Agent-System-Backend/internal/server/server.go

// Package server 提供 HTTP/SSE API 与内嵌前端（go:embed）。
// API-first：前端只是第一个客户端；全部能力走公开 API。
package server

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"io/fs"
	"mime"
	"net/http"
	"net/url"
	"os"
	"path/filepath"
	"sort"
	"strconv"
	"strings"
	"time"

	agentcommand "agent-command"
	"agent-system-backend/internal/cardsvc"
	"agent-system-backend/internal/cmdbus"
	"agent-system-backend/internal/ingest"
	"agent-system-backend/internal/intentgate"
	"agent-system-backend/internal/plugins"
	"agent-system-backend/internal/profiles"
	"agent-system-backend/internal/prompts"
	"agent-system-backend/internal/ratelimit"
	"agent-system-backend/internal/route"
	"agent-system-backend/internal/runmgr"
	"agent-system-backend/internal/settings"
	"agent-system-backend/internal/store"
	"agent-system-backend/internal/surfacesvc"
	"agent-system-backend/internal/tools"
	"agent-system-backend/internal/workflow"
	"agent-system-backend/pkg/extension"
	"agent-system-backend/web"
	core "agent-system-core"
)

type Server struct {
	st          *store.Store
	Auth        *Authenticator       // API key 认证（nil/未启用 = 默认租户；组合根注入）
	Retriever   core.Retriever       // 混合检索（nil = store 全文；组合根注入）
	Indexer     core.DocumentIndexer // 检索索引入口（nil = 整文档单块；组合根注入）
	Limiter     ratelimit.Limiter    // 租户限流（nil = 不限；组合根注入）
	LimitLookup func() int           // 当前限流值（次/分；<=0 不限；组合根缓存注入）
	mgr         *runmgr.Manager
	Cards       *cardsvc.Service    // 收件箱任务卡（nil = 不启用；组合根注入）
	Surfaces    *surfacesvc.Service // Generative UI Surface（nil = 不启用；EXT-17）
	Bus         *cmdbus.Bus         // 命令总线（nil = 不启用；组合根注入；四入口同源 D27）
	Gate        NLIntentGate        // 意图闸门（chat 入口同源判定；nil = 不接）
	Workflows   *workflow.Registry  // 已装载工作流（nil = 不接）
	Prompts     *prompts.Service    // 提示词库（nil = 不启用 API 与技能命令；执行器另有回退）
	reg         *tools.Registry
	prof        *profiles.Service
	set         *settings.Service
	plugins     *plugins.Host
	static      fs.FS
	// Subscribe 注入 bus 订阅（事件在线转发；重放走 store 游标）。
	Subscribe func(conversationID string) (<-chan core.StreamEvent, func())
	// DisableUploadIndexing EXT-9：true 时上传端点不再自动写检索索引（原件与
	// 摄取卡行为不变）；组合根自 extension.Options 注入，零值=false=现状。
	DisableUploadIndexing bool
	// ProjectAuthz EXT-8 资源授权适配器（组合根注入；nil=未注册，读取入口
	// owner 自有判定未命中即 NotFound——与未扩展基座行为一致）。
	ProjectAuthz func(owner string, projectID core.ID) (bool, error)
	// ProjectAuthzActions 动作级授权适配器（协作存储 U3，KTD13）：注册后对
	// 全部动作权威；未注册时 read 回落 ProjectAuthz（兼容），其余动作一律
	// 默认拒绝——旧只读适配器不得自动获得写入能力。公开契约的版本化扩展
	// 计划见 docs/guides/team-storage.md（KTD13 一节）。
	ProjectAuthzActions func(owner string, projectID core.ID, action ProjectAction) (bool, error)
	// CompiledPlugins 编译进二进制的进程内插件摘要（组合根在 applyCompiled
	// 期间记录注册面生成；nil/空 = 无编译插件，清单行为不变）。
	CompiledPlugins []CompiledPlugin
}

// ProjectAction 项目资源的动作授权矩阵（KTD13）。共享可读不等于可写或可
// 批准：动作语义独立判定，未配置的动作默认拒绝。
type ProjectAction string

const (
	ProjectRead    ProjectAction = "read"    // 读取项目资源（会话/消息/检索/工件下载）
	ProjectEdit    ProjectAction = "edit"    // 写入与修改（会话内发消息、卡片裁决、设置变更）
	ProjectApprove ProjectAction = "approve" // 审批（HITL 确认、命令确认）
	ProjectExecute ProjectAction = "execute" // 触发执行（run、工具、工作流）
	ProjectAdmin   ProjectAction = "admin"   // 管理（成员、共享范围、销毁性操作）
)

// SetProjectAuthorizer 组合根在装载扩展后注入 EXT-8 适配器。
func (s *Server) SetProjectAuthorizer(fn func(owner string, projectID core.ID) (bool, error)) {
	s.ProjectAuthz = fn
}

// SetProjectActionAuthorizer 组合根注入 KTD13 动作级适配器（版本化公开契约
// 扩展落地前，宿主侧先以本槽位提供矩阵语义）。
func (s *Server) SetProjectActionAuthorizer(fn func(owner string, projectID core.ID, action ProjectAction) (bool, error)) {
	s.ProjectAuthzActions = fn
}

