feat(mission): wire class_level_up emits from every XP-granting controller

Every _xp.GrantAsync callsite now conditionally emits class_level_up:{class}
when the returned BattleXpGrantResult.LeveledUp is true. Six callsites total:

- PracticeController.Finish
- RankBattleController.FinishInternal
- FreeBattleController.Finish
- ArenaTwoPickBattleController.Finish (LeveledUp + ClassId routed via
  BattleFinishResultDto — controller-side signals, not on wire)
- ArenaColosseumBattleController (missed in the original wire-up survey;
  colosseum-battle XP now also fires the level-up event when applicable)
- StoryController.Finish (LeveledUp + ClassId routed via new
  StoryFinishOutcome wrapper, mirroring the TK2 RunFinishOutcome pattern)

Story's IStoryService.FinishAsync now returns StoryFinishOutcome instead of
FinishResponse directly. Test callsites updated to unwrap .Response.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.EmulatedEntrypoint/Controllers/ArenaColosseumBattleController.cs

@@ -4,6 +4,7 @@ using Microsoft.AspNetCore.Mvc;
 using SVSim.BattleNode.Bridge;
 using SVSim.Database;
 using SVSim.Database.Repositories.Viewer;
+using SVSim.Database.Services;
 using SVSim.Database.Services.BattleXp;
 using SVSim.EmulatedEntrypoint.Constants;
 using SVSim.EmulatedEntrypoint.Matching;
@@ -40,6 +41,7 @@ public sealed class ArenaColosseumBattleController : ControllerBase
     private readonly IColosseumProgressionService _progression;
     private readonly IViewerRepository _viewers;
     private readonly IBattleXpService _xp;
+    private readonly IMissionProgressService _missionProgress;
     private readonly SVSimDbContext _db;
     private readonly ILogger<ArenaColosseumBattleController> _log;
 
@@ -50,6 +52,7 @@ public sealed class ArenaColosseumBattleController : ControllerBase
         IColosseumProgressionService progression,
         IViewerRepository viewers,
         IBattleXpService xp,
+        IMissionProgressService missionProgress,
         SVSimDbContext db,
         ILogger<ArenaColosseumBattleController> log)
     {
@@ -59,6 +62,7 @@ public sealed class ArenaColosseumBattleController : ControllerBase
         _progression = progression;
         _viewers = viewers;
         _xp = xp;
+        _missionProgress = missionProgress;
         _db = db;
         _log = log;
     }
@@ -174,6 +178,7 @@ public sealed class ArenaColosseumBattleController : ControllerBase
         }
 
         int gainXp = 0, totalXp = 0, level = 1;
+        bool leveledUp = false;
         var viewer = await _viewers.LoadForBattleXpGrantAsync(vid, ct);
         if (viewer is not null)
         {
@@ -182,6 +187,13 @@ public sealed class ArenaColosseumBattleController : ControllerBase
             gainXp = xp.GetXp;
             totalXp = xp.TotalXp;
             level = xp.Level == 0 ? 1 : xp.Level;
+            leveledUp = xp.LeveledUp;
+        }
+
+        if (leveledUp)
+        {
+            await _missionProgress.RecordEventAsync(
+                vid, MissionEventKeys.ClassLevel.UpAll(req.ClassId), ct: ct);
         }
 
         // result_code 3502 ("battle already finished") is the idempotent-retry tolerance per

SVSim.EmulatedEntrypoint/Controllers/ArenaTwoPickBattleController.cs

@@ -128,6 +128,11 @@ public class ArenaTwoPickBattleController : SVSimController
                 vid,
                 isWin ? MissionEventKeys.Challenge.MatchWinAll() : MissionEventKeys.Challenge.MatchPlayAll(),
                 ct: ct);
+            if (result.LeveledUp)
+            {
+                await _missionProgress.RecordEventAsync(
+                    vid, MissionEventKeys.ClassLevel.UpAll(result.ClassId), ct: ct);
+            }
 
             return Ok(new BattleFinishResponseDto
             {

SVSim.EmulatedEntrypoint/Controllers/FreeBattleController.cs

@@ -114,6 +114,7 @@ public sealed class FreeBattleController : ControllerBase
         }
 
         int gainXp = 0, totalXp = 0, level = 1;
+        bool leveledUp = false;
         var viewer = await _viewers.LoadForBattleXpGrantAsync(vid, ct);
         if (viewer is not null)
         {
@@ -122,6 +123,7 @@ public sealed class FreeBattleController : ControllerBase
             gainXp = xp.GetXp;
             totalXp = xp.TotalXp;
             level = xp.Level == 0 ? 1 : xp.Level;
+            leveledUp = xp.LeveledUp;
         }
 
