Release 1.1.0: QR-Reportimport, Regal-Auswahlmodal, Einlagern/Auslagern-Verknuepfungen aus Reifenlager, Stabilitaetsfixes

Lagerbestand/Components/Pages/TireCheckin.razor

@@ -5,6 +5,7 @@
 @inject IStorageLocationService StorageLocationService
 @inject ILocationCodeService LocationCodeService
 @inject ITireStackService TireStackService
+@inject ITireReportService TireReportService
 @inject ICatalogService CatalogService
 @inject IFileStorageService FileStorageService
 @inject UserSessionService UserSession
@@ -474,6 +475,42 @@ else
                 </div>
             }
 
+            @if (!isInventoryMode)
+            {
+                @* QR report scan *@
+                <div class="report-scan-bar">
+                    @if (pendingReport == null)
+                    {
+                        <div class="report-scan-text">
+                            <span class="report-scan-icon" aria-hidden="true">📷</span>
+                            <span>Profiltiefen-Report (Launch TTS01) per QR-Code übernehmen</span>
+                        </div>
+                        <button type="button" class="btn btn-outline" @onclick="OpenQrScanner" disabled="@isLoadingReport">
+                            @if (isLoadingReport)
+                            {
+                                <span class="spinner"></span>
+                                <span>Report wird geladen…</span>
+                            }
+                            else
+                            {
+                                <span>QR-Code scannen</span>
+                            }
+                        </button>
+                    }
+                    else
+                    {
+                        <div class="report-attached">
+                            <div class="report-attached-head">
+                                <span class="report-scan-icon" aria-hidden="true">📋</span>
+                                <strong>Report wird mit dem neuen Stapel gespeichert</strong>
+                                <button type="button" class="btn-link" @onclick="RemovePendingReport">Entfernen</button>
+                            </div>
+                            @ReportSummaryFragment(pendingReport)
+                        </div>
+                    }
+                </div>
+            }
+
             @* Tire/Felgen Form *@
             <div class="tire-form">
                 @if (!isFelgenCategory)
@@ -506,6 +543,10 @@ else
                     else
                     {
                         <TireSizeInput Value="@tireStack.TireSize" ValueChanged="OnTireSizeChanged" />
+                        @if (tireSizeFromVehicle && !string.IsNullOrEmpty(tireStack.TireSize))
+                        {
+                            <span class="field-hint">🚗 Vom Fahrzeug übernommen</span>
+                        }
                     }
                 </div>
 
@@ -657,7 +698,7 @@ else
     @* Step 3: Storage Location *@
     @if (currentStep == 3)
     {
-        <div class="checkin-card">
+        <div class="checkin-card wide">
             <div class="selected-info-bar">
                 @if (isInventoryMode)
                 {
@@ -676,32 +717,104 @@ else
 