// authorizeProjectAction 动作矩阵唯一判定（KTD13）：
//   - action-aware 适配器已注册 → 权威（出错/拒绝一律 false，fail-closed）；
//   - 未注册 → read 回落旧只读 ProjectAuthz（兼容 EXT-8 现网），其余动作
//     默认拒绝（旧适配器不得自动获得写入能力）。
func (s *Server) authorizeProjectAction(owner string, projectID core.ID, action ProjectAction) bool {
	if s.ProjectAuthzActions != nil {
		ok, err := s.ProjectAuthzActions(owner, projectID, action)
		return err == nil && ok
	}
	if action == ProjectRead {
		return s.authorizeSharedProject(owner, projectID)
	}
	return false
}

// authorizeSharedProject 读取路径的共享判定：适配器未注册或拒绝/出错一律 false
// （fail-closed；错误不区分，避免泄露存在性）。
func (s *Server) authorizeSharedProject(owner string, projectID core.ID) bool {
	if s.ProjectAuthz == nil {
		return false
	}
	ok, err := s.ProjectAuthz(owner, projectID)
	return err == nil && ok
}

func New(st *store.Store, mgr *runmgr.Manager, reg *tools.Registry, p *profiles.Service, s *settings.Service, ph *plugins.Host) *Server {
	sub, err := web.Dist()
	if err != nil {
		panic(err) // embed 布局错误属构建期问题
	}
	return &Server{st: st, mgr: mgr, reg: reg, prof: p, set: s, plugins: ph, static: sub}
}

// NLIntentGate 意图闸门端口（intentgate.Gate 实现；避免包依赖方向反转）。
type NLIntentGate interface {
	Match(ctx context.Context, input string) (string, string)
}

type intentRecognizer interface {
	Recognize(ctx context.Context, input string) intentgate.MatchResult
}

func (s *Server) recognize(ctx context.Context, text string) intentgate.MatchResult {
	if rg, ok := s.Gate.(intentRecognizer); ok {
		return rg.Recognize(ctx, text)
	}
	branch, id := s.Gate.Match(ctx, text)
	return intentgate.MatchResult{Branch: branch, ID: id}
}

// WireBuiltinCommands 注册内置命令（`/` 菜单全清单的数据源；处理器为宿主用例适配）。
// 响应保持既有 {command, ...} 契约（frontend store.sendMessage 按此消费）。
func (s *Server) WireBuiltinCommands() {
	b := s.Bus
	if b == nil {
		return
	}
	must := func(err error) {
		if err != nil {
			panic("server: builtin command: " + err.Error()) // 装配期错误属编程错误
		}
	}
	must(b.RegisterBuiltin(agentcommand.CommandSpec{ID: "builtin.help", Title: "帮助", Description: "查看可用命令与入口说明"},
		"/help", func(ctx context.Context, req cmdbus.Request) (any, error) {
			return map[string]any{"reply": fmt.Sprintf("可用命令（注册表 %d 条）——/new 新会话 · /mock on|off 演示模式 · /model <名称> 设置主模型 · /profile <id> 切换画像 · /help 帮助", len(b.List()))}, nil
		}))
	must(b.RegisterBuiltin(agentcommand.CommandSpec{ID: "system.intent", Title: "意图路由",
		Description:  "G2-2 自然语言入口：文本匹配已声明意图后经命令总线分发（同审计信封）；未命中返回候选清单",
		ParamsSchema: json.RawMessage(`{"type":"object","required":["text"],"properties":{"text":{"type":"string"}}}`)},
		"/intent", func(ctx context.Context, req cmdbus.Request) (any, error) {
			text, _ := req.Params["text"].(string)
			in, ok := b.Intents().Match(text)
			if !ok {
				list := b.Intents().List()
				cands := make([]map[string]any, 0, len(list))
				for _, x := range list {
					cands = append(cands, map[string]any{"id": x.ID, "phrases": x.Phrases, "command": x.Command})
				}
				return map[string]any{"matched": false, "candidates": cands}, nil
			}
			params := map[string]any{}
			for k, v := range in.Params {
				params[k] = v
			}
			for k, v := range req.Params {
				if k != "text" {
					params[k] = v // 调用方可覆盖模板参数
				}
			}
			resp := b.Dispatch(ctx, cmdbus.Request{ID: in.Command, Params: params, Entrance: "chat",
				Actor: req.Actor, Owner: req.Owner, ConversationID: req.ConversationID})
			return map[string]any{"matched": true, "intent": in.ID, "command": in.Command,
				"receipt": resp.Receipt, "payload": resp.Payload}, nil
		}))
	must(b.RegisterBuiltin(agentcommand.CommandSpec{ID: "conversation.create", Title: "新建会话", Description: "在当前项目下新建会话",
		ParamsSchema: json.RawMessage(`{"type":"object","properties":{"title":{"type":"string"}}}`)},
		"/new", func(ctx context.Context, req cmdbus.Request) (any, error) {
			conv, err := s.st.GetConversation(req.Owner, req.ConversationID)
			if err != nil {
				return nil, err
			}
			c, err := s.st.CreateConversation(conv.Owner, conv.ProjectID, "新会话", conv.ProfileID)
			if err != nil {
				return nil, err
			}
			return map[string]any{"conversation": c}, nil
		}))
	must(b.RegisterBuiltin(agentcommand.CommandSpec{ID: "runtime.mock", Title: "演示模式", Description: "切换 mock 演示模式（on|off）",
		ParamsSchema: json.RawMessage(`{"type":"object","required":["on"],"properties":{"on":{"type":"boolean"}}}`)},
		"/mock", func(ctx context.Context, req cmdbus.Request) (any, error) {
			on, _ := req.Params["on"].(bool)
			if err := s.set.MergeUser(req.Owner, map[string]any{"runtime": map[string]any{"mock": on}}); err != nil {
				return nil, err
			}
			return map[string]any{"runtime.mock": on}, nil
		}))
	must(b.RegisterBuiltin(agentcommand.CommandSpec{ID: "models.set", Title: "设置主模型", Description: "设置主模型名称",
		ParamsSchema: json.RawMessage(`{"type":"object","required":["model"],"properties":{"model":{"type":"string"}}}`)},
		"/model", func(ctx context.Context, req cmdbus.Request) (any, error) {
			m, _ := req.Params["model"].(string)
			if err := s.set.MergeUser(req.Owner, map[string]any{"models": map[string]any{"chat": map[string]any{"model": m}}}); err != nil {
				return nil, err
			}
			return map[string]any{"model": m}, nil
		}))
	must(b.RegisterBuiltin(agentcommand.CommandSpec{ID: "conversation.profile", Title: "切换画像", Description: "切换会话画像",
		ParamsSchema: json.RawMessage(`{"type":"object","required":["profileId"],"properties":{"profileId":{"type":"string"}}}`)},
		"/profile", func(ctx context.Context, req cmdbus.Request) (any, error) {
			pid, _ := req.Params["profileId"].(string)
			if err := s.st.UpdateConversation(req.Owner, req.ConversationID, "", pid); err != nil {
				return nil, err
			}
			return map[string]any{"profile": pid}, nil
		}))
}

