From 697eea20c057e89a7ffcade77bc0738cf0c5391b Mon Sep 17 00:00:00 2001
From: 6d486f49 <76097bcc@gmail.com>
Date: Thu, 11 Jun 2026 16:36:25 -0400
Subject: [PATCH] ...

---
 Pages/Pages/Database/CatalogPage.razor        |  18 +-
 .../Parts/CatalogEntityDialogComponent.razor  | 733 ++++++++++++++++++
 2 files changed, 747 insertions(+), 4 deletions(-)
 create mode 100644 Pages/Pages/Database/Parts/CatalogEntityDialogComponent.razor

diff --git a/Pages/Pages/Database/CatalogPage.razor b/Pages/Pages/Database/CatalogPage.razor
index 4c2f319..4a5ffe6 100644
--- a/Pages/Pages/Database/CatalogPage.razor
+++ b/Pages/Pages/Database/CatalogPage.razor
@@ -6,7 +6,6 @@
 @implements IDisposable
 
 @inject IEntityDisplayService EntityDisplayService
-@inject NavigationManager NavigationManager
 
 <LayoutLargeContentComponent>
     <WebsiteTitleComponent>Catalog</WebsiteTitleComponent>
@@ -32,7 +31,7 @@
                 @foreach (var entity in searches)
                 {
                     <PaperComponent>
-                        <div class="catalogCard" @onclick="() => NavigateToEntity(entity)">
+                        <div class="catalogCard" @onclick="() => OpenDialog(entity)">
                             <div class="catalogCardHeader">
                                 <span class="catalogCardName">@entity.Info().Name</span>
                                 <span class="catalogCardType type-@(entity.EntityType.ToLower().Replace("_", "-"))">@entity.EntityType.Replace("_", " ")</span>
@@ -113,6 +112,11 @@
     </PaperComponent>
 </LayoutLargeContentComponent>
 
+@if (selectedEntity != null)
+{
+    <CatalogEntityDialogComponent Entity="selectedEntity" OnClose="CloseDialog"/>
+}
+
 <style>
     .catalogResultCount {
         padding: 8px 0 16px 0;
@@ -260,6 +264,7 @@
     List<EntityModel> entities = default!;
     List<EntityModel> searches = default!;
 
+    EntityModel? selectedEntity;
     string selectedFactionType = DataType.Any;
     string selectedImmortalType = DataType.Any;
     string selectedEntityType = EntityType.Army;
@@ -280,9 +285,14 @@
         EntityDisplayService.Unsubscribe(StateHasChanged);
     }
 
-    void NavigateToEntity(EntityModel entity)
+    void OpenDialog(EntityModel entity)
     {
-        NavigationManager.NavigateTo($"/database/{Uri.EscapeDataString(entity.Info().Name)}");
+        selectedEntity = entity;
+    }
+
+    void CloseDialog()
+    {
+        selectedEntity = null;
     }
 
     void OnChange(EntityFilterEvent filterEntityEvent)
diff --git a/Pages/Pages/Database/Parts/CatalogEntityDialogComponent.razor b/Pages/Pages/Database/Parts/CatalogEntityDialogComponent.razor
new file mode 100644
index 0000000..9121c50
--- /dev/null
+++ b/Pages/Pages/Database/Parts/CatalogEntityDialogComponent.razor
@@ -0,0 +1,733 @@
+@using Model
+@using Model.Entity.Data
+@using Model.Entity.Parts
+
+<div class="catalogDetailOverlay" @onclick="Close">
+    <div class="catalogDetailPanel"
+         @onclick:preventDefault="true"
+         @onclick:stopPropagation="true">
+
+        <div class="detailHeader">
+            <div class="detailHeaderLeft">
+                @if (history.Count > 1)
+                {
+                    <button class="detailBackBtn" @onclick="GoBack" title="Back">&#8592;</button>
+                }
+                <div class="detailName">@Current.Info().Name</div>
+                <span class="detailBadge type-bg-@(Current.EntityType.ToLower().Replace("_", "-"))">@Current.EntityType.Replace("_", " ")</span>
+            </div>
+            <button class="detailCloseBtn" @onclick="Close">&times;</button>
+        </div>
+
+        <div class="detailBody">
+
+            @* Tags row *@
+            <div class="detailTags">
+                @{
+                    var faction = Current.Faction();
+                    var vanguard = Current.VanguardAdded();
+                }
+                @if (faction != null)
+                {
+                    var facName = EntityData.Get().TryGetValue(faction.Faction, out var fac) ? fac.Info().Name : "";
+                    <span class="detailTag">@facName</span>
+                }
+                @if (vanguard != null)
+                {
+                    var immName = EntityData.Get().TryGetValue(vanguard.ImmortalId, out var imm) ? imm.Info().Name : "";
+                    <span class="detailTag detailTagImmortal">@immName</span>
+                }
