删除孤立的策划 GDD 模型模块

移除已无调用方的 planning_gdd_model.rs 及模块导出

删除仅依赖退役提交错误类型的无效判定函数

apps/ai-game-creator-shell/src-tauri/src/agent/runtime_driver/main_loop.rs

@@ -78,12 +78,6 @@ pub(super) fn game_creator_agent_final_reply_error_allows_fallback(error: &str)
     matches!(kind.as_str(), "empty-response" | "deserialize")
 }
 
-/// 这些错误只描述本次 Provider input 或候选 GDD；真正的 session CAS 冲突不在
-/// 此列——那说明 durable session 已被推进或损坏，必须 reconcile。
-fn plan_submit_error_is_business_rejection(error: &PlanningStorageError) -> bool {
-    matches!(error.code(), "PLAN_INVALID_REQUEST" | "PLAN_SIZE_LIMIT")
-}
-
 const AGENT_RUNTIME_PLAN_UPDATE_IDLE_LIMIT: u32 = 4;
 
 /// 最终回复被收束门禁拦下后 run 会原地续跑重试。多数 blocker 是模型自己能解的

apps/ai-game-creator-shell/src-tauri/src/agent/runtime_protocol.rs

@@ -7,7 +7,6 @@ mod design_session;
 mod finalization;
 mod json_sidecar;
 mod models;
-mod planning_gdd_model;
 mod provider_control;
 mod provider_retry;
 mod real_e2e_checkpoint;
@@ -22,7 +21,6 @@ pub(crate) use design_session::*;
 pub(in crate::agent) use finalization::*;
 pub(in crate::agent) use json_sidecar::*;
 pub(in crate::agent) use models::*;
-pub(crate) use planning_gdd_model::*;
 pub(in crate::agent) use provider_control::*;
 pub(in crate::agent) use provider_retry::*;
 pub(in crate::agent) use real_e2e_checkpoint::*;