收口微信领域能力

将 api-server 微信 HTTP/BFF 适配统一迁移到 wechat 目录。

将微信支付和虚拟支付消息协议细节下沉到 platform-wechat。

拆分 platform-wechat 的订阅消息与支付模块并补齐依赖。

修正微信相关测试的用户 ID 夹具并同步后端架构文档。

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

@@ -35,7 +35,7 @@ use crate::{
     prompt::visual_novel as vn_prompt,
     request_context::RequestContext,
     state::AppState,
-    wechat_subscribe_message::{
+    wechat::subscribe_message::{
         GenerationResultSubscribeMessage, GenerationResultSubscribeMessageStatus,
         send_generation_result_subscribe_message_after_completion,
     },
@@ -1748,12 +1748,15 @@ async fn compile_visual_novel_session_inner(
     );
     let projection = project_draft_for_work(&draft, &profile_id)?;
     let notification_work_name = projection.work_title.clone();
-    let generation_points_cost = crate::creation_entry_config::resolve_creation_entry_mud_point_cost(
-        state,
-        VISUAL_NOVEL_RUNTIME_KIND,
-        u64::from(shared_contracts::creation_entry_config::DEFAULT_UNIFIED_CREATION_MUD_POINT_COST),
-    )
-    .await;
+    let generation_points_cost =
+        crate::creation_entry_config::resolve_creation_entry_mud_point_cost(
+            state,
+            VISUAL_NOVEL_RUNTIME_KIND,
+            u64::from(
+                shared_contracts::creation_entry_config::DEFAULT_UNIFIED_CREATION_MUD_POINT_COST,
+            ),
+        )
+        .await;
     let author = resolve_work_author_by_user_id(state, &owner_user_id, None, None);
     let compile_result = state
         .spacetime_client()
@@ -1770,9 +1773,7 @@ async fn compile_visual_novel_session_inner(
             compiled_at_micros: current_utc_micros(),
         })
         .await
-        .map_err(|error| {
-            visual_novel_error_response(request_context, map_spacetime_error(error))
-        });
+        .map_err(|error| visual_novel_error_response(request_context, map_spacetime_error(error)));
     let compiled_session = match compile_result {
         Ok(session) => {
             send_generation_result_subscribe_message_after_completion(