# 17 - Dashboard Design

## 17.1 Overview

The dashboard is a web-based management interface for OpenWA that lets users manage sessions, webhooks, and monitor activity without using the API directly.

### Tech Stack

```mermaid
flowchart LR
    subgraph Frontend
        REACT[React 19]
        VITE[Vite 8]
        TS[TypeScript]
        CSS[Hand-written per-page CSS]
        LUCIDE[lucide-react Icons]
    end

    subgraph State
        TANSTACK[TanStack Query]
        CTX[React Context]
    end

    subgraph Backend
        API[OpenWA API]
        WS[socket.io WebSocket]
    end

    Frontend --> State
    State --> Backend
```

The styling foundation is **plain CSS** — there is no Tailwind, no shadcn/ui, and no CSS-in-JS.
Every page — and most shared components — ships its own stylesheet colocated beside the source
(`Sessions.tsx` + `Sessions.css`, `Layout.tsx` + `Layout.css`, ...), imported directly by the
component (see §17.4 for the handful that carry no stylesheet of their own). Icons come from
`lucide-react`; charts from `recharts`; i18n from `react-i18next`.
Client state is **TanStack Query** for server data (see `src/hooks/queries.ts`) plus two small React
Context providers (`RoleProvider`, `ToastProvider`); theme mode is a provider-less `useTheme` hook
backed by `localStorage` — there is no Zustand store.

### Design Principles

1. **Minimalist** - Clean, uncluttered interface
2. **Responsive** - Works on desktop and mobile
3. **Real-time** - Live updates via WebSocket
4. **Accessible** - built to WCAG 2.1 AA as the target. Shipped: full keyboard reachability of
   the chat/channel/status lists (role, focus, Enter/Space activation), focus-visible styling, the
   form labels in the settings and config surfaces associated with their controls via `htmlFor`/`id`,
   toggle switches and button groups that expose an accessible name and their selected state, and a
   muted-text token that meets AA on both themes. `dashboard/src/a11y-controls.test.ts` fails the
   build when a toggle switch, a button toggle-group or a plugin config field loses its name; other
   control shapes are not covered by it.
   Brand and status colours are split in two: `--primary`, `--error`, `--success` and `--warning` are
   fill colours for buttons, borders and tints, and `--primary-text`, `--error-text`, `--success-text`
   and `--warning-text` are darkened twins for anything rendered as text or an icon. As foregrounds
   the originals measure 1.98:1, 3.76:1, 2.28:1 and 2.15:1 on white. Each twin is set from the
   darkest surface it actually lands on, which is the 10 to 20 percent tint of its own hue that the
   badges and callouts paint behind it, not white. Dark restates them as the originals, which are
   already 6:1 or better on the dark surfaces.
   Known gap: the exclusive button groups report `aria-pressed` without arrow-key roving focus. Four
   pages have a render harness, so the rest are checked structurally. Treat the claim as directional,
   not certified.
5. **Dark mode** - Support for light/dark themes

## 17.2 Information Architecture

The dashboard is a **flat, single-level route table** (see `src/App.tsx`). Each sidebar entry maps
to one top-level page — there are no nested detail/`:id` routes; a session or chat is opened in-place
(modals / split panes) rather than via its own URL.

```mermaid
flowchart TB
    subgraph "Always visible"
        HOME[Dashboard /]
        SESSIONS[Sessions /sessions]
        CHATS[Chats /chats]
        WEBHOOKS[Webhooks /webhooks]
        TEMPLATES[Templates /templates]
        TESTER[Message Tester /message-tester]
        LOGS[Logs /logs]
    end

    subgraph "Admin-only"
        APIKEYS[API Keys /api-keys]
        INFRA[Infrastructure /infrastructure]
        PLUGINS[Plugins /plugins]
    end

    HOME --> SESSIONS
    HOME --> CHATS
    SESSIONS --> CHATS
```

### Navigation Structure

The route table lives in `src/App.tsx`; the sidebar items in `src/components/Layout.tsx`. Routes
guarded by `role === 'admin'` are only mounted (and only shown in the sidebar) for an admin key —
a non-admin hitting the path falls through to the `*` redirect.

```
/                  → Dashboard (overview + charts)
/sessions          → Sessions (create / start / stop / QR / delete)
/chats             → Chats (Chats / Channels / Status tabs; chat list + message thread live via
                     WebSocket; read-only channel feed on whatsapp-web.js)
/webhooks          → Webhooks (per-session webhook endpoints)
/templates         → Message Templates
/message-tester    → Message Tester (ad-hoc send-* + check-number)
/logs              → Activity / Audit Logs
/api-keys          → API Keys Management              [admin only]
/infrastructure    → Infrastructure status & config   [admin only]
/plugins           → Plugins (install / enable / configure) [admin only]
*                  → redirect to /
```

