Version: 0.9.81.dev.260506

后端：
1. Credit 价格规则补齐利润率与实际计费单价语义：新增 `profit_rate_bps` 与 `charge_*_price_micros` 展示字段，下沉共享价格推导 helper，tokenstore rpc/client/proto/model/default rule 全链路同步，LLM usage 扣费统一改按加价后的 charge 单价换算。
2. task-class 更新链路修正全量覆盖与归属校验：`runtime/conv` 保留 item id，DAO 更新前显式校验 task-class 与 item 归属，改用显式字段 map 落库 nil/空切片/零值，避免 `RowsAffected=0` 误判越权，同时补齐任务项可编辑字段更新。
3. GormCache task-class 失效补空 user_id 保护：更新语句缺少模型上下文时直接跳过失效，避免缓存插件因空指针影响主事务。

前端：
4. 课表中心补齐任务类编辑能力：新增 `updateTaskClass` API，创建弹窗支持编辑态回填与 item id 提交，日程页支持先拉详情再编辑并在保存后刷新任务类详情与列表。
5. 计划广场详情补点赞交互与奖励提示：详情页新增点赞/取消点赞按钮、奖励反馈文案与计数展示，论坛类型补 `reward_hint`，评论区与帖子作者头像统一接入兜底头像工具。
6. 品牌与展示细节收口：侧边栏与 favicon 切到项目 logo，首页标题改为 `SmartMate`，主面板缩放上限微调，论坛列表头像显示与整体品牌观感同步统一。

backend/services/tokenstore/rpc/credit.go

@@ -336,18 +336,23 @@ func creditTransactionsToPB(items []creditcontracts.CreditTransactionView) []*pb
 
 func creditPriceRuleToPB(rule creditcontracts.CreditPriceRuleView) *pb.CreditPriceRuleView {
 	return &pb.CreditPriceRuleView{
-		RuleId:               rule.RuleID,
-		Scene:                rule.Scene,
-		ProviderName:         rule.ProviderName,
-		ModelName:            rule.ModelName,
-		InputPriceMicros:     rule.InputPriceMicros,
-		OutputPriceMicros:    rule.OutputPriceMicros,
-		CachedPriceMicros:    rule.CachedPriceMicros,
-		ReasoningPriceMicros: rule.ReasoningPriceMicros,
-		CreditPerYuan:        rule.CreditPerYuan,
-		Status:               rule.Status,
-		Priority:             int32(rule.Priority),
-		Description:          rule.Description,
+		RuleId:                     rule.RuleID,
+		Scene:                      rule.Scene,
+		ProviderName:               rule.ProviderName,
+		ModelName:                  rule.ModelName,
+		InputPriceMicros:           rule.InputPriceMicros,
+		OutputPriceMicros:          rule.OutputPriceMicros,
+		CachedPriceMicros:          rule.CachedPriceMicros,
+		ReasoningPriceMicros:       rule.ReasoningPriceMicros,
+		CreditPerYuan:              rule.CreditPerYuan,
+		ProfitRateBps:              rule.ProfitRateBps,
+		ChargeInputPriceMicros:     rule.ChargeInputPriceMicros,
+		ChargeOutputPriceMicros:    rule.ChargeOutputPriceMicros,
+		ChargeCachedPriceMicros:    rule.ChargeCachedPriceMicros,
+		ChargeReasoningPriceMicros: rule.ChargeReasoningPriceMicros,
+		Status:                     rule.Status,
+		Priority:                   int32(rule.Priority),
+		Description:                rule.Description,
 	}
 }