fix: open chat for annotation edits

components/canvas/CanvasChatPanel.tsx

@@ -3598,8 +3598,14 @@ export function CanvasChatPanel({
       nodeId?: string;
       label?: string;
     };
+    type PendingCanvasAgentAnnotationEditRequest = {
+      nodeId?: string;
+      title?: string;
+      annotationCount?: number;
+    };
     const targetWindow = window as Window & {
       __canvasAgentPendingSlotFillRequest?: PendingCanvasAgentSlotFillRequest;
+      __canvasAgentPendingAnnotationEditRequest?: PendingCanvasAgentAnnotationEditRequest;
     };
 
     const focusComposerWithPrompt = (prompt: string) => {
@@ -3645,6 +3651,10 @@ export function CanvasChatPanel({
           annotationCount?: number;
         }>
       ).detail;
+      const pending = targetWindow.__canvasAgentPendingAnnotationEditRequest;
+      if (!pending?.nodeId || pending.nodeId === detail?.nodeId) {
+        delete targetWindow.__canvasAgentPendingAnnotationEditRequest;
+      }
       const nodeId = String(detail?.nodeId || "").trim();
       if (nodeId) {
         pendingCanvasAgentAnnotationEditTargetRef.current = {
@@ -3679,6 +3689,15 @@ export function CanvasChatPanel({
         })
       );
     }
+    const pendingAnnotationEditRequest =
+      targetWindow.__canvasAgentPendingAnnotationEditRequest;
+    if (pendingAnnotationEditRequest) {
+      handleAgentAnnotationEditRequest(
+        new CustomEvent("canvas-agent-annotation-edit-request", {
+          detail: pendingAnnotationEditRequest,
+        })
+      );
+    }
     return () => {
       window.removeEventListener(
         "canvas-agent-slot-fill-request",

components/canvas/nodes/ImageNode.tsx

@@ -6680,16 +6680,30 @@ export function ImageNode({
       return;
     }
 
+    const detail = {
+      nodeId: node.id,
+      title: displayTitle,
+      annotationCount: canvasAgentAnnotations.length,
+    };
+    const targetWindow = window as Window & {
+      __canvasAgentPendingAnnotationEditRequest?: typeof detail;
+    };
+
     selectNode(node.id, false);
-    window.dispatchEvent(
-      new CustomEvent("canvas-agent-annotation-edit-request", {
+    targetWindow.__canvasAgentPendingAnnotationEditRequest = detail;
+    targetWindow.dispatchEvent(
+      new CustomEvent("canvas-open-chat-panel-request", {
         detail: {
-          nodeId: node.id,
-          title: displayTitle,
-          annotationCount: canvasAgentAnnotations.length,
+          reason: "agent-annotation-edit",
+          nodeId: detail.nodeId,
         },
       })
     );
+    targetWindow.dispatchEvent(
+      new CustomEvent("canvas-agent-annotation-edit-request", {
+        detail,
+      })
+    );
   }, [
     canvasAgentAnnotations.length,
     displayTitle,

docs/无限画布对话框Agent模式升级开发文档-借鉴Cowart-2026-06-22.md

@@ -1388,6 +1388,7 @@ metadata: {
 2. 将 annotations 放入 `CanvasAgentContext`。
 3. 自动在输入框插入一句：“按这张图上的批注修改”。
 4. 用户可直接发送，也可补充文字。
+5. 若右侧对话面板关闭或 lazy 未挂载，需要先展开对话框，并缓存一次 pending annotation edit request，确保 prompt 与目标图不丢。
 
 ### 10.3 Agent 规则
 
@@ -1621,6 +1622,7 @@ lib/ai/runtime/middlewares/canvas-agent-clarification-gate.ts
 - 图片节点 metadata 支持 annotations
 - 图片节点 UI 支持添加文本批注/框选批注
 - `CanvasAgentContext` 输出 annotations
+- “按批注修改”会展开对话框并在面板未挂载时保留 pending request
 - Agent prompt 加入标注编辑规则
 - 编辑结果使用 `append_revision`