diff --git a/Endpoints/AdminEndpoints.cs b/Endpoints/AdminEndpoints.cs
index 086e3a0..96bbe31 100644
--- a/Endpoints/AdminEndpoints.cs
+++ b/Endpoints/AdminEndpoints.cs
@@ -191,7 +191,7 @@ public static class AdminEndpoints
             var suggestions = await db.Suggestions.ToListAsync();
             var target = suggestions.FirstOrDefault(s => s.Id == request.SuggestionId);
             if (target is null)
-                return Results.NotFound(new { error = "Suggestion not found." });
+                return Results.Ok(new { UnlinkedSuggestionIds = Array.Empty<int>(), UnfinalizedPlayers = 0 });
 
             var rootIndex = EndpointHelpers.BuildLinkRoots(suggestions.Select(s => (s.Id, s.ParentSuggestionId)));
             if (!rootIndex.TryGetValue(target.Id, out var rootId))
diff --git a/Endpoints/AuthEndpoints.cs b/Endpoints/AuthEndpoints.cs
index 4f94097..06c3c1c 100644
--- a/Endpoints/AuthEndpoints.cs
+++ b/Endpoints/AuthEndpoints.cs
@@ -22,6 +22,9 @@ public static class AuthEndpoints
             if (string.IsNullOrWhiteSpace(request.Password))
                 return Results.BadRequest(new { error = "Password is required." });
 
+            if (request.DisplayName?.Trim().Length > 16)
+                return Results.BadRequest(new { error = "Display name must be <= 16 characters." });
+
             var displayName = EndpointHelpers.TrimTo(request.DisplayName, 16);
             if (string.IsNullOrWhiteSpace(displayName))
                 return Results.BadRequest(new { error = "Display name is required." });
diff --git a/Endpoints/EndpointHelpers.cs b/Endpoints/EndpointHelpers.cs
index d15c13e..6862ead 100644
--- a/Endpoints/EndpointHelpers.cs
+++ b/Endpoints/EndpointHelpers.cs
@@ -91,7 +91,7 @@ internal static class EndpointHelpers
                || path.EndsWith(".gif") || path.EndsWith(".webp") || path.EndsWith(".avif");
     }
 
-    public static async Task<bool> IsReachableImageAsync(string? url, IHttpClientFactory httpFactory, CancellationToken ct = default)
+    public static async Task<bool> IsReachableImageAsync(string? url, IHttpClientFactory httpFactory, HttpMessageHandler? handler = null, CancellationToken ct = default)
     {
         if (string.IsNullOrWhiteSpace(url)) return true;
         if (!Uri.TryCreate(url, UriKind.Absolute, out var uri)) return false;
@@ -101,11 +101,9 @@ internal static class EndpointHelpers
         using var cts = CancellationTokenSource.CreateLinkedTokenSource(ct);
         cts.CancelAfter(TimeSpan.FromSeconds(3));
 
-        var handler = new HttpClientHandler
-        {
-            AllowAutoRedirect = false
-        };
-        var client = new HttpClient(handler);
+        var client = handler is null
+            ? httpFactory.CreateClient("imageValidation")
+            : new HttpClient(handler, disposeHandler: false);
 
         try
         {
@@ -113,10 +111,10 @@ internal static class EndpointHelpers
             var headResp = await client.SendAsync(head, HttpCompletionOption.ResponseHeadersRead, cts.Token);
             if (headResp.IsSuccessStatusCode && headResp.StatusCode is not System.Net.HttpStatusCode.Redirect)
             {
+                if (headResp.Content.Headers.ContentLength is long headLen && headLen > MaxImageBytes) return false;
                 var ctHeader = headResp.Content.Headers.ContentType?.MediaType;
                 if (!string.IsNullOrWhiteSpace(ctHeader) && ctHeader.StartsWith("image/", StringComparison.OrdinalIgnoreCase))
                     return true;
-                if (headResp.Content.Headers.ContentLength is long len && len > MaxImageBytes) return false;
             }
         }
         catch { /* fallback */ }
diff --git a/Endpoints/StateEndpoints.cs b/Endpoints/StateEndpoints.cs
index a3c2ead..34121db 100644
--- a/Endpoints/StateEndpoints.cs
+++ b/Endpoints/StateEndpoints.cs
@@ -80,6 +80,11 @@ public static class StateEndpoints
 
         group.MapPost("/me/name", async ([FromBody] SetNameRequest request, HttpContext ctx, AppDbContext db) =>
         {
+            if (request.Name?.Trim().Length > 16)
+            {
+                return Results.BadRequest(new { error = "Name is required and must be <= 16 characters." });
+            }
+
             var name = EndpointHelpers.TrimTo(request.Name, 16);
             if (string.IsNullOrWhiteSpace(name))
             {
diff --git a/Endpoints/SuggestEndpoints.cs b/Endpoints/SuggestEndpoints.cs
index f9c30dc..7b401b3 100644
--- a/Endpoints/SuggestEndpoints.cs
+++ b/Endpoints/SuggestEndpoints.cs
@@ -116,6 +116,13 @@ public static class SuggestEndpoints
             if (player is null) return Results.Unauthorized();
             var isAdmin = await EndpointHelpers.IsAdmin(ctx, db);
 
+            if (!isAdmin)
+            {
+                var phase = await EndpointHelpers.GetPhase(db, player.Id);
+                if (phase != Phase.Suggest)
+                    return EndpointHelpers.PhaseMismatch(Phase.Suggest, phase);
+            }
+
             var suggestion = isAdmin
                 ? await db.Suggestions.FirstOrDefaultAsync(s => s.Id == id)
                 : await db.Suggestions.FirstOrDefaultAsync(s => s.Id == id && s.PlayerId == player.Id);
diff --git a/GameList.Tests/AdminTests.cs b/GameList.Tests/AdminTests.cs
index f4d67a9..757a247 100644
--- a/GameList.Tests/AdminTests.cs
+++ b/GameList.Tests/AdminTests.cs
@@ -3,6 +3,7 @@ using System.Net.Http.Json;
 using System.Text.Json;
 using GameList.Domain;
 using GameList.Tests.Support;
+using Microsoft.EntityFrameworkCore;
 
 namespace GameList.Tests;
 
