fix(guild): /guild/join returns guild_status per branch (APPLYING for approval path, JOINING otherwise)

GuildJoinTask.Parse() reads data[guild_status].ToInt() directly; hardcoding 2
for the APPROVAL path was wrong. GuildOpResult gains nullable GuildStatus; JoinAsync
sets 1 (APPLYING) for the pending-request path and 2 (JOINING) for instant joins.
Controller reads r.GuildStatus. Two new tests assert the wire value per path.

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

SVSim.UnitTests/Integration/Guild/GuildJoinFlowTests.cs

@@ -193,6 +193,58 @@ public class GuildJoinFlowTests
             "Idempotent re-apply must not duplicate the pending row");
     }
 
+    [Test]
+    public async Task Approval_join_response_has_guild_status_APPLYING()
+    {
+        using var factory = new SVSimTestFactory();
+
+        long viewerA = await factory.SeedViewerAsync(steamId: 76_561_198_400_000_025UL, displayName: "ApprovalLeaderStatus");
+        using var clientA = factory.CreateAuthenticatedClient(viewerA);
+        int guildId = await CreateGuildAndGetIdAsync(clientA, "ApprovalGuildStatus", joinCondition: 2);
+
+        long viewerB = await factory.SeedViewerAsync(steamId: 76_561_198_400_000_026UL, displayName: "ApprovalApplicantStatus");
+        using var clientB = factory.CreateAuthenticatedClient(viewerB);
+
+        // B applies to the APPROVAL guild.
+        var joinResp = await clientB.PostAsync("/guild/join",
+            JsonContent.Create(new { guild_id = guildId, from_invite = false,
+                viewer_id = Vid, steam_id = Sid, steam_session_ticket = Stk }));
+        var joinJson = await joinResp.Content.ReadAsStringAsync();
+        Assert.That(joinResp.IsSuccessStatusCode, Is.True, $"join HTTP failed: {joinJson}");
+
+        using var joinDoc = JsonDocument.Parse(joinJson);
+        // Must be APPLYING (1), NOT JOINING (2) — GuildJoinTask.Parse() reads this value directly.
+        Assert.That(GetStringifiedInt(joinDoc.RootElement, "guild_status"), Is.EqualTo(1),
+            $"APPROVAL branch must return guild_status=1 (APPLYING), got: {joinJson}");
+    }
+
+    [Test]
+    public async Task Approval_idempotent_join_response_has_guild_status_APPLYING()
+    {
+        using var factory = new SVSimTestFactory();
+
+        long viewerA = await factory.SeedViewerAsync(steamId: 76_561_198_400_000_027UL, displayName: "IdempotentApprovalLeaderStatus");
+        using var clientA = factory.CreateAuthenticatedClient(viewerA);
+        int guildId = await CreateGuildAndGetIdAsync(clientA, "IdempotentApprovalStatus", joinCondition: 2);
+
+        long viewerB = await factory.SeedViewerAsync(steamId: 76_561_198_400_000_028UL, displayName: "IdempotentApplicantStatus");
+        using var clientB = factory.CreateAuthenticatedClient(viewerB);
+
+        var joinPayload = new { guild_id = guildId, from_invite = false,
+            viewer_id = Vid, steam_id = Sid, steam_session_ticket = Stk };
+
+        // First apply.
+        await clientB.PostAsync("/guild/join", JsonContent.Create(joinPayload));
+        // Second (idempotent) apply — should still return APPLYING (1).
+        var join2 = await clientB.PostAsync("/guild/join", JsonContent.Create(joinPayload));
+        var join2Json = await join2.Content.ReadAsStringAsync();
+        Assert.That(join2.IsSuccessStatusCode, Is.True, $"Idempotent apply HTTP failed: {join2Json}");
+
+        using var join2Doc = JsonDocument.Parse(join2Json);
+        Assert.That(GetStringifiedInt(join2Doc.RootElement, "guild_status"), Is.EqualTo(1),
+            $"Idempotent APPROVAL branch must return guild_status=1 (APPLYING), got: {join2Json}");
+    }
+
     // ─── ONLY_INVITE branch ──────────────────────────────────────────────────────
 
     [Test]