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/llm/dao/pricing.go

@@ -18,6 +18,7 @@ type CreditPriceRule struct {
 	CachedPriceMicros    int64  `gorm:"column:cached_price_micros"`
 	ReasoningPriceMicros int64  `gorm:"column:reasoning_price_micros"`
 	CreditPerYuan        int64  `gorm:"column:credit_per_yuan"`
+	ProfitRateBps        int64  `gorm:"column:profit_rate_bps"`
 	Status               string `gorm:"column:status"`
 	Priority             int    `gorm:"column:priority"`
 	Description          string `gorm:"column:description"`

backend/services/llm/pricing.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	llmdao "github.com/LoveLosita/smartflow/backend/services/llm/dao"
+	creditcontracts "github.com/LoveLosita/smartflow/backend/shared/contracts/creditstore"
 )
 
 const (
@@ -152,19 +153,18 @@ func quoteUsagePrice(rule llmdao.CreditPriceRule, input UsagePricingInput) Usage
 	nonCachedInputTokens := inputTokens - cachedTokens
 	nonReasoningOutputTokens := outputTokens - reasoningTokens
 
-	cachedPriceMicros := rule.CachedPriceMicros
-	if cachedPriceMicros <= 0 {
-		cachedPriceMicros = rule.InputPriceMicros
-	}
-	reasoningPriceMicros := rule.ReasoningPriceMicros
-	if reasoningPriceMicros <= 0 {
-		reasoningPriceMicros = rule.OutputPriceMicros
-	}
+	chargePrices := creditcontracts.DeriveChargePriceMicrosSet(
+		rule.InputPriceMicros,
+		rule.OutputPriceMicros,
+		rule.CachedPriceMicros,
+		rule.ReasoningPriceMicros,
+		rule.ProfitRateBps,
+	)
 
-	totalMicrosScaled := nonCachedInputTokens*maxInt64(rule.InputPriceMicros, 0) +
-		cachedTokens*maxInt64(cachedPriceMicros, 0) +
-		nonReasoningOutputTokens*maxInt64(rule.OutputPriceMicros, 0) +
-		reasoningTokens*maxInt64(reasoningPriceMicros, 0)
+	totalMicrosScaled := nonCachedInputTokens*maxInt64(chargePrices.InputChargePriceMicros, 0) +
+		cachedTokens*maxInt64(chargePrices.CachedChargePriceMicros, 0) +
+		nonReasoningOutputTokens*maxInt64(chargePrices.OutputChargePriceMicros, 0) +
+		reasoningTokens*maxInt64(chargePrices.ReasoningChargePriceMicros, 0)
 
 	rmbCostMicros := ceilDivInt64(totalMicrosScaled, tokenPriceScalePer1K)
 	creditCost := int64(0)