fix(output): restore configured topology after output reconnect

[zzxyb]

Persist single-output and copy-mode state in global DConfig and restore the configured output topology after the initial output scan and subsequent reconnects. Replace the transient output config state and lifecycle helpers with OutputManager so primary-output intent, surface migration, copy-output recreation, and single-output fallback all use stable output IDs.

Re-register outputs consistently in the root container and output layout before applying configuration, and update virtual-output state when copy-mode groups are restored, changed, or removed.

Log: restore display mode after output reconnect
PMS: BUG-300647
Influence: Output mode restoration after display reconnect, hotplug, and restart

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This pull-request has been approved by: zzxyb

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[Copilot]

Pull request overview

中文概述：
此 PR 旨在将输出拓扑（单屏 / 扩展 / 复制）相关状态持久化到全局 DConfig，并在初次扫描与输出重连（hotplug/reconnect）时基于稳定的 output ID 恢复配置；同时用新的 OutputManager 替代此前的临时状态与生命周期辅助类，以统一主屏意图、surface 迁移、复制输出重建与单屏回退逻辑。

English summary:
This PR persists single-output and copy-mode state into global DConfig and restores the configured output topology after the initial output scan and on output reconnects. It introduces OutputManager to replace transient output state/lifecycle helpers so primary-output intent, surface migration, copy-output recreation, and single-output fallback are driven by stable output IDs.

Changes:

• Introduce src/output/outputmanager.{h,cpp} and migrate Helper’s output lifecycle logic from OutputConfigState/OutputLifecycleManager to OutputManager.
• Rework initial scan + reconnect handling in Helper to restore extension/single/copy topology from global config and to re-register outputs consistently in root container/layout.
• Extend virtual-output manager API and adjust output enabling / viewport detach ordering.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 13 comments.

Show a summary per file

File	Description
waylib/src/server/qtquick/woutputviewport.cpp	Adjusts detach ordering to avoid synchronous layer-change callbacks re-querying an already-detached viewport.
src/seat/helper.h	Replaces old output helpers with OutputManager and adds new helper methods/state for topology restore.
src/seat/helper.cpp	Major refactor: initial scan gating, restore logic, root/layout re-registration, copy/single persistence, and surface migration updates.
src/output/outputmanager.h	Defines new OutputManager API for mode management, restore intents, and config persistence.
src/output/outputmanager.cpp	Implements ID-based persistence/restore for single-output + copy-mode, plus primary-output intent tracking.
src/output/outputlifecyclemanager.h	Removed (replaced by OutputManager).
src/output/outputlifecyclemanager.cpp	Removed (replaced by OutputManager).
src/output/outputconfigstate.h	Removed (no longer needed after moving persistence to global DConfig + OutputManager).
src/output/outputconfigstate.cpp	Removed (no longer needed after moving persistence to global DConfig + OutputManager).
src/output/output.cpp	Improves Output::enable() to reconcile cached _Enabled with wlroots enabled state and adds categorized logging.
src/modules/virtual-output/virtualoutputmanagerinterfacev1.h	Adds APIs to restore/update/remove virtual output groups and exposes VirtualOutputInterfaceV1::name().
src/modules/virtual-output/virtualoutputmanagerinterfacev1.cpp	Refactors persistent config handling and adds restore/update/remove support for virtual output groups.
src/CMakeLists.txt	Replaces removed output helper sources with new outputmanager sources.
misc/dconfig/org.deepin.dde.treeland.output.json	Removes per-output enabled key (shifts enable/disable semantics to global single-output/copy configuration).
misc/dconfig/org.deepin.dde.treeland.json	Adds global keys: singleOutputId, createCopyOutput, copyOutputName, copyOutputOutputs.