feat(server): add brand kit management and project binding

Add a brand kit domain with memory and postgres stores, a BrandKitService
for CRUD and resolution, and REST endpoints to list, upsert, and delete
brand kits. Projects can bind a brand kit whose resolved context and
reference images feed into the agent's long-term memory and design prompts.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

server/internal/logic/brand_kit_mapper.go

@@ -0,0 +1,25 @@
+package logic
+
+import (
+	"img_infinite_canvas/internal/domain/brandkit"
+	"img_infinite_canvas/internal/types"
+)
+
+func toAPIBrandKit(kit brandkit.Kit) types.BrandKit {
+	return types.BrandKit{
+		Id:        kit.ID,
+		Name:      kit.Name,
+		Document:  string(kit.Document),
+		IsDefault: kit.IsDefault,
+		CreatedAt: formatTime(kit.CreatedAt),
+		UpdatedAt: formatTime(kit.UpdatedAt),
+	}
+}
+
+func toAPIBrandKits(kits []brandkit.Kit) []types.BrandKit {
+	items := make([]types.BrandKit, 0, len(kits))
+	for _, kit := range kits {
+		items = append(items, toAPIBrandKit(kit))
+	}
+	return items
+}

server/internal/logic/create_project_async_logic.go

@@ -31,7 +31,7 @@ func (l *CreateProjectAsyncLogic) CreateProjectAsync(req *types.CreateProjectReq
 		return nil, err
 	}
 
-	project, err := l.svcCtx.DesignService.CreateProjectAsync(l.ctx, req.Title, req.Prompt, req.ImageModel, req.ImageSize, req.ImageQuality, int(req.ImageCount), req.EnableWebSearch)
+	project, err := l.svcCtx.DesignService.CreateProjectAsyncWithBrandKit(l.ctx, req.Title, req.Prompt, req.ImageModel, req.ImageSize, req.ImageQuality, int(req.ImageCount), req.EnableWebSearch, req.BrandKitId)
 	if err != nil {
 		return nil, err
 	}

server/internal/logic/create_project_logic.go

@@ -31,7 +31,7 @@ func (l *CreateProjectLogic) CreateProject(req *types.CreateProjectRequest) (res
 		return nil, err
 	}
 
-	project, err := l.svcCtx.DesignService.CreateProject(l.ctx, req.Title, req.Prompt, req.ImageModel, req.ImageSize, req.ImageQuality, int(req.ImageCount), req.EnableWebSearch)
+	project, err := l.svcCtx.DesignService.CreateProjectWithBrandKit(l.ctx, req.Title, req.Prompt, req.ImageModel, req.ImageSize, req.ImageQuality, int(req.ImageCount), req.EnableWebSearch, req.BrandKitId)
 	if err != nil {
 		return nil, err
 	}

server/internal/logic/delete_brand_kit_logic.go

@@ -0,0 +1,40 @@
+// Code scaffolded by goctl. Safe to edit.
+// goctl 1.10.1
+
+package logic
+
+import (
+	"context"
+
+	"img_infinite_canvas/internal/svc"
+	"img_infinite_canvas/internal/types"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type DeleteBrandKitLogic struct {
+	logx.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+func NewDeleteBrandKitLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeleteBrandKitLogic {
+	return &DeleteBrandKitLogic{
+		Logger: logx.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *DeleteBrandKitLogic) DeleteBrandKit(req *types.BrandKitIdRequest) (resp *types.DeleteBrandKitResponse, err error) {
+	if _, err := l.svcCtx.BrandKitService.Get(l.ctx, req.Id); err != nil {
+		return nil, err
+	}
+	if err := l.svcCtx.DesignService.ClearBrandKitBindings(l.ctx, req.Id); err != nil {
+		return nil, err
+	}
+	if err := l.svcCtx.BrandKitService.Delete(l.ctx, req.Id); err != nil {
+		return nil, err
+	}
+	return &types.DeleteBrandKitResponse{Id: req.Id, Deleted: true}, nil
+}

server/internal/logic/list_brand_kits_logic.go

@@ -0,0 +1,35 @@
+// Code scaffolded by goctl. Safe to edit.
+// goctl 1.10.1
+
+package logic
+
+import (
+	"context"
+
+	"img_infinite_canvas/internal/svc"
+	"img_infinite_canvas/internal/types"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type ListBrandKitsLogic struct {
+	logx.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+func NewListBrandKitsLogic(ctx context.Context, svcCtx *svc.ServiceContext) *ListBrandKitsLogic {
+	return &ListBrandKitsLogic{
+		Logger: logx.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *ListBrandKitsLogic) ListBrandKits() (resp *types.BrandKitListResponse, err error) {
+	kits, err := l.svcCtx.BrandKitService.List(l.ctx)
+	if err != nil {
+		return nil, err
+	}
+	return &types.BrandKitListResponse{BrandKits: toAPIBrandKits(kits)}, nil
+}

