修复: DeepSeek reasoning_content 全链路透传(跨6 crate补字段+映射+agentic loop累积回传)

src-tauri/src/commands/ai/stream_recv.rs

@@ -101,6 +101,8 @@ pub(crate) enum StreamResult {
         text: String,
         tool_calls: HashMap<u32, ToolCallDraft>,
         usage: df_ai::provider::TokenUsage,
+        /// DeepSeek thinking 模式推理内容（需回传到下一轮请求）
+        reasoning_content: Option<String>,
     },
     /// 流中途断（MidStream chunk Err / idle timeout / provider stream-error / 有 partial_text
     /// 但流尽未收到 finished）。已 emit 过 AiTextDelta（前端 currentText 已累积），
@@ -110,6 +112,8 @@ pub(crate) enum StreamResult {
         text: String,
         tool_calls: HashMap<u32, ToolCallDraft>,
         usage: df_ai::provider::TokenUsage,
+        /// DeepSeek thinking 模式推理内容（部分累积）
+        reasoning_content: Option<String>,
     },
     /// Init 失败（provider.stream() Err：建连/鉴权/HTTP non-2xx）。已 emit AiError。
     /// `retryable`: 据状态码分类(retry::is_status_retryable 镜像)：true=5xx/429/timeout/connect
@@ -154,6 +158,8 @@ pub(crate) async fn stream_llm(
             let mut finished_received = false;
             let mut stopped = false;
             let mut final_usage: Option<df_ai::provider::TokenUsage> = None;
+            // BUG-260617-12: DeepSeek thinking 模式推理内容累积（多轮需回传）
+            let mut reasoning_content_acc: Option<String> = None;
 
             // B-260615-15:heartbeat interval 提至 loop 外复用,避免每轮重建计时器
             // (每轮重建会丢已积累的节拍,且 interval 首次 tick 立即返回的特性会被误用)。
@@ -208,6 +214,7 @@ pub(crate) async fn stream_llm(
                                     text: full_text,
                                     tool_calls: tool_calls_acc,
                                     usage: final_usage.unwrap_or_default(),
+                                    reasoning_content: reasoning_content_acc,
                                 };
                             }
                             Ok(None) => break, // 流正常结束
@@ -231,6 +238,10 @@ pub(crate) async fn stream_llm(
                                     if let Some(u) = &chunk.usage {
                                         final_usage = Some(u.clone());
                                     }
+                                    // BUG-260617-12: DeepSeek thinking 模式推理内容累积
+                                    if let Some(ref rc) = chunk.reasoning_content {
+                                        reasoning_content_acc.get_or_insert_with(String::new).push_str(rc);
+                                    }
                                     // provider 流式错误事件（Anthropic SSE `type=="error"` 等）：
                                     // UX-2025-04 / CR-30-2 / 决策 a1: MidStream 类失败——已有文本则保文(Partial),
                                     // 不重试。空文本无文可保,emit AiError + InitFailed(保守 retryable=true,
@@ -260,6 +271,7 @@ pub(crate) async fn stream_llm(
                                             text: full_text,
                                             tool_calls: tool_calls_acc,
                                             usage: final_usage.unwrap_or_default(),
+                                            reasoning_content: reasoning_content_acc,
                                         };
                                     }
                                     if chunk.finished {
@@ -301,6 +313,7 @@ pub(crate) async fn stream_llm(
                                         text: full_text,
                                         tool_calls: tool_calls_acc,
                                         usage: final_usage.unwrap_or_default(),
+                                        reasoning_content: reasoning_content_acc,
                                     };
                                 }
                             }
@@ -333,6 +346,7 @@ pub(crate) async fn stream_llm(
                     text: full_text,
                     tool_calls: tool_calls_acc,
                     usage: final_usage.unwrap_or_default(),
+                    reasoning_content: reasoning_content_acc,
                 };
             }
 
@@ -358,6 +372,7 @@ pub(crate) async fn stream_llm(
                     text: full_text,
                     tool_calls: tool_calls_acc,
                     usage: final_usage.unwrap_or_default(),
+                    reasoning_content: reasoning_content_acc,
                 };
             }
 
@@ -366,6 +381,7 @@ pub(crate) async fn stream_llm(
                 text: full_text,
                 tool_calls: tool_calls_acc,
                 usage: final_usage.unwrap_or_default(),
+                reasoning_content: reasoning_content_acc,
             }
         }
         Err(e) => {