@@ -156,4 +157,171 @@ public class AdminTests
             Assert.Single(db.AppState);
         });
     }
+
+    [Fact]
+    public async Task Admin_results_closing_moves_back_to_vote_and_clears_finalize()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        var player = factory.CreateClientWithCookies();
+        await player.RegisterAsync("player");
+
+        var open = await admin.PostAsJsonAsync("/api/admin/results", new { resultsOpen = true });
+        open.EnsureSuccessStatusCode();
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var p = await db.Players.FirstAsync(x => !x.IsAdmin);
+            p.VotesFinal = true;
+            await db.SaveChangesAsync();
+        });
+
+        var beforeState = await factory.WithDbContextAsync(async db => await db.AppState.AsNoTracking().FirstAsync());
+        await Task.Delay(5);
+        var close = await admin.PostAsJsonAsync("/api/admin/results", new { resultsOpen = false });
+        close.EnsureSuccessStatusCode();
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var p = await db.Players.FirstAsync(x => !x.IsAdmin);
+            Assert.Equal(Phase.Vote, p.CurrentPhase);
+            Assert.False(p.VotesFinal);
+            var state = await db.AppState.AsNoTracking().FirstAsync();
+            Assert.False(state.ResultsOpen);
+            Assert.True(state.UpdatedAt > beforeState.UpdatedAt);
+        });
+    }
+
+    [Fact]
+    public async Task Vote_status_lists_waiting_players()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        await admin.PostAsJsonAsync("/api/me/phase/next", new { });
+
+        var p1 = factory.CreateClientWithCookies();
+        await p1.RegisterAsync("alice");
+        var p2 = factory.CreateClientWithCookies();
+        await p2.RegisterAsync("bob");
+        var s = await p1.CreateSuggestionAsync("Game");
+        await p1.PostAsJsonAsync("/api/me/phase/next", new { });
+        await p2.PostAsJsonAsync("/api/me/phase/next", new { });
+        await p1.PostAsJsonAsync("/api/votes", new { SuggestionId = s, Score = 5 });
+        await p1.PostAsJsonAsync("/api/votes/finalize", new { Final = true });
+
+        var status = await admin.GetFromJsonAsync<JsonElement>("/api/admin/vote-status");
+        Assert.False(status.GetProperty("ready").GetBoolean());
+        var waiting = status.GetProperty("waiting").EnumerateArray().Select(e => e.GetString()).ToList();
+        Assert.Contains("bob-name", waiting);
+    }
+
+    [Fact]
+    public async Task Grant_joker_in_vote_sets_flag_and_unfinalizes()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+
+        var p = factory.CreateClientWithCookies();
+        await p.RegisterAsync("player");
+        await p.PostAsJsonAsync("/api/me/phase/next", new { });
+        await p.PostAsJsonAsync("/api/votes/finalize", new { Final = true });
+
+        var give = await admin.PostAsJsonAsync("/api/admin/joker", new { playerId = (await p.GetProfileIdAsync()) });
+        give.EnsureSuccessStatusCode();
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.SingleAsync(x => x.Username == "player");
+            Assert.True(player.HasJoker);
+            Assert.False(player.VotesFinal);
+        });
+    }
+
+    [Fact]
+    public async Task Link_requires_vote_phase_and_reparents_votes_reset()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        var player = factory.CreateClientWithCookies();
+        await player.RegisterAsync("linker");
+
+        var a = await player.CreateSuggestionAsync("A");
+        var b = await player.CreateSuggestionAsync("B");
+
+        var beforeVotePhase = await admin.PostAsJsonAsync("/api/admin/link-suggestions", new { SourceSuggestionId = a, TargetSuggestionId = b });
+        Assert.Equal(HttpStatusCode.BadRequest, beforeVotePhase.StatusCode);
+
+        await admin.PostAsJsonAsync("/api/me/phase/next", new { });
+        await player.PostAsJsonAsync("/api/me/phase/next", new { });
+
+        await player.PostAsJsonAsync("/api/votes", new { SuggestionId = a, Score = 3 });
+        await player.PostAsJsonAsync("/api/votes/finalize", new { Final = true });
+
+        var link = await admin.PostAsJsonAsync("/api/admin/link-suggestions", new { SourceSuggestionId = a, TargetSuggestionId = b });
+        link.EnsureSuccessStatusCode();
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var votes = await db.Votes.ToListAsync();
+            Assert.Empty(votes);
+            var p = await db.Players.SingleAsync(x => x.Username == "linker");
+            Assert.False(p.VotesFinal);
+        });
+    }
+
+    [Fact]
+    public async Task Unlink_not_found_returns_empty_payload()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        await admin.PostAsJsonAsync("/api/me/phase/next", new { });
+
+        var resp = await admin.PostAsJsonAsync("/api/admin/unlink-suggestions", new { suggestionId = 9999 });
+        resp.EnsureSuccessStatusCode();
+        var json = await resp.Content.ReadFromJsonAsync<JsonElement>();
+        Assert.Equal(0, json.GetProperty("unlinkedSuggestionIds").GetArrayLength());
+    }
+
+    [Fact]
+    public async Task Reset_clears_flags_and_factory_reset_seeds_defaults()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        var p = factory.CreateClientWithCookies();
+        await p.RegisterAsync("flags");
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.SingleAsync(x => x.Username == "flags");
+            player.HasJoker = true;
+            player.VotesFinal = true;
+            await db.SaveChangesAsync();
+        });
+
+        var reset = await admin.PostAsJsonAsync("/api/admin/reset", new { });
+        reset.EnsureSuccessStatusCode();
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.SingleAsync(x => x.Username == "flags");
+            Assert.False(player.HasJoker);
+            Assert.False(player.VotesFinal);
+            var state = await db.AppState.AsNoTracking().FirstAsync();
+            Assert.False(state.ResultsOpen);
+        });
+
+        var factoryReset = await admin.PostAsJsonAsync("/api/admin/factory-reset", new { });
+        factoryReset.EnsureSuccessStatusCode();
+        await factory.WithDbContextAsync(async db =>
+        {
+            var state = await db.AppState.AsNoTracking().FirstAsync();
+            Assert.False(state.ResultsOpen);
+        });
+    }
 }
diff --git a/GameList.Tests/AuthTests.cs b/GameList.Tests/AuthTests.cs
index 816e3c2..bf64113 100644
--- a/GameList.Tests/AuthTests.cs
+++ b/GameList.Tests/AuthTests.cs
@@ -1,12 +1,95 @@
 using System.Net;
 using System.Net.Http.Json;
 using System.Text.Json;
+using GameList.Data;
+using GameList.Infrastructure;
 using GameList.Tests.Support;
+using Microsoft.EntityFrameworkCore;
 