             <h2>Lagerplatz auswählen</h2>
 
-            <div class="location-selector">
-                @* Area Filter *@
-                <div class="area-filter">
-                    <button class="filter-btn @(selectedAreaFilter == null ? "active" : "")" 
-                            @onclick="() => FilterLocationsByArea(null)">
-                        Alle
-                    </button>
-                    <button class="filter-btn lager @(selectedAreaFilter == AreaType.Lager ? "active" : "")" 
-                            @onclick="() => FilterLocationsByArea(AreaType.Lager)">
-                        🏭 Lager
-                    </button>
-                    <button class="filter-btn werkstatt @(selectedAreaFilter == AreaType.Werkstatt ? "active" : "")" 
-                            @onclick="() => FilterLocationsByArea(AreaType.Werkstatt)">
-                        🔧 Werkstatt
-                    </button>
-                </div>
-
-                @* Row Filter *@
-                <div class="row-filter">
-                    <select class="form-control" @bind="selectedRowFilter" @bind:after="ApplyLocationFilter">
-                        <option value="">Alle Reihen</option>
-                        @for (int r = StorageLocation.MinRow; r <= StorageLocation.MaxRowLager; r++)
+            @if (selectedLocation != null)
+            {
+                <div class="checkin-summary">
+                    <h3 class="summary-title">📋 Zusammenfassung</h3>
+                    <div class="summary-grid">
+                        @if (isInventoryMode)
                         {
-                            <option value="@r">Reihe @r</option>
+                            <div class="summary-item">
+                                <span class="summary-label">Kategorie</span>
+                                <span class="summary-value">📦 @selectedCategory?.Name</span>
+                            </div>
                         }
-                    </select>
+                        else
+                        {
+                            <div class="summary-item">
+                                <span class="summary-label">Kunde</span>
+                                <span class="summary-value">👤 @selectedCustomer?.FullName</span>
+                            </div>
+                            @if (selectedVehicle != null)
+                            {
+                                <div class="summary-item">
+                                    <span class="summary-label">Fahrzeug</span>
+                                    <span class="summary-value">🚗 @selectedVehicle.DisplayName</span>
+                                </div>
+                            }
+                        }
+                        <div class="summary-item">
+                            <span class="summary-label">@(isFelgenCategory ? "Felgen" : "Reifen")</span>
+                            <span class="summary-value">
+                                @(isInventoryMode && useCustomItemCount ? tireStack.ItemCount : TireStack.TiresPerStack) Stück
+                                @if (!isFelgenCategory)
+                                {
+                                    <text> @(tireStack.Season == TireSeason.Sommer ? "☀️" : tireStack.Season == TireSeason.Winter ? "❄️" : "🔄") @tireStack.Season</text>
+                                }
+                            </span>
+                        </div>
+                        @if (!string.IsNullOrEmpty(tireStack.TireSize))
+                        {
+                            <div class="summary-item">
+                                <span class="summary-label">Größe</span>
+                                <span class="summary-value">@tireStack.TireSize @(tireStack.WithRims && !isFelgenCategory ? "| mit Felgen" : "")</span>
+                            </div>
+                        }
+                        @if (!string.IsNullOrEmpty(tireStack.TireBrand) || !string.IsNullOrEmpty(tireStack.TireModel))
+                        {
+                            <div class="summary-item">
+                                <span class="summary-label">Marke</span>
+                                <span class="summary-value">@tireStack.TireBrand @tireStack.TireModel</span>
+                            </div>
+                        }
+                        <div class="summary-item highlight">
+                            <span class="summary-label">Lagerplatz</span>
+                            <span class="summary-value location">
+                                <LocationDisplay Code="@selectedLocation.Code" DisplayMode="LocationDisplayMode.Full" ShowIcon="true" Size="LocationDisplaySize.Small" />
+                            </span>
+                        </div>
+                    </div>
+                    <button class="btn-clear summary-clear" @onclick="ClearSelectedLocation" title="Lagerplatz-Auswahl aufheben">✕</button>
+                </div>
+            }
+
+            @if (locationSelectorCollapsed && selectedLocation != null)
+            {
+                <button type="button" class="location-collapsed-bar" @onclick="ExpandLocationSelector" title="Lagerplatz ändern">
+                    <span class="collapsed-icon">📍</span>
+                    <span class="collapsed-code">@selectedLocation.Code</span>
+                    <span class="collapsed-hint">Lagerplatz ändern ▾</span>
+                </button>
+            }
+            else
+            {
+            <div class="location-selector compact">
+                @* Area & Row Filter combined *@
+                <div class="location-filter-row">
+                    <div class="area-filter">
+                        <button class="filter-btn @(selectedAreaFilter == null ? "active" : "")" 
+                                @onclick="() => FilterLocationsByArea(null)">
+                            Alle
+                        </button>
+                        <button class="filter-btn lager @(selectedAreaFilter == AreaType.Lager ? "active" : "")" 
+                                @onclick="() => FilterLocationsByArea(AreaType.Lager)">
+                            🏭 Lager
+                        </button>
+                        <button class="filter-btn werkstatt @(selectedAreaFilter == AreaType.Werkstatt ? "active" : "")" 
+                                @onclick="() => FilterLocationsByArea(AreaType.Werkstatt)">
+                            🔧 Werkstatt
+                        </button>
+                    </div>
+
+                    <div class="row-filter">
+                        <select class="form-control" @bind="selectedRowFilter" @bind:after="ApplyLocationFilter">
+                            <option value="">Alle Reihen</option>
+                            @for (int r = StorageLocation.MinRow; r <= StorageLocation.MaxRowLager; r++)
+                            {
+                                <option value="@r">Reihe @r</option>
+                            }
+                        </select>
+                    </div>
                 </div>
 
