refactor(login): compose page from focused login components

Split the login page into smaller reusable components for branding,
toolbar, header, form, announcements, and mobile layout behavior. This
keeps the view responsible for orchestration while moving UI sections into
focused components.

Update page creation docs to reflect the simplified flow where views render
sections/items directly and composables coordinate store/service access when
needed.refactor(login): compose page from focused login components

Split the login page into smaller reusable components for branding,
toolbar, header, form, announcements, and mobile layout behavior. This
keeps the view responsible for orchestration while moving UI sections into
focused components.

Update page creation docs to reflect the simplified flow where views render
sections/items directly and composables coordinate store/service access when
needed.

src/README.md

@@ -84,7 +84,7 @@ Layout composables：
 
 `src/router/routes.ts` 是功能開發時可新增 route 的入口，但不要改壞既有 layout meta、auth meta 與 catch-all route 規則。
 
-登入 route 入口是 `src/views/Login.vue`。若只是調整登入畫面內容，優先修改 `src/components/PageLogin.vue` 與 `src/components/login/*`。
+登入 route 入口是 `src/views/Login.vue`。若只是調整登入畫面內容，優先修改 `src/views/Login.vue` 與 `src/components/login/*`。
 
 `src/services/modules/auth.ts` 與 `src/services/modules/menu.ts` 是預設後端契約的 API adapter。接新後端時常需要調整，但不要把 UI 狀態放進 service module。
 
@@ -93,11 +93,11 @@ Layout composables：
 以下內容偏向示範資料與範例頁，建立新專案時可依需求替換或刪除：
 
 - `src/views/Home.vue`
-- `src/components/PageIndex.vue`
+
 - `src/views/maint/*`
 - `src/components/maint/*`
 - `src/composables/maint/*`
-- `src/components/PageMaint.vue`
+- `src/components/MaintShell.vue`
 - `src/stores/students.ts`
 - `src/stores/semesters.ts`
 - `src/views/FncPage.vue`