Event log: show attempt and delivery times, label replays, zone event times (closes #386)

In the event log and on an event's page, attempts and deliveries showed no time, event times had no zone, and a replay looked like the original it repeated. Each attempt now shows when its result was recorded and each delivery when it was created, as how long ago with the full UTC time on hover, and the event log's event times read the same way. A delivery created by Replay records it in a new `replay` column and is labelled a replay in the event's summary line and its delivery list; replays made before this change are not labelled. A delivery's row is now drawn by one template, `delivery_row`, that both pages share.

Model: opus-5-5

internal/handlers/delivery_replay_test.go

@@ -3,6 +3,7 @@ package handlers_test
 import (
 	"net/http"
 	"net/http/httptest"
+	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -528,3 +529,58 @@ func TestHandleSourceLogs_RendersReplayControlAndBanner(t *testing.T) {
 	assert.NotContains(t, unknown, "alert-success")
 	assert.NotContains(t, unknown, "made-up")
 }
+
+// TestHandleDeliveryReplay_LabelsTheReplay proves a delivery created
+// by Replay is labelled as a replay in the event's summary line in the
+// event log, and in the list of the event's deliveries there and on
+// the event's page, while the delivery it repeats is not.
+func TestHandleDeliveryReplay_LabelsTheReplay(t *testing.T) {
+	t.Parallel()
+
+	var (
+		h     *handlers.Handlers
+		sess  *session.Session
+		db    *database.Database
+		dbMgr *database.WebhookDBManager
+	)
+
+	app := newTestApp(t, &h, &sess, &db, &dbMgr)
+	app.RequireStart()
+
+	t.Cleanup(app.RequireStop)
+
+	wh := seedWebhook(t, db)
+	tgt := seedConfiguredTarget(
+		t, db, wh.ID, database.TargetTypeHTTP,
+		`{"url":"`+replayTargetURL+`"}`,
+	)
+
+	event, original := seedFailedDelivery(t, dbMgr, wh.ID, tgt.ID)
+
+	w := postReplay(t, h, sess, wh.ID, original.ID)
+	require.Equal(t, http.StatusSeeOther, w.Code)
+
+	eventLog := renderSourceLogsPage(t, h, sess, wh.ID)
+
+	assert.Contains(t, eventLog, tgt.Name+": failed")
+	assert.Contains(t, eventLog, tgt.Name+" (replay): pending")
+
+	w = serveEventPage(t, h, sess, wh.ID, event.ID)
+	require.Equal(t, http.StatusOK, w.Code)
+
+	// In each delivery list a row names the target, then the label if
+	// it is a replay, then its status: the replay is still pending, the
+	// original failed.
+	replayRow := tgt.Name + `</span> ` +
+		`<span class="text-xs text-gray-500">replay</span> ` +
+		`<span class="text-xs text-gray-400">pending</span>`
+	originalRow := tgt.Name + `</span> ` +
+		`<span class="text-xs text-red-600">failed</span>`
+
+	for _, page := range []string{eventLog, w.Body.String()} {
+		page = strings.Join(strings.Fields(page), " ")
+
+		assert.Contains(t, page, replayRow)
+		assert.Contains(t, page, originalRow)
+	}
+}