feat: add Ford VP44 unlock progress dialog, K-Line fast unlock, localization, safety dialogs, and settings

Unlock progress UI:
- UnlockProgressDialog with dark-themed progress ring, phase indicator, elapsed
  time, and cancel/close buttons (non-modal, draggable borderless window)
- UnlockProgressViewModel with event-driven progress tracking via IUnlockService
- Triggers on pump selection (manual or K-Line auto-detect), not test start

UnlockService rewrite:
- Persistent CAN senders that outlive the unlock sequence (StopSenders on pump change)
- Concurrent K-Line fast unlock: awaits session Connected, sends RAM timer shortcut
  ({02 88 02 03 A8 01 00}), verifies via CAN TestUnlock before skipping wait
- Fix Type 1 verification (Value == 0 means unlocked, was inverted)

K-Line fast unlock support:
- IKwpService.TryFastUnlockAsync / KwpService implementation

Additional features:
- ILocalizationService with ES/EN resource dictionaries and runtime switching
- Safety dialogs: VoltageWarning, OilPumpConfirm, RpmSafetyWarning
- SettingsDialog for app configuration
- BenchService enhancements, ConfigurationService improvements, PDF report updates
- All UI strings localized via DynamicResource

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

Services/ILocalizationService.cs

@@ -0,0 +1,39 @@
+using System;
+
+namespace HC_APTBS.Services
+{
+    /// <summary>
+    /// Provides runtime language switching and localised string retrieval.
+    /// </summary>
+    /// <remarks>
+    /// XAML bindings use <c>{DynamicResource Key}</c> which update automatically
+    /// when the merged <see cref="System.Windows.ResourceDictionary"/> is swapped.
+    /// C# code uses <see cref="GetString"/> for the same keys.
+    /// </remarks>
+    public interface ILocalizationService
+    {
+        /// <summary>Current language code — <c>"ESP"</c> or <c>"ENG"</c>.</summary>
+        string CurrentLanguage { get; }
+
+        /// <summary>
+        /// Switches the active UI language by swapping the merged resource dictionary
+        /// and persisting the choice to <c>config.xml</c>.
+        /// Must be called from the UI thread.
+        /// </summary>
+        /// <param name="languageCode"><c>"ESP"</c> for Spanish or <c>"ENG"</c> for English.</param>
+        void SetLanguage(string languageCode);
+
+        /// <summary>
+        /// Retrieves a localised string by resource key.
+        /// Returns the key itself when no matching resource is found (fail-visible).
+        /// </summary>
+        /// <param name="key">Resource key defined in <c>Resources/Strings.*.xaml</c>.</param>
+        string GetString(string key);
+
+        /// <summary>
+        /// Raised after the active language dictionary has been swapped.
+        /// ViewModels subscribe to refresh any cached localised strings.
+        /// </summary>
+        event Action? LanguageChanged;
+    }
+}