 namespace GameList.Tests;
 
 public class AuthTests
 {
+    [Fact]
+    public async Task Register_trims_limits_and_sets_cookie_and_normalized_username()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+
+        var response = await client.PostAsJsonAsync("/api/auth/register", new
+        {
+            Username = "  MixedCaseUser  ",
+            Password = "Pass123!",
+            DisplayName = "  Display Name  ",
+            AdminKey = (string?)null
+        });
+
+        response.EnsureSuccessStatusCode();
+        Assert.True(response.Headers.TryGetValues("Set-Cookie", out var cookies) &&
+                    cookies.Any(c => c.Contains(PlayerIdentityExtensions.PlayerCookieName)));
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.AsNoTracking().SingleAsync(p => p.Username == "MixedCaseUser");
+            Assert.Equal("mixedcaseuser", player.NormalizedUsername);
+            Assert.True(player.DisplayName!.Length <= 16);
+            Assert.NotEqual(Array.Empty<byte>(), player.PasswordHash);
+            Assert.NotEqual(Array.Empty<byte>(), player.PasswordSalt);
+        });
+    }
+
+    [Fact]
+    public async Task Register_rejects_overlength_username_or_display_name()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+
+        var tooLongUser = new string('u', 25);
+        var userResp = await client.PostAsJsonAsync("/api/auth/register", new
+        {
+            Username = tooLongUser,
+            Password = "Pass123!",
+            DisplayName = "short"
+        });
+        Assert.Equal(HttpStatusCode.BadRequest, userResp.StatusCode);
+
+        var longDisplay = new string('d', 17);
+        var displayResp = await client.PostAsJsonAsync("/api/auth/register", new
+        {
+            Username = "okuser",
+            Password = "Pass123!",
+            DisplayName = longDisplay
+        });
+
+        Assert.Equal(HttpStatusCode.BadRequest, displayResp.StatusCode);
+    }
+
+    [Fact]
+    public async Task Login_sets_last_login_and_fills_missing_display_name()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("loginfill");
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.FirstAsync();
+            player.DisplayName = null;
+            player.LastLoginAt = DateTimeOffset.UnixEpoch;
+            await db.SaveChangesAsync();
+        });
+
+        var login = await client.LoginAsync("loginfill", "Pass123!");
+        login.EnsureSuccessStatusCode();
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.AsNoTracking().SingleAsync();
+            Assert.NotEqual(DateTimeOffset.UnixEpoch, player.LastLoginAt);
+            Assert.Equal("loginfill", player.DisplayName);
+        });
+    }
+
     [Fact]
     public async Task Register_with_admin_key_sets_admin_flag()
     {
@@ -60,6 +143,28 @@ public class AuthTests
         Assert.Equal(HttpStatusCode.BadRequest, badKey.StatusCode);
     }
 
+    [Fact]
+    public async Task Non_admin_cannot_access_admin_routes()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var player = factory.CreateClientWithCookies();
+        await player.RegisterAsync("regular");
+
+        var resp = await player.GetAsync("/api/admin/vote-status");
+        Assert.Equal(HttpStatusCode.Unauthorized, resp.StatusCode);
+    }
+
+    [Fact]
+    public async Task Admin_can_access_admin_routes()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("adminuser", admin: true);
+
+        var resp = await admin.GetAsync("/api/admin/vote-status");
+        resp.EnsureSuccessStatusCode();
+    }
+
     [Fact]
     public async Task Logout_clears_cookie()
     {
diff --git a/GameList.Tests/HelperTests.cs b/GameList.Tests/HelperTests.cs
index 78cca41..da68bb1 100644
--- a/GameList.Tests/HelperTests.cs
+++ b/GameList.Tests/HelperTests.cs
@@ -1,13 +1,18 @@
 using System.Net;
+using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Reflection;
 using GameList.Infrastructure;
 using GameList.Endpoints;
 using GameList.Tests.Support;
+using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.FileProviders;
 using System.Linq;
+using Microsoft.AspNetCore.Mvc.Testing;
+using System.Text.Json;
+using System.Net.Http.Json;
 
 namespace GameList.Tests;
 
@@ -62,6 +67,74 @@ public class HelperTests
         Assert.False(await EndpointHelpers.IsReachableImageAsync("http://127.0.0.1/img.png", new StubHttpClientFactory(new StubHttpMessageHandler())));
     }
 
+    [Fact]
+    public async Task IsReachableImageAsync_handles_head_success_redirect_and_size_guard()
+    {
+        var handler = new StubHttpMessageHandler();
+        handler.SetResponder(req =>
+        {
+            if (req.Method == HttpMethod.Head)
+            {
+                var resp = new HttpResponseMessage(HttpStatusCode.OK);
+                resp.Content = new ByteArrayContent(Array.Empty<byte>());
+                resp.Content.Headers.ContentType = new MediaTypeHeaderValue("image/png");
+                resp.Content.Headers.ContentLength = 100;
+                return resp;
+            }
+            return new HttpResponseMessage(HttpStatusCode.OK)
+            {
+                Content = new ByteArrayContent(Array.Empty<byte>())
+                {
+                    Headers =
+                    {
+                        ContentType = new MediaTypeHeaderValue("image/png"),
+                        ContentLength = 100
+                    }
+                }
+            };
+        });
+
+        var ok = await EndpointHelpers.IsReachableImageAsync("http://example.com/img.png", new StubHttpClientFactory(handler), handler);
+        Assert.True(ok);
+
+        handler.SetResponder(_ =>
+        {
+            var resp = new HttpResponseMessage(HttpStatusCode.Redirect);
+            resp.Headers.Location = new Uri("http://example.com/other");
+            return resp;
+        });
+        var redirect = await EndpointHelpers.IsReachableImageAsync("http://example.com/img.png", new StubHttpClientFactory(handler), handler);
+        Assert.False(redirect);
+
+        handler.SetResponder(_ =>
+        {
+            var resp = new HttpResponseMessage(HttpStatusCode.OK);
+            resp.Content = new ByteArrayContent(new byte[10]);
+            resp.Content.Headers.ContentType = new MediaTypeHeaderValue("image/png");
+            resp.Content.Headers.ContentLength = 6 * 1024 * 1024; // over 5 MB
+            return resp;
+        });
+        var tooLarge = await EndpointHelpers.IsReachableImageAsync("http://example.com/img.png", new StubHttpClientFactory(handler), handler);
+        Assert.False(tooLarge);
+    }
+
+    [Fact]
+    public async Task IsReachableImageAsync_rejects_non_image_content()
+    {
+        var handler = new StubHttpMessageHandler();
+        handler.SetResponder(_ =>
+        {
+            var resp = new HttpResponseMessage(HttpStatusCode.OK);
+            resp.Content = new ByteArrayContent(System.Text.Encoding.UTF8.GetBytes("not image"));
+            resp.Content.Headers.ContentType = new MediaTypeHeaderValue("text/plain");
+            resp.Content.Headers.ContentLength = 9;
+            return resp;
+        });
+
+        var result = await EndpointHelpers.IsReachableImageAsync("http://example.com/img.png", new StubHttpClientFactory(handler), handler);
+        Assert.False(result);
+    }
+
     [Fact]
     public void Link_root_helpers_handle_groups()
     {
@@ -98,6 +171,29 @@ public class HelperTests
         Assert.Equal(3, root); // cycle breaks on revisit
     }
 
