feat(settings): forward-test (paper-trading) settings section

Surfaces the PaperTradingWorker's config on the Settings page — Enabled toggle,
min-score, flat-stake, and poll interval — so forward-testing can be switched on
and tuned from the UI instead of hand-editing committed appsettings.json.

Uses the established UI-mirror-options pattern (PaperTradingSettingsForm bound to
the "PaperTrading" section, same as the UI WorkerOptions mirror) and writes through
the existing ISettingsWriter to appsettings.Local.json. Notifications is deliberately
NOT surfaced: its section holds the Telegram secret and the section-replace writer
would clobber the token — that section stays Local.json-only by design.

- PaperTradingSettingsForm (no secrets) + DI binding; Settings section + en/ru resx.

src/Marathon.UI/Pages/Settings.razor

@@ -6,6 +6,7 @@
 @inject IOptionsMonitor<WorkerOptions> WorkerOpts
 @inject IOptionsMonitor<StorageOptions> StorageOpts
 @inject IOptionsMonitor<AnomalyOptions> AnomalyOpts
+@inject IOptionsMonitor<PaperTradingSettingsForm> PaperTradingOpts
 @inject IOptionsMonitor<Marathon.UI.Services.LocalizationOptions> LocaleOpts
 @inject ISettingsWriter Writer
 @inject IDialogService Dialogs
@@ -157,6 +158,33 @@
         </div>
     </article>
 
+    @* FORWARD-TEST (PAPER TRADING) *@
+    <article class="m-section m-rise m-rise-5">
+        <header class="m-section__head">
+            <h2>@L["Settings.Section.PaperTrading"]</h2>
+            <MudButton Variant="Variant.Text" Size="Size.Small"
+                       OnClick="@(() => ResetSectionAsync(PaperTradingSettingsForm.SectionName))">
+                @L["Settings.Action.Reset"]
+            </MudButton>
+        </header>
+        <div class="m-section__body">
+            <Field Label="@L["Settings.PaperTrading.Enabled"]" Hint="@L["Settings.PaperTrading.Enabled.Hint"]">
+                <MudSwitch T="bool" @bind-Value="_paperTrading.Enabled" Color="Color.Primary" />
+            </Field>
+            <Field Label="@L["Settings.PaperTrading.MinScore"]" Hint="@L["Settings.PaperTrading.MinScore.Hint"]">
+                <MudNumericField T="decimal" @bind-Value="_paperTrading.MinScore" Min="0m" Max="1m" Step="0.05m" Variant="Variant.Outlined" />
+            </Field>
+            <Field Label="@L["Settings.PaperTrading.FlatStake"]" Hint="@L["Settings.PaperTrading.FlatStake.Hint"]">
+                <MudNumericField T="decimal" @bind-Value="_paperTrading.FlatStake" Min="0.01m" Step="5m" Variant="Variant.Outlined" />
+            </Field>
+            <Field Label="@L["Settings.PaperTrading.PollIntervalSeconds"]">
+                <MudNumericField T="int" @bind-Value="_paperTrading.PollIntervalSeconds" Min="5" Max="3600" Variant="Variant.Outlined" />
+            </Field>
+
+            <SectionFooter OnSave="@(() => SaveSectionAsync(PaperTradingSettingsForm.SectionName, _paperTrading))" />
+        </div>
+    </article>
+
     @* LOCALIZATION *@
     <article class="m-section m-rise m-rise-5">
         <header class="m-section__head">
@@ -184,6 +212,7 @@
     private WorkerOptions _workers = new();
     private StorageOptions _storage = new();
     private AnomalyOptions _anomaly = new();
+    private PaperTradingSettingsForm _paperTrading = new();
     private LocalizationOptions _locale = new();
     private string _userAgentsRaw = string.Empty;
 
@@ -218,6 +247,14 @@
             DetectionIntervalSeconds = AnomalyOpts.CurrentValue.DetectionIntervalSeconds,
         };
 
+        _paperTrading = new PaperTradingSettingsForm
+        {
+            Enabled = PaperTradingOpts.CurrentValue.Enabled,
+            MinScore = PaperTradingOpts.CurrentValue.MinScore,
+            FlatStake = PaperTradingOpts.CurrentValue.FlatStake,
+            PollIntervalSeconds = PaperTradingOpts.CurrentValue.PollIntervalSeconds,
+        };
+
         _locale = new LocalizationOptions { DefaultCulture = LocaleOpts.CurrentValue.DefaultCulture };
     }
 