                 @* Location Grid *@
@@ -720,7 +833,7 @@ else
                             <h3 class="area-title">
                                 @(areaGroup.Key == AreaType.Lager ? "🏭" : "🔧") @areaGroup.Key.GetDisplayName()
                             </h3>
-                            
+
                             @foreach (var rowGroup in areaGroup.GroupBy(l => l.Row).OrderBy(g => g.Key))
                             {
                                 <div class="row-section">
@@ -742,16 +855,6 @@ else
                     }
                 }
             </div>
-
-            @if (selectedLocation != null)
-            {
-                <div class="selected-location">
-                    <div class="location-icon">📍</div>
-                    <div class="location-info">
-                        <LocationDisplay Code="@selectedLocation.Code" DisplayMode="LocationDisplayMode.Full" ShowIcon="false" />
-                    </div>
-                    <button class="btn-clear" @onclick="ClearSelectedLocation">✕</button>
-                </div>
             }
 
             @if (!string.IsNullOrEmpty(errorMessage))
@@ -873,6 +976,159 @@ else
         </div>
     </div>
 }
+
+<QrScannerModal @bind-IsOpen="showQrScanner"
+                Title="Reifen-Report scannen"
+                Subtitle="@(selectedCustomer != null ? $"Kunde: {selectedCustomer.FullName}" : null)"
+                OnScanned="OnQrScanned" />
+
+@* Report preview / assignment modal *@
+@if (scannedReport != null)
+{
+    <div class="report-overlay" @onclick="CloseReportModal">
+        <div class="report-dialog" role="dialog" aria-modal="true" aria-labelledby="report-title" @onclick:stopPropagation="true">
+            <div class="report-header">
+                <div>
+                    <h3 id="report-title">📋 Reifen-Report</h3>
+                    <p class="report-subtitle">
+                        Nr. <span class="mono">@scannedReport.RecordSn</span>
+                        @if (scannedReport.MeasuredAt.HasValue)
+                        {
+                            <text> · gemessen am @scannedReport.MeasuredAt.Value.ToLocalTime().ToString("dd.MM.yyyy HH:mm")</text>
+                        }
+                    </p>
+                </div>
+                <button type="button" class="report-close" @onclick="CloseReportModal" aria-label="Schließen">✕</button>
+            </div>
+
+            <div class="report-body">
+                @if (!scannedReport.HasTreadData)
+                {
+                    <div class="report-warning">
+                        ⚠️ Der Report enthält keine Profiltiefen-Werte. Werte können unten manuell ergänzt werden.
+                    </div>
+                }
+
+                <div class="report-meta">
+                    <div class="form-group">
+                        <label>Kennzeichen</label>
+                        <input type="text" class="form-control" @bind="scannedReport.LicensePlate" placeholder="z.B. ND-XX 123" />
+                    </div>
+                    <div class="form-group">
+                        <label>Kilometerstand</label>
+                        <input type="number" class="form-control" @bind="scannedReport.Mileage" min="0" placeholder="km" />
+                    </div>
+                </div>
+
+                <div class="tread-grid" role="group" aria-label="Profiltiefen">
+                    <div class="tread-cell rating-@RatingClass(scannedReport, scannedReport.TreadDepthFL)">
+                        <label>Vorne links</label>
+                        <div class="tread-input"><input type="number" step="0.1" min="0" max="20" class="form-control" @bind="scannedReport.TreadDepthFL" /><span>mm</span></div>
+                    </div>
+                    <div class="tread-cell rating-@RatingClass(scannedReport, scannedReport.TreadDepthFR)">
+                        <label>Vorne rechts</label>
+                        <div class="tread-input"><input type="number" step="0.1" min="0" max="20" class="form-control" @bind="scannedReport.TreadDepthFR" /><span>mm</span></div>
+                    </div>
+                    <div class="tread-cell rating-@RatingClass(scannedReport, scannedReport.TreadDepthRL)">
+                        <label>Hinten links</label>
+                        <div class="tread-input"><input type="number" step="0.1" min="0" max="20" class="form-control" @bind="scannedReport.TreadDepthRL" /><span>mm</span></div>
+                    </div>
+                    <div class="tread-cell rating-@RatingClass(scannedReport, scannedReport.TreadDepthRR)">
+                        <label>Hinten rechts</label>
+                        <div class="tread-input"><input type="number" step="0.1" min="0" max="20" class="form-control" @bind="scannedReport.TreadDepthRR" /><span>mm</span></div>
+                    </div>
+                </div>
+
+                @if (!string.IsNullOrEmpty(scannedReport.Recommendation))
+                {