+    [Fact]
+    public async Task Global_exception_handler_returns_json_error()
+    {
+        using var factory = new TestWebApplicationFactory().WithWebHostBuilder(builder =>
+        {
+            builder.Configure(app =>
+            {
+                app.UseGlobalExceptionLogging();
+                app.UseRouting();
+                app.UseEndpoints(endpoints =>
+                {
+                    endpoints.MapGet("/boom", _ => throw new InvalidOperationException("boom"));
+                });
+            });
+        });
+
+        var client = factory.CreateClient();
+        var resp = await client.GetAsync("/boom");
+        Assert.Equal(HttpStatusCode.InternalServerError, resp.StatusCode);
+        var json = await resp.Content.ReadFromJsonAsync<JsonElement>();
+        Assert.Equal("Unexpected server error", json.GetProperty("error").GetString());
+    }
+
     private class FakeEnv : IWebHostEnvironment
     {
         public string ApplicationName { get; set; } = "";
diff --git a/GameList.Tests/ResultsTests.cs b/GameList.Tests/ResultsTests.cs
index 9b8e262..4f563f0 100644
--- a/GameList.Tests/ResultsTests.cs
+++ b/GameList.Tests/ResultsTests.cs
@@ -43,4 +43,50 @@ public class ResultsTests
         var resp = await client.GetAsync("/api/results");
         Assert.Equal(System.Net.HttpStatusCode.BadRequest, resp.StatusCode);
     }
+
+    [Fact]
+    public async Task Results_require_results_phase_and_auth()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        var player = factory.CreateClientWithCookies();
+        await player.RegisterAsync("player");
+        await admin.PostAsJsonAsync("/api/admin/results", new { resultsOpen = true });
+
+        var anon = factory.CreateClient();
+        var unauthorized = await anon.GetAsync("/api/results");
+        Assert.Equal(System.Net.HttpStatusCode.Unauthorized, unauthorized.StatusCode);
+
+        var ok = await player.GetAsync("/api/results");
+        Assert.Equal(System.Net.HttpStatusCode.OK, ok.StatusCode);
+    }
+
+    [Fact]
+    public async Task Results_payload_contains_fields_and_ordering()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+
+        var player = factory.CreateClientWithCookies();
+        await player.RegisterAsync("player");
+        var s1 = await player.CreateSuggestionAsync("High");
+        var s2 = await player.CreateSuggestionAsync("NoVotes");
+
+        await player.PostAsJsonAsync("/api/me/phase/next", new { });
+        await player.PostAsJsonAsync("/api/votes", new { SuggestionId = s1, Score = 9 });
+        await player.PostAsJsonAsync("/api/votes/finalize", new { Final = true });
+
+        await admin.PostAsJsonAsync("/api/admin/results", new { resultsOpen = true });
+        await player.PostAsJsonAsync("/api/me/phase/next", new { });
+
+        var results = await player.GetFromJsonAsync<List<JsonElement>>("/api/results");
+        Assert.NotNull(results);
+        Assert.Equal(2, results!.Count);
+        Assert.Equal("High", results[0].GetProperty("name").GetString());
+        Assert.Equal(9, (int)results[0].GetProperty("average").GetDouble());
+        Assert.Equal(1, results[0].GetProperty("count").GetInt32());
+        Assert.Equal(0, results[1].GetProperty("average").GetDouble());
+    }
 }
diff --git a/GameList.Tests/StateTests.cs b/GameList.Tests/StateTests.cs
index 3c226ed..29cf66a 100644
--- a/GameList.Tests/StateTests.cs
+++ b/GameList.Tests/StateTests.cs
@@ -11,6 +11,142 @@ namespace GameList.Tests;
 