func (s *Server) Handler() http.Handler {
	mux := http.NewServeMux()

	// ---- 认证与会话（管理员发放制，R2）----
	mux.HandleFunc("POST /api/auth/login", s.login)
	mux.HandleFunc("POST /api/auth/logout", s.logout)
	mux.HandleFunc("POST /api/auth/password", s.changePassword)
	mux.HandleFunc("GET /api/admin/users", s.listAdminUsers)
	mux.HandleFunc("POST /api/admin/users", s.createAdminUser)
	mux.HandleFunc("POST /api/admin/users/{owner}/password", s.resetAdminUserPassword)

	// ---- 项目 / 会话 ----
	mux.HandleFunc("GET /api/projects", s.listProjects)
	mux.HandleFunc("POST /api/projects", s.createProject)
	mux.HandleFunc("PATCH /api/projects/{id}", s.patchProject)
	mux.HandleFunc("DELETE /api/projects/{id}", s.deleteProject)
	mux.HandleFunc("GET /api/projects/{id}/conversations", s.listConversations)
	mux.HandleFunc("POST /api/projects/{id}/conversations", s.createConversation)
	mux.HandleFunc("GET /api/conversations", s.listTasks)
	mux.HandleFunc("GET /api/conversations/{id}", s.conversationDetail)
	mux.HandleFunc("GET /api/conversations/{id}/export", s.exportConversation)
	mux.HandleFunc("PATCH /api/conversations/{id}", s.patchConversation)
	mux.HandleFunc("DELETE /api/conversations/{id}", s.deleteConversation)
	mux.HandleFunc("POST /api/conversations/{id}/messages", s.postMessage)
	mux.HandleFunc("GET /api/conversations/{id}/checkpoints", s.listCheckpoints)
	mux.HandleFunc("POST /api/conversations/{id}/rewind", s.rewindFiles)
	mux.HandleFunc("POST /api/conversations/{id}/regenerate", s.regenerateMessage)
	mux.HandleFunc("POST /api/messages/{id}/exclude", s.excludeMessage)
	mux.HandleFunc("POST /api/messages/{id}/variant", s.selectVariant)
	mux.HandleFunc("GET /api/secrets", s.listSecrets)
	mux.HandleFunc("POST /api/secrets", s.createSecret)
	mux.HandleFunc("POST /api/secrets/{id}/activate", s.activateSecret)
	mux.HandleFunc("PATCH /api/secrets/{id}", s.renameSecret)
	mux.HandleFunc("DELETE /api/secrets/{id}", s.deleteSecret)
	mux.HandleFunc("GET /api/context-entries", s.listContextEntries)
	mux.HandleFunc("POST /api/context-entries", s.saveContextEntry)
	mux.HandleFunc("DELETE /api/context-entries/{id}", s.deleteContextEntry)
	mux.HandleFunc("GET /api/prompt-commands", s.listUserPromptCommands)
	mux.HandleFunc("POST /api/prompt-commands", s.saveUserPromptCommand)
	mux.HandleFunc("DELETE /api/prompt-commands/{id}", s.deleteUserPromptCommand)
	mux.HandleFunc("POST /api/runs/{id}/cancel", s.cancelRun)
	mux.HandleFunc("GET /api/runs/{id}", s.getRun)

