feat(*): 云端 Agent - 增强画布上下文读取并接入 Gemini 缓存

web/src/pages/canvas/project.tsx

@@ -468,6 +468,11 @@ function InfiniteCanvasPage() {
         const ids = nodeId ? [nodeId] : Array.from(selectedNodeIdsRef.current);
         const references = ids.map((id) => agentMentionReferences.find((reference) => reference.nodeId === id)).filter((reference): reference is CanvasResourceReference => Boolean(reference));
         if (!references.length) return;
+        if (nodeId && !selectedNodeIdsRef.current.has(nodeId)) {
+            const selection = new Set([nodeId]);
+            selectedNodeIdsRef.current = selection;
+            setSelectedNodeIds(selection);
+        }
         setAgentPrefillPrompt(`${references.map(canvasResourceMentionToken).join(" ")} `);
         openAgent();
         setContextMenu(null);
@@ -2822,7 +2827,7 @@ function InfiniteCanvasPage() {
                             </div>
 
                             <div className={versions.open ? "hidden" : "contents"}>
-                            <CanvasCloudAgentPanel canvasId={projectId} domainProjectId={currentProject?.projectId} nodeCount={nodes.length} references={agentMentionReferences} prefillPrompt={agentPrefillPrompt} open={assistantOpen} onOpen={openAgent} onCollapse={closeAgent} onFocusNode={(nodeId) => {
+                            <CanvasCloudAgentPanel canvasId={projectId} domainProjectId={currentProject?.projectId} nodeCount={nodes.length} selectedNodeIds={Array.from(selectedNodeIds)} references={agentMentionReferences} prefillPrompt={agentPrefillPrompt} open={assistantOpen} onOpen={openAgent} onCollapse={closeAgent} onFocusNode={(nodeId) => {
                                 if (!nodesRef.current.some((node) => node.id === nodeId)) { message.info("该节点已删除或尚未同步到画布"); return; }
                                 focusCanvasNode(nodeId);
                             }} />