fix: return real message id from chat_send so editing fresh messages works

apps/desktop/src/commands.rs

@@ -458,12 +458,12 @@ pub async fn chat_send(
     app: AppHandle,
     state: State<'_, App>,
     payload: ChatSendPayload,
-) -> Result<(), String> {
+) -> Result<serde_json::Value, String> {
     let core = state.core.clone();
     let engine = state.engine.clone();
     let base = state.engine_base.clone();
 
-    let (history, model, engine_bin) = {
+    let (history, model, engine_bin, user_message_id) = {
         let db = core.db.lock().unwrap();
         if sessions_db::get_conversation(&db, &payload.conversation_id)
             .map_err(|e| e.to_string())?
@@ -479,7 +479,7 @@ pub async fn chat_send(
             )
             .map_err(|e| e.to_string())?;
         }
-        sessions_db::add_message(
+        let user_message_id = sessions_db::add_message(
             &db,
             &payload.conversation_id,
             "user",
@@ -508,7 +508,7 @@ pub async fn chat_send(
         let bin = settings_db::get(&db, "engine_bin")
             .map_err(|e| e.to_string())?
             .unwrap_or_default();
-        (history, model, bin)
+        (history, model, bin, user_message_id)
     };
 
     let conversation_id = payload.conversation_id.clone();
@@ -523,13 +523,16 @@ pub async fn chat_send(
         core,
         engine,
         base,
-        conversation_id,
+        conversation_id.clone(),
         history,
         model,
         engine_bin,
         payload.params,
     ));
-    Ok(())
+    Ok(serde_json::json!({
+        "conversation_id": conversation_id,
+        "message_id": user_message_id,
+    }))
 }
 
 /// 统一的生成与流式转发：支持本地引擎 / 远程 API，统计首字延迟、token 数与耗时。