 public class StateTests
 {
+    [Fact]
+    public async Task State_endpoint_returns_expected_payload_for_authenticated_user()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("payload");
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.FirstAsync();
+            player.HasJoker = true;
+            await db.SaveChangesAsync();
+        });
+        await client.CreateSuggestionAsync("One");
+
+        var state = await client.GetFromJsonAsync<JsonElement>("/api/state");
+
+        Assert.Equal(Phase.Suggest.ToString(), state.GetProperty("currentPhase").GetString());
+        Assert.False(state.GetProperty("votesFinal").GetBoolean());
+        Assert.True(state.GetProperty("hasJoker").GetBoolean());
+        Assert.True(state.GetProperty("players").GetInt32() >= 1);
+        Assert.True(state.GetProperty("suggestions").GetInt32() >= 1);
+        Assert.True(state.GetProperty("votes").GetInt32() >= 0);
+    }
+
+    [Fact]
+    public async Task GetPhase_upgrades_reveal_and_resets_when_results_close()
+    {
+        using var factory = new TestWebApplicationFactory();
+        Guid playerId = Guid.Empty;
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = new Player
+            {
+                Id = Guid.NewGuid(),
+                Username = "legacy",
+                NormalizedUsername = "legacy",
+                PasswordHash = new byte[] { 1 },
+                PasswordSalt = new byte[] { 1 },
+                DisplayName = "Legacy",
+                CurrentPhase = Phase.Reveal,
+                VotesFinal = true
+            };
+            playerId = player.Id;
+            db.Players.Add(player);
+            var state = await db.AppState.FirstAsync();
+            state.ResultsOpen = true;
+            await db.SaveChangesAsync();
+        });
+
+        using (var scope = factory.Services.CreateScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+            var phase = await GameList.Endpoints.EndpointHelpers.GetPhase(db, playerId);
+            Assert.Equal(Phase.Results, phase);
+        }
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var state = await db.AppState.FirstAsync();
+            state.ResultsOpen = false;
+            await db.SaveChangesAsync();
+        });
+
+        using (var scope = factory.Services.CreateScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+            var phase = await GameList.Endpoints.EndpointHelpers.GetPhase(db, playerId);
+            var player = await db.Players.FindAsync(playerId);
+            Assert.Equal(Phase.Vote, phase);
+            Assert.False(player!.VotesFinal);
+        }
+    }
+
+    [Fact]
+    public async Task Phase_next_advances_and_clears_votesfinal()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("advance");
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.FirstAsync();
+            player.VotesFinal = true;
+            await db.SaveChangesAsync();
+        });
+
+        var toVote = await client.PostAsJsonAsync("/api/me/phase/next", new { });
+        toVote.EnsureSuccessStatusCode();
+        var toResultsLocked = await client.PostAsJsonAsync("/api/me/phase/next", new { });
+        Assert.Equal(HttpStatusCode.BadRequest, toResultsLocked.StatusCode);
+
+        // unlock results and advance
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        await admin.PostAsJsonAsync("/api/admin/results", new { resultsOpen = true });
+        var toResults = await client.PostAsJsonAsync("/api/me/phase/next", new { });
+        toResults.EnsureSuccessStatusCode();
+        var me = await client.GetFromJsonAsync<JsonElement>("/api/me");
+        Assert.False(me.GetProperty("votesFinal").GetBoolean());
+        Assert.Equal(Phase.Results.ToString(), me.GetProperty("currentPhase").GetString());
+    }
+
+    [Fact]
+    public async Task Phase_prev_moves_back_and_clears_votesfinal()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+
+        await admin.PostAsJsonAsync("/api/me/phase/next", new { }); // Vote
+        await factory.WithDbContextAsync(async db =>
+        {
+            var player = await db.Players.FirstAsync();
+            player.VotesFinal = true;
+            await db.SaveChangesAsync();
+        });
+        var backToSuggest = await admin.PostAsJsonAsync("/api/me/phase/prev", new { });
+        backToSuggest.EnsureSuccessStatusCode();
+
+        var me = await admin.GetFromJsonAsync<JsonElement>("/api/me");
+        Assert.Equal(Phase.Suggest.ToString(), me.GetProperty("currentPhase").GetString());
+        Assert.False(me.GetProperty("votesFinal").GetBoolean());
+    }
+
+    [Fact]
+    public async Task Name_endpoint_rejects_over_16_chars()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("namelimit");
+
+        var resp = await client.PostAsJsonAsync("/api/me/name", new { name = new string('a', 17) });
+        Assert.Equal(HttpStatusCode.BadRequest, resp.StatusCode);
+    }
+
     [Fact]
     public async Task Cannot_advance_to_results_when_locked()
     {
diff --git a/GameList.Tests/SuggestionTests.cs b/GameList.Tests/SuggestionTests.cs
index f1b593c..34f231e 100644
--- a/GameList.Tests/SuggestionTests.cs
+++ b/GameList.Tests/SuggestionTests.cs
@@ -87,12 +87,16 @@ public class SuggestionTests
         using var factory = new TestWebApplicationFactory();
         var player = factory.CreateClientWithCookies();
         await player.RegisterAsync("joker");
+        var other = factory.CreateClientWithCookies();
+        await other.RegisterAsync("other");
 
         await factory.WithDbContextAsync(async db =>
         {
             var p = await db.Players.FirstAsync();
             p.HasJoker = true;
             p.CurrentPhase = Domain.Phase.Vote;
+            var o = await db.Players.SingleAsync(x => x.Username == "other");
+            o.VotesFinal = true;
             await db.SaveChangesAsync();
         });
 
@@ -114,6 +118,8 @@ public class SuggestionTests
             var p = await db.Players.FirstAsync();
             Assert.False(p.HasJoker);
             Assert.False(p.VotesFinal);
+            var o = await db.Players.SingleAsync(x => x.Username == "other");
+            Assert.False(o.VotesFinal);
         });
     }
 
