refactor(bootstrap): migrate practice opponents to seed file

Move /practice/info handling out of GlobalsImporter into a dedicated
PracticeOpponentImporter that reads a normalized JSON seed file
generated by data_dumps/extract/extract-practice-opponents.ps1.

SVSim.Bootstrap/Importers/GlobalsImporter.cs

@@ -31,7 +31,6 @@ public class GlobalsImporter
         JsonElement? mypageIndex = LoadCapture(capturesDir, "mypage-index");
         JsonElement? deckInfo = LoadCapture(capturesDir, "deck-info");
         JsonElement? paymentItemList = LoadCapture(capturesDir, "payment-item-list");
-        JsonElement? practiceInfo = LoadCapture(capturesDir, "practice-info");
         JsonElement? packInfo = LoadCapture(capturesDir, "pack-info");
         JsonElement? basicPuzzleInfo = LoadCapture(capturesDir, "basic-puzzle-info");
         JsonElement? basicPuzzleMission = LoadCapture(capturesDir, "basic-puzzle-mission");
@@ -75,11 +74,6 @@ public class GlobalsImporter
             total += await ImportPaymentItems(context, paymentItemList.Value);
         }
 
-        if (practiceInfo.HasValue)
-        {
-            total += await ImportPracticeOpponents(context, practiceInfo.Value);
-        }
-
         if (packInfo.HasValue)
         {
             total += await ImportPacks(context, packInfo.Value);
@@ -879,47 +873,6 @@ public class GlobalsImporter
         return created + updated;
     }
 
-    // ---------- Practice Opponents ----------
-
-    /// <summary>
-    /// Capture is the full /practice/info envelope; <c>data</c> is a JSON ARRAY (not an object,
-    /// unlike most endpoints). Each row is one AI opponent row keyed on practice_id. Prod sends
-    /// numeric fields as strings — GetInt tolerates both. Rows present in the DB but missing
-    /// from the capture are LEFT INTACT (consistent with the rest of GlobalsImporter; partial
-    /// captures shouldn't silently delete entries).
-    /// </summary>
-    private async Task<int> ImportPracticeOpponents(SVSimDbContext context, JsonElement practiceData)
-    {
-        if (practiceData.ValueKind != JsonValueKind.Array) return 0;
-
-        var existing = await context.PracticeOpponents.ToDictionaryAsync(e => e.Id);
-        int created = 0, updated = 0;
-
-        foreach (var row in practiceData.EnumerateArray())
-        {
-            int practiceId = GetInt(row, "practice_id");
-            if (practiceId == 0) continue; // malformed row
-
-            var entry = existing.TryGetValue(practiceId, out var ex) ? ex : new PracticeOpponentEntry { Id = practiceId };
-            entry.TextId = GetString(row, "text_id");
-            entry.ClassId = GetInt(row, "class_id");
-            entry.CharaId = GetInt(row, "chara_id");
-            entry.DegreeId = GetInt(row, "degree_id");
-            entry.AiDeckLevel = GetInt(row, "ai_deck_level");
-            entry.AiLogicLevel = GetInt(row, "ai_logic_level");
-            entry.AiMaxLife = GetInt(row, "ai_max_life");
-            entry.Battle3dFieldId = GetString(row, "battle3dfield_id", "1");
-            entry.IsMaintenance = GetBool(row, "is_maintenance");
-            entry.IsCampaignPractice = GetBool(row, "is_campaign_practice");
-
-            if (ex is null) { context.PracticeOpponents.Add(entry); created++; }
-            else updated++;
-        }
-
-        Console.WriteLine($"[GlobalsImporter] PracticeOpponents: +{created}/~{updated}");
-        return created + updated;
-    }
-
     // ---------- Basic Puzzle Groups + Puzzles ----------
 