> There is **no Settings page** and no `/sessions/:id`, `/sessions/:id/chat`, or `/webhooks/:id`
> route. Theme (light/dark/system) is a one-click toggle in the sidebar footer (`Layout.tsx`),
> persisted client-side by the `useTheme` hook.

## 17.3 Wireframes

### Dashboard Home

```
┌─────────────────────────────────────────────────────────────────────┐
│  🔵 OpenWA                              🔍 Search    👤 Admin    ☀️  │
├─────────────────────────────────────────────────────────────────────┤
│                                                                      │
│  ┌─────────────┬─────────────┬─────────────┬─────────────┐          │
│  │   📱 5      │   ✅ 4      │   📨 1,234  │   🔗 3      │          │
│  │  Sessions   │  Connected  │   Messages  │  Webhooks   │          │
│  │             │             │   (Today)   │   Active    │          │
│  └─────────────┴─────────────┴─────────────┴─────────────┘          │
│                                                                      │
│  ┌──────────────────────────────────┐ ┌────────────────────────┐    │
│  │  Sessions Overview               │ │  Recent Activity       │    │
│  │  ┌──────┬──────┬──────┬──────┐  │ │                        │    │
│  │  │ 🟢   │ 🟢   │ 🟢   │ 🟡   │  │ │  10:30 Message sent    │    │
│  │  │ CS-1 │ CS-2 │ Sales│ Supp │  │ │  10:28 Webhook called  │    │
│  │  │ 123  │ 456  │  789 │  -   │  │ │  10:25 Session online  │    │
│  │  └──────┴──────┴──────┴──────┘  │ │  10:20 Message recv    │    │
│  │                                  │ │  10:15 QR scanned      │    │
│  │  [+ New Session]                 │ │                        │    │
│  └──────────────────────────────────┘ │  [View All →]          │    │
│                                        └────────────────────────┘    │
│                                                                      │
│  ┌──────────────────────────────────────────────────────────────┐   │
│  │  Message Volume (Last 7 Days)                                 │   │
│  │  ┌────────────────────────────────────────────────────────┐  │   │
│  │  │    ▓▓                                                   │  │   │
│  │  │    ▓▓     ▓▓                      ▓▓                   │  │   │
│  │  │    ▓▓     ▓▓  ▓▓            ▓▓    ▓▓                   │  │   │
│  │  │ ▓▓▓▓  ▓▓  ▓▓  ▓▓  ▓▓  ▓▓  ▓▓    ▓▓  ▓▓               │  │   │
│  │  │ Mon   Tue Wed Thu Fri  Sat Sun                         │  │   │
│  │  └────────────────────────────────────────────────────────┘  │   │
│  └──────────────────────────────────────────────────────────────┘   │
│                                                                      │
└─────────────────────────────────────────────────────────────────────┘
```

### Session List

```
┌─────────────────────────────────────────────────────────────────────┐
│  ← Sessions                                        [+ New Session]   │
├─────────────────────────────────────────────────────────────────────┤
│                                                                      │
│  🔍 Search sessions...              Filter: [All ▾] [Status ▾]      │
│                                                                      │
│  ┌───────────────────────────────────────────────────────────────┐  │
│  │ ● Customer Support 1                              🟢 Connected │  │
│  │   📱 +62 812-3456-789                                          │  │
│  │   📨 1,234 messages | Last active: 2 min ago                   │  │
│  │   ─────────────────────────────────────────────────────────── │  │
│  │   [📷 QR] [💬 Test Chat] [⚙️ Settings] [🗑️ Delete]             │  │
│  └───────────────────────────────────────────────────────────────┘  │
│                                                                      │
│  ┌───────────────────────────────────────────────────────────────┐  │
│  │ ● Sales Bot                                       🟢 Connected │  │
│  │   📱 +62 821-9876-543                                          │  │
│  │   📨 567 messages | Last active: 5 min ago                     │  │
│  │   ─────────────────────────────────────────────────────────── │  │
│  │   [📷 QR] [💬 Test Chat] [⚙️ Settings] [🗑️ Delete]             │  │
│  └───────────────────────────────────────────────────────────────┘  │
│                                                                      │
│  ┌───────────────────────────────────────────────────────────────┐  │
│  │ ○ Support Backup                              🟡 Disconnected  │  │
│  │   📱 Not connected                                             │  │
│  │   📨 0 messages | Never active                                 │  │
│  │   ─────────────────────────────────────────────────────────── │  │
│  │   [📷 Scan QR] [⚙️ Settings] [🗑️ Delete]                       │  │
│  └───────────────────────────────────────────────────────────────┘  │
│                                                                      │
│  ────────────────────────────────────────────────────────────────   │
│  Showing 3 of 3 sessions                              [◀] 1 [▶]     │
│                                                                      │
└─────────────────────────────────────────────────────────────────────┘
```

