[CLD-9186] Remove onboarding tasklist, add preview banner (#31203)

* Remove pricing modal. Adjust everywhere to instead open mattermost.com/pricing. When air gapped, don't show buttons to view plans.

* Fix lint

* Further clean up of unused code. Fixes for linter

* Remove onboarding tasklist for previews, add Cloud previer banner

* Fixes for linter, i18n

* Revert dev lines

* Fix lint

* When below one minute, switch to seconds

* fix linter

* fixes for PR feedback

* useExternalLink for opening pricing modal with enriched params

* Fix i17n

* Fix style, tests

* Update webapp/channels/src/components/announcement_bar/cloud_preview_announcement_bar/index.tsx

Co-authored-by: Guillermo Vayá <guillermo.vaya@mattermost.com>

* Fix linter

---------

Co-authored-by: Guillermo Vayá <guillermo.vaya@mattermost.com>

server/channels/api4/cloud.go

@@ -62,7 +62,34 @@ func ensureCloudInterface(c *Context, where string) bool {
 	return true
 }
 
+func getPreviewSubscription(c *Context, w http.ResponseWriter, r *http.Request) {
+	license := c.App.Channels().License()
+	subscription := &model.Subscription{
+		ID:             "cloud-preview",
+		ProductID:      license.SkuName,
+		StartAt:        license.StartsAt,
+		TrialEndAt:     license.ExpiresAt,
+		EndAt:          license.ExpiresAt,
+		IsFreeTrial:    "true",
+		IsCloudPreview: true,
+	}
+
+	json, err := json.Marshal(subscription)
+	if err != nil {
+		c.Err = model.NewAppError("Api4.getSubscription", "api.cloud.request_error", nil, "", http.StatusInternalServerError).Wrap(err)
+		return
+	}
+
+	w.Write(json)
+}
+
 func getSubscription(c *Context, w http.ResponseWriter, r *http.Request) {
+	// Preview subscription is a special case for cloud preview licenses.
+	if c.App.Channels().License().IsCloudPreview() {
+		getPreviewSubscription(c, w, r)
+		return
+	}
+
 	ensured := ensureCloudInterface(c, "Api4.getSubscription")
 	if !ensured {
 		return

server/public/model/cloud.go

@@ -191,6 +191,7 @@ type Subscription struct {
 	CancelAt                *int64   `json:"cancel_at"`
 	WillRenew               string   `json:"will_renew"`
 	SimulatedCurrentTimeMs  *int64   `json:"simulated_current_time_ms"`
+	IsCloudPreview          bool     `json:"is_cloud_preview"`
 }
 
 func (s *Subscription) DaysToExpiration() int64 {

server/public/model/license.go

@@ -350,6 +350,11 @@ func (l *License) IsStarted() bool {
 	return l.StartsAt < GetMillis()
 }
 
+// Cloud preview is a cloud license, that is also a trial, and the difference between the start and end date is exactly 1 hour.
+func (l *License) IsCloudPreview() bool {
+	return l.IsCloud() && l.IsTrialLicense() && l.ExpiresAt-l.StartsAt == 1*time.Hour.Milliseconds()
+}
+
 func (l *License) IsCloud() bool {
 	return l != nil && l.Features != nil && l.Features.Cloud != nil && *l.Features.Cloud
 }