fix: doc_query chronological insert, register cli/webui output channels

- context.go: add InsertByTimestamp for chronological context insertion
- toolcall.go: doc_query uses InsertByTimestamp instead of Append
- agent_tools_test.go: update tests to use payload/type keys
- cli/plugin.go: register output_send__cli channel
- webui/plugin.go: register output_send__webui channel

internal/agent/core/agent_tools_test.go

@@ -62,7 +62,8 @@ func TestExecuteOutputSendTool(t *testing.T) {
 
 	a := &Agent{io: io}
 	tc := agentAPI.ToolCall{Name: "output_send__screen", Arguments: map[string]interface{}{
-		"content": `{"content":"hello world"}`,
+		"payload": "hello world",
+		"type":    "text",
 	}}
 	result := a.executeOutputSendTool(tc)
 	if !strings.Contains(result, "screen") {
@@ -84,7 +85,8 @@ func TestExecuteOutputSendToolChannelNotExist(t *testing.T) {
 	io := agentIO.NewIOManager()
 	a := &Agent{io: io}
 	tc := agentAPI.ToolCall{Name: "output_send__nonexistent", Arguments: map[string]interface{}{
-		"content": "hello",
+		"payload": "hello",
+		"type":    "text",
 	}}
 	result := a.executeOutputSendTool(tc)
 	if !strings.Contains(result, "不存在") && !strings.Contains(result, "不可用") {
@@ -101,7 +103,8 @@ func TestExecuteOutputSendToolNoTextCap(t *testing.T) {
 
 	a := &Agent{io: io}
 	tc := agentAPI.ToolCall{Name: "output_send__camera", Arguments: map[string]interface{}{
-		"content": "hello",
+		"payload": "hello",
+		"type":    "text",
 	}}
 	result := a.executeOutputSendTool(tc)
 	if strings.Contains(result, "已通过") {

internal/agent/core/context.go

@@ -139,6 +139,23 @@ func (c *RelevanceContext) Append(evt ContextEvent) {
 	c.save()
 }
 
+func (c *RelevanceContext) InsertByTimestamp(evt ContextEvent) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	evt.Vector = c.computeVector(&evt)
+
+	idx := sort.Search(len(c.events), func(i int) bool {
+		return c.events[i].Timestamp.After(evt.Timestamp)
+	})
+
+	c.events = append(c.events, nil)
+	copy(c.events[idx+1:], c.events[idx:])
+	c.events[idx] = &evt
+
+	c.save()
+}
+
 func (c *RelevanceContext) save() error {
 	if c.savePath == "" {
 		return nil

internal/agent/core/toolcall.go

@@ -503,7 +503,7 @@ func (a *Agent) executeDocTool(tc agentAPI.ToolCall) string {
 			if len(content) > 2000 {
 				content = content[:2000] + "..."
 			}
-			a.context.Append(ContextEvent{
+			a.context.InsertByTimestamp(ContextEvent{
 				Timestamp: d.CreatedAt,
 				Source:    "cold_storage",
 				Input:     fmt.Sprintf("加载文档记忆: %s", query),