按后台配置扣除创作泥点

前端创作表单泥点预校验改为读取入口契约配置

拼图和抓大鹅初始生成后端扣费改为解析后台配置

汪汪声浪初始三图生成按入口总成本拆分扣费

创作工作台按钮和确认弹窗展示后台配置泥点成本

补充泥点扣费回归测试并同步文档与共享记忆

server-rs/crates/api-server/src/creation_entry_config.rs

@@ -126,6 +126,44 @@ pub fn resolve_creation_entry_route_id(path: &str) -> Option<&'static str> {
     None
 }
 
+pub(crate) fn resolve_creation_entry_mud_point_cost_from_config(
+    config: &CreationEntryConfigResponse,
+    creation_type_id: &str,
+    fallback_cost: u64,
+) -> u64 {
+    config
+        .creation_types
+        .iter()
+        .find(|item| item.id == creation_type_id)
+        .and_then(|item| item.unified_creation_spec.as_ref())
+        .map(|spec| u64::from(spec.mud_point_cost))
+        .filter(|cost| *cost > 0)
+        .unwrap_or(fallback_cost)
+}
+
+pub(crate) async fn resolve_creation_entry_mud_point_cost(
+    state: &AppState,
+    creation_type_id: &str,
+    fallback_cost: u64,
+) -> u64 {
+    match state.get_creation_entry_config().await {
+        Ok(config) => resolve_creation_entry_mud_point_cost_from_config(
+            &config,
+            creation_type_id,
+            fallback_cost,
+        ),
+        Err(error) => {
+            tracing::warn!(
+                creation_type_id,
+                fallback_cost,
+                error = %error,
+                "读取创作入口泥点成本失败，回退到代码默认值"
+            );
+            fallback_cost
+        }
+    }
+}
+
 fn creation_entry_error_response(request_context: &RequestContext, error: AppError) -> Response {
     error.into_response_with_context(Some(request_context))
 }
@@ -170,6 +208,7 @@ pub(crate) fn test_creation_entry_config_response() -> CreationEntryConfigRespon
 #[cfg(test)]
 mod tests {
     use super::*;
+    use shared_contracts::creation_entry_config::DEFAULT_UNIFIED_CREATION_MUD_POINT_COST;
 
     #[test]
     fn resolves_new_creation_paths_to_creation_type_ids() {
@@ -258,6 +297,50 @@ mod tests {
         assert_eq!(resolve_creation_entry_route_id("/healthz"), None);
     }
 
+    #[test]
+    fn resolves_mud_point_cost_from_unified_creation_spec() {
+        let mut config = test_creation_entry_config_response();
+        let puzzle = config
+            .creation_types
+            .iter_mut()
+            .find(|item| item.id == "puzzle")
+            .expect("puzzle config should exist");
+        let spec = puzzle
+            .unified_creation_spec
+            .as_mut()
+            .expect("puzzle unified spec should exist");
+        spec.mud_point_cost = 8;
+
+        assert_eq!(
+            resolve_creation_entry_mud_point_cost_from_config(&config, "puzzle", 2),
+            8,
+        );
+    }
+
+    #[test]
+    fn resolves_mud_point_cost_with_fallback_for_legacy_config() {
+        let mut config = test_creation_entry_config_response();
+        let puzzle = config
+            .creation_types
+            .iter_mut()
+            .find(|item| item.id == "puzzle")
+            .expect("puzzle config should exist");
+        puzzle.unified_creation_spec = None;
+
+        assert_eq!(
+            resolve_creation_entry_mud_point_cost_from_config(&config, "puzzle", 2),
+            2,
+        );
+        assert_eq!(
+            resolve_creation_entry_mud_point_cost_from_config(
+                &config,
+                "missing-play",
+                u64::from(DEFAULT_UNIFIED_CREATION_MUD_POINT_COST),
+            ),
+            u64::from(DEFAULT_UNIFIED_CREATION_MUD_POINT_COST),
+        );
+    }
+
     #[test]
     fn test_creation_entry_config_response_opens_bark_battle() {
         let config = test_creation_entry_config_response();