+                @if (Current.Info().Descriptive != "None")
+                {
+                    <span class="detailTag detailTagDesc">@Current.Info().Descriptive.Replace("_", " ")</span>
+                }
+            </div>
+
+            @* Stats grid *@
+            @{
+                var vitality = Current.Vitality();
+                var supply = Current.Supply();
+                var tier = Current.Tier();
+                var movement = Current.Movement();
+                var hotkey = Current.Hotkey();
+            }
+            @if ((vitality != null && vitality.Health > 0) || tier != null || supply != null || movement != null)
+            {
+                <div class="detailSection">
+                    <div class="detailStatGrid">
+                        @if (vitality != null && vitality.Health > 0)
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue">@vitality.Health</span>
+                                <span class="detailStatLabel">Health</span>
+                            </div>
+                        }
+                        @if (vitality != null && vitality.DefenseLayer > 0)
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue">@vitality.DefenseLayer</span>
+                                <span class="detailStatLabel">Defense</span>
+                            </div>
+                        }
+                        @if (tier != null && tier.Tier > 0)
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue">T@(tier.Tier)</span>
+                                <span class="detailStatLabel">Tier</span>
+                            </div>
+                        }
+                        @if (supply != null && (supply.Takes > 0 || supply.Grants > 0))
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue">@supply.Takes@(supply.Grants > 0 ? $"/{supply.Grants}" : "")</span>
+                                <span class="detailStatLabel">Supply</span>
+                            </div>
+                        }
+                        @if (movement != null && movement.Speed > 0)
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue">@movement.Speed.ToString("F1")</span>
+                                <span class="detailStatLabel">Speed</span>
+                            </div>
+                        }
+                        @if (vitality != null && vitality.Vision > 0)
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue">@vitality.Vision</span>
+                                <span class="detailStatLabel">Sight</span>
+                            </div>
+                        }
+                        @if (vitality != null && vitality.Energy > 0)
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue">@vitality.Energy</span>
+                                <span class="detailStatLabel">Energy</span>
+                            </div>
+                        }
+                        @if (vitality != null && !string.IsNullOrEmpty(vitality.Armor) && vitality.Armor != "None")
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue" style="font-size:0.85rem">@vitality.Armor</span>
+                                <span class="detailStatLabel">Armor</span>
+                            </div>
+                        }
+                        @if (hotkey != null && !string.IsNullOrEmpty(hotkey.Hotkey))
+                        {
+                            <div class="detailStatCard">
+                                <span class="detailStatValue">@hotkey.Hotkey</span>
+                                <span class="detailStatLabel">@hotkey.HotkeyGroup</span>
+                            </div>
+                        }
+                    </div>
+                </div>
+            }
+
+            @* Cost *@
+            @{
+                var prod = Current.Production();
+            }
+            @if (prod != null && (prod.Alloy > 0 || prod.Ether > 0 || prod.Pyre > 0 || prod.Energy > 0 || prod.BuildTime > 0))
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Cost</div>
+                    <div class="detailCostRow">
+                        @if (prod.Alloy > 0)
+                        {
+                            <span class="detailCost">A @prod.Alloy</span>
+                        }
+                        @if (prod.Ether > 0)
+                        {
+                            <span class="detailCost">E @prod.Ether</span>
+                        }
