chore: groundwork for activity page

docs/design/README.md

@@ -33,6 +33,7 @@ The visual spec of record for the back-office SPA and the transactional emails,
 | [Media picker](screens/media-picker.md) | `/article/:id/edit` (dialog) | 13 | `source/RenewCMS Screens Back-office.dc.html` |
 | [Integration](screens/integration.md) | `/integration` | 8 | `source/RenewCMS Screens Back-office.dc.html` |
 | [API keys](screens/integration-api-keys.md) | `/integration/api-keys` | 12 | `source/RenewCMS Screens API keys.dc.html` |
+| [Activity](screens/activity.md) | `/activity` | 9 (plus 6 details, 3 My activity) | `source/RenewCMS Screens Activity.dc.html` |
 | [Users](screens/users.md) | `/users` | 17 | `source/RenewCMS Screens Back-office.dc.html` |
 | [Settings](screens/settings.md) | `/settings` | 25 | `source/RenewCMS Screens Back-office.dc.html`, `source/RenewCMS Screens Media cleanup.dc.html` |
 | [Profile](screens/profile.md) | `/profile` | 13 | `source/RenewCMS Screens Back-office.dc.html` |
@@ -41,6 +42,7 @@ The visual spec of record for the back-office SPA and the transactional emails,
 
 ## Other boards
 
+- `source/ActivityFrame.dc.html`: the frame that draws every Activity state, the Home card and the Settings retention card (the Activity board imports it). Its copy, component and API tables are in `source/activity-spec.js`. It holds the exact values. Home and Settings are drawn around dashed placeholders.
 - `source/MediaFrame.dc.html`: the frame that draws the Media and Media picker states (the Back-office board imports it). Like `AppFrame.dc.html`, it holds the exact values.
 - `source/SettingsFrame.dc.html`: the Media cleanup card and its purge dialog (the Media cleanup board imports it, with `MediaFrame.dc.html` for the Duplicates toolbar button). They hold the exact values.
 - `source/IntegrationPage.dc.html` and `source/ApiKeysPage.dc.html`: the page components for the Integration and API keys screens (imported by `AppFrame.dc.html`). They hold the exact values.