	// ---- HITL ----
	mux.HandleFunc("POST /api/hitl/{id}/resolve", s.resolveHITL)

	// ---- 收件箱任务卡（提案 T2；项目收件箱 D48-D51）----
	mux.HandleFunc("GET /api/conversations/{id}/cards", s.listCards)
	mux.HandleFunc("GET /api/projects/{id}/cards", s.listProjectCards)
	mux.HandleFunc("POST /api/cards/{id}/actions/{actionId}", s.cardAction)
	mux.HandleFunc("POST /api/cards/{id}/pin", s.cardPin)
	mux.HandleFunc("POST /api/cards/{id}/dismiss", s.cardDismiss)
	mux.HandleFunc("POST /api/cards/{id}/to_project", s.cardToProject)

	// ---- 事件流（SSE）----
	mux.HandleFunc("GET /api/events", s.events)

	// ---- 上传与工件 ----
	mux.HandleFunc("POST /api/projects/{id}/uploads", s.upload)
	mux.HandleFunc("GET /api/projects/{id}/artifacts", s.listArtifacts)
	mux.HandleFunc("GET /api/artifacts/{id}", s.getArtifact)
	mux.HandleFunc("GET /api/artifacts/{id}/content", s.artifactContent)
	mux.HandleFunc("PUT /api/artifacts/{id}/content", s.putArtifactContent)
	mux.HandleFunc("DELETE /api/artifacts/{id}", s.deleteArtifact)

	// ---- 画像 / 设置 / 工具 / 插件 / 注册表 ----
	mux.HandleFunc("GET /api/profiles", s.listProfiles)
	mux.HandleFunc("POST /api/profiles", s.saveProfile)
	mux.HandleFunc("DELETE /api/profiles/{id}", s.deleteProfile)
	mux.HandleFunc("GET /api/prompts", s.listPromptModules)
	mux.HandleFunc("POST /api/prompts", s.savePromptModule)
	mux.HandleFunc("DELETE /api/prompts/{id}", s.deletePromptModule)
	mux.HandleFunc("GET /api/settings", s.getSettings)
	mux.HandleFunc("PUT /api/settings/user", s.putSettingsUser)
	mux.HandleFunc("PUT /api/settings/project/{id}", s.putSettingsProject)
	mux.HandleFunc("GET /api/tools", s.listTools)
	mux.HandleFunc("GET /api/url-preview", s.urlPreview)
	mux.HandleFunc("POST /api/tools", s.createUserTool)
	mux.HandleFunc("DELETE /api/tools/{name}", s.deleteUserTool)
	mux.HandleFunc("GET /api/plugins", s.listPlugins)
	mux.HandleFunc("POST /api/plugins/{id}/enabled", s.setPluginEnabled)
	mux.HandleFunc("POST /api/plugins/{id}/activation", s.setSurfaceActivation)
	mux.HandleFunc("POST /api/surfaces", s.submitSurface)
	mux.HandleFunc("GET /api/surfaces/{id}", s.getSurface)
	mux.HandleFunc("POST /api/surfaces/{id}/actions", s.submitSurfaceAction)
	mux.HandleFunc("GET /api/conversations/{id}/surfaces", s.listSurfaces)
	mux.HandleFunc("GET /api/projects/{id}/surfaces", s.listProjectSurfaces)
	mux.HandleFunc("POST /api/plugins/reload", s.reloadPlugins)
	mux.HandleFunc("GET /api/plugins/settings-schema", s.pluginSettingsSchema)
	mux.HandleFunc("GET /api/registry", s.registry)
	// WP3-I3/KTD4：管理区声明分区清单（编译插件经 Registry.AddAdminZone 声明；
	// 展示元数据对所有认证主体开放，分区内数据能力由组件命令面 fail-closed）。
	mux.HandleFunc("GET /api/admin-zone/sections", s.listAdminZoneSections)

	// ---- 计划 / 待办 / 命令 / 解析器 / 检索 ----
	mux.HandleFunc("GET /api/conversations/{id}/plan", s.getPlan)
	mux.HandleFunc("GET /api/conversations/{id}/todos", s.getTodos)
	mux.HandleFunc("GET /api/commands", s.listCommands)
	mux.HandleFunc("GET /api/workspaces", s.listWorkspaces)
	mux.HandleFunc("POST /api/commands/{id}", s.execCommand)
	mux.HandleFunc("GET /api/commands/audit", s.listAudits)
	mux.HandleFunc("GET /api/parsers", s.listParsers)
	mux.HandleFunc("POST /api/projects/{id}/knowledge", s.addKnowledge)
	mux.HandleFunc("GET /api/knowledge/search", s.searchKnowledge)

	mux.HandleFunc("POST /api/tasks", s.createBackgroundTask)
	mux.HandleFunc("GET /api/tasks", s.listBackgroundTasks)
	mux.HandleFunc("GET /api/tasks/{id}", s.getBackgroundTask)
	mux.HandleFunc("POST /api/tasks/{id}", s.updateBackgroundTask)
	mux.HandleFunc("POST /api/memory", s.putMemory)
	mux.HandleFunc("GET /api/memory", s.listMemory)
	mux.HandleFunc("GET /api/audit", s.listAudit)
	mux.HandleFunc("POST /api/audit", s.postAudit)
	mux.HandleFunc("GET /api/llm/budget", s.llmBudget)
	mux.HandleFunc("GET /api/me", s.me)
	mux.HandleFunc("GET /api/health", func(w http.ResponseWriter, r *http.Request) {
		writeJSON(w, http.StatusOK, map[string]any{"ok": true, "ts": time.Now().UTC()})
	})