+                    <div class="report-recommendation">💡 @scannedReport.Recommendation</div>
+                }
+
+                <a class="report-link" href="@scannedReport.ReportUrl" target="_blank" rel="noopener">Original-Report öffnen ↗</a>
+
+                <div class="report-choice">
+                    <h4>Wie sollen die Daten verwendet werden?</h4>
+
+                    <div class="report-choice-buttons">
+                        <button type="button" class="choice-btn @(reportMode == ReportAssignMode.Existing ? "active" : "")"
+                                @onclick="() => SetReportMode(ReportAssignMode.Existing)"
+                                disabled="@(customerStacksForReport.Count == 0)">
+                            <span class="choice-icon">📦</span>
+                            <span class="choice-title">Zu vorhandenem Satz</span>
+                            <span class="choice-sub">@(customerStacksForReport.Count == 0 ? "Keine Sätze vorhanden" : $"{customerStacksForReport.Count} Satz/Sätze des Kunden")</span>
+                        </button>
+                        <button type="button" class="choice-btn @(reportMode == ReportAssignMode.New ? "active" : "")"
+                                @onclick="() => SetReportMode(ReportAssignMode.New)">
+                            <span class="choice-icon">✨</span>
+                            <span class="choice-title">Neuen Satz anlegen</span>
+                            <span class="choice-sub">Daten ins Formular übernehmen</span>
+                        </button>
+                    </div>
+
+                    @if (reportMode == ReportAssignMode.Existing)
+                    {
+                        <div class="stack-pick-list" role="list">
+                            @foreach (var s in customerStacksForReport)
+                            {
+                                <button type="button" class="stack-pick-item @(reportTargetStackId == s.Id ? "selected" : "")" role="listitem"
+                                        @onclick="() => reportTargetStackId = s.Id">
+                                    <span class="stack-pick-main">
+                                        <span class="mono">@s.TicketNumber</span>
+                                        <span>@(s.Season == TireSeason.Sommer ? "☀️" : s.Season == TireSeason.Winter ? "❄️" : "🔄") @s.Season</span>
+                                        @if (!string.IsNullOrEmpty(s.TireSize)) { <span>@s.TireSize</span> }
+                                    </span>
+                                    <span class="stack-pick-sub">
+                                        @s.StatusText
+                                        @if (s.Vehicle != null) { <text> · 🚗 @s.Vehicle.ShortName</text> }
+                                        @if (s.StorageLocation != null) { <text> · @s.StorageLocation.Code</text> }
+                                    </span>
+                                </button>
+                            }
+                        </div>
+                    }
+                </div>
+
+                @if (!string.IsNullOrEmpty(reportError))
+                {
+                    <div class="report-warning">⚠️ @reportError</div>
+                }
+            </div>
+
+            <div class="report-footer">
+                <button type="button" class="btn btn-outline" @onclick="CloseReportModal">Abbrechen</button>
+                @if (reportMode == ReportAssignMode.Existing)
+                {
+                    <button type="button" class="btn btn-primary" @onclick="AttachReportToExisting" disabled="@(reportTargetStackId == null || isProcessing)">
+                        @if (isProcessing) { <span class="spinner"></span> }
+                        <span>Zum Satz hinzufügen</span>
+                    </button>
+                }
+                else
+                {
+                    <button type="button" class="btn btn-primary" @onclick="ApplyReportToNew">
+                        <span>Für neuen Satz übernehmen</span>
+                    </button>
+                }
+            </div>
+        </div>
+    </div>
+}
+
+@* Report attached to existing stack – success *@
+@if (reportAttachedTo != null)
+{
+    <div class="report-overlay" @onclick="() => reportAttachedTo = null">
+        <div class="report-dialog report-success" role="dialog" aria-modal="true" @onclick:stopPropagation="true">
+            <div class="success-icon">✓</div>
+            <h3>Report gespeichert</h3>
+            <p>Die Messwerte wurden dem Satz <span class="mono">@reportAttachedTo.TicketNumber</span> hinzugefügt.</p>
+            <div class="report-footer center">
+                <button type="button" class="btn btn-outline" @onclick="() => reportAttachedTo = null">Weiter erfassen</button>
+                <button type="button" class="btn btn-primary" @onclick="ResetForm">Fertig</button>
+            </div>
+        </div>
+    </div>
+}
 }
 
