Prepare Agent Pet Companion 0.5.2 (#57)

## Development claim / 开发声明

- Domain: `release-control-plane`
- Claim: `control-plane`
- Base commit: `e032ec1ca86ff84d9696aee23c677b526854bf50`
- Release preparation: `yes`
- Focused validation:
  - `python3 script/tests/test_validation_tooling.py`
  - `./script/validate_build_scripts_safety.sh --static-only`

<!-- apc-engineering-coordination-v1
{"claim_overlap_rejections":2,"merge_tree_conflicts":0,"schema_version":"apc.engineering-coordination.v1","task_created_at":"2026-08-24T09:10:46Z","train_conflict_resolutions":0}
-->

Co-authored-by: gd-ops <gd-ops@xmfunny.com>

CHANGELOG.md

@@ -14,6 +14,18 @@ Keep each user-visible change in its own bullet. Write the English text first, t
 
 ## [Unreleased]
 
+## [0.5.2] - 2026-08-24
+
+### Fixed / 修复
+
+<!-- apc-fragment:20260824-engineering-debt-localization -->
+- Connection check, repair, and uninstall results and the pet-position save-failure notice now resolve through the localization tables, so English-locale users see English copy instead of mixed Chinese. Chinese copy is unchanged.
+
+  连接检查、修复、卸载的结果文案与桌宠位置保存失败提示改经本地化表解析，英文界面不再混入中文文案；中文界面文案保持不变。
+<!-- apc-fragment:20260824-pr54-review-findings -->
+- Queued PetCore requests now cancel before opening socket resources, and exhausted pet-position saves surface a localized retry banner until persistence succeeds.
+
+  排队中的 PetCore 请求现在会在占用 Socket 资源前响应取消；桌宠位置保存重试耗尽后会显示本地化重试横幅，并在持久化成功后自动消失。
 ## [0.5.1] - 2026-08-19
 
 ### Changed / 变更

Cargo.lock

@@ -772,7 +772,7 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
 [[package]]
 name = "petcore"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "hex",
  "image",
@@ -792,7 +792,7 @@ dependencies = [
 
 [[package]]
 name = "petcore-cli"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "petcore",
  "petcore-types",
@@ -803,7 +803,7 @@ dependencies = [
 
 [[package]]
 name = "petcore-types"
-version = "0.5.1"
+version = "0.5.2"
 dependencies = [
  "serde",
  "serde_json",

changes/unreleased/20260824-engineering-debt-localization.json

@@ -1,7 +0,0 @@
-{
-  "schema_version": "apc.changelog-fragment.v1",
-  "kind": "Fixed",
-  "scope": "localization",
-  "summary_en": "Connection check, repair, and uninstall results and the pet-position save-failure notice now resolve through the localization tables, so English-locale users see English copy instead of mixed Chinese. Chinese copy is unchanged.",
-  "summary_zh": "连接检查、修复、卸载的结果文案与桌宠位置保存失败提示改经本地化表解析，英文界面不再混入中文文案；中文界面文案保持不变。"
-}

changes/unreleased/20260824-pr54-review-findings.json

@@ -1,7 +0,0 @@
-{
-  "schema_version": "apc.changelog-fragment.v1",
-  "kind": "Fixed",
-  "scope": "macos-runtime",
-  "summary_en": "Queued PetCore requests now cancel before opening socket resources, and exhausted pet-position saves surface a localized retry banner until persistence succeeds.",
-  "summary_zh": "排队中的 PetCore 请求现在会在占用 Socket 资源前响应取消；桌宠位置保存重试耗尽后会显示本地化重试横幅，并在持久化成功后自动消失。"
-}

crates/petcore-cli/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "petcore-cli"
-version = "0.5.1"
+version = "0.5.2"
 edition.workspace = true
 license.workspace = true
 

crates/petcore-types/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "petcore-types"
-version = "0.5.1"
+version = "0.5.2"
 edition.workspace = true
 license.workspace = true
 

crates/petcore/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "petcore"
-version = "0.5.1"
+version = "0.5.2"
 edition.workspace = true
 license.workspace = true