     /// <summary>

SVSim.Bootstrap/Importers/PracticeOpponentImporter.cs

@@ -0,0 +1,54 @@
+using Microsoft.EntityFrameworkCore;
+using SVSim.Bootstrap.Models.Seed;
+using SVSim.Database;
+using SVSim.Database.Models;
+
+namespace SVSim.Bootstrap.Importers;
+
+/// <summary>
+/// Idempotent upsert of practice opponents from <c>seeds/practice-opponents.json</c>.
+/// Rows missing from the seed are LEFT INTACT (consistent with the previous import behavior;
+/// a partial seed shouldn't silently delete entries).
+/// </summary>
+public class PracticeOpponentImporter
+{
+    public async Task<int> ImportAsync(SVSimDbContext context, string seedDir)
+    {
+        string path = Path.Combine(seedDir, "practice-opponents.json");
+        var seed = SeedLoader.LoadList<PracticeOpponentSeed>(path);
+        if (seed.Count == 0)
+        {
+            Console.WriteLine("[PracticeOpponentImporter] No seed rows; skipping.");
+            return 0;
+        }
+
+        var existing = await context.PracticeOpponents.ToDictionaryAsync(e => e.Id);
+        int created = 0, updated = 0;
+
+        foreach (var s in seed)
+        {
+            if (s.PracticeId == 0) continue;
+
+            var entry = existing.TryGetValue(s.PracticeId, out var ex)
+                ? ex : new PracticeOpponentEntry { Id = s.PracticeId };
+
+            entry.TextId = s.TextId;
+            entry.ClassId = s.ClassId;
+            entry.CharaId = s.CharaId;
+            entry.DegreeId = s.DegreeId;
+            entry.AiDeckLevel = s.AiDeckLevel;
+            entry.AiLogicLevel = s.AiLogicLevel;
+            entry.AiMaxLife = s.AiMaxLife;
+            entry.Battle3dFieldId = s.Battle3dFieldId;
+            entry.IsMaintenance = s.IsMaintenance;
+            entry.IsCampaignPractice = s.IsCampaignPractice;
+
+            if (ex is null) { context.PracticeOpponents.Add(entry); created++; }
+            else updated++;
+        }
+
+        await context.SaveChangesAsync();
+        Console.WriteLine($"[PracticeOpponentImporter] +{created}/~{updated}");
+        return created + updated;
+    }
+}

SVSim.Bootstrap/Models/Seed/PracticeOpponentSeed.cs

@@ -0,0 +1,18 @@
+using System.Text.Json.Serialization;
+
+namespace SVSim.Bootstrap.Models.Seed;
+
+public sealed class PracticeOpponentSeed
+{
+    [JsonPropertyName("practice_id")] public int PracticeId { get; set; }
+    [JsonPropertyName("text_id")] public string TextId { get; set; } = "";
+    [JsonPropertyName("class_id")] public int ClassId { get; set; }
+    [JsonPropertyName("chara_id")] public int CharaId { get; set; }
+    [JsonPropertyName("degree_id")] public int DegreeId { get; set; }
+    [JsonPropertyName("ai_deck_level")] public int AiDeckLevel { get; set; }
+    [JsonPropertyName("ai_logic_level")] public int AiLogicLevel { get; set; }
+    [JsonPropertyName("ai_max_life")] public int AiMaxLife { get; set; }
+    [JsonPropertyName("battle3dfield_id")] public string Battle3dFieldId { get; set; } = "1";
+    [JsonPropertyName("is_maintenance")] public bool IsMaintenance { get; set; }
+    [JsonPropertyName("is_campaign_practice")] public bool IsCampaignPractice { get; set; }
+}

SVSim.Bootstrap/Program.cs

@@ -76,6 +76,7 @@ public static class Program
         if (!opts.SkipGlobals)
         {
             await new GlobalsImporter().ImportAllAsync(context, opts.CapturesDir);
+            await new PracticeOpponentImporter().ImportAsync(context, opts.SeedDir);
 
             // BuildDeck pipeline: series CSV → catalog JSON → package CSV. Catalog must run after
             // series CSV (FK on products → series) and before package CSV (so the catalog-side
@@ -152,6 +153,7 @@ public static class Program
         string refDir = referenceDataDir ?? shippedDataDir;
         string shippedStoryDir = Path.Combine(shippedDataDir, "story");
         string storyDir = storyDataDir ?? shippedStoryDir;
+        string shippedSeedDir = Path.Combine(shippedDataDir, "seeds");
 
         string connStr = connection
             ?? Environment.GetEnvironmentVariable("NPGSQL_CONNECTION")
@@ -159,7 +161,7 @@ public static class Program
 
         return new BootstrapOptions(
             cardsFile, capturesDir, refDir, connStr, skipReference, skipCards, skipGlobals,
-            skipStory, storyDir);
+            skipStory, storyDir, shippedSeedDir);
     }
 
     private static string NextArg(string[] args, ref int i)
@@ -204,5 +206,6 @@ public static class Program
         bool SkipCards,
         bool SkipGlobals,
         bool SkipStory,
-        string StoryDataDir);
+        string StoryDataDir,
+        string SeedDir);
 }