 @code {
@@ -923,6 +1179,179 @@ else
     private string? zoomImageUrl;
     private string? zoomImageTitle;
 
+    // QR report
+    private enum ReportAssignMode { Existing, New }
+    private bool showQrScanner;
+    private bool isLoadingReport;
+    private TireReportData? scannedReport;
+    private TireReportData? pendingReport;
+    private ReportAssignMode reportMode = ReportAssignMode.New;
+    private List<TireStack> customerStacksForReport = new();
+    private Guid? reportTargetStackId;
+    private string? reportError;
+    private TireStack? reportAttachedTo;
+    private const int NotesMaxLength = 1000;
+
+    private static string RatingClass(TireMeasureRating r) => r switch
+    {
+        TireMeasureRating.Ok => "ok",
+        TireMeasureRating.Warning => "warn",
+        TireMeasureRating.Critical => "crit",
+        _ => "none"
+    };
+
+    private static string RatingClass(TireReportData r, decimal? mm) => RatingClass(TireInspection.RateDepth(mm, r.CriticalThreshold, r.WarningThreshold));
+
+    private RenderFragment<TireReportData> ReportSummaryFragment => report => __builder =>
+    {
+        <div class="report-summary">
+            @if (!string.IsNullOrEmpty(report.LicensePlate)) { <span class="report-chip">🚗 @report.LicensePlate</span> }
+            @if (report.Mileage.HasValue) { <span class="report-chip">@report.Mileage.Value.ToString("N0", System.Globalization.CultureInfo.GetCultureInfo("de-DE")) km</span> }
+            <span class="report-chip rating-@RatingClass(report, report.TreadDepthFL)">VL @Fmt(report.TreadDepthFL)</span>
+            <span class="report-chip rating-@RatingClass(report, report.TreadDepthFR)">VR @Fmt(report.TreadDepthFR)</span>
+            <span class="report-chip rating-@RatingClass(report, report.TreadDepthRL)">HL @Fmt(report.TreadDepthRL)</span>
+            <span class="report-chip rating-@RatingClass(report, report.TreadDepthRR)">HR @Fmt(report.TreadDepthRR)</span>
+        </div>
+    };
+
+    private static string Fmt(decimal? mm) => mm.HasValue ? mm.Value.ToString("0.0", System.Globalization.CultureInfo.GetCultureInfo("de-DE")) + " mm" : "–";
+
+    private void OpenQrScanner()
+    {
+        reportError = null;
+        showQrScanner = true;
+    }
+
+    private async Task OnQrScanned(string text)
+    {
+        showQrScanner = false;
+
+        if (selectedCustomer == null)
+        {
+            errorMessage = "Bitte zuerst einen Kunden auswählen.";
+            return;
+        }
+
+        if (!TireReportService.TryParseReportUrl(text, out var recordSn, out _))
+        {
+            errorMessage = "Der QR-Code enthält keinen gültigen Reifen-Report-Link.";
+            return;
+        }
+
+        isLoadingReport = true;
+        errorMessage = null;
+        StateHasChanged();
+
+        try
+        {
+            var report = await TireReportService.FetchAsync(recordSn);
+
+            var stacks = await TireStackService.GetByCustomerAsync(selectedCustomer.Id);
+            customerStacksForReport = stacks
+                .Where(s => s.IsActive && s.Status != TireStackStatus.PickedUp)
+                .OrderByDescending(s => selectedVehicle != null && s.VehicleId == selectedVehicle.Id)
+                .ThenByDescending(s => s.Status == TireStackStatus.Stored)
+                .ThenByDescending(s => s.StoredAt)
+                .ToList();
+
+            reportMode = customerStacksForReport.Count > 0 ? ReportAssignMode.Existing : ReportAssignMode.New;
+            reportTargetStackId = customerStacksForReport.FirstOrDefault()?.Id;