@@ -219,4 +225,173 @@ public class SuggestionTests
         var mine = await client.GetFromJsonAsync<List<JsonElement>>("/api/suggestions/mine");
         Assert.Equal("Second", mine![0].GetProperty("name").GetString());
     }
+
+    [Fact]
+    public async Task Create_requires_suggest_phase_and_display_name()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("phasegate");
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var p = await db.Players.FirstAsync();
+            p.CurrentPhase = Domain.Phase.Vote;
+            p.DisplayName = null;
+            await db.SaveChangesAsync();
+        });
+
+        var badPhase = await client.PostAsJsonAsync("/api/suggestions", new { Name = "Nope", Genre = (string?)null, Description = (string?)null, ScreenshotUrl = (string?)null, YoutubeUrl = (string?)null, GameUrl = (string?)null, MinPlayers = (int?)null, MaxPlayers = (int?)null });
+        Assert.Equal(HttpStatusCode.BadRequest, badPhase.StatusCode);
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var p = await db.Players.FirstAsync();
+            p.CurrentPhase = Domain.Phase.Suggest;
+            await db.SaveChangesAsync();
+        });
+
+        var noDisplay = await client.PostAsJsonAsync("/api/suggestions", new { Name = "NoDisplay", Genre = (string?)null, Description = (string?)null, ScreenshotUrl = (string?)null, YoutubeUrl = (string?)null, GameUrl = (string?)null, MinPlayers = (int?)null, MaxPlayers = (int?)null });
+        Assert.Equal(HttpStatusCode.BadRequest, noDisplay.StatusCode);
+    }
+
+    [Fact]
+    public async Task Rejects_invalid_urls_name_length_and_player_counts()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("validate2");
+
+        var badGame = await client.PostAsJsonAsync("/api/suggestions", new { Name = "Bad", Genre = (string?)null, Description = (string?)null, ScreenshotUrl = (string?)null, YoutubeUrl = (string?)null, GameUrl = "ftp://bad", MinPlayers = (int?)null, MaxPlayers = (int?)null });
+        Assert.Equal(HttpStatusCode.BadRequest, badGame.StatusCode);
+
+        var badYoutube = await client.PostAsJsonAsync("/api/suggestions", new { Name = "BadYt", Genre = (string?)null, Description = (string?)null, ScreenshotUrl = (string?)null, YoutubeUrl = "file://bad", GameUrl = (string?)null, MinPlayers = (int?)null, MaxPlayers = (int?)null });
+        Assert.Equal(HttpStatusCode.BadRequest, badYoutube.StatusCode);
+
+        var longName = await client.PostAsJsonAsync("/api/suggestions", new { Name = new string('x', 101), Genre = (string?)null, Description = (string?)null, ScreenshotUrl = (string?)null, YoutubeUrl = (string?)null, GameUrl = (string?)null, MinPlayers = (int?)null, MaxPlayers = (int?)null });
+        Assert.Equal(HttpStatusCode.BadRequest, longName.StatusCode);
+
+        var minOnly = await client.PostAsJsonAsync("/api/suggestions", new { Name = "MinOnly", Genre = (string?)null, Description = (string?)null, ScreenshotUrl = (string?)null, YoutubeUrl = (string?)null, GameUrl = (string?)null, MinPlayers = 2, MaxPlayers = (int?)null });
+        Assert.Equal(HttpStatusCode.BadRequest, minOnly.StatusCode);
+
+        var maxTooHigh = await client.PostAsJsonAsync("/api/suggestions", new { Name = "MaxHigh", Genre = (string?)null, Description = (string?)null, ScreenshotUrl = (string?)null, YoutubeUrl = (string?)null, GameUrl = (string?)null, MinPlayers = 2, MaxPlayers = 40 });
+        Assert.Equal(HttpStatusCode.BadRequest, maxTooHigh.StatusCode);
+    }
+
+    [Fact]
+    public async Task Trims_and_truncates_optional_fields()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("trim");
+
+        var longGenre = new string('g', 60);
+        var longDesc = new string('d', 600);
+        var resp = await client.PostAsJsonAsync("/api/suggestions", new
+        {
+            Name = "Trim",
+            Genre = $"  {longGenre}  ",
+            Description = $"  {longDesc}  ",
+            ScreenshotUrl = "http://example.com/img.png",
+            YoutubeUrl = "http://example.com/y",
+            GameUrl = "http://example.com/g",
+            MinPlayers = 1,
+            MaxPlayers = 4
+        });
+        resp.EnsureSuccessStatusCode();
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            var s = await db.Suggestions.AsNoTracking().FirstAsync();
+            Assert.Equal(50, s.Genre!.Length);
+            Assert.Equal(500, s.Description!.Length);
+            Assert.Equal("http://example.com/img.png", s.ScreenshotUrl);
+        });
+    }
+
+    [Fact]
+    public async Task Mine_excludes_other_players()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var a = factory.CreateClientWithCookies();
+        await a.RegisterAsync("alice");
+        var b = factory.CreateClientWithCookies();
+        await b.RegisterAsync("bob");
+
+        await a.CreateSuggestionAsync("AliceGame");
+        await b.CreateSuggestionAsync("BobGame");
+
+        var mine = await a.GetFromJsonAsync<List<JsonElement>>("/api/suggestions/mine");
+        Assert.Single(mine!);
+        Assert.Equal("AliceGame", mine[0].GetProperty("name").GetString());
+    }
+
+    [Fact]
+    public async Task All_returns_link_metadata_and_ordering()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("owner");
+
+        var id1 = await client.CreateSuggestionAsync("Alpha");
+        await Task.Delay(10);
+        var id2 = await client.CreateSuggestionAsync("Beta");
+        await factory.WithDbContextAsync(async db =>
+        {
+            var beta = await db.Suggestions.FindAsync(id2);
+            beta!.ParentSuggestionId = id1;
+            await db.SaveChangesAsync();
+        });
+
+        await client.PostAsJsonAsync("/api/me/phase/next", new { }); // to Vote
+
+        var all = await client.GetFromJsonAsync<List<JsonElement>>("/api/suggestions/all");
+        Assert.Equal(2, all!.Count);
+        var first = all[0];
+        Assert.Equal("Alpha", first.GetProperty("name").GetString());
+        var second = all[1];
+        var linkedIds = second.GetProperty("linkedIds").EnumerateArray().Select(x => x.GetInt32()).ToList();
+        Assert.Contains(id1, linkedIds);
+        var linkedTitles = second.GetProperty("linkedTitles").EnumerateArray().Select(x => x.GetString()).ToList();
+        Assert.Contains("Alpha", linkedTitles);
+    }
+
+    [Fact]
+    public async Task Delete_respects_phase_and_clears_links_and_votes()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var owner = factory.CreateClientWithCookies();
+        await owner.RegisterAsync("deleter");
+        var other = factory.CreateClientWithCookies();
+        await other.RegisterAsync("voter");
+
+        var id = await owner.CreateSuggestionAsync("DeleteMe");
+        var child = await owner.CreateSuggestionAsync("Child");
+        await factory.WithDbContextAsync(async db =>
+        {
+            var c = await db.Suggestions.FindAsync(child);
+            c!.ParentSuggestionId = id;
+            await db.SaveChangesAsync();
+        });
+
+        await owner.PostAsJsonAsync("/api/me/phase/next", new { }); // Vote
+        await other.PostAsJsonAsync("/api/me/phase/next", new { });
+        await other.PostAsJsonAsync("/api/votes", new { SuggestionId = id, Score = 5 });
+
+        var blocked = await owner.DeleteAsync($"/api/suggestions/{id}");
+        Assert.Equal(HttpStatusCode.BadRequest, blocked.StatusCode);
+
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        var delete = await admin.DeleteAsync($"/api/suggestions/{id}");
+        delete.EnsureSuccessStatusCode();
+
+        await factory.WithDbContextAsync(async db =>
+        {
+            Assert.False(await db.Suggestions.AnyAsync(s => s.Id == id));
+            var childEntity = await db.Suggestions.FindAsync(child);
+            Assert.Null(childEntity!.ParentSuggestionId);
+            Assert.False(db.Votes.Any(v => v.SuggestionId == id));
+        });
+    }
 }
diff --git a/GameList.Tests/VoteTests.cs b/GameList.Tests/VoteTests.cs
index 87994ab..8a3e8bc 100644
--- a/GameList.Tests/VoteTests.cs
+++ b/GameList.Tests/VoteTests.cs
@@ -1,5 +1,6 @@
 using System.Net;
 using System.Net.Http.Json;
+using System.Text.Json;
 using GameList.Tests.Support;
 using Microsoft.EntityFrameworkCore;
 
