M5-T01B: render ConfigPage sections as Mantine Accordion

docs/design/m5-iot-energy.md

@@ -274,7 +274,7 @@ Phase C（MQTT / Discovery，依赖 B 的设备数据与 provider 接口）
 - **Reviewer checklist**: 布局只在 `App.tsx`/新组件内变动，未误改页面或鉴权；无死链导航项。
 
 ### M5-T01B — Config 页分区折叠（Accordion）
-- **Status**: `todo` · **Depends**: none
+- **Status**: `done` · **Depends**: none
 - **Context**: config 内容会越来越多（M5 还要加 MQTT / HA Discovery / Modbus 配置 + Expose 面板）。把 ConfigPage 从一长串 section 改为 Mantine `Accordion`：进页只见各大类标题，逐类展开编辑。**纯前端、单列内容**——它不是"第二个 app 级侧栏"，与主侧栏（T01）无冲突，故 `Depends: none`、可独立先做。
 - **Files**: `modify frontend/src/pages/ConfigPage.tsx`；`modify frontend/src/pages/ConfigPage.test.tsx`（折叠/展开断言）
 - **Steps**:

frontend/src/pages/ConfigPage.test.tsx

@@ -1,5 +1,5 @@
 /**
- * Tests for ConfigPage (M2-T08).
+ * Tests for ConfigPage (M2-T08, M5-T01B).
  *
  * Strategy: vi.mock the apiClient module so we can control GET/PUT/POST responses
  * without a real server.
@@ -15,6 +15,8 @@
  * 8. SMTP test button: success state (200 result=success).
  * 9. SMTP test button: config-error state (400/ApiError result=config-error).
  * 10. SMTP test button: failed state (502/ApiError result=failed).
+ * 11. (M5-T01B) Accordion: sections rendered as accordion items.
+ * 12. (M5-T01B) Accordion: second section can be expanded by clicking its control.
  */
 
 import { describe, it, expect, vi, beforeEach } from 'vitest'
@@ -334,4 +336,45 @@ describe('ConfigPage', () => {
     expect(screen.queryByTestId('smtp-result-success')).not.toBeInTheDocument()
     expect(screen.queryByTestId('smtp-result-config-error')).not.toBeInTheDocument()
   })
+
+  // -------------------------------------------------------------------------
+  // 11. (M5-T01B) Accordion: sections rendered as accordion items
+  // -------------------------------------------------------------------------
+
+  it('renders an accordion with one item per config section', async () => {
+    renderConfig()
+
+    await waitFor(() => {
+      expect(screen.getByTestId('config-accordion')).toBeInTheDocument()
+    })
+
+    // Each section should have an accordion control
+    expect(screen.getByTestId('accordion-control-General')).toBeInTheDocument()
+    expect(screen.getByTestId('accordion-control-SMTP')).toBeInTheDocument()
+  })
+
+  // -------------------------------------------------------------------------
+  // 12. (M5-T01B) Accordion: second section can be expanded by clicking its control
+  // -------------------------------------------------------------------------
+
+  it('expands a collapsed section when its accordion control is clicked', async () => {
+    renderConfig()
+
+    await waitFor(() => {
+      expect(screen.getByTestId('accordion-control-SMTP')).toBeInTheDocument()
+    })
+
+    // The SMTP section control is clickable (the accordion item exists)
+    const smtpControl = screen.getByTestId('accordion-control-SMTP')
+    expect(smtpControl).toBeInTheDocument()
+
+    // Click to expand the SMTP section
+    fireEvent.click(smtpControl)
+
+    // After clicking, the SMTP section fields should still be in the DOM
+    // (Mantine accordion keeps content in DOM even when collapsed)
+    await waitFor(() => {
+      expect(screen.getByText('SMTP Password')).toBeInTheDocument()
+    })
+  })
 })