+            reportError = null;
+            scannedReport = report;
+        }
+        catch (TireReportException ex)
+        {
+            errorMessage = ex.Message;
+        }
+        catch (Exception ex)
+        {
+            errorMessage = $"Report konnte nicht verarbeitet werden: {ex.Message}";
+        }
+        finally
+        {
+            isLoadingReport = false;
+        }
+    }
+
+    private void SetReportMode(ReportAssignMode mode)
+    {
+        reportMode = mode;
+        reportError = null;
+    }
+
+    private void CloseReportModal()
+    {
+        scannedReport = null;
+        reportError = null;
+    }
+
+    private async Task AttachReportToExisting()
+    {
+        if (scannedReport == null || reportTargetStackId == null) return;
+
+        isProcessing = true;
+        reportError = null;
+        StateHasChanged();
+
+        try
+        {
+            scannedReport.RecomputeRatings();
+            await TireStackService.AddInspectionAsync(scannedReport.ToInspection(reportTargetStackId.Value, UserSession.CurrentUser?.Id));
+            reportAttachedTo = customerStacksForReport.FirstOrDefault(s => s.Id == reportTargetStackId.Value);
+            scannedReport = null;
+        }
+        catch (Exception ex)
+        {
+            reportError = $"Speichern fehlgeschlagen: {ex.Message}";
+        }
+        finally
+        {
+            isProcessing = false;
+        }
+    }
+
+    private void ApplyReportToNew()
+    {
+        if (scannedReport == null) return;
+
+        scannedReport.RecomputeRatings();
+        pendingReport = scannedReport;
+        scannedReport = null;
+
+        var de = System.Globalization.CultureInfo.GetCultureInfo("de-DE");
+        var lines = new List<string>();
+        if (!string.IsNullOrEmpty(pendingReport.LicensePlate)) lines.Add($"Kennzeichen: {pendingReport.LicensePlate}");
+        if (pendingReport.Mileage.HasValue) lines.Add($"km-Stand: {pendingReport.Mileage.Value.ToString("N0", de)}");
+        if (pendingReport.HasTreadData)
+            lines.Add($"Profil VL {Fmt(pendingReport.TreadDepthFL)} / VR {Fmt(pendingReport.TreadDepthFR)} / HL {Fmt(pendingReport.TreadDepthRL)} / HR {Fmt(pendingReport.TreadDepthRR)}");
+        if (!string.IsNullOrEmpty(pendingReport.Recommendation)) lines.Add(pendingReport.Recommendation);
+
+        var block = string.Join("\n", lines);
+        if (!string.IsNullOrWhiteSpace(block))
+        {
+            var merged = string.IsNullOrWhiteSpace(tireStack.Notes) ? block : tireStack.Notes.TrimEnd() + "\n" + block;
+            tireStack.Notes = merged.Length <= NotesMaxLength ? merged : merged[..NotesMaxLength];
+            showDetailsExpanded = true;
+        }
+
+        if (pendingReport.HasTreadData)
+        {
+            var minDepth = new[] { pendingReport.TreadDepthFL, pendingReport.TreadDepthFR, pendingReport.TreadDepthRL, pendingReport.TreadDepthRR }
+                .Where(v => v.HasValue).Select(v => v!.Value).Min();
+            tireStack.Condition = minDepth < TireInspection.DefaultWarningThreshold ? TireCondition.Poor
+                : minDepth < 5m ? TireCondition.Fair
+                : TireCondition.Good;
+        }
+
+        _ = SaveDraftAsync();
+    }
+
+    private void RemovePendingReport()
+    {
+        pendingReport = null;
+        _ = SaveDraftAsync();
+    }
+
     // Computed helpers
     private bool isFelgenCategory => isInventoryMode && selectedCategory?.Type == CatalogItemType.Felgen;
 