+                        @if (prod.Pyre > 0)
+                        {
+                            <span class="detailCost">P @prod.Pyre</span>
+                        }
+                        @if (prod.Energy > 0)
+                        {
+                            <span class="detailCost">En @prod.Energy</span>
+                        }
+                        @if (prod.BuildTime > 0)
+                        {
+                            <span class="detailCost">@prod.BuildTime s</span>
+                        }
+                    </div>
+                    @if (!string.IsNullOrEmpty(prod.ProducedBy))
+                    {
+                        var producerName = EntityData.Get().TryGetValue(prod.ProducedBy, out var producer) ? producer.Info().Name : prod.ProducedBy;
+                        <div class="detailProducedBy">Built at: @producerName</div>
+                    }
+                </div>
+            }
+
+            @* Description *@
+            @if (!string.IsNullOrEmpty(Current.Info().Description))
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Description</div>
+                    <div class="detailDescription">@Current.Info().Description</div>
+                    @if (!string.IsNullOrEmpty(Current.Info().FlavorText))
+                    {
+                        <div class="detailFlavor">@((MarkupString)Current.Info().FlavorText)</div>
+                    }
+                </div>
+            }
+
+            @* Weapons *@
+            @{
+                var weapons = Current.Weapons();
+            }
+            @if (weapons.Any())
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Weapons</div>
+                    @foreach (var weapon in weapons)
+                    {
+                        <div class="detailWeapon">
+                            <div class="detailWeaponRow">
+                                <span class="detailWeaponDmg">@weapon.Damage dmg</span>
+                                @if (weapon.AttacksPerSecond > 0)
+                                {
+                                    <span class="detailWeaponStat">@weapon.AttacksPerSecond.ToString("F2") APS</span>
+                                }
+                                <span class="detailWeaponStat">Rng @weapon.Range</span>
+                                @if (weapon.MinimumRange > 0)
+                                {
+                                    <span class="detailWeaponStat">Min @weapon.MinimumRange</span>
+                                }
+                                <span class="detailWeaponStat">@weapon.Targets</span>
+                                @if (weapon.HasSplash)
+                                {
+                                    <span class="detailWeaponTag">Splash</span>
+                                }
+                            </div>
+                            @if (weapon.LightDamage > 0 || weapon.MediumDamage > 0 || weapon.HeavyDamage > 0)
+                            {
+                                <div class="detailWeaponDmgBreakdown">
+                                    @if (weapon.LightDamage > 0)
+                                    {
+                                        <span class="dmgLight">L: @weapon.LightDamage</span>
+                                    }
+                                    @if (weapon.MediumDamage > 0)
+                                    {
+                                        <span class="dmgMedium">M: @weapon.MediumDamage</span>
+                                    }
+                                    @if (weapon.HeavyDamage > 0)
+                                    {
+                                        <span class="dmgHeavy">H: @weapon.HeavyDamage</span>
+                                    }
+                                </div>
+                            }
+                        </div>
+                    }
+                </div>
+            }
+
+            @* Abilities *@
+            @{
+                var abilityIds = Current.IdAbilities();
+            }
+            @if (abilityIds.Any())
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Abilities</div>
+                    <div class="detailRefList">
+                        @foreach (var abil in abilityIds)
+                        {
+                            var target = EntityData.Get().TryGetValue(abil.Id, out var a) ? a : null;