### Session Detail

```
┌─────────────────────────────────────────────────────────────────────┐
│  ← Sessions / Customer Support 1                    🟢 Connected     │
├─────────────────────────────────────────────────────────────────────┤
│                                                                      │
│  ┌─────────────────────────────────────────────────────────────┐    │
│  │  ┌─────────┐                                                │    │
│  │  │  👤     │  Customer Support 1                            │    │
│  │  │ Avatar  │  +62 812-3456-789                              │    │
│  │  │         │  Status: 🟢 Connected                          │    │
│  │  └─────────┘  Platform: Android                             │    │
│  │                                                              │    │
│  │  [Restart Session] [Unlink Device] [Delete]                  │    │
│  └─────────────────────────────────────────────────────────────┘    │
│                                                                      │
│  Unlink Device attempts an engine-native unlink of this companion   │
│  device (POST /sessions/:sessionId/logout), then stops the          │
│  session. A 200 means the unlink + local cleanup completed (not an  │
│  independent Linked-Devices observation) — reconnecting then        │
│  requires a fresh QR scan or pairing code. A 502                    │
│  (SESSION_LOGOUT_INCOMPLETE) stops locally but leaves the           │
│  operation incomplete; retry after starting. Delete only clears     │
│  the local data; it does NOT unlink.                                │
│                                                                      │
│  ┌─────────────────────┬─────────────────────┐                      │
│  │  📊 Statistics      │  ⚙️ Configuration    │                      │
│  ├─────────────────────┼─────────────────────┤                      │
│  │                     │                     │                      │
│  │  Messages Sent      │  Auto Reconnect     │                      │
│  │  ████████░░ 1,234   │  [✓] Enabled        │                      │
│  │                     │                     │                      │
│  │  Messages Received  │  Webhook URL        │                      │
│  │  ██████████ 2,567   │  https://...        │                      │
│  │                     │                     │                      │
│  │  Webhook Calls      │  Proxy              │                      │
│  │  ███████░░░   890   │  None               │                      │
│  │                     │                     │                      │
│  │  Uptime             │  Created            │                      │
│  │  99.9% (30 days)    │  2026-01-15         │                      │
│  │                     │                     │                      │
│  └─────────────────────┴─────────────────────┘                      │
│                                                                      │
│  ┌─────────────────────────────────────────────────────────────┐    │
│  │  Recent Messages                          [View All →]      │    │
│  │  ───────────────────────────────────────────────────────── │    │
│  │  → +62 821... | Hello, how can I help?     | 10:30 ✓✓      │    │
│  │  ← +62 821... | I need product info        | 10:28          │    │
│  │  → +62 821... | Sure! Here's our catalog   | 10:25 ✓✓      │    │
│  │  ← +62 813... | Thanks for your help!      | 10:20          │    │
│  └─────────────────────────────────────────────────────────────┘    │
│                                                                      │
│  [💬 Open Test Chat]                                                 │
│                                                                      │
└─────────────────────────────────────────────────────────────────────┘
```

