fix(server): restore achievements, progress, claims and experience

Load ordinary achievements and send transactional gameplay progress notifications.
Restore main-story clears and recorded gacha history without duplicate credit.
Validate claim thresholds and prior tiers, credit wallet rewards and persist
achievement experience in login responses.

go/internal/server/gamedata/achievement_test.go

@@ -3,6 +3,8 @@ package gamedata
 import (
 	"bd2server/internal/server/wire"
 	"database/sql"
+	"encoding/binary"
+	"math"
 	"testing"
 )
 
@@ -32,3 +34,25 @@ func TestAchievementCounterDesignUsesRootGroupsAndBothContents(t *testing.T) {
 		t.Fatalf("wrong group index: %#v", d)
 	}
 }
+
+func TestAchievementRewardDesignIncludesOrdinaryZeroContentsAndTargets(t *testing.T) {
+	db, err := sql.Open("sqlite", ":memory:")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+	db.Exec("CREATE TABLE AchievementTable(ProtoBuf BLOB)")
+	raw := wire.AppendVarint(wire.AppendVarint(nil, 9, 987), 11, 1)
+	raw = wire.AppendVarint(raw, 8, 9)
+	raw = append(raw, 25)
+	raw = binary.LittleEndian.AppendUint64(raw, math.Float64bits(10))
+	db.Exec("INSERT INTO AchievementTable VALUES (?)", raw)
+	d := &MissionDesign{Achievements: map[AchievementKey]AchievementDesign{}}
+	if err := loadAchievementRows(db, d); err != nil {
+		t.Fatal(err)
+	}
+	got, ok := d.Achievements[AchievementKey{GroupID: 987, ID: 1}]
+	if !ok || got.Target != 10 || got.AddExp != 9 {
+		t.Fatalf("ordinary=%+v exists=%v", got, ok)
+	}
+}