test: add unit tests for eye protection, restore tip and view state

[pengfeixx]

Add new test suites for EyeProtectionManager/EyeProtectionAction and RestoreTipWidget; extend Database, DocSheet, sidebar and browser tests to cover tab group persistence, view state restore and theme lambdas.

新增护眼管理、恢复提示控件测试套件；补充数据库标签组持久化、
文档状态恢复、目录展开及主题切换 lambda 等测试用例。

Log: 补充单元测试用例
Influence: 仅新增/修改测试代码，不影响功能逻辑，提升测试覆盖率。

Summary by Sourcery

Increase unit-test coverage for eye protection, restore-tip behavior, persisted tab groups, and document view-state restoration.

Enhancements:

• Expand unit-test coverage for database tab-group persistence and orphan-state cleanup.
• Cover document view-state saving and restoration, active-file selection, pending tabs, sidebar expansion and sizing, scrolling, and restore-tip interactions.
• Add dedicated tests for eye-protection management/actions, restore-tip widgets, and related UI event handling.
• Exercise browser image processing, document identifiers, catalog restoration, theme changes, and other UI lambdas and edge cases.

Tests:

• Add unit-test suites for EyeProtectionManager/EyeProtectionAction and RestoreTipWidget, while extending coverage across database, document, browser, sidebar, and UI-frame components.

[sourcery-ai]

Reviewer's Guide

Adds test-only coverage for eye protection, restore-tip interactions, tab-group persistence, document/view-state restoration, sidebar expansion, theme/night-mode callbacks, and related UI branches; also fixes a renderer test fixture so its callback path is actually exercised.

File-Level Changes

Change	Details	Files
Added focused unit coverage for eye-protection management/actions and restore-tip widget behavior.	Verified color validity, mode changes, duplicate-mode early return, and action callbacks. Exercised restore-tip visibility, painting, resizing, font updates, and jump/close signals.	tests/eyeprotection/ut_eyeprotection.cpp tests/widgets/ut_restoretipwidget.cpp tests/widgets/ut_roundcolorwidget.cpp
Expanded persistence and document/view-state tests across database, document sheets, tabs, and central UI.	Covered tab-group creation, replacement, reading, clearing, and orphan-state cleanup. Exercised view-state save/restore, scroll position, sidebar width, splitter handling, active-file selection, and restore-tip signal paths. Added file-identifier and pending/initial active-file cases.	tests/app/ut_database.cpp tests/document/ut_djvumodel.cpp tests/document/ut_pdfmodel.cpp tests/uiframe/ut_central.cpp tests/uiframe/ut_centraldocpage.cpp tests/uiframe/ut_docsheet.cpp tests/uiframe/ut_doctabbar.cpp tests/ut_mainwindow.cpp
Added sidebar and browser coverage for state restoration and UI/theme-related callbacks.	Tested catalog expanded-section capture/restoration and empty-input paths. Triggered theme-change and eye-protection lambdas, plus browser night-mode and scroll restoration branches.	tests/sidebar/ut_catalogtreeview.cpp tests/sidebar/ut_catalogwidget.cpp tests/sidebar/ut_sheetsidebar.cpp tests/sidebar/ut_sidebarimagelistview.cpp tests/browser/ut_browserpage.cpp tests/browser/ut_sheetbrowser.cpp
Corrected the page-render thread test setup to exercise the live-renderer callback path.	Constructed and supplied a SheetRenderer so the document-open task reaches handleOpened.	tests/browser/ut_pagerenderthread.cpp

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: lzwind, pengfeixx

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