         // Mission counters — unranked wins feed ranked_or_arena_win + daily_match_win.
@@ -130,6 +132,11 @@ public sealed class FreeBattleController : ControllerBase
             await _missionProgress.RecordEventAsync(
                 vid, MissionEventKeys.Free.WinAll(), ct: ct);
         }
+        if (leveledUp)
+        {
+            await _missionProgress.RecordEventAsync(
+                vid, MissionEventKeys.ClassLevel.UpAll(req.ClassId), ct: ct);
+        }
 
         return Ok(new FreeBattleFinishResponseDto
         {

SVSim.EmulatedEntrypoint/Controllers/PracticeController.cs

@@ -122,6 +122,7 @@ public class PracticeController : SVSimController
         }
 
         int gainXp = 0, totalXp = 0, level = 1;
+        bool leveledUp = false;
         var viewer = await _viewers.LoadForBattleXpGrantAsync(viewerId);
         if (viewer is not null)
         {
@@ -130,6 +131,13 @@ public class PracticeController : SVSimController
             gainXp = xp.GetXp;
             totalXp = xp.TotalXp;
             level = xp.Level == 0 ? 1 : xp.Level;
+            leveledUp = xp.LeveledUp;
+        }
+
+        if (leveledUp)
+        {
+            await _missionProgress.RecordEventAsync(
+                viewerId, MissionEventKeys.ClassLevel.UpAll(request.ClassId));
         }
 
         return new PracticeFinishResponse

SVSim.EmulatedEntrypoint/Controllers/RankBattleController.cs

@@ -153,6 +153,7 @@ public sealed class RankBattleController : ControllerBase
         }
 
         int gainXp = 0, totalXp = 0, level = 1;
+        bool leveledUp = false;
         var rankResult = new RankProgressResult(0, 0, 0, 0, 0, false, false);
         var viewer = await _viewers.LoadForRankProgressAsync(vid, ct);
         if (viewer is not null)
@@ -163,6 +164,7 @@ public sealed class RankBattleController : ControllerBase
             gainXp = xp.GetXp;
             totalXp = xp.TotalXp;
             level = xp.Level == 0 ? 1 : xp.Level;
+            leveledUp = xp.LeveledUp;
         }
 
         // Mission counters — AI-rank routes emit the same keys as human-rank on a private server.
@@ -171,6 +173,11 @@ public sealed class RankBattleController : ControllerBase
             await _missionProgress.RecordEventAsync(
                 vid, MissionEventKeys.Ranked.WinAll(req.ClassId), ct: ct);
         }
+        if (leveledUp)
+        {
+            await _missionProgress.RecordEventAsync(
+                vid, MissionEventKeys.ClassLevel.UpAll(req.ClassId), ct: ct);
+        }
 
         return Ok(new RankBattleFinishResponseDto
         {

SVSim.EmulatedEntrypoint/Controllers/StoryController.cs

@@ -71,7 +71,7 @@ public class StoryController : SVSimController
     public async Task<ActionResult<FinishResponse>> Finish(FinishRequest req)
     {
         if (!TryGetViewerId(out long vid)) return Unauthorized();
-        var result = await _service.FinishAsync(ResolveApiType(), req, vid);
+        var outcome = await _service.FinishAsync(ResolveApiType(), req, vid);
 
         // Emit story-chapter-finish events for mission/achievement progress.
         var apiType = ResolveApiType();
@@ -87,8 +87,13 @@ public class StoryController : SVSimController
             await _missionProgress.RecordEventAsync(
                 vid, MissionEventKeys.Story.ChapterFinishAll(prefix, req.StoryId));
         }
+        if (outcome.LeveledUp && outcome.ClassId.HasValue)
+        {
+            await _missionProgress.RecordEventAsync(
+                vid, MissionEventKeys.ClassLevel.UpAll(outcome.ClassId.Value));
+        }
 
-        return result;
+        return outcome.Response;
     }
 
     [HttpPost("/main_story/all_finish")]