feat: remote user, ack/done actions and /me API

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BCrwHHnGCB5XH968Nxokqw

core/app/Delivery/EventActions.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Delivery;
+
+use App\Enums\EventState;
+use App\Models\Event;
+use App\Scheduling\DueResolver;
+use App\Scheduling\QuietRule;
+
+final class EventActions
+{
+    public function __construct(
+        private readonly DueResolver $due,
+        private readonly QuietRule $quiet,
+    ) {}
+
+    /** «Помню»: молчать до следующей контрольной точки текущего состояния. */
+    public function ack(Event $event): void
+    {
+        if ($event->isTerminal()) {
+            return;
+        }
+        $user = $event->user;
+        $now = $user->now();
+        $event->quiet_until = $this->quiet->afterAck($event, $user, $event->state, $this->due->resolve($event, $user), $now);
+        $event->save();
+    }
+
+    /** «Сделано»: закрыть событие целиком. */
+    public function done(Event $event): void
+    {
+        if ($event->isTerminal()) {
+            return;
+        }
+        $event->state = EventState::Done;
+        $event->done_at = now();
+        $event->save();
+    }
+}