feat: Add allowAliasDeletion field to admin settings

public/locales/en-US/translation.json

@@ -383,6 +383,10 @@
                     "allowStatistics": {
                         "label": "Allow statistics",
                         "description": "If enabled, your instance will collect anonymous statistics and share them. They will only be stored locally on this instance but made public."
+                    },
+                    "allowAliasDeletion": {
+                        "label": "Allow alias deletion",
+                        "description": "If enabled, users will be able to delete their aliases."
                     }
                 }
             },

src/constants/admin-settings.ts

@@ -11,4 +11,5 @@ export const DEFAULT_ADMIN_SETTINGS: AdminSettings = {
 	imageProxyStorageLifeTimeInHours: 24,
 	enableImageProxy: true,
 	allowStatistics: true,
+	allowAliasDeletion: false,
 }

src/route-widgets/GlobalSettingsRoute/SettingsForm.tsx

@@ -488,6 +488,35 @@ export default function SettingsForm({settings, queryKey}: SettingsFormProps) {
 								</FormHelperText>
 							</FormGroup>
 						</Grid>
+						<Grid item>
+							<FormGroup key="allow_alias_deletion">
+								<FormControlLabel
+									control={
+										<Checkbox
+											checked={formik.values.allowAliasDeletion!}
+											onChange={formik.handleChange}
+											name="allowAliasDeletion"
+										/>
+									}
+									disabled={formik.isSubmitting}
+									label={t(
+										"routes.AdminRoute.forms.settings.allowAliasDeletion.label",
+									)}
+								/>
+								<FormHelperText
+									error={
+										formik.touched.allowAliasDeletion &&
+										Boolean(formik.errors.allowAliasDeletion)
+									}
+								>
+									{(formik.touched.allowAliasDeletion &&
+										formik.errors.allowAliasDeletion) ||
+										t(
+											"routes.AdminRoute.forms.settings.allowAliasDeletion.description",
+										)}
+								</FormHelperText>
+							</FormGroup>
+						</Grid>
 					</Grid>
 				</Grid>
 				<Grid item>

src/server-types.ts

@@ -210,4 +210,5 @@ export interface AdminSettings {
 	userEmailEnableDisposableEmails: boolean
 	userEmailEnableOtherRelays: boolean | null
 	allowStatistics: boolean | null
+	allowAliasDeletion: boolean | null
 }