feat: implement context loader for AI agent and refactor plan service to utilize it

internal/ai/skills/context_loader.go

@@ -0,0 +1,30 @@
+package skills
+
+import (
+	"cs-agent/internal/models"
+	"cs-agent/internal/pkg/errorsx"
+	"cs-agent/internal/repositories"
+
+	"github.com/mlogclub/simple/sqls"
+)
+
+func newContextLoader() *contextLoader {
+	return &contextLoader{}
+}
+
+type contextLoader struct{}
+
+func (l *contextLoader) loadAIAgentWithConfig(aiAgentID int64) (*models.AIAgent, *models.AIConfig, error) {
+	if aiAgentID <= 0 {
+		return nil, nil, errorsx.InvalidParam("AIAgentID不能为空")
+	}
+	aiAgent := repositories.AIAgentRepository.Get(sqls.DB(), aiAgentID)
+	if aiAgent == nil {
+		return nil, nil, errorsx.InvalidParam("AI Agent不存在")
+	}
+	aiConfig := repositories.AIConfigRepository.Get(sqls.DB(), aiAgent.AIConfigID)
+	if aiConfig == nil {
+		return nil, nil, errorsx.InvalidParam("AI Agent关联的AI配置不存在")
+	}
+	return aiAgent, aiConfig, nil
+}