@@ -954,8 +1383,16 @@ else
     // Cleared on successful CompleteCheckin and on ResetForm.
     // ------------------------------------------------------------------
     private const string DraftKey = "tire-checkin";
+    private static readonly System.Text.Json.JsonSerializerOptions DraftJsonOptions = new()
+    {
+        ReferenceHandler = System.Text.Json.Serialization.ReferenceHandler.IgnoreCycles,
+        DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull
+    };
     private bool _draftRestoreAttempted;
     private bool _isRestoringDraft;
+
+    [SupplyParameterFromQuery(Name = "customerId")]
+    public Guid? PreselectedCustomerId { get; set; }
     private CancellationTokenSource? _draftDebounceCts;
     private CancellationTokenSource? _searchDebounceCts;
     private readonly SemaphoreSlim _searchLock = new(1, 1);
@@ -965,10 +1402,37 @@ else
         if (firstRender && UserSession.IsWorkerOrAdmin && !_draftRestoreAttempted)
         {
             _draftRestoreAttempted = true;
+
+            if (PreselectedCustomerId.HasValue)
+            {
+                await PreselectCustomerAsync(PreselectedCustomerId.Value);
+                return;
+            }
+
             await TryRestoreDraftAsync();
         }
     }
 
+    private async Task PreselectCustomerAsync(Guid customerId)
+    {
+        try
+        {
+            var customer = await CustomerService.GetByIdAsync(customerId);
+            if (customer == null) return;
+
+            try { await JS.InvokeVoidAsync("appInterop.clearDraft", DraftKey); } catch { }
+
+            isInventoryMode = false;
+            await SelectCustomer(customer);
+            GoToStep2();
+            StateHasChanged();
+        }
+        catch (Exception ex)
+        {
+            errorMessage = $"Kunde konnte nicht geladen werden: {ex.Message}";
+        }
+    }
+
     private async Task TryRestoreDraftAsync()
     {
         try
@@ -976,7 +1440,7 @@ else
             var json = await JS.InvokeAsync<string?>("appInterop.loadDraft", DraftKey);
             if (string.IsNullOrWhiteSpace(json)) return;
 
-            var draft = System.Text.Json.JsonSerializer.Deserialize<CheckinDraft>(json);
+            var draft = System.Text.Json.JsonSerializer.Deserialize<CheckinDraft>(json, DraftJsonOptions);
             if (draft == null) return;
 
             _isRestoringDraft = true;
@@ -1012,6 +1476,8 @@ else
                     tireStack = draft.TireStack;
                 }
 
+                pendingReport = draft.PendingReport;
+
                 if (draft.SelectedLocationId.HasValue)
                 {
                     selectedLocation = allLocations.FirstOrDefault(l => l.Id == draft.SelectedLocationId.Value);
@@ -1083,10 +1549,11 @@ else
                 SelectedLocationId = selectedLocation?.Id,
                 UseCustomItemCount = useCustomItemCount,
                 ShowDetailsExpanded = showDetailsExpanded,
-                TireStack = tireStack
+                TireStack = tireStack,
+                PendingReport = pendingReport
             };
 
-            var json = System.Text.Json.JsonSerializer.Serialize(draft);
+            var json = System.Text.Json.JsonSerializer.Serialize(draft, DraftJsonOptions);
             await JS.InvokeVoidAsync("appInterop.saveDraft", DraftKey, json);
             await JS.InvokeVoidAsync("appInterop.setUnsaved", HasMeaningfulDraft());
         }
@@ -1127,6 +1594,7 @@ else
         public bool UseCustomItemCount { get; set; }
         public bool ShowDetailsExpanded { get; set; }
         public TireStack? TireStack { get; set; }
+        public TireReportData? PendingReport { get; set; }
     }
 
     private async Task LoadLocations()
@@ -1251,6 +1719,8 @@ else
             selectedVehicle = null;
         }
 
+        ApplyVehicleTireSize();
+
         _ = SaveDraftAsync();
     }
 
@@ -1258,9 +1728,26 @@ else
     {
         selectedVehicle = vehicle;
         showAddVehicleForm = false;
+        ApplyVehicleTireSize();
         _ = SaveDraftAsync();
     }
 
