test: 新增 SheetRenderer/Logger 用例并扩充 DocTabBar/ThreadPool 测试 - #296

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Include file: "PDFModel.h" not found.

Include file: "DocSheet.h" not found.

Include file: "SheetRenderer.h" not found.

Include file: <QImage> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <QPixmap> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <gtest/gtest.h> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: "stub.h" not found.

Include file: "ut_common.h" not found.

Include file: "DocSheet.h" not found.