added pause and resume alarm diagnosis review campaign service

csharp/App/Backend/Controller.cs

@@ -1275,7 +1275,21 @@ public class Controller : ControllerBase
     public ActionResult StopAlarmReviewCampaign()
     {
         AlarmReviewService.StopCampaign();
-        return Ok(new { message = "Campaign stopped and progress file deleted. Safe to redeploy." });
+        return Ok(new { message = "Campaign paused — progress preserved. Use ResumeAlarmReviewCampaign to restart timers." });
+    }
+
+    [HttpPost(nameof(ResumeAlarmReviewCampaign))]
+    public ActionResult ResumeAlarmReviewCampaign()
+    {
+        AlarmReviewService.ResumeCampaign();
+        return Ok(new { message = "Campaign resumed — timers restarted from existing progress." });
+    }
+
+    [HttpPost(nameof(ResetAlarmReviewCampaign))]
+    public ActionResult ResetAlarmReviewCampaign()
+    {
+        AlarmReviewService.ResetCampaign();
+        return Ok(new { message = "Campaign fully reset — all progress deleted. Use StartAlarmReviewCampaign to begin again." });
     }
 
     [HttpGet(nameof(CorrectAlarm))]

csharp/App/Backend/Services/AlarmReviewService.cs

@@ -206,8 +206,33 @@ public static class AlarmReviewService
         Console.WriteLine("[AlarmReviewService] Daily scheduler started (8AM + 2PM jobs).");
     }
 
-    /// <summary>Stops the scheduler and deletes the progress file. Safe to call at any time.</summary>
+    /// <summary>Pauses the scheduler (timers stopped) but keeps all progress. Resume with ResumeCampaign().</summary>
     public static void StopCampaign()
+    {
+        _morningTimer?.Dispose();
+        _afternoonTimer?.Dispose();
+        _morningTimer   = null;
+        _afternoonTimer = null;
+        _testBatch      = null;
+        Console.WriteLine("[AlarmReviewService] Campaign paused — progress preserved. Call ResumeCampaign() to restart timers.");
+    }
+
+    /// <summary>Resumes timers without touching progress. Use after StopCampaign() or server restart.</summary>
+    public static void ResumeCampaign()
+    {
+        if (!File.Exists(ProgressFile))
+        {
+            Console.WriteLine("[AlarmReviewService] No progress file found — use StartCampaign() to begin.");
+            return;
+        }
+        LoadGermanNames();
+        ScheduleTimer(ref _morningTimer,   8,  0, () => RunMorningJobAsync()  .GetAwaiter().GetResult());
+        ScheduleTimer(ref _afternoonTimer, 14, 0, () => RunAfternoonJobAsync().GetAwaiter().GetResult());
+        Console.WriteLine("[AlarmReviewService] Campaign resumed — timers restarted.");
+    }
+
+    /// <summary>Deletes all progress and stops timers. Only use to start over from scratch.</summary>
+    public static void ResetCampaign()
     {
         _morningTimer?.Dispose();
         _afternoonTimer?.Dispose();
@@ -217,8 +242,10 @@ public static class AlarmReviewService
 
         if (File.Exists(ProgressFile))
             File.Delete(ProgressFile);
+        if (File.Exists(CheckedFilePath))
+            File.Delete(CheckedFilePath);
 
-        Console.WriteLine("[AlarmReviewService] Campaign stopped and progress file deleted.");
+        Console.WriteLine("[AlarmReviewService] Campaign fully reset — all progress deleted.");
     }
 
     private static void ScheduleTimer(ref Timer? timer, int hour, int minute, Action action)
@@ -265,6 +292,15 @@ public static class AlarmReviewService
         {
             var submissionCount = current.Submissions.Values.Count(s => s != null);
 
+            // If the batch was sent today, don't treat 0 submissions as a stall —
+            // reviewers haven't had a full day yet. Skip and wait for tomorrow's job.
+            var sentToday = current.SentDate == DateTime.Now.ToString("yyyy-MM-dd");
+            if (submissionCount == 0 && sentToday)
+            {
+                Console.WriteLine($"[AlarmReviewService] Batch {current.BatchNumber}: sent today, 0 submissions so far — waiting for tomorrow.");
+                return;
+            }
+
             if (submissionCount == 0)
             {
                 const int MaxResends = 3;
@@ -1457,6 +1493,46 @@ render();
             var html = BuildReviewerEmailHtml(name, reviewUrl, batch.BatchNumber, batch.AlarmKeys.Count, quote, isResend);
             await SendEmailAsync(email, subject, html);
         }
+
+        // Notify admin with a preview of what reviewers received
+        await SendAdminBatchDispatchNoticeAsync(batch, isResend);
+    }
+
+    private static async Task SendAdminBatchDispatchNoticeAsync(BatchRecord batch, bool isResend)
+    {
+        var totalBatches = (int)Math.Ceiling((double)AllAlarmKeys.Length / BatchSize);
+        var action       = isResend ? "erneut gesendet" : "gesendet";
+        var subject      = $"[Admin] Stapel {batch.BatchNumber}/{totalBatches} {action} an {Reviewers.Length} Prüfer";
+
+        var previewUrl   = $"{BaseUrl}/ReviewAlarms?batch={batch.BatchNumber}&reviewer={Uri.EscapeDataString(Reviewers[0].Name)}";
+        var reviewerList = string.Join(", ", Reviewers.Select(r => r.Name));
+
+        var alarmRows = string.Join("\n", batch.AlarmKeys.Select((key, i) =>
+            $"""<tr><td style="padding:4px 12px;border-bottom:1px solid #f5f5f5;font-size:12px;color:#555">{i + 1}. {SplitCamelCase(key)} <span style="color:#aaa;font-size:11px">({(SinexcelKeySet.Contains(key) ? "Sinexcel" : "Growatt")})</span></td></tr>"""));
+
+        var html = $"""
+            <!DOCTYPE html><html><head><meta charset="utf-8"></head>
+            <body style="font-family:Arial,Helvetica,sans-serif;font-size:14px;color:#333;padding:24px;max-width:650px">
+            <h2 style="color:#2c3e50;margin-bottom:4px">Stapel {batch.BatchNumber} {action}</h2>
+            <p style="color:#888;font-size:12px;margin-bottom:20px">{DateTime.Now:yyyy-MM-dd HH:mm} · {batch.AlarmKeys.Count} Alarme · Deadline: 8:00 Uhr morgen früh</p>
+
+            <p style="margin-bottom:16px">Gesendet an: <strong>{reviewerList}</strong></p>
+
+            <p style="margin-bottom:20px">
+              <a href="{previewUrl}" style="background:#3498db;color:#fff;text-decoration:none;padding:9px 22px;border-radius:6px;font-size:13px;display:inline-block">Formular ansehen →</a>
+              <span style="font-size:12px;color:#888;margin-left:10px">(alle Prüfer sehen denselben Inhalt)</span>
+            </p>
+
+            <h3 style="color:#2c3e50;margin-bottom:8px">Alarme in diesem Stapel</h3>
+            <table style="border-collapse:collapse;width:100%;margin-bottom:24px">
+              {alarmRows}
+            </table>
+
+            <p style="font-size:11px;color:#bbb">Diese E-Mail dient nur zur Information — keine Aktion erforderlich.</p>
+            </body></html>
+            """;
+
+        await SendEmailAsync(AdminEmail, subject, html);
     }
 
     private static async Task SendReminderEmailAsync(BatchRecord batch, string name, string email)