### QR Code Scanner

```
┌─────────────────────────────────────────────────────────────────────┐
│                          Scan QR Code                                │
├─────────────────────────────────────────────────────────────────────┤
│                                                                      │
│                    ┌─────────────────────────┐                       │
│                    │                         │                       │
│                    │   ████████████████████  │                       │
│                    │   ██              ████  │                       │
│                    │   ██  ██████████  ████  │                       │
│                    │   ██  ██      ██  ████  │                       │
│                    │   ██  ██      ██  ████  │                       │
│                    │   ██  ██      ██  ████  │                       │
│                    │   ██  ██████████  ████  │                       │
│                    │   ██              ████  │                       │
│                    │   ████████████████████  │                       │
│                    │                         │                       │
│                    └─────────────────────────┘                       │
│                                                                      │
│                    Expires in: 0:45                                  │
│                                                                      │
│     ──────────────────────────────────────────────────────          │
│                                                                      │
│     1. Open WhatsApp on your phone                                   │
│     2. Tap Menu ⋮ or Settings ⚙                                     │
│     3. Tap Linked Devices                                            │
│     4. Tap Link a Device                                             │
│     5. Point your phone at this screen                               │
│                                                                      │
│     ──────────────────────────────────────────────────────          │
│                                                                      │
│                    [Refresh QR] [Cancel]                             │
│                                                                      │
└─────────────────────────────────────────────────────────────────────┘
```

### Test Chat Interface

```
┌─────────────────────────────────────────────────────────────────────┐
│  ← Test Chat                              Session: Customer Support  │
├─────────────────────────────────────────────────────────────────────┤
│                                                                      │
│  ┌──────────────────────┐ ┌────────────────────────────────────┐    │
│  │  Contacts            │ │  +62 821-9876-543                  │    │
│  │  ──────────────────  │ │  John Doe                          │    │
│  │                      │ ├────────────────────────────────────┤    │
│  │  🔍 Search...        │ │                                    │    │
│  │                      │ │  ┌──────────────────────────────┐ │    │
│  │  ┌────────────────┐  │ │  │ Hello! How can I help you?  │ │    │
│  │  │ 👤 John Doe    │  │ │  │                    10:30 ✓✓ │ │    │
│  │  │    Last: Hi!   │  │ │  └──────────────────────────────┘ │    │
│  │  └────────────────┘  │ │                                    │    │
│  │                      │ │      ┌─────────────────────────┐   │    │
│  │  ┌────────────────┐  │ │      │ I need help with my    │   │    │
│  │  │ 👤 Jane Smith  │  │ │      │ order #12345           │   │    │
│  │  │    Last: OK    │  │ │      │              10:31     │   │    │
│  │  └────────────────┘  │ │      └─────────────────────────┘   │    │
│  │                      │ │                                    │    │
│  │  ┌────────────────┐  │ │  ┌──────────────────────────────┐ │    │
│  │  │ 👤 Bob Wilson  │  │ │  │ Sure! Let me check that    │ │    │
│  │  │    Last: Thx   │  │ │  │ for you. One moment...     │ │    │
│  │  └────────────────┘  │ │  │                    10:32 ✓✓ │ │    │
│  │                      │ │  └──────────────────────────────┘ │    │
│  │                      │ │                                    │    │
│  │  ──────────────────  │ ├────────────────────────────────────┤    │
│  │  [+ New Chat]        │ │  📎 [                        ] 📤  │    │
│  └──────────────────────┘ │     Type a message...              │    │
│                           └────────────────────────────────────┘    │
│                                                                      │
└─────────────────────────────────────────────────────────────────────┘
```

### Webhook Management

```
┌─────────────────────────────────────────────────────────────────────┐
│  ← Webhooks                                      [+ New Webhook]     │
├─────────────────────────────────────────────────────────────────────┤
│                                                                      │
│  ┌───────────────────────────────────────────────────────────────┐  │
│  │  🔗 Main Webhook                                   ✅ Active   │  │
│  │  https://api.example.com/webhook/openwa                        │  │
│  │  Events: message.received, message.ack, session.status         │  │
│  │  Sessions: All                                                 │  │
│  │  ──────────────────────────────────────────────────────────── │  │
│  │  Success Rate: 99.8% | Avg Latency: 125ms | Last: 2 min ago   │  │
│  │  [Test] [View Logs] [Edit] [Disable]                          │  │
│  └───────────────────────────────────────────────────────────────┘  │
│                                                                      │
│  ┌───────────────────────────────────────────────────────────────┐  │
│  │  🔗 Analytics Webhook                              ✅ Active   │  │
│  │  https://analytics.example.com/track                           │  │
│  │  Events: message.received                                      │  │
│  │  Sessions: cs-1, sales                                         │  │
│  │  ──────────────────────────────────────────────────────────── │  │
│  │  Success Rate: 100% | Avg Latency: 89ms | Last: 5 min ago     │  │
│  │  [Test] [View Logs] [Edit] [Disable]                          │  │
│  └───────────────────────────────────────────────────────────────┘  │
│                                                                      │
│  ┌───────────────────────────────────────────────────────────────┐  │
│  │  🔗 Backup Webhook                              ⏸️ Disabled    │  │
│  │  https://backup.example.com/wa                                 │  │
│  │  Events: message.received, message.ack                         │  │
│  │  Sessions: All                                                 │  │
│  │  ──────────────────────────────────────────────────────────── │  │
│  │  [Enable] [Edit] [Delete]                                     │  │
│  └───────────────────────────────────────────────────────────────┘  │
│                                                                      │
└─────────────────────────────────────────────────────────────────────┘
```

