release: bump version to 0.25.1

docs/CHANGELOG.md

@@ -7,6 +7,23 @@ This project follows the repository versioning rule:
 - `feature` -> `+0.1.0`
 - `bugfix` -> `+0.0.1`
 
+## 0.25.1
+
+Released: 2026-04-10
+
+### Highlights
+
+- Cleaned up the first persistent Playground rollout, fixed sidebar submenu persistence to match the intended operator behavior, and added reusable code-hygiene rules to prevent this class of drift from accumulating again.
+
+### Improved
+
+- Improved [backend/app/services/playground_chat_service.py](/home/ray/dev/linkong/planet/backend/app/services/playground_chat_service.py) and [frontend/src/pages/Playground/Playground.tsx](/home/ray/dev/linkong/planet/frontend/src/pages/Playground/Playground.tsx) by extracting repeated lookup, response, and request-action paths into shared helpers, reducing duplicated Playground flow code without changing behavior.
+- Improved [rules.md](/home/ray/dev/linkong/planet/rules.md) by adding a new `Code Hygiene - MANDATORY` section covering single-source-of-truth state, transitional cleanup, repeated-logic extraction, layout debugging order, and post-feature cleanup expectations.
+
+### Fixed
+
+- Fixed [frontend/src/components/AppLayout/AppLayout.tsx](/home/ray/dev/linkong/planet/frontend/src/components/AppLayout/AppLayout.tsx) so first-level menu expansion now behaves correctly across in-app navigation: `采集与数据` remains the default expanded group after refresh, while manually expanded groups stay open when navigating to their own child routes and reset only on page reload.
+
 ## 0.25.0
 
 Released: 2026-04-10

docs/version-history.md

@@ -16,7 +16,7 @@
 ## Current Version
 
 - `main` 当前主线历史推导到：`0.16.5`
-- `dev` 当前开发分支历史推导到：`0.25.0`
+- `dev` 当前开发分支历史推导到：`0.25.1`
 
 ## Timeline
 
@@ -82,6 +82,7 @@
 | `0.24.7` | bugfix | `dev` | `pending` | formalize release workflow and frontend layout constraints with repo rules and a reusable release skill |
 | `0.24.8` | bugfix | `dev` | `pending` | move BGP brief markdown into a dedicated modal, keep tab content metadata-focused, and constrain modal scrolling to the viewport |
 | `0.25.0` | feature | `dev` | `89a71e6f` | add persistent backend-backed AI Playground chat state, split alert workspaces into dedicated pages, and establish the situational-awareness foundation for later multi-signal analysis |
+| `0.25.1` | bugfix | `dev` | `pending` | clean duplicated Playground flow code, add reusable code-hygiene rules, and fix first-level sidebar menu expansion behavior across route navigation and refresh |
 
 ## Maintenance Commits Not Counted as Version Bumps