Add independent Pin to Dock feature and fix Save Logs to Desktop (#153)

Resolves the two problems reported in issue #142:

- Dock pinning is now its own feature, decoupled from Favorites. Adds a
  DockPinsManager store, Pin to Dock / Unpin from Dock commands on each
  location, a Docked tag, and repoints GetDockBands() at the dock-pin
  store. Existing favorites are migrated into dock pins once so current
  users keep their dock content.
- Save Logs to Desktop now works. RollingFileLogger writes to a writable
  LocalApplicationData path instead of the read-only install directory,
  and SaveLogsCommand always produces a zip and shows a confirmation toast.

Adds DockPinsManager tests, updates existing test callers and the README.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: michaeljolley

README.md

@@ -19,8 +19,9 @@ forecasts right from your desktop.
   precipitation chance, and conditions
 - **3-Day Forecast** — Quick glance at upcoming weather with highs, lows, and
   conditions
-- **Dock Bands** — Pin your favorite locations to the Command Palette dock for
-  at-a-glance weather cards
+- **Dock Bands** — Pin a location to the Command Palette dock with the "Pin to
+  Dock" command for an at-a-glance weather card. Dock pinning is independent
+  from Favorites, so you can favorite a location, dock it, or both.
 - **Postal Code Search** — Search by postal/ZIP code or city name
 - **Configurable Units** — Fahrenheit/Celsius, mph/km/h, and adjustable update
   intervals

WeatherExtension.Tests/CommandInvocationTests.cs

@@ -18,19 +18,21 @@ public class CommandInvocationTests
 {
 	private string _settingsPath = string.Empty;
 	private string _favoritesPath = string.Empty;
+	private string _dockPinsPath = string.Empty;
 
 
 	[TestInitialize]
 	public void Setup()
 	{
 		_settingsPath = Path.Combine(Path.GetTempPath(), $"weather-cmd-settings-{Guid.NewGuid()}.json");
 		_favoritesPath = Path.Combine(Path.GetTempPath(), $"weather-cmd-fav-{Guid.NewGuid()}.json");
+		_dockPinsPath = Path.Combine(Path.GetTempPath(), $"weather-cmd-dock-{Guid.NewGuid()}.json");
 	}
 
 	[TestCleanup]
 	public void Cleanup()
 	{
-		foreach (var path in new[] { _settingsPath, _favoritesPath })
+		foreach (var path in new[] { _settingsPath, _favoritesPath, _dockPinsPath })
 		{
 			if (File.Exists(path))
 			{
@@ -112,8 +114,8 @@ private WeatherListPage CreateListPage()
 			new StubWeatherService(),
 			new StubGeocodingService(),
 			new WeatherSettingsManager(_settingsPath),
-			
-			new FavoritesManager(_favoritesPath));
+			new FavoritesManager(_favoritesPath),
+			new DockPinsManager(_dockPinsPath));
 	}
 
 }