## 17.4 Component Library

> **No component framework is installed.** shadcn/ui is _not_ adopted — there is no `npx shadcn`
> init, no `components/ui/` directory, no `cn()` utility, and no `@/components` import alias. The
> wireframes above are design intent; the implementation is hand-written.

### Bespoke components

The UI is built from a small set of project-specific components under `dashboard/src/components/`,
most with a colocated CSS file. Five ship none: `ErrorBoundary` styles inline via `style={{...}}`,
`GithubIcon` carries no styling beyond `fill="currentColor"`, `Modal` reuses the global `.modal-*`
rules from `index.css`, and the `chats/` pair take their classes from the page stylesheet
(`pages/Chats.css`) plus the `yet-another-react-lightbox` vendor CSS. There is no design-system
package to pull from.

| Component                    | File                             | Responsibility                                                                                                        |
| ---------------------------- | -------------------------------- | --------------------------------------------------------------------------------------------------------------------- |
| `Layout`                     | `components/Layout.tsx`          | App shell: collapsible sidebar nav, mobile drawer, language menu, light/dark theme toggle, logout, live version badge |
| `ToastProvider` / `useToast` | `components/Toast.tsx`           | Context-based toast notifications (success/error/warning/info) with de-dup keys                                       |
| `PageHeader`                 | `components/PageHeader.tsx`      | Shared page title / subtitle / badge / actions header                                                                 |
| `Modal`                      | `components/Modal.tsx`           | Accessible dialog (`role="dialog"`, Escape/overlay close, focus trap + restore); uses the global `.modal-*` styles    |
| `CustomSelect`               | `components/CustomSelect.tsx`    | Keyboard-navigable select replacement (type-ahead, arrow keys) used by Sessions / Logs / Login                        |
| `DashboardCharts`            | `components/DashboardCharts.tsx` | `recharts`-based message-volume / activity charts on the Dashboard                                                    |
| `FilterBuilder`              | `components/FilterBuilder.tsx`   | Visual condition builder for webhook event filters                                                                    |
| `GlobalSearch`               | `components/GlobalSearch.tsx`    | Debounced message-search box in the Chats header, with all-sessions / current-session scope                           |
| `PluginInstances`            | `components/PluginInstances.tsx` | Per-plugin instance list: create / edit / delete and secret regeneration                                              |
| `ErrorBoundary`              | `components/ErrorBoundary.tsx`   | Top-level React error boundary wrapping the whole app                                                                 |
| `GithubIcon`                 | `components/GithubIcon.tsx`      | Inline brand SVG                                                                                                      |

Chat-specific pieces live one level down in `components/chats/`: `MessageBody` (WhatsApp text
formatting + link detection) and `MediaLightbox` (the media viewer, built on
`yet-another-react-lightbox`).

Pages live under `dashboard/src/pages/`, each as a `*.tsx` + `*.css` pair (e.g. `Sessions.tsx` +
`Sessions.css`). Pages are lazy-loaded in `App.tsx` via `React.lazy` + `Suspense`.

A representative bespoke component — the shared page header — shows the actual conventions
(plain props, a colocated stylesheet, BEM-ish class names, no utility classes):

```typescript
// components/PageHeader.tsx
import type { ReactNode } from 'react';
import './PageHeader.css';

interface PageHeaderProps {
  title: string;
  subtitle?: string;
  badge?: ReactNode;
  actions?: ReactNode;
}

export function PageHeader({ title, subtitle, badge, actions }: PageHeaderProps) {
  return (
    <header className="page-header">
      <div className="page-header__title-group">
        <h1>{title}</h1>
        {badge && <span className="page-header__badge">{badge}</span>}
      </div>
      {actions && <div className="page-header__actions">{actions}</div>}
      {subtitle && <p className="page-header__subtitle">{subtitle}</p>}
    </header>
  );
}
```

Icons are imported individually from `lucide-react`; there is no `Avatar`/`Card`/`Badge` primitive
library — those visuals are composed directly with `div`s and the page's own CSS.