	// ---- 管理（嵌入式档在线备份）----
	mux.HandleFunc("POST /api/admin/backup", s.backup)
	mux.HandleFunc("GET /api/admin/recovery-holds", s.listRecoveryHolds)
	mux.HandleFunc("POST /api/admin/recovery-holds/{runId}/release", s.releaseRecoveryHold)

	// API 未匹配路径一律 404（不回落 SPA，避免 /api/* 返回 HTML 200）。
	mux.HandleFunc("/api/", func(w http.ResponseWriter, r *http.Request) { http.NotFound(w, r) })

	// 静态前端（embed）；API 全链路：认证（未启用 = 默认租户）→ 租户限流。
	inner := s.withRateLimit(mux)
	var h http.Handler = inner
	if s.Auth != nil {
		h = s.Auth.Middleware(inner)
	}
	mux.HandleFunc("/", s.serveStatic)
	return h
}

// ---- SSE：游标重放 + 在线订阅 + 终态对账由 Query 承担 ----

const sseRetryMillis = 1000

func (s *Server) events(w http.ResponseWriter, r *http.Request) {
	conversationID := r.URL.Query().Get("conversationId")
	isProject := false
	// 项目流（D50）：scope=project&projectId=<id> 订阅项目频道——伪会话键
	// "project:<id>" 复用会话流的持久化/seq/重放机制；租户边界按项目校验。
	if r.URL.Query().Get("scope") == "project" {
		pid := r.URL.Query().Get("projectId")
		if pid == "" {
			http.Error(w, "projectId required for project scope", http.StatusBadRequest)
			return
		}
		if _, err := s.st.GetProject(s.owner(r), pid); err != nil {
			// EXT-8 切片 2：owner 自有未命中时咨询适配器（放行才可订阅项目流）。
			if !s.authorizeSharedProject(s.owner(r), core.ID(pid)) {
				writeStoreErr(w, err)
				return
			}
		}
		conversationID = string(core.ProjectChannelKey(core.ID(pid)))
		isProject = true
	} else if conversationID == "" {
		http.Error(w, "conversationId required", http.StatusBadRequest)
		return
	}
	flusher, ok := w.(http.Flusher)
	if !ok {
		http.Error(w, "streaming unsupported", http.StatusInternalServerError)
		return
	}
	w.Header().Set("Content-Type", "text/event-stream")
	w.Header().Set("Cache-Control", "no-cache")
	w.Header().Set("Connection", "keep-alive")
	w.Header().Set("X-Accel-Buffering", "no")

	// 租户边界：跨租户会话不可订阅（NotFound，不泄露存在性）；项目流已按项目校验。
	if !isProject {
		if _, err := s.st.GetConversation(s.owner(r), conversationID); err != nil {
			writeStoreErr(w, err)
			return
		}
	}
	// 浏览器 EventSource 断线后按这个间隔重连，并带上 Last-Event-ID。
	fmt.Fprintf(w, "retry: %d\n\n", sseRetryMillis)
	flusher.Flush()
	since := int64(0)
	if ids := r.Header.Get("Last-Event-ID"); ids != "" {
		since, _ = strconv.ParseInt(ids, 10, 64)
	} else if q := r.URL.Query().Get("since"); q != "" {
		since, _ = strconv.ParseInt(q, 10, 64)
	}

	// 先订阅再重放，避免重放与订阅间隙丢事件；按 seq 去重。
	live, stop := s.Subscribe(conversationID)
	defer stop()

	send := func(e core.StreamEvent) bool {
		buf, _ := json.Marshal(e)
		fmt.Fprintf(w, "id: %d\nevent: %s\ndata: %s\n\n", e.Seq, e.Type, buf)
		flusher.Flush()
		return r.Context().Err() == nil
	}

	lastSent := since
	for {
		replay, err := s.st.EventsAfter(conversationID, lastSent, 1000)
		if err != nil || len(replay) == 0 {
			break
		}
		for _, e := range replay {
			if e.Seq <= lastSent {
				continue
			}
			if !send(e) {
				stop()
				return
			}
			lastSent = e.Seq
		}
		if len(replay) < 1000 {
			break
		}
	}
	// 心跳 + 在线转发。通道关闭表示缓冲溢出，结束响应让 EventSource 带 Last-Event-ID 重连。
	heartbeat := time.NewTicker(15 * time.Second)
	defer heartbeat.Stop()
	for {
		select {
		case <-r.Context().Done():
			stop()
			return
		case <-heartbeat.C:
			fmt.Fprint(w, ": ping\n\n")
			flusher.Flush()
		case e, ok := <-live:
			if !ok {
				stop()
				return
			}
			if e.ConversationID != conversationID || e.Seq <= lastSent {
				continue
			}
			if !send(e) {
				stop()
				return
			}
			lastSent = e.Seq
		}
	}
}

