store, mavweb: the delivery outbox can be read (V-390)

The table was write-only. Rows were recorded and nothing could show them, so
the tests for #368 and #370 had to reach past the store into store.DB — if a
test can only see it that way, so can nobody else. A durable record nobody
reads answers no question, and why Maven went quiet is supposed to be a query.

ListDeliveryAttempts returns recent rows newest first, filtered by status.
Status is the filter worth having because the two real questions are "what got
dropped" and "what is still pending", and neither is answerable by reading the
whole list on a busy day. It reaches mavweb over IPC as DeliveryAttempts.

The section goes on /notifications, which already answers "what did she send",
rather than on a page of its own. Shared ui.css, the nav partial, the table in
div.scroll. A failed outbox read leaves a log line and still renders the nudge
list, because half the page beats none of it.

cmd/mavweb/handlers_test.go

@@ -54,7 +54,9 @@ type fakeCore struct {
 	revertErr   error
 
 	// for handleNotifications tests
-	nudgesErr error
+	nudgesErr     error
+	attempts      []ipc.DeliveryAttempt
+	attemptStatus string
 
 	// for handleHistory tests
 	historyFacts []ipc.Fact
@@ -1251,3 +1253,35 @@ func TestHandleWS_AssertedSession_PassesGate(t *testing.T) {
 		t.Fatalf("status = 403 on an asserted session; body=%s", rr.Body.String())
 	}
 }
+
+func (f *fakeCore) DeliveryAttempts(_ context.Context, status string, _ int) ([]ipc.DeliveryAttempt, error) {
+	f.attemptStatus = status
+	return f.attempts, nil
+}
+
+// TestHandleNotifications_ShowsTheOutbox — the outbox was written and never
+// read, so a dropped or failed send was invisible (Vikunja #390).
+func TestHandleNotifications_ShowsTheOutbox(t *testing.T) {
+	done := time.Date(2026, 8, 4, 9, 0, 30, 0, time.UTC)
+	core := &fakeCore{
+		attempts: []ipc.DeliveryAttempt{
+			{Kind: "nudge", Rule: "care-check", Channel: "telegram", Status: "dropped",
+				Created: done.Add(-30 * time.Second), Completed: &done},
+			{Kind: "reminder", ReminderID: 7, Channel: "voice", Status: "pending", Created: done},
+		},
+	}
+	rr := httptest.NewRecorder()
+	handleNotifications(rr, httptest.NewRequest(http.MethodGet, "/notifications?status=dropped", nil), core)
+	if rr.Code != http.StatusOK {
+		t.Fatalf("status = %d, want 200; body=%s", rr.Code, rr.Body.String())
+	}
+	if core.attemptStatus != "dropped" {
+		t.Errorf("status filter = %q, want it passed through", core.attemptStatus)
+	}
+	body := rr.Body.String()
+	for _, want := range []string{"care-check", "dropped", "reminder #7", "Delivery outbox"} {
+		if !strings.Contains(body, want) {
+			t.Errorf("rendered outbox missing %q", want)
+		}
+	}
+}

cmd/mavweb/main.go

@@ -893,12 +893,59 @@ func handleNotifications(w http.ResponseWriter, r *http.Request, core ipc.CoreAP
 		http.Error(w, "notifications error: "+err.Error(), http.StatusBadGateway)
 		return
 	}
+	// The outbox, on the page that already answers "what did she send".
+	// A failed or dropped attempt is why she went quiet, and until now it was
+	// recorded and unreadable (Vikunja #390). Filter with ?status=dropped.
+	status := r.URL.Query().Get("status")
+	attempts, err := core.DeliveryAttempts(ctx, status, 50)
+	if err != nil {
+		// The nudge list is still worth showing, so this is a note on the page
+		// rather than a dead page.
+		log.Printf("notifications: delivery attempts: %v", err)
+	}
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	if err := notificationsTmpl.Execute(w, map[string]any{"Nudges": nudges}); err != nil {
+	if err := notificationsTmpl.Execute(w, map[string]any{
+		"Nudges":   nudges,
+		"Attempts": deliveryRows(attempts),
+		"Status":   status,
+	}); err != nil {
 		log.Printf("notifications template: %v", err)
 	}
 }
 
+// deliveryRow is one outbox line, with every timestamp already formatted so
+// the template holds no date logic — same shape as taskRow.
+type deliveryRow struct {
+	Kind      string
+	Target    string
+	Channel   string
+	Status    string
+	Created   string
+	Completed string
+}
+
+func deliveryRows(as []ipc.DeliveryAttempt) []deliveryRow {
+	out := make([]deliveryRow, 0, len(as))
+	for _, a := range as {
+		target := a.Rule
+		if target == "" && a.ReminderID != 0 {
+			target = "reminder #" + strconv.FormatInt(a.ReminderID, 10)
+		}
+		row := deliveryRow{
+			Kind:    a.Kind,
+			Target:  target,
+			Channel: a.Channel,
+			Status:  a.Status,
+			Created: a.Created.Format("02.01 15:04"),
+		}
+		if a.Completed != nil {
+			row.Completed = a.Completed.Format("15:04")
+		}
+		out = append(out, row)
+	}
+	return out
+}
+
 func handleReminders(w http.ResponseWriter, r *http.Request, core ipc.CoreAPI) {
 	if core == nil {
 		http.Error(w, "reminders disabled (no -core)", http.StatusServiceUnavailable)

cmd/mavweb/notifications.html

@@ -14,5 +14,27 @@
   <div>no notifications yet</div>
   <div class=hint>check back later or ask maven a question</div>
 </div>{{end}}
+<h2>Delivery outbox</h2>
+<p class=hint>
+  every send is recorded before it leaves, so a failure is visible rather than silent.
+  <a href="/notifications">all</a> ·
+  <a href="/notifications?status=dropped">dropped</a> ·
+  <a href="/notifications?status=failed">failed</a> ·
+  <a href="/notifications?status=pending">pending</a> ·
+  <a href="/notifications?status=unknown">unknown</a>
+</p>
+{{if .Attempts}}<div class=scroll><table>
+<tr><th>started</th><th>kind</th><th>rule</th><th>channel</th><th>status</th><th>finished</th></tr>
+{{range .Attempts}}<tr>
+<td class=hint>{{.Created}}</td>
+<td>{{.Kind}}</td>
+<td class=key>{{.Target}}</td>
+<td><span class=badge>{{.Channel}}</span></td>
+<td class={{.Status}}>{{.Status}}</td>
+<td class=hint>{{.Completed}}</td>
+</tr>{{end}}</table></div>
+{{else}}<div class=empty>
+  <div>no delivery attempts{{if .Status}} with status {{.Status}}{{end}}</div>
+</div>{{end}}
 {{template "shellBottom"}}
 </html>