WM-241: remove activate_session/deactivate_session requests

[deepin-wm]

Related to WM-241

Drop the activate_session / deactivate_session requests from
xml/treeland-ddm-v1.xml. VT switching is now handled natively by
wlroots/libseat (dde-seatd), ddm never sends these requests, and the
treeland handlers that implemented them have been removed in the
companion treeland PR, so these dead protocol requests are no longer
needed.

This is a private treeland<->ddm protocol; removing unused requests is
safe. No version bump is required — removing requests does not break
clients (and no client sends them). ddm does not reference these
requests and builds against either the old or new protocol.

Summary by Sourcery

Remove unused treeland-ddm protocol requests related to session activation and deactivation, relying on native VT switching instead.

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Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR updates the private treeland<->ddm protocol definition by removing two now-unused session control requests from the XML protocol file, relying instead on native VT handling in wlroots/libseat.

Sequence diagram for removed treeland_ddm session control requests

sequenceDiagram
    participant ddm
    participant treeland

    ddm->>treeland: activate_session
    ddm->>treeland: deactivate_session

Loading

File-Level Changes

Change	Details	Files
Remove obsolete session activation/deactivation requests from the treeland-ddm protocol XML.	Delete the activate_session request definition and its description block from the protocol XML. Delete the deactivate_session request definition and its description block from the protocol XML, leaving surrounding requests (e.g., enable_render) unchanged.	xml/treeland-ddm-v1.xml

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: deepin-wm

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Details

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• debian/deepin/OWNERS

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[deepin-ci-robot]

deepin pr auto review

★ 总体评分：95分

■ 【总体评价】

代码通过移除Wayland协议中的冗余接口实现了接口清理与废弃操作
逻辑正确且符合XML规范，因无安全漏洞且提升代码整洁度给予95分

■ 【详细分析】

• 1.语法逻辑完全正确✓

在文件 xml/treeland-ddm-v1.xml 中，移除了 activate_session 和 deactivate_session 两个 request 节点，XML 标签闭合正确，未破坏文档结构。
潜在问题：无
建议：无需修改

• 2.代码质量良好✓

移除不再使用的接口定义，有助于减少协议的复杂度和维护成本，保持协议文件的精简。
潜在问题：无
建议：建议同步检查 C++ 后端实现代码中对应的 TreelandDdm::activate_session() 和 TreelandDdm::deactivate_session() 方法是否已一并删除，避免残留死代码。

• 3.代码性能无性能问题✓

协议文件的精简不会对运行时性能产生负面影响，反而可能略微减少协议解析时的开销。
潜在问题：无
建议：无需修改

• 4.代码安全存在0个安全漏洞✓

漏洞对比统计：新增漏洞 0 个，减少漏洞 0 个，持平 0 个
本次变更仅涉及删除冗余的 Wayland 协议接口定义，未引入任何外部输入处理或危险操作，无安全风险。

• 建议：无需安全修复

■ 【改进建议代码示例】

diff --git a/xml/treeland-ddm-v1.xml b/xml/treeland-ddm-v1.xml
index 6fd1154..1a3fd60 100644
--- a/xml/treeland-ddm-v1.xml
+++ b/xml/treeland-ddm-v1.xml
@@ -22,18 +22,6 @@
             </description>
             <arg name="username" type="string"/>
         </request>
-        <request name="activate_session">
-            <description summary="activate wayland session">
-                Activate treeland session. This will makes treeland try to take
-                control of screen.
-            </description>
-        </request>
-        <request name="deactivate_session">
-            <description summary="deactivate wayland session">
-                Deactivate treeland session. This will release control of the
-                screen, but not to close the current seats.
-            </description>
-        </request>
         <request name="enable_render">
             <description summary="start treeland rendering">
                 Enable treeland rendering. This is primarily called after