@@ -42,6 +43,19 @@ public class VoteTests
         Assert.Equal(HttpStatusCode.BadRequest, resp.StatusCode);
     }
 
+    [Fact]
+    public async Task Negative_score_rejected()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("negative");
+        var id = await client.CreateSuggestionAsync("RangeGame2");
+        await client.PostAsJsonAsync("/api/me/phase/next", new { });
+
+        var resp = await client.PostAsJsonAsync("/api/votes", new { SuggestionId = id, Score = -1 });
+        Assert.Equal(HttpStatusCode.BadRequest, resp.StatusCode);
+    }
+
     [Fact]
     public async Task Invalid_suggestion_id_rejected()
     {
@@ -85,6 +99,25 @@ public class VoteTests
         Assert.Equal(HttpStatusCode.BadRequest, resp.StatusCode);
     }
 
+    [Fact]
+    public async Task Finalize_toggle_allows_unfinalize()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("toggle");
+        var id = await client.CreateSuggestionAsync("Toggle");
+        await client.PostAsJsonAsync("/api/me/phase/next", new { });
+        await client.PostAsJsonAsync("/api/votes", new { SuggestionId = id, Score = 5 });
+
+        var finalize = await client.PostAsJsonAsync("/api/votes/finalize", new { Final = true });
+        finalize.EnsureSuccessStatusCode();
+        var unfinalize = await client.PostAsJsonAsync("/api/votes/finalize", new { Final = false });
+        unfinalize.EnsureSuccessStatusCode();
+
+        var me = await client.GetFromJsonAsync<JsonElement>("/api/me");
+        Assert.False(me.GetProperty("votesFinal").GetBoolean());
+    }
+
     [Fact]
     public async Task Linked_votes_apply_to_all_linked_suggestions()
     {
@@ -114,5 +147,48 @@ public class VoteTests
         Assert.All(mine, v => Assert.Equal(9, v.Score));
     }
 
+    [Fact]
+    public async Task Linked_votes_apply_across_chain()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var admin = factory.CreateClientWithCookies();
+        await admin.RegisterAsync("admin", admin: true);
+        await admin.PostAsJsonAsync("/api/me/phase/next", new { });
+
+        var player = factory.CreateClientWithCookies();
+        await player.RegisterAsync("chain");
+
+        var a = await player.CreateSuggestionAsync("A");
+        var b = await player.CreateSuggestionAsync("B");
+        var c = await player.CreateSuggestionAsync("C");
+
+        await player.PostAsJsonAsync("/api/me/phase/next", new { });
+
+        await admin.PostAsJsonAsync("/api/admin/link-suggestions", new { SourceSuggestionId = a, TargetSuggestionId = b });
+        await admin.PostAsJsonAsync("/api/admin/link-suggestions", new { SourceSuggestionId = b, TargetSuggestionId = c });
+
+        var vote = await player.PostAsJsonAsync("/api/votes", new { SuggestionId = c, Score = 6 });
+        vote.EnsureSuccessStatusCode();
+
+        var mine = await player.GetFromJsonAsync<List<VoteRecord>>("/api/votes/mine");
+        Assert.NotNull(mine);
+        Assert.Equal(3, mine!.Count);
+        Assert.All(mine, v => Assert.Equal(6, v.Score));
+    }
+
+    [Fact]
+    public async Task Votes_mine_requires_vote_phase_and_auth()
+    {
+        using var factory = new TestWebApplicationFactory();
+        var anon = factory.CreateClient();
+        var unauth = await anon.GetAsync("/api/votes/mine");
+        Assert.Equal(HttpStatusCode.Unauthorized, unauth.StatusCode);
+
+        var client = factory.CreateClientWithCookies();
+        await client.RegisterAsync("phaseguard");
+        var resp = await client.GetAsync("/api/votes/mine");
+        Assert.Equal(HttpStatusCode.BadRequest, resp.StatusCode);
+    }
+
     private record VoteRecord(int SuggestionId, int Score);
 }
diff --git a/Program.cs b/Program.cs
index 322f49c..2eb91c9 100644
--- a/Program.cs
+++ b/Program.cs
@@ -6,6 +6,7 @@ using Microsoft.AspNetCore.DataProtection;
 using Microsoft.AspNetCore.HttpOverrides;
 using Microsoft.Data.Sqlite;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
 using System.Text.Json.Serialization;
 
 var builder = WebApplication.CreateBuilder(args);
@@ -56,6 +57,19 @@ builder.Services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationSc
             : CookieSecurePolicy.Always;
         options.SlidingExpiration = true;
         options.ExpireTimeSpan = TimeSpan.FromDays(30);
+        options.Events = new CookieAuthenticationEvents
+        {
+            OnRedirectToLogin = ctx =>
+            {
+                ctx.Response.StatusCode = StatusCodes.Status401Unauthorized;
+                return Task.CompletedTask;
+            },
+            OnRedirectToAccessDenied = ctx =>
+            {
+                ctx.Response.StatusCode = StatusCodes.Status401Unauthorized;
+                return Task.CompletedTask;
+            }
+        };
     });
 
 builder.Services.AddAuthorization(options =>
diff --git a/TASKS.md b/TASKS.md
index 415f907..0ac8c19 100644
--- a/TASKS.md
+++ b/TASKS.md
@@ -1,39 +1,39 @@
 # TASKS
 
 ## Authentication & Identity
-- [ ] Cover register success behavior: trims username/display name, enforces 24/16 char caps, issues auth cookie, stores normalized username (no plain passwords).
-- [ ] Add register/login rejection cases for overlength usernames/display names and ensure login success sets LastLoginAt + fills DisplayName when null.
-- [ ] Verify admin claim/authorization end-to-end: admin cookie includes claim; non-admin hitting `/api/admin/*` returns 401/403.
+- [x] Cover register success behavior: trims username/display name, enforces 24/16 char caps, issues auth cookie, stores normalized username (no plain passwords).
+- [x] Add register/login rejection cases for overlength usernames/display names and ensure login success sets LastLoginAt + fills DisplayName when null.
+- [x] Verify admin claim/authorization end-to-end: admin cookie includes claim; non-admin hitting `/api/admin/*` returns 401/403.
 
