docs: update LLM guides for completed architecture phase

Refresh the development guidance to point to layered src GUIDE files
and document Phase 4 completion, including AppShell extraction and
page driver/component adoption for non-maintenance pages.docs: update LLM guides for completed architecture phase

Refresh the development guidance to point to layered src GUIDE files
and document Phase 4 completion, including AppShell extraction and
page driver/component adoption for non-maintenance pages.

src/views/GUIDE.md

@@ -0,0 +1,32 @@
+# Views Guide
+
+`views` 是 route entry。View 應維持薄層，負責掛載 page driver 與 page component，不承載大段 UI、dialog、表單欄位或 store mutation 細節。
+
+## 規則
+
+- 使用 `<script setup lang="ts">`。
+- 直接 route component 放在 `src/views` 或 `src/views/<feature>`。
+- 一般 view 目標 < 80 行。
+- route params/query 的解析可在 view 做簡單轉換；超過簡單轉換時放進 page driver。
+- 不直接 import 或包住 `MainLayout.vue`。
+- 不直接定義大型 `<v-dialog>`、`<v-overlay>`、大型表格或大型表單。
+
+## 建議形狀
+
+```vue
+<script setup lang="ts">
+import PageReports from '@/components/pages/PageReports.vue'
+import { useReportsPage } from '@/composables/page-drivers/useReportsPage'
+
+const page = useReportsPage()
+</script>
+
+<template>
+  <PageReports :page="page.pageModel.value" />
+</template>
+```
+
+## 子目錄
+
+- `views/maint` 是 maintenance demo route entry。詳見 `src/views/maint/GUIDE.md`。
+- `views/errors` 是錯誤頁入口，通常使用 `meta.layout = 'none'`。