Version: 0.9.77.dev.260505

后端：
1.阶段 6 CP4/CP5 目录收口与共享边界纯化
- 将 backend 根目录收口为 services、client、gateway、cmd、shared 五个一级目录
- 收拢 bootstrap、inits、infra/kafka、infra/outbox、conv、respond、pkg、middleware，移除根目录旧实现与空目录
- 将 utils 下沉到 services/userauth/internal/auth，将 logic 下沉到 services/schedule/core/planning
- 将迁移期 runtime 桥接实现统一收拢到 services/runtime/{conv,dao,eventsvc,model}，删除 shared/legacy 与未再被 import 的旧 service 实现
- 将 gateway/shared/respond 收口为 HTTP/Gin 错误写回适配，shared/respond 仅保留共享错误语义与状态映射
- 将 HTTP IdempotencyMiddleware 与 RateLimitMiddleware 收口到 gateway/middleware
- 将 GormCachePlugin 下沉到 shared/infra/gormcache，将共享 RateLimiter 下沉到 shared/infra/ratelimit，将 agent token budget 下沉到 services/agent/shared
- 删除 InitEino 兼容壳，收缩 cmd/internal/coreinit 仅保留旧组合壳残留域初始化语义
- 更新微服务迁移计划与桌面 checklist，补齐 CP4/CP5 当前切流点、目录终态与验证结果
- 完成 go test ./...、git diff --check 与最终真实 smoke；health、register/login、task/create+get、schedule/today、task-class/list、memory/items、agent chat/meta/timeline/context-stats 全部 200，SSE 合并结果为 CP5_OK 且 [DONE] 只有 1 个

backend/services/agent/sv/agent.go

@@ -9,18 +9,18 @@ import (
 	"strings"
 	"time"
 
-	"github.com/LoveLosita/smartflow/backend/conv"
-	"github.com/LoveLosita/smartflow/backend/dao"
-	outboxinfra "github.com/LoveLosita/smartflow/backend/infra/outbox"
-	"github.com/LoveLosita/smartflow/backend/model"
-	"github.com/LoveLosita/smartflow/backend/pkg"
-	eventsvc "github.com/LoveLosita/smartflow/backend/service/events"
 	agentmodel "github.com/LoveLosita/smartflow/backend/services/agent/model"
 	agentprompt "github.com/LoveLosita/smartflow/backend/services/agent/prompt"
+	agentshared "github.com/LoveLosita/smartflow/backend/services/agent/shared"
 	agenttools "github.com/LoveLosita/smartflow/backend/services/agent/tools"
 	llmservice "github.com/LoveLosita/smartflow/backend/services/llm"
 	memorymodel "github.com/LoveLosita/smartflow/backend/services/memory/model"
 	memoryobserve "github.com/LoveLosita/smartflow/backend/services/memory/observe"
+	"github.com/LoveLosita/smartflow/backend/services/runtime/conv"
+	"github.com/LoveLosita/smartflow/backend/services/runtime/dao"
+	eventsvc "github.com/LoveLosita/smartflow/backend/services/runtime/eventsvc"
+	"github.com/LoveLosita/smartflow/backend/services/runtime/model"
+	outboxinfra "github.com/LoveLosita/smartflow/backend/shared/infra/outbox"
 	"github.com/cloudwego/eino/schema"
 	"github.com/google/uuid"
 )
@@ -333,7 +333,7 @@ func (s *AgentService) runNormalChatFlow(
 	if chatHistory == nil {
 		// 2. 缓存未命中时回源 DB，并转换为 Eino message 格式。
 		cacheMiss = true
-		histories, hisErr := s.repo.GetUserChatHistories(ctx, userID, pkg.HistoryFetchLimitByModel(resolvedModelName), chatID)
+		histories, hisErr := s.repo.GetUserChatHistories(ctx, userID, agentshared.HistoryFetchLimitByModel(resolvedModelName), chatID)
 		if hisErr != nil {
 			pushErrNonBlocking(errChan, hisErr)
 			return
@@ -343,12 +343,12 @@ func (s *AgentService) runNormalChatFlow(
 
 	// 3. 计算本次请求可用的历史 token 预算，并执行历史裁剪。
 	//    这样可以在上下文增长时稳定控制模型窗口，避免超长上下文引发报错或高延迟。
-	historyBudget := pkg.HistoryTokenBudgetByModel(resolvedModelName, agentprompt.SystemPrompt, userMessage)
-	trimmedHistory, totalHistoryTokens, keptHistoryTokens, droppedCount := pkg.TrimHistoryByTokenBudget(chatHistory, historyBudget)
+	historyBudget := agentshared.HistoryTokenBudgetByModel(resolvedModelName, agentprompt.SystemPrompt, userMessage)
+	trimmedHistory, totalHistoryTokens, keptHistoryTokens, droppedCount := agentshared.TrimHistoryByTokenBudget(chatHistory, historyBudget)
 	chatHistory = trimmedHistory
 
 	// 4. 根据裁剪后历史长度更新 Redis 会话窗口配置，并主动执行窗口收敛。
-	targetWindow := pkg.CalcSessionWindowSize(len(chatHistory))
+	targetWindow := agentshared.CalcSessionWindowSize(len(chatHistory))
 	if err = s.agentCache.SetSessionWindowSize(ctx, chatID, targetWindow); err != nil {
 		log.Printf("设置历史窗口失败 chat=%s: %v", chatID, err)
 	}