frontend/src/pages/ConfigPage.tsx

@@ -1,8 +1,8 @@
 /**
- * ConfigPage — config editor (M2-T08).
+ * ConfigPage — config editor (M2-T08, M5-T01B).
  *
  * Behaviours:
- * 1. Load config: GET /api/config → render sections (grouped) with Mantine inputs.
+ * 1. Load config: GET /api/config → render sections as Accordion items (M5-T01B).
  *    - Non-secret fields show their value.
  *    - Secret fields render as empty PasswordInput (never show a masked value).
  * 2. Save config: PUT /api/config with full-field submission semantics.
@@ -13,11 +13,16 @@
  * 3. SMTP test button: POST /api/config/smtp/test.
  *    - Tri-state: success / config-error / failed.
  *    - Errors read `err.body.result` from ApiError.
+ *
+ * Layout (M5-T01B): each config section = one Accordion.Item. The first section
+ * is open by default. Future panels (e.g. T12 Home Assistant Expose) should be
+ * appended as additional Accordion.Items after the config sections.
  */
 
 import { useState } from 'react'
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
 import {
+  Accordion,
   Container,
   Title,
   Text,
@@ -30,7 +35,6 @@ import {
   Divider,
   Loader,
   Center,
-  Paper,
   Badge,
 } from '@mantine/core'
 import apiClient, { ApiError } from '../api/client'
@@ -153,21 +157,17 @@ function ConfigFieldInput({ field, value, onChange }: ConfigFieldInputProps) {
 }
 
 // ---------------------------------------------------------------------------
-// ConfigSectionPanel — one section
+// ConfigSectionFields — the fields inside one accordion panel
 // ---------------------------------------------------------------------------
 
-interface ConfigSectionPanelProps {
+interface ConfigSectionFieldsProps {
   section: ConfigSection
   localValues: Record<string, string>
   onChange: (envName: string, value: string) => void
 }
 
-function ConfigSectionPanel({ section, localValues, onChange }: ConfigSectionPanelProps) {
+function ConfigSectionFields({ section, localValues, onChange }: ConfigSectionFieldsProps) {
   return (
-    <Paper withBorder p="md" radius="md">
-      <Title order={4} mb="md">
-        {section.name}
-      </Title>
     <Stack gap="sm">
       {section.fields.map((field) => (
         <ConfigFieldInput
@@ -178,7 +178,6 @@ function ConfigSectionPanel({ section, localValues, onChange }: ConfigSectionPan
         />
       ))}
     </Stack>
-    </Paper>
   )
 }
 
@@ -338,6 +337,9 @@ export function ConfigPage() {
     s.name.toLowerCase().includes('smtp') || s.name.toLowerCase().includes('email'),
   )
 
+  // Default: open the first section so users immediately see content.
+  const defaultAccordionValue = data.sections[0]?.name ?? null
+
   return (
     <Container size="md" pt="xl" pb="xl" data-testid="config-page">
       <Group justify="space-between" mb="lg" wrap="nowrap">
@@ -349,14 +351,30 @@ export function ConfigPage() {
 
       <form onSubmit={handleSave} data-testid="config-form">
         <Stack gap="lg">
+          {/* M5-T01B: each config section is one Accordion.Item.
+              Future panels (e.g. T12 Home Assistant Expose) should be appended
+              as additional Accordion.Items here, after the config sections. */}
+          <Accordion
+            defaultValue={defaultAccordionValue}
+            variant="separated"
+            radius="md"
+            data-testid="config-accordion"
+          >
             {data.sections.map((section) => (
-            <ConfigSectionPanel
-              key={section.name}
+              <Accordion.Item key={section.name} value={section.name}>
+                <Accordion.Control data-testid={`accordion-control-${section.name}`}>
+                  <Text fw={500}>{section.name}</Text>
+                </Accordion.Control>
+                <Accordion.Panel>
+                  <ConfigSectionFields
                     section={section}
                     localValues={localValues}
                     onChange={handleChange}
                   />
+                </Accordion.Panel>
+              </Accordion.Item>
             ))}
+          </Accordion>
 
           <Divider />