feat: drop alpha from accent color in appearance protocols

[wineee]

1. Remove the a argument from set_accent_color in treeland-appearance-manager-unstable-v1.xml
2. Remove the a argument from accent_color event in treeland-appearance-unstable-v1.xml
3. Add 0.7.0 breaking-change entries to dde/ and public/ READMEs
4. Bump project version to 0.7.0 in CMakeLists.txt

Log: Accent color is now opaque RGB (r, g, b) on the wire; the alpha channel is no longer carried by either the privileged set request or the read-only observer event.

Influence:

1. Bind treeland_appearance_manager_v1 and call set_accent_color with three uint args (r, g, b); verify the compositor applies the color and no longer reads a trailing alpha value
2. Bind treeland_appearance_v1 and confirm the accent_color event delivers exactly three uint args (r, g, b) on initial bind and on subsequent changes
3. Verify clients sending the old four-arg (r, g, b, a) signature are rejected or handled per compositor policy after the wire change

feat: 活动色协议去掉 alpha 分量

1. 移除 treeland-appearance-manager-unstable-v1.xml 中 set_accent_color 的 a 参数
2. 移除 treeland-appearance-unstable-v1.xml 中 accent_color 事件的 a 参数
3. 在 dde/ 与 public/ 的 README 中补充 0.7.0 破坏性变更条目
4. CMakeLists.txt 项目版本号升至 0.7.0

Log: 活动色现上线缆为不透明 RGB（r, g, b）；特权设置请求与只读观察事件均不再携带 alpha 通道。

Influence:

1. 绑定 treeland_appearance_manager_v1 并以三个 uint 参数（r, g, b）调用 set_accent_color，验证合成器应用该颜色且不再读取末尾 alpha 值
2. 绑定 treeland_appearance_v1，确认 accent_color 事件在初始绑定及后续变化时均只发送三个 uint 参数（r, g, b）
3. 验证发送旧四参数（r, g, b, a）签名的客户端在线缆变更后被拒绝或按合成器策略处理

Summary by Sourcery

Adopt opaque RGB accent colors across the appearance protocols and release the breaking wire-format change as version 0.7.0.

Enhancements:

• Make accent colors opaque RGB values by removing the alpha component from the appearance manager request and appearance observer event.

Build:

• Bump the project version to 0.7.0.

Documentation:

• Document the 0.7.0 breaking changes for the updated accent color protocols in English and Chinese README files.

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: wineee

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Details

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• debian/deepin/OWNERS

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[sourcery-ai]

Reviewer's Guide

This PR introduces the 0.7.0 breaking wire-format change that removes alpha from both accent-color setting and notification, so clients now send and receive only opaque r, g, b uint values; corresponding English and Chinese migration notes are added.

Sequence diagram for opaque accent color protocol

sequenceDiagram
    participant Client
    participant Compositor
    participant Observer

    Client->>Compositor: set_accent_color(r, g, b)
    Compositor-->>Observer: accent_color(r, g, b)
    Note over Client,Observer: Alpha is not carried on the wire

Loading

File-Level Changes

Change	Details	Files
Remove alpha from the appearance protocol wire format, making accent colors opaque RGB triples.	Remove the alpha argument from the privileged accent-color setter. Remove the alpha argument from the read-only accent-color notification. Update protocol documentation with consumer migration guidance for the breaking change.	dde/treeland-appearance-manager-unstable-v1.xml public/treeland-appearance-unstable-v1.xml dde/README.md dde/README.zh_CN.md public/README.md public/README.zh_CN.md
Publish the protocol change as release 0.7.0.	Bump the CMake project version from 0.6.0 to 0.7.0.	CMakeLists.txt

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