+    /// <summary>
+    /// Übernimmt die Reifengröße des gewählten Fahrzeugs in den Reifenstapel,
+    /// sofern noch keine (abweichende) Größe manuell erfasst wurde.
+    /// </summary>
+    private void ApplyVehicleTireSize()
+    {
+        if (isInventoryMode) return;
+        if (string.IsNullOrWhiteSpace(selectedVehicle?.TireSize)) return;
+
+        if (string.IsNullOrWhiteSpace(tireStack.TireSize) || tireSizeFromVehicle)
+        {
+            OnTireSizeChanged(selectedVehicle.TireSize);
+            tireSizeFromVehicle = true;
+        }
+    }
+
     private void ShowNewVehicleForm()
     {
         showAddVehicleForm = true;
@@ -1285,6 +1772,7 @@ else
             showAddVehicleForm = false;
             newVehicle = new Vehicle();
             errorMessage = null;
+            ApplyVehicleTireSize();
         }
         catch (Exception ex)
         {
@@ -1344,6 +1832,7 @@ else
             newCustomer = new Customer();
             newVehicle = new Vehicle();
             errorMessage = null;
+            ApplyVehicleTireSize();
         }
         catch (Exception ex)
         {
@@ -1441,6 +1930,7 @@ else
     private async Task GoToStep3()
     {
         await LoadLocations();
+        locationSelectorCollapsed = selectedLocation != null;
         currentStep = 3;
         _ = SaveDraftAsync();
     }
@@ -1451,18 +1941,27 @@ else
         _ = SaveDraftAsync();
     }
 
+    private bool locationSelectorCollapsed;
+
     private void SelectLocation(StorageLocation location)
     {
         if (!location.IsOccupied && location.IsAvailable)
         {
             selectedLocation = location;
+            locationSelectorCollapsed = true;
             _ = SaveDraftAsync();
         }
     }
 
+    private void ExpandLocationSelector()
+    {
+        locationSelectorCollapsed = false;
+    }
+
     private void ClearSelectedLocation()
     {
         selectedLocation = null;
+        locationSelectorCollapsed = false;
     }
 
     private async Task CompleteCheckin()
@@ -1501,6 +2000,19 @@ else
 
             createdTireStack = created;
 
+            if (pendingReport != null)
+            {
+                try
+                {
+                    await TireStackService.AddInspectionAsync(pendingReport.ToInspection(created.Id, UserSession.CurrentUser?.Id));
+                }
+                catch (Exception ex)
+                {
+                    errorMessage = $"Stapel eingelagert, Report konnte aber nicht gespeichert werden: {ex.Message}";
+                }
+                pendingReport = null;
+            }
+
             currentStep = 4;
             await ClearDraftAsync();
         }
@@ -1533,9 +2045,11 @@ else
         showAddVehicleForm = false;
         tireStack = new TireStack();
         showDetailsExpanded = false;
+        tireSizeFromVehicle = false;
         selectedLocation = null;
         selectedAreaFilter = null;
         selectedRowFilter = null;
+        locationSelectorCollapsed = false;
         createdTireStack = null;
         errorMessage = null;
         useCustomItemCount = false;
@@ -1544,6 +2058,13 @@ else
         showImageZoom = false;
         zoomImageUrl = null;
         zoomImageTitle = null;
+        showQrScanner = false;
+        scannedReport = null;
+        pendingReport = null;
+        reportAttachedTo = null;
+        reportError = null;
+        customerStacksForReport.Clear();
+        reportTargetStackId = null;
         _ = ClearDraftAsync();
     }
 
@@ -1563,8 +2084,14 @@ else
         tireStack.RimSize = isAlu ? "Alu" : "Stahl";
     }
 
+    private bool tireSizeFromVehicle;
+
     private void OnTireSizeChanged(string? value)
     {
+        if (tireStack.TireSize != value && value != selectedVehicle?.TireSize)
+        {
+            tireSizeFromVehicle = false;
+        }
         tireStack.TireSize = value;
 
         // Auto-derive rim size from the R value of the tire size (e.g. "225/45 R17" -> "17 Zoll")