text=True
+    )
+    assert r.returncode == 0
+    assert (out_dir / "a.docx").exists()
+    assert (out_dir / "b.docx").exists()