fix(billing): 封住发布前计费竞态

阻止上游提交状态不明的任务被租约接管后重复执行，并为人工复核保留可操作的结算记录。

将生产提交绑定到当前估价签名，统一复用预处理快照，并补强规则形状、定点溢出与历史规则兼容校验。

已通过 PostgreSQL 16 集成测试、Go 全量测试与静态检查、前端测试与构建、OpenAPI、依赖审计、镜像、迁移、流水线和 SemVer 门禁。

apps/api/internal/store/pricing_rules.go

@@ -335,6 +335,9 @@ ORDER BY priority ASC, resource_type ASC, rule_key ASC`, id)
 		default:
 			return EffectivePricingConfig{}, fmt.Errorf("pricing rule %s uses unsupported calculator %s", ruleKey, calculatorType)
 		}
+		if err := ValidateEffectivePricingRuleShape(resourceType, unit, calculatorType); err != nil {
+			return EffectivePricingConfig{}, fmt.Errorf("pricing rule %s: %w", ruleKey, err)
+		}
 		if strings.HasPrefix(strings.TrimSpace(basePrice), "-") {
 			return EffectivePricingConfig{}, fmt.Errorf("pricing rule %s has a negative base price", ruleKey)
 		}
@@ -372,6 +375,51 @@ ORDER BY priority ASC, resource_type ASC, rule_key ASC`, id)
 	}, nil
 }
 
+func ValidateEffectivePricingRuleShape(resourceType string, unit string, calculatorType string) error {
+	unit = NormalizeEffectivePricingRuleUnit(resourceType, unit)
+	if strings.TrimSpace(calculatorType) == "" {
+		calculatorType = DefaultEffectivePricingCalculator(resourceType)
+	}
+	allowed := false
+	switch resourceType {
+	case "text_input", "text_cached_input", "text_output", "text_total":
+		allowed = unit == "1k_tokens" && calculatorType == "token_usage"
+	case "image", "image_edit":
+		allowed = unit == "image" && calculatorType == "unit_weight"
+	case "video":
+		allowed = unit == "5s" && calculatorType == "duration_weight"
+	case "music":
+		allowed = (unit == "song" || unit == "item") && calculatorType == "unit_weight"
+	case "audio":
+		allowed = unit == "character" && calculatorType == "unit_weight"
+	default:
+		return nil
+	}
+	if !allowed {
+		return fmt.Errorf("unit %q and calculator %q do not match resource %q", unit, calculatorType, resourceType)
+	}
+	return nil
+}
+
+func NormalizeEffectivePricingRuleUnit(resourceType string, unit string) string {
+	unit = strings.TrimSpace(unit)
+	if resourceType == "video" && unit == "video" {
+		return "5s"
+	}
+	return unit
+}
+
+func DefaultEffectivePricingCalculator(resourceType string) string {
+	switch strings.TrimSpace(resourceType) {
+	case "text_input", "text_cached_input", "text_output", "text_total":
+		return "token_usage"
+	case "video":
+		return "duration_weight"
+	default:
+		return "unit_weight"
+	}
+}
+
 func addPricingRuleToConfig(config map[string]any, resourceType string, basePrice string, dynamicWeight map[string]any, formulaConfig map[string]any) {
 	resourceConfig := map[string]any{"basePrice": basePrice}
 	if len(dynamicWeight) > 0 {
@@ -591,7 +639,7 @@ func normalizePricingRule(input PricingRuleInput, index int, defaultCurrency str
 	input.RuleKey = strings.TrimSpace(input.RuleKey)
 	input.DisplayName = strings.TrimSpace(input.DisplayName)
 	input.ResourceType = strings.TrimSpace(input.ResourceType)
-	input.Unit = strings.TrimSpace(input.Unit)
+	input.Unit = NormalizeEffectivePricingRuleUnit(input.ResourceType, input.Unit)
 	input.Currency = strings.TrimSpace(input.Currency)
 	input.CalculatorType = strings.TrimSpace(input.CalculatorType)
 	input.Status = strings.TrimSpace(input.Status)
@@ -608,7 +656,7 @@ func normalizePricingRule(input PricingRuleInput, index int, defaultCurrency str
 		input.Currency = defaultCurrency
 	}
 	if input.CalculatorType == "" {
-		input.CalculatorType = "unit_weight"
+		input.CalculatorType = DefaultEffectivePricingCalculator(input.ResourceType)
 	}
 	if input.Priority == 0 {
 		input.Priority = (index + 1) * 10