+                            <button class="detailRefItem" @onclick="() => NavigateTo(abil.Id)">
+                                <span class="detailRefBullet">&rarr;</span>
+                                @(target?.Info().Name ?? abil.Id)
+                                @if (target != null && target.Info().Descriptive != "None")
+                                {
+                                    <span class="detailRefDesc">@target.Info().Descriptive.Replace("_", " ")</span>
+                                }
+                            </button>
+                        }
+                    </div>
+                </div>
+            }
+
+            @* Passives *@
+            @{
+                var passives = Current.Passives();
+                var passiveIds = Current.IdPassives();
+            }
+            @if (passives.Any() || passiveIds.Any())
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Passives</div>
+                    @foreach (var p in passives)
+                    {
+                        <div class="detailPassive">
+                            <div class="detailPassiveName">@p.Name</div>
+                            <div class="detailPassiveDesc">@p.Description</div>
+                        </div>
+                    }
+                    @if (passiveIds.Any())
+                    {
+                        <div class="detailRefList">
+                            @foreach (var pid in passiveIds)
+                            {
+                                var target = EntityData.Get().TryGetValue(pid.Id, out var p) ? p : null;
+                                <button class="detailRefItem" @onclick="() => NavigateTo(pid.Id)">
+                                    <span class="detailRefBullet">&rarr;</span>
+                                    @(target?.Info().Name ?? pid.Id)
+                                </button>
+                            }
+                        </div>
+                    }
+                </div>
+            }
+
+            @* Mechanics *@
+            @{
+                var mechanics = Current.Mechanics();
+            }
+            @if (mechanics.Any())
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Mechanics</div>
+                    @foreach (var m in mechanics)
+                    {
+                        <div class="detailPassive">
+                            <div class="detailPassiveName">@m.Name</div>
+                            <div class="detailPassiveDesc">@m.Description</div>
+                        </div>
+                    }
+                </div>
+            }
+
+            @* Upgrades *@
+            @{
+                var upgradeIds = Current.IdUpgrades();
+            }
+            @if (upgradeIds.Any())
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Upgrades</div>
+                    <div class="detailRefList">
+                        @foreach (var uid in upgradeIds)
+                        {
+                            var target = EntityData.Get().TryGetValue(uid.Id, out var u) ? u : null;
+                            <button class="detailRefItem" @onclick="() => NavigateTo(uid.Id)">
+                                <span class="detailRefBullet">&rarr;</span>
+                                @(target?.Info().Name ?? uid.Id)
+                            </button>
+                        }
+                    </div>
+                </div>
+            }
+
+            @* Vanguards *@
+            @{
+                var vanguardIds = Current.IdVanguards();
+                var vanguardAdded = Current.VanguardAdded();
+            }
+            @if (vanguardIds.Any())
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Vanguard Units</div>
+                    <div class="detailRefList">
+                        @foreach (var vid in vanguardIds)
+                        {
+                            var target = EntityData.Get().TryGetValue(vid.Id, out var v) ? v : null;
+                            <button class="detailRefItem" @onclick="() => NavigateTo(vid.Id)">
+                                <span class="detailRefBullet">&rarr;</span>
+                                @(target?.Info().Name ?? vid.Id)
+                            </button>
+                        }
+                    </div>
+                </div>
+            }
+
+            @* Notes *@
