feat(device): replace daily wakeHour with multi-time wakeTimes (minutes)

Frame settings now offer two update-frequency modes: "at specific times" or
"every X minutes". Times are stored as an int[] of minutes-since-midnight,
allowing multiple slots per day at minute granularity. Backend computes the
earliest upcoming slot for X-Interval-Ms and uses the most-recent-past slot
as the rotation-due boundary. PWA settings sheet has hour/minute/AM-PM
dropdowns with + Add / trash, a live "next update" preview, and a note
that changes only take effect at the device's next sync.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/Controller/DeviceImageController.php

@@ -28,14 +28,21 @@ class DeviceImageController extends AbstractController
 
     private function computeIntervalMs(Device $device): int
     {
-        if ($device->getWakeHour() !== null) {
+        $wakeTimes = $device->getWakeTimes();
+        if (!empty($wakeTimes)) {
             $tz  = new \DateTimeZone($device->getTimezone());
             $now = new \DateTimeImmutable('now', $tz);
-            $next = $now->setTime($device->getWakeHour(), 0, 0);
-            if ($next->getTimestamp() <= $now->getTimestamp()) {
-                $next = $next->modify('+1 day');
+            $earliest = null;
+            foreach ($wakeTimes as $minutes) {
+                $candidate = $now->setTime((int) ($minutes / 60), $minutes % 60, 0);
+                if ($candidate->getTimestamp() <= $now->getTimestamp()) {
+                    $candidate = $candidate->modify('+1 day');
+                }
+                if ($earliest === null || $candidate < $earliest) {
+                    $earliest = $candidate;
+                }
             }
-            return (int) (($next->getTimestamp() - $now->getTimestamp()) * 1000);
+            return (int) (($earliest->getTimestamp() - $now->getTimestamp()) * 1000);
         }
 
         return $device->getRotationIntervalMinutes() * 60 * 1000;