Feature: documents trash aka soft delete (#6944)

src-ui/src/app/data/document.ts

@@ -144,6 +144,8 @@ export interface Document extends ObjectWithPermissions {
 
   added?: Date
 
+  deleted_at?: Date
+
   original_file_name?: string
 
   archived_file_name?: string

src-ui/src/app/data/ui-settings.ts

@@ -63,6 +63,7 @@ export const SETTINGS_KEYS = {
     'general-settings:document-editing:remove-inbox-tags',
   SEARCH_DB_ONLY: 'general-settings:search:db-only',
   SEARCH_FULL_TYPE: 'general-settings:search:more-link',
+  EMPTY_TRASH_DELAY: 'general-settings:trash:empty-trash-delay',
 }
 
 export const SETTINGS: UiSetting[] = [
@@ -236,4 +237,9 @@ export const SETTINGS: UiSetting[] = [
     type: 'string',
     default: GlobalSearchType.TITLE_CONTENT,
   },
+  {
+    key: SETTINGS_KEYS.EMPTY_TRASH_DELAY,
+    type: 'number',
+    default: 30,
+  },
 ]