func (s *Server) serveStatic(w http.ResponseWriter, r *http.Request) {
	path := strings.TrimPrefix(r.URL.Path, "/")
	if path == "" {
		path = "index.html"
	}
	data, err := fs.ReadFile(s.static, path)
	if err != nil {
		// SPA 回落 index.html。
		data, err = fs.ReadFile(s.static, "index.html")
		if err != nil {
			http.NotFound(w, r)
			return
		}
		path = "index.html"
	}
	w.Header().Set("X-Content-Type-Options", "nosniff")
	switch {
	case strings.HasSuffix(path, ".html"):
		w.Header().Set("Content-Type", "text/html; charset=utf-8")
		setPageHeaders(w)
	case strings.HasSuffix(path, ".js"):
		w.Header().Set("Content-Type", "text/javascript; charset=utf-8")
	case strings.HasSuffix(path, ".css"):
		w.Header().Set("Content-Type", "text/css; charset=utf-8")
	case strings.HasSuffix(path, ".svg"):
		w.Header().Set("Content-Type", "image/svg+xml")
	}
	w.Write(data)
}

// ---- handlers：项目与会话 ----

// projectView 项目 API 视图：core.Project 字段原样 + EXT-15 共享标注（本人自有
// 项缺省 false/省略；适配器放行的他人项目为 true，供前端区分展示）。
type projectView struct {
	core.Project
	Shared bool `json:"shared,omitempty"`
}

func (s *Server) listProjects(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	ps, err := s.st.ListProjects(owner)
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	out := make([]projectView, 0, len(ps))
	own := make(map[string]bool, len(ps))
	for _, p := range ps {
		own[string(p.ID)] = true
		out = append(out, projectView{Project: p})
	}
	// EXT-15：适配器已注册时，追加经放行的共享项目（他人 owner、去重）。
	if s.ProjectAuthz != nil {
		all, err := s.st.ListAllProjects()
		if err == nil {
			for _, p := range all {
				if own[string(p.ID)] || string(p.Owner) == owner {
					continue
				}
				if ok, aerr := s.ProjectAuthz(owner, p.ID); aerr == nil && ok {
					out = append(out, projectView{Project: p, Shared: true})
				}
			}
		}
	}
	writeJSON(w, http.StatusOK, out)
}

func (s *Server) createProject(w http.ResponseWriter, r *http.Request) {
	var req struct {
		Name string `json:"name"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil || strings.TrimSpace(req.Name) == "" {
		http.Error(w, "name required", http.StatusBadRequest)
		return
	}
	p, err := s.st.CreateProject(s.owner(r), strings.TrimSpace(req.Name))
	writeJSONOr(w, p, err)
}

func (s *Server) patchProject(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	var req struct {
		Name     *string        `json:"name"`
		Settings map[string]any `json:"settings"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	if req.Name != nil {
		if err := s.st.RenameProject(s.owner(r), id, *req.Name); err != nil {
			writeStoreErr(w, err)
			return
		}
	}
	if req.Settings != nil {
		if err := s.st.UpdateProjectSettings(s.owner(r), id, req.Settings); err != nil {
			writeStoreErr(w, err)
			return
		}
	}
	p, err := s.st.GetProject(s.owner(r), id)
	writeJSONOr(w, p, err)
}

func (s *Server) deleteProject(w http.ResponseWriter, r *http.Request) {
	writeOKOr(w, s.st.DeleteProject(s.owner(r), r.PathValue("id")))
}

func (s *Server) listConversations(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	if _, err := s.st.GetProject(owner, r.PathValue("id")); err != nil {
		writeStoreErr(w, err)
		return
	}
	cs, err := s.st.ListConversations(owner, r.PathValue("id"))
	writeJSONOr(w, cs, err)
}

// listTasks 跨项目任务列表（方案 A 侧栏数据源）：默认仅未归档，?archived=1 含归档。
func (s *Server) listTasks(w http.ResponseWriter, r *http.Request) {
	v := r.URL.Query().Get("archived")
	cs, err := s.st.ListTasks(s.owner(r), v == "1" || v == "true")
	writeJSONOr(w, cs, err)
}

// me 当前身份（阶段 1：API key 即身份，user 即租户 owner；嵌入式档 owner 为默认租户）。
// authVia 区分凭证通道：改密门只对会话登录者放行，key 持有者不能改密（无密码属主）。
func (s *Server) me(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	name := owner
	if u, err := s.st.GetUser(owner); err == nil && u.Name != "" {
		name = u.Name
	}
	out := map[string]any{"owner": owner, "name": name, "auth": s.Auth != nil && s.Auth.Enabled, "authVia": AuthVia(r)}
	if st, err := s.st.GetUserAuthState(owner); err == nil {
		out["isAdmin"] = st.IsAdmin
		out["mustChangePassword"] = st.MustChangePassword
	}
	writeJSON(w, http.StatusOK, out)
}

func (s *Server) createConversation(w http.ResponseWriter, r *http.Request) {
	var req struct {
		Title     string `json:"title"`
		ProfileID string `json:"profileId"`
	}
	json.NewDecoder(r.Body).Decode(&req)
	if req.Title == "" {
		req.Title = "新会话"
	}
	c, err := s.st.CreateConversation(s.owner(r), r.PathValue("id"), req.Title, req.ProfileID)
	// EXT-15：自有未命中且适配器放行（成员视角的共享项目）→ 会话仍归属创建者，
	// 只是落在他人项目下；撤销授权后此路径立即 404（不泄露存在性）。
	if errors.Is(err, store.ErrNotFound) && s.authorizeSharedProject(s.owner(r), core.ID(r.PathValue("id"))) {
		c, err = s.st.CreateConversationInProject(s.owner(r), r.PathValue("id"), req.Title, req.ProfileID)
	}
	writeJSONOr(w, c, err)
}