## 17.5 State Management

There is **no Zustand store** (and no global client-state library). Server data is owned by
**TanStack Query** (`@tanstack/react-query`); the only other shared state lives in the two React
Context providers in the app — `RoleProvider` (the authenticated key's role, read through the
`useRole` hook) and `ToastProvider` (transient notifications). Theme mode is deliberately _not_ a
context: `useTheme` is a plain hook that persists to `localStorage` and writes one attribute on
`<html>` (see §17.7).

### API client — raw payloads, no `{ data }` envelope

The client lives in `src/services/api.ts`. A single `request<T>()` helper attaches the `X-API-Key`
header from `sessionStorage`, then returns **the parsed JSON body as-is** — the backend sends the
raw handler payload, so `request<Session[]>('/sessions')` resolves to a bare `Session[]`, not
`{ data: Session[] }`. (A `204 No Content` resolves to `undefined`; a `401` clears the stored key
and redirects to login.) Endpoints are grouped into typed namespaces — `sessionApi`, `webhookApi`,
`templateApi`, `apiKeyApi`, `auditApi`, `messageApi`, `infraApi`, `pluginsApi`, `statsApi`, ...

```typescript
// src/services/api.ts (abridged)
export const API_BASE_URL = `${(import.meta.env.VITE_API_URL ?? '').replace(/\/+$/, '')}/api`;

async function request<T>(endpoint: string, options: RequestInit = {}): Promise<T> {
  const apiKey = sessionStorage.getItem('openwa_api_key');
  const response = await fetch(`${API_BASE_URL}${endpoint}`, {
    ...options,
    headers: {
      'Content-Type': 'application/json',
      ...(apiKey ? { 'X-API-Key': apiKey } : {}),
      ...options.headers,
    },
  });
  if (!response.ok) {
    const error = await response.json().catch(() => ({}));
    throw new Error(error.message || `HTTP ${response.status}`);
  }
  if (response.status === 204) return undefined as T;
  return response.json(); // ← the raw payload, no unwrapping
}

export const sessionApi = {
  list: () => request<Session[]>('/sessions'), // bare array
  get: (id: string) => request<Session>(`/sessions/${id}`),
  create: (name: string) => request<Session>('/sessions', { method: 'POST', body: JSON.stringify({ name }) }),
  delete: (id: string) => request<void>(`/sessions/${id}`, { method: 'DELETE' }),
  // QR returns a raw { qrCode, status } object — not { qr, expiresAt }, and there is no expiry timer.
  getQR: (id: string) => request<{ qrCode: string; status: string }>(`/sessions/${id}/qr`),
};
```

### TanStack Query hooks

Hooks wrap those namespaces in `src/hooks/queries.ts` — each returns the raw payload directly (no
`.data.data`). Cache invalidation, not a store, keeps the UI in sync after a mutation.

```typescript
// src/hooks/queries.ts (abridged)
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import { sessionApi, webhookApi } from '../services/api';

export const queryKeys = {
  sessions: ['sessions'] as const,
  webhooks: ['webhooks'] as const,
  // ...
};

export function useSessionsQuery() {
  return useQuery({
    queryKey: queryKeys.sessions,
    queryFn: sessionApi.list, // resolves to Session[] directly
    staleTime: 30_000,
  });
}

export function useStopSessionMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: string) => sessionApi.stop(id),
    onSuccess: () => void queryClient.invalidateQueries({ queryKey: queryKeys.sessions }),
  });
}
```

> **There is no `useSessionQr` polling hook.** QR codes are not fetched on a 30 s
> `refetchInterval`. The Sessions page fetches the current QR imperatively via `sessionApi.getQR()`
> and then receives fresh codes pushed over the WebSocket (`session.qr` events, see §17.6).