src/Marathon.UI/Resources/SharedResource.en.resx

@@ -97,6 +97,14 @@
   <data name="Settings.Section.Workers"><value>Background workers</value></data>
   <data name="Settings.Section.Storage"><value>Storage</value></data>
   <data name="Settings.Section.Anomaly"><value>Anomaly detector</value></data>
+  <data name="Settings.Section.PaperTrading"><value>Forward-test (paper trading)</value></data>
+  <data name="Settings.PaperTrading.Enabled"><value>Enable forward-test worker</value></data>
+  <data name="Settings.PaperTrading.Enabled.Hint"><value>Opens a flat-stake paper bet on each live directional signal and settles it when the result lands.</value></data>
+  <data name="Settings.PaperTrading.MinScore"><value>Min score</value></data>
+  <data name="Settings.PaperTrading.MinScore.Hint"><value>Only anomalies at or above this score are paper-traded.</value></data>
+  <data name="Settings.PaperTrading.FlatStake"><value>Flat stake</value></data>
+  <data name="Settings.PaperTrading.FlatStake.Hint"><value>Stake placed on every paper bet.</value></data>
+  <data name="Settings.PaperTrading.PollIntervalSeconds"><value>Poll interval (sec)</value></data>
   <data name="Settings.Section.Localization"><value>Localization</value></data>
   <data name="Settings.Action.Reset"><value>Reset section</value></data>
   <data name="Settings.Action.Save"><value>Save</value></data>

src/Marathon.UI/Resources/SharedResource.ru.resx

@@ -101,6 +101,14 @@
   <data name="Settings.Section.Workers"><value>Фоновые задачи</value></data>
   <data name="Settings.Section.Storage"><value>Хранилище</value></data>
   <data name="Settings.Section.Anomaly"><value>Детектор аномалий</value></data>
+  <data name="Settings.Section.PaperTrading"><value>Форвард-тест (бумажная торговля)</value></data>
+  <data name="Settings.PaperTrading.Enabled"><value>Включить воркер форвард-теста</value></data>
+  <data name="Settings.PaperTrading.Enabled.Hint"><value>Открывает ставку фиксированным стейком на каждый живой направленный сигнал и рассчитывает её по результату.</value></data>
+  <data name="Settings.PaperTrading.MinScore"><value>Мин. score</value></data>
+  <data name="Settings.PaperTrading.MinScore.Hint"><value>В форвард-тест попадают только аномалии со score не ниже указанного.</value></data>
+  <data name="Settings.PaperTrading.FlatStake"><value>Фикс. стейк</value></data>
+  <data name="Settings.PaperTrading.FlatStake.Hint"><value>Стейк на каждую бумажную ставку.</value></data>
+  <data name="Settings.PaperTrading.PollIntervalSeconds"><value>Интервал опроса (сек)</value></data>
   <data name="Settings.Section.Localization"><value>Локализация</value></data>
   <data name="Settings.Action.Reset"><value>Сбросить раздел</value></data>
   <data name="Settings.Action.Save"><value>Сохранить</value></data>

src/Marathon.UI/Services/PaperTradingSettingsForm.cs

@@ -0,0 +1,24 @@
+namespace Marathon.UI.Services;
+
+/// <summary>
+/// Mutable UI mirror of the host's paper-trading options, bound to the same
+/// <c>PaperTrading</c> config section so the Settings page can edit the forward-test
+/// worker's behaviour. Mirrors <c>Marathon.Infrastructure.Configuration.PaperTradingOptions</c>
+/// (which the worker reads); keep the two in sync. Contains no secrets.
+/// </summary>
+public sealed class PaperTradingSettingsForm
+{
+    public const string SectionName = "PaperTrading";
+
+    /// <summary>Master switch — when false the worker idles.</summary>
+    public bool Enabled { get; set; }
+
+    /// <summary>Minimum anomaly score required to open a paper bet.</summary>
+    public decimal MinScore { get; set; } = 0.55m;
+
+    /// <summary>Flat stake placed on every paper bet.</summary>
+    public decimal FlatStake { get; set; } = 10m;
+
+    /// <summary>Seconds between open/settle cycles.</summary>
+    public int PollIntervalSeconds { get; set; } = 60;
+}

src/Marathon.UI/Services/UiServicesExtensions.cs

@@ -47,6 +47,7 @@ public static class UiServicesExtensions
         services.Configure<AnomalyOptions>(configuration.GetSection(AnomalyOptions.SectionName));
         services.Configure<StorageOptions>(configuration.GetSection(StorageOptions.SectionName));
         services.Configure<ScrapingSettingsForm>(configuration.GetSection(ScrapingSettingsForm.SectionName));
+        services.Configure<PaperTradingSettingsForm>(configuration.GetSection(PaperTradingSettingsForm.SectionName));
 
         // Singletons that drive UI chrome state.
         services.AddSingleton<ThemeState>();