// conversationDetail 终态对账权威：消息树 + runs + 活动 HITL 卡片。
func (s *Server) conversationDetail(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	owner := s.owner(r)
	conv, err := s.st.GetConversation(owner, id)
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	msgs, _ := s.st.ListMessages(id)
	runs, _ := s.st.ListRunsByConversation(id)
	cards, _ := s.st.ActiveHITLCards(owner, id)
	lastSeq, _ := s.st.LastEventSeq(id)
	// resumeSeq：进行中的 run 从它的第一条事件之前重放，刷新或切回时补回已产生的过程。
	resumeSeq := lastSeq
	if open, err := s.st.LatestOpenRun(id); err == nil {
		if seq, ok, ferr := s.st.FirstRunEventSeq(id, open.ID); ferr == nil && ok && seq > 0 {
			resumeSeq = seq - 1
		}
	}
	writeJSON(w, http.StatusOK, map[string]any{
		"conversation": conv, "messages": msgs, "runs": runs,
		"activeHitl": cards, "lastSeq": lastSeq, "resumeSeq": resumeSeq,
	})
}

func (s *Server) patchConversation(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	var req struct {
		Title          string  `json:"title"`
		ProfileID      string  `json:"profileId"`
		Pinned         *bool   `json:"pinned"`
		Archived       *bool   `json:"archived"`
		AllowCrossRead *bool   `json:"allowCrossRead"`
		CrossPrivate   *bool   `json:"crossPrivate"`
		PermissionMode *string `json:"permissionMode"`
		SessionNote    *string `json:"sessionNote"`
	}
	json.NewDecoder(r.Body).Decode(&req)
	onlyMode := req.PermissionMode != nil && req.Title == "" && req.ProfileID == "" && req.Pinned == nil && req.Archived == nil && req.AllowCrossRead == nil && req.CrossPrivate == nil && req.SessionNote == nil
	onlyNote := req.SessionNote != nil && req.Title == "" && req.ProfileID == "" && req.Pinned == nil && req.Archived == nil && req.AllowCrossRead == nil && req.CrossPrivate == nil && req.PermissionMode == nil
	if !onlyMode && !onlyNote {
		if err := s.st.UpdateConversation(s.owner(r), id, req.Title, req.ProfileID); err != nil {
			writeStoreErr(w, err)
			return
		}
	}
	if req.PermissionMode != nil {
		if err := s.st.SetPermissionMode(s.owner(r), id, *req.PermissionMode); err != nil {
			writeStoreErr(w, err)
			return
		}
	}
	if req.SessionNote != nil {
		if err := s.st.SetSessionNote(s.owner(r), id, *req.SessionNote); err != nil {
			writeStoreErr(w, err)
			return
		}
	}
	writeOKOr(w, s.st.SetConversationFlags(s.owner(r), id, req.Pinned, req.Archived, req.AllowCrossRead, req.CrossPrivate))
}

func (s *Server) deleteConversation(w http.ResponseWriter, r *http.Request) {
	writeOKOr(w, s.st.DeleteConversation(s.owner(r), r.PathValue("id")))
}

// ---- 消息发送（含命令路由与附件） ----

func (s *Server) postMessage(w http.ResponseWriter, r *http.Request) {
	convID := r.PathValue("id")
	owner := s.owner(r)
	conv, err := s.st.GetConversation(owner, convID)
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	var req struct {
		Text          string   `json:"text"`
		AttachmentIDs []string `json:"attachmentIds"`
		RequestID     string   `json:"requestId"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	text := strings.TrimSpace(req.Text)
	if expanded, ok := s.expandUserCommand(owner, text); ok {
		text = expanded
	}
	if text == "" && len(req.AttachmentIDs) == 0 {
		http.Error(w, "text or attachments required", http.StatusBadRequest)
		return
	}
	if req.RequestID != "" {
		existing, err := s.st.MessageByRequest(convID, req.RequestID)
		if err == nil {
			s.writeExistingMessage(w, convID, existing)
			return
		}
		if !errors.Is(err, store.ErrNotFound) {
			writeStoreErr(w, err)
			return
		}
	}

	// 技能命令：提示词库命令触发命中时保持原文、跳过命令路由，走正常 run——
	// system 组装时命令触发照常命中（命令是显式意图，不受附件门槛约束）；
	// 技能命令是提示词层能力，不进命令总线。
	skillCommand := false
	if s.Prompts != nil && strings.HasPrefix(text, "/") {
		if _, _, ok, err := s.Prompts.MatchCommand(owner, text); err == nil && ok {
			skillCommand = true
		}
	}