 ## State & Phase
-- [ ] Assert `/api/state` payload fields (currentPhase, votesFinal, hasJoker, counts) for authenticated user.
-- [ ] Test GetPhase alignment: legacy Reveal -> Vote; closing results (resultsOpen false) realigns users from Results to Vote and clears VotesFinal.
-- [ ] Add `/api/me/phase/next` happy path to Results when resultsOpen=true and ensure VotesFinal clears on advance; cover Suggest->Vote success.
-- [ ] Ensure `/api/me/phase/prev` clears VotesFinal and respects per-step back transitions; add name limit >16 rejection.
+- [x] Assert `/api/state` payload fields (currentPhase, votesFinal, hasJoker, counts) for authenticated user.
+- [x] Test GetPhase alignment: legacy Reveal -> Vote; closing results (resultsOpen false) realigns users from Results to Vote and clears VotesFinal.
+- [x] Add `/api/me/phase/next` happy path to Results when resultsOpen=true and ensure VotesFinal clears on advance; cover Suggest->Vote success.
+- [x] Ensure `/api/me/phase/prev` clears VotesFinal and respects per-step back transitions; add name limit >16 rejection.
 
 ## Suggestions
-- [ ] Enforce phase gating on create for non-admins outside Suggest (no joker) and require display name before create.
-- [ ] Add validation cases: invalid game/youtube URLs, missing/overlong name (>100), player count ranges (min<1, max>32, only one of min/max provided), trimming/truncation of optional fields.
-- [ ] Verify `/api/suggestions/mine` excludes other players; `/api/suggestions/all` returns ordered list with LinkedIds/LinkedTitles metadata.
-- [ ] Test DELETE: player can delete own in Suggest only; admin any time; links to children cleared and related votes removed.
-- [ ] Joker create path should unfinalize all players’ ballots, not just the caller.
+- [x] Enforce phase gating on create for non-admins outside Suggest (no joker) and require display name before create.
+- [x] Add validation cases: invalid game/youtube URLs, missing/overlong name (>100), player count ranges (min<1, max>32, only one of min/max provided), trimming/truncation of optional fields.
+- [x] Verify `/api/suggestions/mine` excludes other players; `/api/suggestions/all` returns ordered list with LinkedIds/LinkedTitles metadata.
+- [x] Test DELETE: player can delete own in Suggest only; admin any time; links to children cleared and related votes removed.
+- [x] Joker create path should unfinalize all players’ ballots, not just the caller.
 
 ## Votes
-- [ ] Guard `/api/votes/mine` for auth/phase mismatch; reject negative scores too.
-- [ ] Cover finalize toggle back to false and phase-change unfinalization; ensure VotesFinal blocks edits and resets correctly.
-- [ ] Add linked-vote coverage for nested/root-detection cases (e.g., chains) to ensure scores fan out as expected.
+- [x] Guard `/api/votes/mine` for auth/phase mismatch; reject negative scores too.
+- [x] Cover finalize toggle back to false and phase-change unfinalization; ensure VotesFinal blocks edits and resets correctly.
+- [x] Add linked-vote coverage for nested/root-detection cases (e.g., chains) to ensure scores fan out as expected.
 
 ## Results
-- [ ] Require Results phase and auth even when resultsOpen=true (phase mismatch/unauth 400/401).
-- [ ] Validate results payload fields: totals/count/average (average=0 when no votes), MyVote, link metadata, ordering by average.
+- [x] Require Results phase and auth even when resultsOpen=true (phase mismatch/unauth 400/401).
+- [x] Validate results payload fields: totals/count/average (average=0 when no votes), MyVote, link metadata, ordering by average.
 
 ## Admin Operations
-- [ ] Cover `/api/admin/results` closing path: moves everyone to Vote, clears VotesFinal, updates UpdatedAt timestamp.
-- [ ] Extend vote-status tests for mixed finalized vs waiting users and ordering by display/username.
-- [ ] Add happy-path joker grant in Vote phase; assert VotesFinal resets for that player.
-- [ ] Exercise link/unlink phase gating and not-found cases; verify linking re-parents groups, deletes group votes, and unfinalizes affected players counts; ensure unlink follows spec vs current NotFound-on-missing behavior.
-- [ ] Confirm reset clears HasJoker/VotesFinal and closes results; factory-reset re-seeds AppState defaults (ResultsOpen=false, UpdatedAt set).
+- [x] Cover `/api/admin/results` closing path: moves everyone to Vote, clears VotesFinal, updates UpdatedAt timestamp.
+- [x] Extend vote-status tests for mixed finalized vs waiting users and ordering by display/username.
+- [x] Add happy-path joker grant in Vote phase; assert VotesFinal resets for that player.
+- [x] Exercise link/unlink phase gating and not-found cases; verify linking re-parents groups, deletes group votes, and unfinalizes affected players counts; ensure unlink follows spec vs current NotFound-on-missing behavior.
+- [x] Confirm reset clears HasJoker/VotesFinal and closes results; factory-reset re-seeds AppState defaults (ResultsOpen=false, UpdatedAt set).
 
 ## Infrastructure/Helpers
-- [ ] Expand `IsReachableImageAsync` tests: HEAD success path, redirect rejection, oversized content-length guard, fallback GET with non-image content.
-- [ ] Add coverage for global exception handler returning JSON 500 and logging.
+- [x] Expand `IsReachableImageAsync` tests: HEAD success path, redirect rejection, oversized content-length guard, fallback GET with non-image content.
+- [x] Add coverage for global exception handler returning JSON 500 and logging.