refactor: prepare for combined model for taskmanager

[BLumia]

为后续多任务区域切换到新的合并模型做出准备。
目前的表现行为仍然和之前一致，无行为变化(taskmanager实际使用的仍然是原模型)。

Summary by Sourcery

Refactor TaskManager to build a new combined data-model pipeline through proxy models and an abstract interface, enabling future multi-task area support without altering current behavior.

Enhancements:

• Introduce AbstractTaskManagerInterface and BoolFilterModel to standardize task activation and filtering operations.
• Add DockCombineModel, DockGlobalElementModel, DockItemModel, and DockGroupModel to merge, group, and present application and dock elements.
• Extend TaskManager to use the new models, route QML invocations through the abstract interface, and expose an updated roles enum.
• Update TaskManagerSettings to load and persist a new ‘dockedElements’ configuration for global dock entries.

Build:

• Add new model headers and source files to the taskmanager CMakeLists.txt for the combined-model refactor.

[sourcery-ai]

Reviewer's Guide

Refactor introduces a unified proxy‐model pipeline and an abstract interface to prepare for a combined model in TaskManager, without altering existing behavior.

File-Level Changes

Change	Details	Files
Introduce AbstractTaskManagerInterface for unified request forwarding	Add abstracttaskmanagerinterface.h with request* pure virtuals Add callInterfaceMethod templates to map proxy calls to source models Update TaskManager and proxy models to implement and use the interface	panels/dock/taskmanager/abstracttaskmanagerinterface.h panels/dock/taskmanager/taskmanager.h panels/dock/taskmanager/taskmanager.cpp panels/dock/taskmanager/dockcombinemodel.cpp panels/dock/taskmanager/dockitemmodel.cpp panels/dock/taskmanager/dockgroupmodel.cpp
Reconstruct TaskManager to build model pipeline and expose interface	Define Roles enum and change dataModel property to QAbstractItemModel* Create BoolFilterModel and use it to filter out skipped windows Chain DockCombineModel, DockGlobalElementModel, DockItemModel Implement Q_INVOKABLE request* methods forwarding to itemModel	panels/dock/taskmanager/taskmanager.h panels/dock/taskmanager/taskmanager.cpp
Add new proxy models to support combined and grouped views	DockCombineModel merges major/minor models and remaps roles DockGlobalElementModel aggregates active and docked elements DockItemModel toggles between split and grouped source models DockGroupModel groups multiple windows under one entry	panels/dock/taskmanager/dockcombinemodel.h panels/dock/taskmanager/dockcombinemodel.cpp panels/dock/taskmanager/dockglobalelementmodel.h panels/dock/taskmanager/dockglobalelementmodel.cpp panels/dock/taskmanager/dockitemmodel.h panels/dock/taskmanager/dockitemmodel.cpp panels/dock/taskmanager/dockgroupmodel.h panels/dock/taskmanager/dockgroupmodel.cpp
Extend TaskManagerSettings to persist and signal dockedElements	Add TASKMANAGER_DOCKEDELEMENTS_KEY constant Introduce m_dockedElements property with getter and signal Load and emit dockedElementsChanged in constructor and on config changes	panels/dock/taskmanager/taskmanagersettings.h panels/dock/taskmanager/taskmanagersettings.cpp
Add new constants for actions, settings keys, and model roles	Define DOCK_ACTION_* strings and TASKMANAGER_DOCKEDELEMENTS_KEY Add MODEL_* role name constants and DEFAULT_APP_ICONNAME	panels/dock/taskmanager/globals.h
Update build configuration to include new model sources	Add dockcombinemodel, dockglobalelementmodel, dockitemmodel, dockgroupmodel files to CMakeLists	panels/dock/taskmanager/CMakeLists.txt

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[sourcery-ai]

Hey @BLumia - I've reviewed your changes - here's some feedback:

• The stubbed-out AbstractTaskManagerInterface methods in DockGlobalElementModel (e.g. requestOpenUrls, requestUpdateWindowGeometry, requestWindowsView) are currently no-ops—either implement them or remove them to avoid silent failures.
• Avoid using synchronous QProcess::waitForFinished in DockGlobalElementModel::requestNewInstance since it blocks the UI thread; consider launching the process asynchronously or using a job API instead.
• In BoolFilterModel::filterAcceptsRow, the check if (sourceRow > sourceModel()->rowCount()) should use >= to correctly guard against out-of-range row indices.

Here's what I looked at during the review

• 🟡 General issues: 2 issues found
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: 18202781743, BLumia

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• debian/deepin/OWNERS

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