feat: Enhance AI Agent and Channel Management

- Updated labels in the AI Agents dashboard for clarity, changing "流程状态" to "Playbook 状态" and "未发布流程" to "未发布 Playbook".
- Introduced AI Agent rollout percentage management in channel editing, allowing users to set and rollback rollout percentages.
- Added new API endpoints for rolling back AI Agent rollout and fetching agent run metrics.
- Implemented new UI components for displaying agent run details, including status, duration, and input/output tokens.
- Enhanced type definitions for AdminChannel and AIAgent to include rollout percentages and runtime modes.
- Updated navigation to include a section for agent runs.
- Added new translations for agent run features in both English and Chinese.

internal/ai/runtime/reply_eligibility.go

@@ -1,6 +1,10 @@
 package runtime
 
 import (
+	"crypto/sha256"
+	"encoding/binary"
+	"fmt"
+
 	"agent-desk/internal/models"
 	"agent-desk/internal/pkg/enums"
 
@@ -13,6 +17,36 @@ func newReplyEligibility() *replyEligibility {
 	return &replyEligibility{}
 }
 
+// IsAIAgentRolloutEligible uses a stable conversation bucket so one customer
+// remains consistently inside or outside a gray release throughout a session.
+// Missing legacy values are treated as 100 to preserve existing behavior.
+func IsAIAgentRolloutEligible(conversation models.Conversation, aiAgent models.AIAgent, channel *models.Channel) bool {
+	percent := normalizedRolloutPercent(aiAgent.RolloutPercent)
+	if channel != nil {
+		channelPercent := normalizedRolloutPercent(channel.AIAgentRolloutPercent)
+		if channelPercent < percent {
+			percent = channelPercent
+		}
+	}
+	if percent >= 100 {
+		return true
+	}
+	if conversation.ID <= 0 {
+		return false
+	}
+	seed := fmt.Sprintf("channel=%d;conversation=%d;agent=%d", conversation.ChannelID, conversation.ID, aiAgent.ID)
+	sum := sha256.Sum256([]byte(seed))
+	bucket := int(binary.BigEndian.Uint64(sum[:8]) % 100)
+	return bucket < percent
+}
+
+func normalizedRolloutPercent(percent int) int {
+	if percent <= 0 || percent > 100 {
+		return 100
+	}
+	return percent
+}
+
 func (e *replyEligibility) CanReply(conversation models.Conversation, message models.Message, aiAgent models.AIAgent) bool {
 	if message.SenderType != enums.IMSenderTypeCustomer {
 		return false