## 17.6 WebSocket Integration

Real-time updates use **socket.io** (`socket.io-client`), not a raw browser `WebSocket`. The hook is
`src/hooks/useWebSocket.ts`. Key facts:

- **Namespace `/events`** (not `/ws`). The client connects to
  `${VITE_WS_URL || window.location.origin}/events` — same-origin by default; `VITE_WS_URL` only
  overrides it for split-origin deployments.
- **API key via the socket.io `auth` payload (and an `X-API-Key` header for proxies), deliberately
  _not_ in the query string** — a key in the handshake URL would leak into access logs / `Referer`.
- **Reconnection is socket.io's built-in mechanism** — `reconnectionAttempts: 5`,
  `reconnectionDelay: 1000` — not a hand-rolled `setTimeout(connect, 3000)`. When all attempts are
  exhausted the manager fires `reconnect_failed`; the hook surfaces that as `connectionFailed` so the
  UI can offer a manual `reconnect()`.
- **Server → client envelope.** Every push arrives as a single `message` event whose payload is
  `{ type: 'event', timestamp, payload: { event, sessionId, data } }`. The hook registers one
  handler, switches on `payload.event`, and fans out to typed callbacks.
- **Subscriptions** are sent with `socket.emit('message', { type: 'subscribe' | 'unsubscribe', ... })`.

```typescript
// src/hooks/useWebSocket.ts (abridged)
import { useEffect, useRef, useCallback, useState } from 'react';
import { io, Socket } from 'socket.io-client';

const SOCKET_URL = import.meta.env.VITE_WS_URL || window.location.origin;

interface ServerEventEnvelope {
  type: string; // 'event'
  timestamp: string;
  payload?: { event: string; sessionId: string; data: Record<string, unknown> };
}

export function useWebSocket(events: WebSocketEvents = {}) {
  const socketRef = useRef<Socket | null>(null);
  const [isConnected, setIsConnected] = useState(false);
  const [connectionFailed, setConnectionFailed] = useState(false);

  const connect = useCallback(() => {
    if (socketRef.current?.connected) return;
    const apiKey = sessionStorage.getItem('openwa_api_key');
    if (!apiKey) return;

    socketRef.current = io(`${SOCKET_URL}/events`, {
      reconnection: true,
      reconnectionAttempts: 5,
      reconnectionDelay: 1000,
      auth: { apiKey }, // key in the handshake auth, NOT the URL
      extraHeaders: { 'X-API-Key': apiKey }, // header copy for proxies
    });

    socketRef.current.on('connect', () => {
      setIsConnected(true);
      setConnectionFailed(false);
    });
    socketRef.current.on('disconnect', () => setIsConnected(false));
    socketRef.current.io.on('reconnect_failed', () => setConnectionFailed(true));
  }, []);

  useEffect(() => {
    connect();
    const socket = socketRef.current;
    const handle = (msg: ServerEventEnvelope) => {
      if (!msg || msg.type !== 'event' || !msg.payload) return;
      const { event, sessionId, data } = msg.payload;
      switch (event) {
        case 'session.status':
          events.onSessionStatus?.({ sessionId, status: String(data.status), timestamp: msg.timestamp });
          break;
        case 'session.qr':
          events.onQRCode?.({ sessionId, qrCode: String(data.qrCode), timestamp: msg.timestamp });
          break;
        case 'message.received':
        case 'message.sent':
          events.onMessage?.({ sessionId, message: data, timestamp: msg.timestamp });
          break;
        // ...message.ack, message.reaction, message.revoked
      }
    };
    socket?.on('message', handle);
    return () => {
      socket?.off('message', handle);
    };
  }, [connect, events]);

  return { isConnected, connectionFailed, reconnect, subscribe, unsubscribe };
}
```

## 17.7 Theme Configuration

Theming is **not** shadcn HSL design tokens. It is a plain `useTheme` hook (`src/hooks/useTheme.ts`)
that toggles one attribute on `<html>` and lets the CSS do the rest. The value is persisted to
`localStorage` under `openwa_theme`:

- **Mode** — `light | dark | system`. `system` removes `data-theme` so a `prefers-color-scheme`
  media query in the global CSS takes over; otherwise `data-theme="light|dark"` is set explicitly.

