feat: v2.3.0 流式输出 + 日志系统 + 会议室架构全面升级

- 流式输出: SSE 逐 token 接收, \\n\n\ 段落缓冲后 mdprint 彩色渲染
- 日志系统: charmbracelet/log v2 双写(stderr + log.yml), yunshu log 命令
- 会议室架构: dialog(main) + weather/profile/note(sub) 多 Agent 编排
- 泛型工具注册: NewTool[T] 反射推导 JSON Schema, 类型安全
- 安全加固: safeMemoryPath 三段校验(EvalSymlinks+Rel), maxToolCalls=2
- 性能优化: sync.Once 延迟加载, note 一步完成, obs/summary 合并
- Prompt 适配: 流式输出原则(先调工具不说话), 单 Agent 查询跳过 obs+summary
- 文档: AGENTS.md + architecture.md + changelog.md 全部同步至 v2.3.0

registry.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type AgentRegistry struct {
+	mains map[string]*AgentDef
+	subs  map[string]*AgentDef
+}
+
+func ScanAgents() *AgentRegistry {
+	r := &AgentRegistry{
+		mains: make(map[string]*AgentDef),
+		subs:  make(map[string]*AgentDef),
+	}
+
+	dirs := []string{
+		"agents",
+		filepath.Join(ConfigDir(), "agents"),
+	}
+
+	seen := make(map[string]bool)
+
+	for _, dir := range dirs {
+		entries, err := os.ReadDir(dir)
+		if err != nil {
+			continue
+		}
+		for _, e := range entries {
+			if e.IsDir() || !strings.HasSuffix(e.Name(), ".md") || seen[e.Name()] {
+				continue
+			}
+			seen[e.Name()] = true
+
+			agentPath := filepath.Join(dir, e.Name())
+			def, err := LoadAgent(agentPath)
+			if err != nil {
+				warnLog("跳过 agent", "file", e.Name(), "err", err)
+				continue
+			}
+
+			switch def.Type {
+			case "main":
+				r.mains[def.Name] = def
+			case "sub":
+				r.subs[def.Name] = def
+			}
+		}
+	}
+
+	return r
+}
+
+func (r *AgentRegistry) GetMain(name string) *AgentDef {
+	return r.mains[name]
+}
+
+func (r *AgentRegistry) GetSub(name string) *AgentDef {
+	return r.subs[name]
+}
+
+func (r *AgentRegistry) ListMains() []*AgentDef {
+	list := make([]*AgentDef, 0, len(r.mains))
+	for _, def := range r.mains {
+		list = append(list, def)
+	}
+	return list
+}
+
+func (r *AgentRegistry) ListSubs() []*AgentDef {
+	list := make([]*AgentDef, 0, len(r.subs))
+	for _, def := range r.subs {
+		list = append(list, def)
+	}
+	return list
+}
+
+func (r *AgentRegistry) String() string {
+	var b strings.Builder
+	b.WriteString(fmt.Sprintf("mains: %d, subs: %d\n", len(r.mains), len(r.subs)))
+	for _, def := range r.mains {
+		b.WriteString(fmt.Sprintf("  [main] %s: %s\n", def.Name, def.Description))
+	}
+	for _, def := range r.subs {
+		b.WriteString(fmt.Sprintf("  [sub]  %s: %s\n", def.Name, def.Description))
+	}
+	return b.String()
+}