fix: Slack notification delivery now resolves a real channel (connection config, then the org's configured Slack automation channel) instead of an always-empty connect-time field that silently dropped every message; docs and UI corrected to match

docs/content/docs/guides/notifications.mdx

@@ -78,7 +78,7 @@ The settings page controls where enabled notifications are delivered. The channe
 
 - **In-app**: the bell in the dashboard. Always on, controlled by the per-category toggles above.
 - **Email**: delivery to your account email. Turn it on to also receive each enabled notification as an email with a link back into the app.
-- **Slack**: posts each enabled notification to your workspace's connected Slack, on the channel you chose when connecting. Connect Slack from the [Integrations](/guides/integrations) tab first; until then the toggle saves but nothing is delivered.
+- **Slack**: posts each enabled notification to your connected Slack, on the channel you have configured for Slack in the [Integrations](/guides/integrations) tab. Connect Slack and set up a channel there first; until a Slack channel is configured the toggle saves but nothing is delivered.
 
 For richer, event-specific routing (custom messages, branching, multiple destinations), use [Automations](/guides/automations) instead: they can route events like replies, bookings, and record changes to outside tools with full control.
 

internal/app/integration/service.go

@@ -1110,6 +1110,31 @@ func buildDisplayFields(provider models.IntegrationProvider, config map[string]a
 	return df
 }
 
+// slackChannelFor resolves the channel to post org notifications to. The
+// OAuth connect flow doesn't capture a default channel, so we look (in order)
+// at the connection's own config, then reuse whatever channel the org already
+// configured for a Slack automation/event subscription. Empty when none.
+func (s *service) slackChannelFor(ctx context.Context, orgID uuid.UUID, c models.IntegrationConnection) string {
+	if ch := configString(c.DisplayFields, "channel"); ch != "" {
+		return ch
+	}
+	if ch := configString(c.ConfigCapabilities, "channel"); ch != "" {
+		return ch
+	}
+	subs, err := s.repo.ListEventSubscriptions(ctx, orgID, c.ID)
+	if err != nil {
+		return ""
+	}
+	for _, sub := range subs {
+		if sub.Action == models.IntegrationActionSlackNotify {
+			if ch := configString(sub.Config, "channel"); ch != "" {
+				return ch
+			}
+		}
+	}
+	return ""
+}
+
 // NotifySlack posts a one-off message to the org's connected Slack workspace,
 // on the default channel chosen at connect time. Used by the notification
 // system's Slack delivery channel (distinct from event-subscription actions).
@@ -1123,7 +1148,7 @@ func (s *service) NotifySlack(ctx context.Context, orgID uuid.UUID, title, body
 		if c.Provider != models.IntegrationSlack || c.Status != models.IntegrationStatusConnected {
 			continue
 		}
-		channel := configString(c.DisplayFields, "channel")
+		channel := s.slackChannelFor(ctx, orgID, c)
 		if channel == "" {
 			continue
 		}

web/src/app/app/settings/notifications/page.tsx

@@ -117,7 +117,7 @@ export default function NotificationsSettingsPage() {
                         <Row label="Email" description="Delivery to your account email.">
                             <Toggle on={channelOn("email")} onChange={(v) => setChannel("email", v)} />
                         </Row>
-                        <Row label="Slack" description="Posts to your workspace's connected Slack. Connect it in the Integrations tab first.">
+                        <Row label="Slack" description="Posts to your connected Slack, on the channel set up for Slack in the Integrations tab. Connect Slack and configure a channel there first.">
                             <Toggle on={channelOn("slack")} onChange={(v) => setChannel("slack", v)} />
                         </Row>
                     </Section>