# Sidebar Active State And Management UX Cleanup

## Goal

Fix several visible JSP/CSS navigation and layout issues in the authenticated library-management UI, and reduce confusion between reader profile management and user account management without changing the backend data model.

## What I Already Know

* The application is a Java 11 Maven WAR using JSP, Servlet, JSTL, CSS, and Tomcat.
* Authenticated navigation lives in `src/main/webapp/WEB-INF/jsp/common/header.jspf`.
* Sidebar active state currently uses `fn:contains(currentUri, ...)`, but rendered JSP paths can differ from public servlet paths after `RequestDispatcher.forward`.
* This explains reported false positives and false negatives:
  * `/catalog` can render through `/WEB-INF/jsp/books/catalog.jsp`, causing the books nav item to look active.
  * `/book-categories` renders through `/WEB-INF/jsp/books/categories.jsp`, causing books to look active while categories may not.
  * `/reports` renders `reports/dashboard.jsp`, which can make dashboard/workbench look active.
  * `/admin/system-logs` renders `maintenance/system-logs.jsp`, so the system log item may not activate.
* The catalog, book management, and reader management hero sections put eyebrow/title/body/actions directly under a flex container; pages that wrap text in a child `<div>` avoid the horizontal layout break.
* `dashboard.jsp` contains the small technical sentence the user wants removed.
* `ReaderManagementServlet` manages reader profiles/eligibility/contact/borrowing limits; `UserManagementServlet` manages login accounts/roles/active status. These are overlapping concepts to users but distinct backend workflows.

## Requirements

* Sidebar active state must be based on the original public servlet path, not the forwarded JSP path.
* Only the matching sidebar item should be active for catalog, books, book categories, reports, and system logs.
* Remove the sidebar "角色工作台" block.
* Remove the sidebar "工作台" nav item.
* Move "报表中心" to the top of the main module navigation for administrator/librarian roles.
* Fix the header/hero layout on catalog, book management, and reader management so eyebrow/title/description stay grouped vertically.
* Remove the dashboard sentence: `登录后进入 Dashboard，会话仅保存安全的 AuthenticatedUser 快照、角色代码与权限代码集合。`
* Reduce the perceived duplication between reader management and user management using conservative UI changes:
  * Treat reader management as reader profile/borrowing eligibility management.
  * Treat user management as account/role/login status management.
  * Prefer clearer labels, descriptions, and cross-links over merging backend flows.

## Acceptance Criteria

* [x] Opening `/catalog` highlights only "馆藏检索".
* [x] Opening `/books` highlights only "图书管理".
* [x] Opening `/book-categories` highlights only "图书分类管理".
* [x] Opening `/reports` highlights only "报表中心" and does not highlight "工作台".
* [x] Opening `/admin/system-logs` highlights "系统日志".
* [x] The sidebar no longer displays the role workbench cards or a "工作台" nav item.
* [x] "报表中心" appears before catalog/books/readers/borrowing for administrator/librarian navigation.
* [x] Catalog, book management, and reader management hero copy is vertically grouped and does not lay out as separate horizontal items.
* [x] The dashboard technical session sentence is absent.
* [x] Reader/user management labels and descriptions make the distinction between reader profiles and user accounts clearer.
* [x] Maven verification passes or the closest available build command is reported.

## Definition Of Done

* Focused JSP/CSS changes only unless a backend change is required by verification.
* Existing Servlet/JSP rendering and JSTL escaping behavior remains intact.
* Maven build/test verification run where available.
* Trellis quality check completed before final response.

## Technical Approach

* In `header.jspf`, derive a `currentPath` from `requestScope['javax.servlet.forward.servlet_path']` with a fallback to `pageContext.request.servletPath`.
* Replace broad `fn:contains` checks with exact or prefix checks against public servlet paths.
* Reorder and trim sidebar markup according to the requested information architecture.
* Wrap catalog/book/reader hero text in a child `<div>` to match pages that already render correctly.
* Remove only the requested dashboard small text, leaving role-specific workbench headings and metrics intact.
* Use copy changes and cross-links to clarify reader profiles versus user accounts without changing controllers, entities, DAOs, or database schema.

## Out Of Scope

* Merging reader and user management into a single page.
* Changing authentication, authorization, database schema, or service-layer behavior.
* Redesigning the whole dashboard or adding new frontend libraries.

## Technical Notes

* Relevant frontend spec index: `.trellis/spec/frontend/index.md`.
* Relevant files inspected:
  * `src/main/webapp/WEB-INF/jsp/common/header.jspf`
  * `src/main/webapp/WEB-INF/jsp/dashboard.jsp`
  * `src/main/webapp/WEB-INF/jsp/books/catalog.jsp`
  * `src/main/webapp/WEB-INF/jsp/books/manage.jsp`
  * `src/main/webapp/WEB-INF/jsp/books/categories.jsp`
  * `src/main/webapp/WEB-INF/jsp/readers/manage.jsp`
  * `src/main/webapp/WEB-INF/jsp/admin/users/manage.jsp`
  * `src/main/webapp/static/css/app.css`
* Build command from README: `mvn clean package`; fallback path documented as `/home/sjy/.sdkman/candidates/maven/current/bin/mvn clean package` if `mvn` is not on `PATH`.
* Verification on 2026-04-28:
  * `git diff --check` passed.
  * Search for removed sidebar role/workbench and old active-state patterns returned no matches.
  * `/home/sjy/.sdkman/candidates/maven/current/bin/mvn clean package` passed with `BUILD SUCCESS`.