feat: 支持智能体文档附件与轻量读取

- 建立文档上传、异步读取、对象存储、补偿与聊天绑定闭环

- 按智能体 20K 上下文预算选择文档片段并保留稳定引用

- 统一聊天文件卡片、类型图标、草稿恢复与可靠下载

easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.ts

@@ -51,10 +51,13 @@ function resolveToolName(
   if (isSafeToolName(resource?.name)) {
     return String(resource?.name);
   }
-  return buildFallbackToolName(
-    kind === 'workflow' ? 'workflow' : kind === 'mcp' ? 'mcp' : 'plugin',
-    resource,
-  );
+  let prefix = 'plugin';
+  if (kind === 'workflow') {
+    prefix = 'workflow';
+  } else if (kind === 'mcp') {
+    prefix = 'mcp';
+  }
+  return buildFallbackToolName(prefix, resource);
 }
 
 function normalizeBindingToolName(binding: AgentToolBinding) {
@@ -66,8 +69,8 @@ function normalizeBindingToolName(binding: AgentToolBinding) {
   }
   const kind = toolKindFromType(binding.toolType);
   const resource = {
-    ...(binding.resourceSnapshot || {}),
-    ...(binding.resourceSummary || {}),
+    ...binding.resourceSnapshot,
+    ...binding.resourceSummary,
     id:
       binding.targetId ||
       binding.resourceSummary?.id ||
@@ -90,6 +93,9 @@ export function createEmptyAgent(): AgentInfo {
     description: '',
     avatar: '',
     categoryId: '',
+    executionConfigJson: {
+      documentContextBudgetTokens: 20_000,
+    },
     modelId: '',
     promptConfigJson: { systemPrompt: '' },
     generationConfigJson: { stream: true },
@@ -124,6 +130,13 @@ function normalizeAgent(agent?: AgentInfo): AgentInfo {
       ...source.generationConfigJson,
       stream: source.generationConfigJson?.stream !== false,
     },
+    executionConfigJson: {
+      ...source.executionConfigJson,
+      documentContextBudgetTokens:
+        Number(source.executionConfigJson?.documentContextBudgetTokens) > 0
+          ? Number(source.executionConfigJson?.documentContextBudgetTokens)
+          : 20_000,
+    },
     memoryConfigJson: {
       ...memoryConfig,
       compressionParameter: {
@@ -166,7 +179,7 @@ function normalizeToolBinding(
   index: number,
 ): AgentToolBinding {
   const optionsJson = {
-    ...(binding.optionsJson || {}),
+    ...binding.optionsJson,
   };
   if (String(optionsJson.executionMode || '').toUpperCase() !== 'ASYNC') {
     optionsJson.executionMode = 'SYNC';
@@ -269,16 +282,17 @@ export function useAgentDesignerState() {
     kind: Exclude<AgentCapabilityKind, 'knowledge'>,
     resource?: Record<string, any>,
   ) {
-    const toolType =
-      kind === 'workflow' ? 'WORKFLOW' : kind === 'mcp' ? 'MCP' : 'PLUGIN';
+    let toolType = 'PLUGIN';
+    if (kind === 'workflow') {
+      toolType = 'WORKFLOW';
+    } else if (kind === 'mcp') {
+      toolType = 'MCP';
+    }
+    const targetId = resource?.mcpId || resource?.id;
     const binding = normalizeToolBinding(
       {
         toolType,
-        targetId: resource?.mcpId
-          ? String(resource.mcpId)
-          : resource?.id
-            ? String(resource.id)
-            : '',
+        targetId: targetId ? String(targetId) : '',
         toolName: kind === 'mcp' ? '' : resolveToolName(kind, resource),
         resourceSummary: resource || {},
       },
@@ -373,6 +387,17 @@ export function useAgentDesignerState() {
         ...state.agent.generationConfigJson,
         stream: state.agent.generationConfigJson?.stream !== false,
       },
+      executionConfigJson: {
+        ...state.agent.executionConfigJson,
+        documentContextBudgetTokens: Math.max(
+          1,
+          Math.trunc(
+            Number(
+              state.agent.executionConfigJson?.documentContextBudgetTokens,
+            ) || 20_000,
+          ),
+        ),
+      },
       memoryConfigJson: {
         ...restMemoryConfigJson,
         compressionParameter: {