Add settings, cloud places, and optional archive-content indexing.

Keep official clients in charge of sync while Explorer can group locations, persist UI prefs, and list zip/rar/7z members without extracting them.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/Explorer.Application.Tests/SourceManagerTests.cs

@@ -90,6 +90,68 @@ public class SourceManagerTests
         var found = await mgr.FindByPathAsync(@"Z:\");
         Assert.Equal(source.Id, found!.Id);
     }
+
+    [Fact]
+    public async Task Forget_removes_disconnected_source_and_index_rows()
+    {
+        var db = Path.Combine(Path.GetTempPath(), "ew-app", Guid.NewGuid().ToString("N"), "index.db");
+        await using var store = new SqliteIndexStore(db, NullLogger<SqliteIndexStore>.Instance);
+        await store.OpenAsync();
+        var volumes = new FakeVolumes
+        {
+            Online =
+            [
+                new VolumeFingerprint
+                {
+                    Kind = SourceKind.Smb,
+                    RootPath = @"Z:\",
+                    DisplayName = "Z: (Network)",
+                    Filesystem = "SMB"
+                }
+            ]
+        };
+        var env = new FakeEnv(Path.GetDirectoryName(db)!);
+        var mgr = new SourceManager(store, volumes, env, new SystemClock(), NullLogger<SourceManager>.Instance);
+        await mgr.InitializeAsync();
+        var source = (await store.Sources.GetAllAsync()).Single();
+        await store.Entries.UpsertAsync(new IndexEntry
+        {
+            SourceId = source.Id,
+            Name = "Photos",
+            NameNorm = "photos",
+            IsDirectory = true,
+            PathRel = "Photos",
+            LastSeenUtc = DateTimeOffset.UtcNow
+        });
+
+        Assert.False(mgr.CanForget(source));
+        Assert.False(await mgr.ForgetDisconnectedAsync(@"Z:\"));
+
+        volumes.Online = [];
+        await mgr.RefreshOnlineStateAsync();
+        source = (await store.Sources.GetAllAsync()).Single();
+        Assert.True(mgr.CanForget(source));
+        Assert.True(await mgr.ForgetDisconnectedAsync(@"Z:\"));
+        Assert.Empty(await store.Sources.GetAllAsync());
+        Assert.Null(await store.Entries.GetRootAsync(source.Id));
+    }
+
+    [Fact]
+    public async Task Forget_removes_unc_from_recents()
+    {
+        var dir = Path.Combine(Path.GetTempPath(), "ew-app", Guid.NewGuid().ToString("N"));
+        var db = Path.Combine(dir, "index.db");
+        await using var store = new SqliteIndexStore(db, NullLogger<SqliteIndexStore>.Instance);
+        var volumes = new FakeVolumes();
+        var env = new FakeEnv(dir);
+        File.WriteAllLines(Path.Combine(dir, "recents.txt"), [@"\\old-server\share"]);
+        var mgr = new SourceManager(store, volumes, env, new SystemClock(), NullLogger<SourceManager>.Instance);
+        await mgr.InitializeAsync();
+        Assert.Single(await store.Sources.GetAllAsync());
+        Assert.True(await mgr.ForgetDisconnectedAsync(@"\\old-server\share"));
+        Assert.Empty(await store.Sources.GetAllAsync());
+        Assert.Empty(File.ReadAllLines(Path.Combine(dir, "recents.txt")));
+    }
 }
 
 file sealed class FakeVolumes : IVolumeService