Manage the Slack digest in the admin

New settings area: the webhook lives in the database and is only shown
shortened afterwards, the environment variable stays as a fallback. A switch
decides whether internal entries travel, a button sends the digest right
away, and every run is recorded with period, count, projects, result and
who triggered it.

messages/en.json

@@ -273,7 +273,8 @@
 			"clients": "Access",
 			"manage": "Manage",
 			"postTypes": "Post types",
-			"api": "API"
+			"api": "API",
+			"settings": "Settings"
 		},
 		"messages": {
 			"created": "Created.",
@@ -283,7 +284,12 @@
 			"invalid": "Please check the marked fields.",
 			"slugTaken": "That slug already exists. Pick another one.",
 			"selfAdmin": "You cannot change the administration right on your own account. Another administration account has to do it.",
-			"typeInUse": "This type is still in use. Clear the active checkbox instead."
+			"typeInUse": "This type is still in use. Clear the active checkbox instead.",
+			"slackSaved": "The Slack settings are saved.",
+			"reportSent": "The digest is out.",
+			"reportEmpty": "Nothing was published in the last seven days, so no message went out.",
+			"reportNoWebhook": "No webhook is stored.",
+			"reportRejected": "Slack rejected the message."
 		},
 		"errors": {
 			"nameRequired": "Enter a name.",
@@ -696,7 +702,51 @@
 			"publishHint": "No access may publish. That stays bound to accounts."
 		},
 		"recentEntries": "Recently edited",
-		"allEntries": "All entries"
+		"allEntries": "All entries",
+		"settings": {
+			"eyebrow": "Administration",
+			"title": "Settings",
+			"intro": "The Slack digest and what it contains. The schedule lives in Coolify, not here.",
+			"slack": "Slack",
+			"save": "Save",
+			"saving": "Saving",
+			"sendNow": "Send the digest now",
+			"sending": "Sending",
+			"webhookStored": "Stored, no longer shown.",
+			"webhookFromEnv": "Comes from the SLACK_WEBHOOK_URL variable.",
+			"replaceWebhook": "Enter a different webhook",
+			"schedule": "Schedule",
+			"scheduleText": "The run starts Mondays at 08:00 as a Coolify task. It publishes due entries first, then sends the digest. Nothing published means no message.",
+			"history": "History",
+			"historyMeta": "{count, plural, =0 {no run} one {# run} other {# runs}}",
+			"historyEmpty": "No run recorded yet.",
+			"columns": {
+				"when": "When",
+				"period": "Period",
+				"total": "Entries",
+				"projects": "Projects",
+				"result": "Result",
+				"trigger": "Triggered by"
+			},
+			"results": {
+				"sent": "Sent",
+				"nothing_published": "Nothing published",
+				"not_configured": "No webhook",
+				"rejected": "Rejected by Slack"
+			},
+			"fields": {
+				"webhook": "Incoming webhook",
+				"includeInternal": "Include internal entries"
+			},
+			"hints": {
+				"webhook": "From Slack under Incoming Webhooks. The address is bound to one channel.",
+				"includeInternal": "Slack is internal, so this is on by default. Off means customer and public entries only.",
+				"sendNow": "Sends the last seven days into the channel right away."
+			},
+			"errors": {
+				"webhookInvalid": "That does not look like a Slack webhook address."
+			}
+		}
 	},
 	"filter": {
 		"type": "Type",