+            @if (!string.IsNullOrEmpty(Current.Info().Notes))
+            {
+                <div class="detailSection">
+                    <div class="detailSectionTitle">Notes</div>
+                    <div class="detailDescription">@Current.Info().Notes</div>
+                </div>
+            }
+
+        </div>
+    </div>
+</div>
+
+<style>
+    .catalogDetailOverlay {
+        position: fixed;
+        top: 0;
+        right: 0;
+        width: 100vw;
+        height: 100vh;
+        background-color: rgba(0, 0, 0, 0.5);
+        display: flex;
+        justify-content: flex-end;
+        z-index: 1000;
+    }
+
+    .catalogDetailPanel {
+        width: 620px;
+        max-width: 100%;
+        height: 100vh;
+        background-color: var(--paper);
+        border-left: 2px solid var(--paper-border);
+        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.4);
+        display: flex;
+        flex-direction: column;
+        animation: slideIn 0.2s ease-out;
+    }
+
+    @@keyframes slideIn {
+        from { transform: translateX(100%); }
+        to { transform: translateX(0); }
+    }
+
+    .detailHeader {
+        display: flex;
+        align-items: center;
+        justify-content: space-between;
+        padding: 14px 20px;
+        border-bottom: 1px solid var(--paper-border);
+        background-color: var(--accent);
+        gap: 10px;
+        flex-shrink: 0;
+    }
+
+    .detailHeaderLeft {
+        display: flex;
+        align-items: center;
+        gap: 8px;
+        min-width: 0;
+    }
+
+    .detailBackBtn {
+        background: none;
+        border: none;
+        color: rgba(255, 255, 255, 0.8);
+        font-size: 1.3rem;
+        cursor: pointer;
+        padding: 2px 6px;
+        border-radius: 6px;
+        transition: background 0.15s, color 0.15s;
+        line-height: 1;
+    }
+
+    .detailBackBtn:hover {
+        background: rgba(255, 255, 255, 0.15);
+        color: #fff;
+    }
+
+    .detailName {
+        font-size: 1.25rem;
+        font-weight: 800;
+        color: #fff;
+        white-space: nowrap;
+        overflow: hidden;
+        text-overflow: ellipsis;
+    }
+
+    .detailBadge {
+        font-size: 0.65rem;
+        padding: 3px 10px;
+        border-radius: 4px;
+        font-weight: 700;
+        text-transform: uppercase;
+        letter-spacing: 0.5px;
+        white-space: nowrap;
+        color: #fff;
+        flex-shrink: 0;
+    }
+
+    .type-bg-army { background: #1a6b8a; }
+    .type-bg-building { background: #5a7a1a; }
+    .type-bg-building-upgrade { background: #4a6a0a; }
+    .type-bg-ability { background: #8a1a6b; }
+    .type-bg-passive { background: #8a6b1a; }
+    .type-bg-immortal { background: #6b1a8a; }
+    .type-bg-worker { background: #1a6b4a; }
+    .type-bg-tech { background: #3a1a6b; }
+    .type-bg-spell { background: #1a3a8a; }
+    .type-bg-faction { background: #6b3a1a; }
+    .type-bg-command { background: #3a6b2a; }
+    .type-bg-none { background: #444; }
+
+    .detailCloseBtn {
+        background: none;
+        border: none;
+        color: rgba(255, 255, 255, 0.7);
+        font-size: 1.5rem;
+        cursor: pointer;
+        padding: 0;
+        line-height: 1;
+        width: 32px;
+        height: 32px;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        border-radius: 6px;
+        transition: background 0.15s, color 0.15s;
+        flex-shrink: 0;
+    }
+
+    .detailCloseBtn:hover {
+        background: rgba(255, 255, 255, 0.15);
+        color: #fff;
+    }
+
+    .detailBody {
+        padding: 20px;
+        overflow-y: auto;
+        flex: 1;
+    }
+
+    .detailTags {
+        display: flex;
+        flex-wrap: wrap;
+        gap: 6px;
+        margin-bottom: 20px;
+    }
+
+    .detailTag {
+        font-size: 0.75rem;
+        padding: 4px 12px;
+        border-radius: 12px;
+        background: var(--secondary);
+        color: rgba(255, 255, 255, 0.85);
+        font-weight: 600;
+    }
+
+    .detailTagImmortal {
+        background: #3a1a5a;
+    }
+
+    .detailTagDesc {
+        background: #2a3a4a;
+    }
+
+    .detailSection {
+        margin-bottom: 20px;
+    }
+
+    .detailSectionTitle {
+        font-size: 0.7rem;
+        font-weight: 700;
+        text-transform: uppercase;
+        letter-spacing: 0.8px;
+        opacity: 0.35;
+        margin-bottom: 8px;
+    }
+
+    .detailStatGrid {
+        display: grid;
