test: 覆盖率提升至 100%（fail_under 90→99，13 个防御/边界用例）

tests/test_excel_parser.py

@@ -4,6 +4,43 @@ from genesis.parsers.excel_parser import ExcelParseResult, ExcelParser
 from tests.excel_helpers import new_workbook, save_workbook
 
 
+def test_parse_skips_empty_sheet(tmp_path):
+    # 空 sheet → skipped 不进入（L skips 分支）
+    wb = new_workbook({"空白": [[]]})
+    path = save_workbook(tmp_path, wb)
+    result = ExcelParser().parse(path)
+    assert "空白" in result.skipped
+    assert result.tables == []
+
+
+def test_parse_mixed_formatting_outside_table_segment(tmp_path):
+    # 碎片段（free_text 段）存在取消线格式 → seg_fmt_map 构建时该行不在表格段 [s,e] 内，被跳过（66-65 分支）
+    from copy import copy
+    from openpyxl import Workbook
+    wb = Workbook()
+    ws = wb.active
+    ws.title = "混合"
+    data = [
+        ["機能ID", "機能名"], ["F101", "社員登録"],
+        [],
+        ["・改述ポイント"],
+    ]
+    for r, row in enumerate(data, start=1):
+        for c, v in enumerate(row, start=1):
+            if v:
+                ws.cell(row=r, column=c, value=v)
+    font = copy(ws.cell(row=4, column=1).font)  # 碎片段行（物理行 4）
+    font.strike = True
+    ws.cell(row=4, column=1).font = font
+    path = save_workbook(tmp_path, wb)
+    result = ExcelParser().parse(path)
+    ms = result.mixed[0]
+    tbl = [p.table for p in ms.paragraphs if p.kind == "table"][0]
+    # 表格段数据行不应带上碎片段的取消线格式
+    assert tbl.rows[0]["機能ID"].formatting is None
+    assert len(tbl.rows) == 1
+
+
 def test_parse_table_sheets(tmp_path):
     wb = new_workbook({
         "機能一覧": [["機能ID", "機能名"], ["A001", "社員登録"]],