Implement achievement list

Signed-off-by: Sean Du <do4suki@gmail.com>

internal/handler/api/achievement/initialaccomplishedlist.go

@@ -0,0 +1,44 @@
+package achievement
+
+import (
+	achievementapischema "honoka-chan/internal/schema/api/achievement"
+	"honoka-chan/internal/session"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+func initialAccomplishedList(ctx *gin.Context) (res any, err error) {
+	ss := session.Get(ctx)
+
+	grouped, err := ListVisibleAccomplishedAchievements(ss)
+	if err != nil {
+		return nil, err
+	}
+
+	listData := make([]achievementapischema.UnaccomplishListData, 0, len(achievementFilterCategoryList))
+	for _, filterCategoryID := range achievementFilterCategoryList {
+		achievementItems := grouped[filterCategoryID]
+		if achievementItems == nil {
+			achievementItems = []achievementapischema.AchievementListItem{}
+		} else {
+			if len(achievementItems) > 5 {
+				achievementItems = achievementItems[:5]
+			}
+		}
+
+		listData = append(listData, achievementapischema.UnaccomplishListData{
+			FilterCategoryID: filterCategoryID,
+			AchievementList:  achievementItems,
+			Count:            len(grouped[filterCategoryID]),
+			IsLast:           true,
+		})
+	}
+
+	return achievementapischema.UnaccomplishListResp{
+		Result:     listData,
+		Status:     200,
+		CommandNum: false,
+		TimeStamp:  time.Now().Unix(),
+	}, nil
+}