+        grid-template-columns: repeat(auto-fill, minmax(76px, 1fr));
+        gap: 8px;
+    }
+
+    .detailStatCard {
+        background: var(--secondary);
+        border-radius: 8px;
+        padding: 10px 6px;
+        text-align: center;
+        display: flex;
+        flex-direction: column;
+        gap: 2px;
+    }
+
+    .detailStatValue {
+        font-size: 1.1rem;
+        font-weight: 800;
+        color: #fff;
+    }
+
+    .detailStatLabel {
+        font-size: 0.6rem;
+        text-transform: uppercase;
+        letter-spacing: 0.5px;
+        opacity: 0.45;
+        font-weight: 600;
+    }
+
+    .detailCostRow {
+        display: flex;
+        flex-wrap: wrap;
+        gap: 8px;
+    }
+
+    .detailCost {
+        display: flex;
+        align-items: center;
+        gap: 4px;
+        font-size: 0.85rem;
+        font-weight: 700;
+        padding: 4px 10px;
+        border-radius: 6px;
+        background: var(--secondary);
+        color: #fff;
+    }
+
+    .detailProducedBy {
+        font-size: 0.78rem;
+        opacity: 0.55;
+        margin-top: 6px;
+    }
+
+    .detailDescription {
+        font-size: 0.88rem;
+        line-height: 1.55;
+        opacity: 0.85;
+    }
+
+    .detailFlavor {
+        font-style: italic;
+        opacity: 0.5;
+        margin-top: 8px;
+        font-size: 0.83rem;
+        line-height: 1.5;
+    }
+
+    .detailWeapon {
+        background: var(--secondary);
+        border-radius: 8px;
+        padding: 10px 14px;
+        margin-bottom: 6px;
+    }
+
+    .detailWeaponRow {
+        display: flex;
+        flex-wrap: wrap;
+        gap: 10px;
+        align-items: center;
+        font-size: 0.83rem;
+    }
+
+    .detailWeaponDmg {
+        font-weight: 700;
+        color: #fff;
+    }
+
+    .detailWeaponStat {
+        opacity: 0.65;
+    }
+
+    .detailWeaponTag {
+        font-size: 0.65rem;
+        padding: 2px 8px;
+        border-radius: 4px;
+        background: #4a3a2a;
+        font-weight: 600;
+    }
+
+    .detailWeaponDmgBreakdown {
+        display: flex;
+        gap: 10px;
+        margin-top: 6px;
+        font-size: 0.78rem;
+    }
+
+    .dmgLight { color: #6ba86b; }
+    .dmgMedium { color: #a8a86b; }
+    .dmgHeavy { color: #a86b6b; }
+
+    .detailRefList {
+        display: flex;
+        flex-direction: column;
+        gap: 4px;
+    }
+
+    .detailRefItem {
+        display: flex;
+        align-items: center;
+        gap: 6px;
+        padding: 7px 12px;
+        border-radius: 6px;
+        background: var(--secondary);
+        font-size: 0.83rem;
+        font-weight: 600;
+        cursor: pointer;
+        transition: background 0.15s;
+        border: none;
+        color: inherit;
+        font-family: inherit;
+        text-align: left;
+        width: 100%;
+    }
+
+    .detailRefItem:hover {
+        background: var(--secondary-hover);
+    }
+
+    .detailRefBullet {
+        opacity: 0.4;
+    }
+
+    .detailRefDesc {
+        font-weight: 400;
+        opacity: 0.5;
+        font-size: 0.75rem;
+        margin-left: auto;
+    }
+
+    .detailPassive {
+        background: var(--secondary);
+        border-radius: 8px;
+        padding: 10px 14px;
+        margin-bottom: 6px;
+    }
+
+    .detailPassiveName {
+        font-size: 0.83rem;
+        font-weight: 700;
+        margin-bottom: 2px;
+    }
+
+    .detailPassiveDesc {
+        font-size: 0.78rem;
+        opacity: 0.7;
+        line-height: 1.4;
+    }
+</style>
+
+@code {
+
+    [Parameter] public EntityModel Entity { get; set; } = default!;
+
+    [Parameter] public EventCallback OnClose { get; set; }
+
+    List<string> history = new();
+    EntityModel Current => history.Count > 0 ? EntityModel.Get(history[^1]) : Entity;
+
+    protected override void OnInitialized()
+    {
+        base.OnInitialized();
+        if (Entity != null)
+        {
+            history.Add(Entity.DataType);
+        }
+    }
+
+    async Task Close()
+    {
+        await OnClose.InvokeAsync();
+    }
+
+    void NavigateTo(string entityId)
+    {
+        if (EntityData.Get().ContainsKey(entityId))
+        {
+            history.Add(entityId);
+            StateHasChanged();
+        }
+    }
+
+    void GoBack()
+    {
+        if (history.Count > 1)
+        {
+            history.RemoveAt(history.Count - 1);
+            StateHasChanged();
+        }
+    }
+
+}