refactor: Implement tab state management with unique IDs

[Lighto-Ku]

This commit refactors the tab management system to use unique IDs instead of indices, and adds state persistence for tabs. Key changes include:

• Add unique ID management for tabs with getter/setter methods
• Refactor TabBar signals to use unique IDs and handle tab state changes
• Add TitleBarState struct to store view mode, search state and text per tab
• Implement state save/restore when switching between tabs
• Refactor WorkspaceWidget to use page-based management with unique IDs
• Update event system to handle tab creation, removal and changes with unique IDs

The changes improve tab state management by:

1. Making tab identification more robust using unique IDs
2. Preserving view mode, search state and text when switching tabs
3. Better handling of tab lifecycle events through the workspace
4. Cleaner separation of concerns between tab bar and workspace components

Log: refactor tab manage
Task: https://pms.uniontech.com/story-view-37823.html

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• TitleBarEventCaller::sendTabChanged 函数中，uniqueId 参数的类型从 int 更改为 const QString &，但未检查 tabIndex 是否有效。
• TabBar::removeTab 函数中，删除标签页的逻辑可能存在问题，特别是当当前标签页索引小于删除的标签页索引时。
• TitleBarWidget::onTabCurrentChanged 函数中，保存和恢复标题栏状态时，未处理 oldIndex 超出范围的情况。
• WorkspaceEventReceiver::handleTabCreated、handleTabRemoved 和 handleTabChanged 函数中，未对 workspace 和 tab 对象的有效性进行检查。
• WorkspacePage::setUrl 函数中，未处理 views 或 viewStackLayout 为空的情况。
• WorkspaceWidget::createNewPage 和 WorkspaceWidget::removePage 函数中，未处理 pages 或 viewStackLayout 为空的情况。
• WorkspaceWidget::setCurrentPage 函数中，未处理 pages 或 viewStackLayout 为空的情况。

是否建议立即修改:
是

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Johnson-zs, Lighto-Ku

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[Johnson-zs]

/forcemerge

[deepin-bot]

This pr force merged! (status: blocked)