server/internal/logic/mapper.go

@@ -195,6 +195,7 @@ func toAPIProject(project design.Project) types.Project {
 		SnapshotId:   project.SnapshotID,
 		Canvas:       project.Canvas,
 		LastThreadId: project.LastThreadID,
+		BrandKitId:   project.BrandKitID,
 		Viewport:     toAPIView(project.Viewport),
 		Nodes:        toAPINodes(project.Nodes),
 		Connections:  toAPIConnections(project.Connections),
@@ -206,13 +207,14 @@ func toAPISummaries(items []design.ProjectSummary) []types.ProjectSummary {
 	resp := make([]types.ProjectSummary, 0, len(items))
 	for _, item := range items {
 		resp = append(resp, types.ProjectSummary{
-			Id:        item.ID,
-			UserId:    item.UserID,
-			Title:     item.Title,
-			Brief:     item.Brief,
-			Status:    string(item.Status),
-			Thumbnail: item.Thumbnail,
-			UpdatedAt: formatTime(item.UpdatedAt),
+			Id:         item.ID,
+			UserId:     item.UserID,
+			Title:      item.Title,
+			Brief:      item.Brief,
+			Status:     string(item.Status),
+			Thumbnail:  item.Thumbnail,
+			BrandKitId: item.BrandKitID,
+			UpdatedAt:  formatTime(item.UpdatedAt),
 		})
 	}
 	return resp

server/internal/logic/query_project_logic.go

@@ -86,6 +86,7 @@ func toQueryProjectResponse(project design.Project, permission string, visibilit
 			Version:        project.Version,
 			SnapshotId:     nil,
 			ItemId:         nil,
+			BrandKitId:     project.BrandKitID,
 			Permission:     permission,
 		},
 	}

server/internal/logic/update_project_brand_kit_logic.go

@@ -0,0 +1,39 @@
+// Code scaffolded by goctl. Safe to edit.
+// goctl 1.10.1
+
+package logic
+
+import (
+	"context"
+
+	sharingmodule "img_infinite_canvas/internal/modules/sharing"
+	"img_infinite_canvas/internal/svc"
+	"img_infinite_canvas/internal/types"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type UpdateProjectBrandKitLogic struct {
+	logx.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+func NewUpdateProjectBrandKitLogic(ctx context.Context, svcCtx *svc.ServiceContext) *UpdateProjectBrandKitLogic {
+	return &UpdateProjectBrandKitLogic{
+		Logger: logx.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *UpdateProjectBrandKitLogic) UpdateProjectBrandKit(req *types.UpdateProjectBrandKitRequest) (resp *types.ProjectResponse, err error) {
+	if access, ok := sharingmodule.AccessFromContext(l.ctx); ok && !access.IsOwner {
+		return nil, sharingmodule.ErrForbidden
+	}
+	project, err := l.svcCtx.DesignService.UpdateProjectBrandKit(l.ctx, req.Id, req.BrandKitId)
+	if err != nil {
+		return nil, err
+	}
+	return toProjectResponse(project), nil
+}

server/internal/logic/upsert_brand_kit_logic.go

@@ -0,0 +1,35 @@
+// Code scaffolded by goctl. Safe to edit.
+// goctl 1.10.1
+
+package logic
+
+import (
+	"context"
+
+	"img_infinite_canvas/internal/svc"
+	"img_infinite_canvas/internal/types"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type UpsertBrandKitLogic struct {
+	logx.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+func NewUpsertBrandKitLogic(ctx context.Context, svcCtx *svc.ServiceContext) *UpsertBrandKitLogic {
+	return &UpsertBrandKitLogic{
+		Logger: logx.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *UpsertBrandKitLogic) UpsertBrandKit(req *types.UpsertBrandKitRequest) (resp *types.BrandKitResponse, err error) {
+	kit, err := l.svcCtx.BrandKitService.Upsert(l.ctx, req.Id, req.Document, req.IsDefault)
+	if err != nil {
+		return nil, err
+	}
+	return &types.BrandKitResponse{BrandKit: toAPIBrandKit(kit)}, nil
+}