feat: page-based navigation shell + Tests page wizard

Replace the monolithic MainWindow with a SelectedPage-driven shell
(Dashboard / Pump / Bench / Tests / Results / Settings). The Tests
page gets the Plan -> Preconditions -> Running -> Done wizard from
ui-structure.md \u00a74, backed by a 7-item precondition gate and
shared sub-views (PhaseCardView / TestSectionView / GraphicIndicatorView)
extracted from the now-deleted monolithic TestPanelView.

New VMs / views:
- Tests wizard: TestPreconditions, PhaseCard, GraphicIndicator,
  TestSection, TestPlan, TestRunning, TestDone
- Dashboard panels: DashboardConnection, DashboardReadings,
  DashboardAlarms, InterlockBanner, ResultHistory
- Pump / bench panels: PumpIdentificationPanel, PumpLiveData,
  UnlockPanel, BenchDriveControl, BenchReadings, RelayBank,
  TemperatureControl, DtcList, AuthGate
- Dialogs: generic ConfirmDialog, UserManageDialog, UserPromptDialog

Supporting changes:
- IsOilPumpOn exposed on MainViewModel for precondition evaluation
- RequiresAuth added to TestDefinition (XML round-trip)
- BipStatusDefinition + CompletedTestRun models
- ~35 new Test.* localization keys (en + es)
- Settings moved from modal dialog to full page
- Pause / Retry / Skip stubs in TestRunningView; full spec in
  docs/gap-test-running-controls.md for follow-up implementation
- docs/ui-structure.md captures the wizard design

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Resources/Styles.xaml

@@ -0,0 +1,52 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <!-- Boolean → Visibility converter (shared across views) -->
+    <BooleanToVisibilityConverter x:Key="BoolToVis"/>
+
+    <!-- LCD blue gradient border -->
+    <Style x:Key="LcdBlue" TargetType="Border">
+        <Setter Property="BorderBrush" Value="Black"/>
+        <Setter Property="BorderThickness" Value="4"/>
+        <Setter Property="SnapsToDevicePixels" Value="True"/>
+        <Setter Property="Background">
+            <Setter.Value>
+                <LinearGradientBrush StartPoint="0.3,0" EndPoint="0.5,1.3">
+                    <GradientStop Color="#0040ff" Offset="0"/>
+                    <GradientStop Color="#0031c2" Offset="1"/>
+                </LinearGradientBrush>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <!-- LCD amber gradient border -->
+    <Style x:Key="LcdAmber" TargetType="Border">
+        <Setter Property="BorderBrush" Value="Black"/>
+        <Setter Property="BorderThickness" Value="3"/>
+        <Setter Property="SnapsToDevicePixels" Value="True"/>
+        <Setter Property="Background">
+            <Setter.Value>
+                <LinearGradientBrush StartPoint="0.3,0" EndPoint="0.5,1.3">
+                    <GradientStop Color="#ffae00" Offset="0"/>
+                    <GradientStop Color="#91670a" Offset="2"/>
+                </LinearGradientBrush>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <!-- Connection indicator style (green/gray) -->
+    <Style x:Key="ConnIndicator" TargetType="Border">
+        <Setter Property="Background" Value="Gray"/>
+        <Setter Property="BorderBrush" Value="Black"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="Margin" Value="2,4"/>
+    </Style>
+
+    <!-- Relay toggle button style -->
+    <Style x:Key="RelayButton" TargetType="Button">
+        <Setter Property="Padding" Value="6,3"/>
+        <Setter Property="Margin" Value="3,2"/>
+        <Setter Property="FontSize" Value="11"/>
+    </Style>
+
+</ResourceDictionary>