The sidebar footer button toggles light ↔ dark directly (resolving `system` first); there is no
picker popover and no `ThemeProvider` context wrapper — it's a hook consumed directly where needed.
An earlier accent-palette picker (seven palettes via `data-palette`) was removed for
maintainability; the legacy `openwa_palette` storage key and the attribute are cleaned up on load.

```typescript
// src/hooks/useTheme.ts (abridged)
export type Theme = 'light' | 'dark' | 'system';

export function useTheme() {
  const [theme, setTheme] = useState<Theme>(/* localStorage 'openwa_theme' ?? 'system' */);

  useEffect(() => {
    const root = document.documentElement;
    if (theme === 'system') root.removeAttribute('data-theme');
    else root.setAttribute('data-theme', theme);
    localStorage.setItem('openwa_theme', theme);
  }, [theme]);

  return { theme, setTheme /* toggleTheme, resolvedTheme */ };
}
```

The actual colors live in the global CSS as variables keyed off `[data-theme]` —
e.g. `:root { --color-accent: #25d366; } [data-theme='dark'] { --color-accent: #25d366; }` — so
switching mode is a single attribute write with no re-render of the tree.

## 17.8 Build & Deployment

### Vite Configuration

The dev server listens on **2886** and proxies `/api` to the API on `2785`. The WebSocket proxy is
on **`/socket.io`** (socket.io's transport path) with `ws: true` — _not_ `/ws`. There is no `@`
import alias and no custom `manualChunks`/Radix vendor split; code-splitting is handled by the
per-page `React.lazy` imports in `App.tsx`. The build-time version (`__APP_VERSION__`) is injected
via `define` from the **root** `package.json` — the file a release bumps — resolved relative to the
config file rather than `process.cwd()`, because the dashboard is normally built from inside
`dashboard/`, where a cwd-relative read picks up the release-untouched `dashboard/package.json`
instead. `APP_VERSION` in the environment still overrides it.

```typescript
// vite.config.ts
import { readFileSync } from 'node:fs';
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';

// Root package.json, resolved from this file — NOT process.cwd().
const { version: pkgVersion } = JSON.parse(readFileSync(new URL('../package.json', import.meta.url), 'utf-8')) as {
  version: string;
};

export default defineConfig({
  plugins: [react()],
  appType: 'spa', // SPA fallback for client-side routing
  define: {
    __APP_VERSION__: JSON.stringify(process.env.APP_VERSION || pkgVersion),
    __BUILD_TIME__: JSON.stringify(new Date().toISOString()),
  },
  server: {
    port: 2886,
    proxy: {
      '/api': {
        target: 'http://localhost:2785',
        changeOrigin: true,
        secure: false,
      },
      // socket.io transport — NOT '/ws'
      '/socket.io': {
        target: 'http://localhost:2785',
        ws: true,
        changeOrigin: true,
      },
    },
  },
});
```

### Production Build & Serving

The dashboard has **no container of its own**. In production the NestJS API serves the bundled
SPA from the same process and port (default `2785`) via `@nestjs/serve-static`, so there is no
nginx image and no separate dashboard service to deploy.

How it fits together:

- `npm run build:all` builds the API (`dist/`) **and** the dashboard (`dashboard/dist/`). The root
  `Dockerfile` does this in its builder stage and copies `dashboard/dist` into the runtime image.
- `ServeStaticModule` is registered conditionally in `src/app.module.ts`: it only activates when
  `dashboard/dist/index.html` exists, serves it with SPA fallback, and `exclude`s `/api` and
  `/socket.io` so those keep returning real API/WebSocket responses. Opt out with
  `SERVE_DASHBOARD=false`.
- Run it directly with `npm run prod` (build + serve) or `node dist/main` against a prebuilt image.

In development the build is absent, so serve-static stays inert and the Vite dev server (port
`2886`, see above) handles the UI with HMR while proxying `/api` + `/socket.io` to the API.

**Split-origin hosting is still supported.** Same-origin serving is the default, not a lock-in: to
host the dashboard separately (a CDN, an object store, or its own container), build it with the API
origin baked in and deploy `dashboard/dist` wherever you like:

```bash
VITE_API_URL=https://api.example.com npm run build   # in dashboard/
```

`dashboard/src/services/api.ts` reads `VITE_API_URL` and calls that origin instead of same-origin
`/api`. Set `SERVE_DASHBOARD=false` on the API so it stops serving its own copy. Remember to add the
dashboard's origin to `CORS_ORIGINS` on the API.

For TLS or public exposure of the default single-port setup, terminate at your own reverse proxy
(nginx, Caddy, a cloud load balancer, or a k8s Ingress) in front of the API; see
`docs/12-troubleshooting-faq.md` for an nginx example.

---

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