	// 命令路由：/ 开头走内置命令，不启动 run（4.11 输入增强）。
	if strings.HasPrefix(text, "/") && !skillCommand {
		s.handleCommand(w, r, conv, text)
		return
	}

	parts := []core.Part{}
	if text != "" {
		parts = append(parts, core.Part{Type: core.PartText, Text: text})
	}
	var parsedDocs []core.ParsedDocument
	var inputs []runmgr.WorkspaceFile
	for _, artID := range req.AttachmentIDs {
		art, err := s.st.GetArtifact(owner, artID)
		if err != nil {
			http.Error(w, "attachment "+artID+" not found", http.StatusBadRequest)
			return
		}
		content, _ := s.st.ArtifactContent(owner, artID)
		if len(content) > 0 {
			inputs = append(inputs, runmgr.WorkspaceFile{Name: art.Name, Content: content})
		}
		doc := ingest.Parse(art.Name, art.MIME, content)
		parsedDocs = append(parsedDocs, doc)
		parts = append(parts, core.Part{Type: core.PartArtifactRef, Artifact: &core.ArtifactRef{ArtifactID: art.ID, Name: art.Name, Kind: art.Kind}})
	}

	// 先路由再落库。回合和工作流要先抢槽位，忙则 409 且不写任何数据。
	// 意图命中的命令不占槽位，会话忙时也能用。
	// 路由裁决统一走唯一 Router（internal/route；I1 WP3）。
	routeKind := route.KindTurn
	var recognized intentgate.MatchResult
	var workflowDef core.WorkflowDef
	if s.Gate != nil && !strings.HasPrefix(text, "/") {
		recognized = s.recognize(r.Context(), text)
		dec := route.Decide(recognized, route.Env{
			HasCommand: func(id string) bool { return s.Bus != nil && s.Bus.HasCommand(id) },
			WorkflowFor: func(intentID string) (core.WorkflowDef, bool) {
				if s.Workflows == nil {
					return core.WorkflowDef{}, false
				}
				return s.Workflows.ByIntent(intentID)
			},
			// SquadReady 保持 false：per-run entry 覆盖未就位（见 route 包注释的已知边界）。
		})
		switch dec.Kind {
		case route.KindCommand:
			routeKind = route.KindCommand
			recognized.ID = dec.CommandID
			recognized.Slots = dec.Slots
		case route.KindWorkflow:
			routeKind = route.KindWorkflow
			workflowDef = dec.Workflow
			recognized.Slots = dec.Slots
		}
	}
	claimed := false
	if routeKind == route.KindTurn || routeKind == route.KindWorkflow {
		// 执行许可预检（U3，R8）：待执行队列已满时 429 且不写任何数据
		//（与忙 409 同位；排队中的接纳不受影响）。
		if s.mgr.QueueFull() {
			http.Error(w, "execution queue full（runtime.execQueueMax）", http.StatusTooManyRequests)
			return
		}
		if err := s.mgr.ClaimConversation(convID); err != nil {
			writeStoreErr(w, err)
			return
		}
		claimed = true
	}
	msg := core.Message{ConversationID: convID, Role: core.RoleUser, Parts: parts}
	if err := s.st.AppendMessageWithRequest(&msg, req.RequestID); err != nil {
		var dup *store.DuplicateRequestError
		if errors.As(err, &dup) {
			if claimed {
				s.mgr.ReleaseConversation(convID)
			}
			s.writeExistingMessage(w, convID, dup.Existing)
			return
		}
		if claimed {
			s.mgr.ReleaseConversation(convID)
		}
		writeStoreErr(w, err)
		return
	}
	if routeKind == route.KindCommand {
		resp := s.Bus.Dispatch(r.Context(), cmdbus.Request{
			ID: recognized.ID, Params: map[string]any{"text": text}, Entrance: "chat", Actor: owner,
			Owner: owner, ConversationID: convID, AnchorMessageID: msg.ID,
		})
		out := map[string]any{"message": msg, "receipt": resp.Receipt, "command": recognized.ID}
		if resp.Card != nil {
			out["card"] = resp.Card
		}
		if m, ok := resp.Payload.(map[string]any); ok {
			for k, v := range m {
				out[k] = v
			}
		}
		writeJSON(w, http.StatusOK, out)
		return
	}
	var run core.Run
	var startErr error
	if routeKind == route.KindWorkflow {
		missing := make([]workflow.SlotQuestion, len(recognized.Missing))
		for i, q := range recognized.Missing {
			missing[i] = workflow.SlotQuestion{Key: q.Key, Question: q.Question}
		}
		run, startErr = s.mgr.StartClaimedWorkflowRun(conv, msg, workflowDef, recognized.Slots, missing)
	} else {
		run, startErr = s.mgr.StartClaimedConversationRun(conv, msg, parsedDocs, inputs)
	}
	if startErr != nil {
		s.mgr.ReleaseConversation(convID)
		writeStoreErr(w, startErr)
		return
	}
	_ = s.st.SetMessageRunID(msg.ID, run.ID)
	msg.RunID = run.ID
	writeJSON(w, http.StatusOK, map[string]any{"message": msg, "run": run})
}

// writeExistingMessage 把同一 requestId 的已有消息和仍在进行的 run 原样返回。
func (s *Server) writeExistingMessage(w http.ResponseWriter, convID string, msg core.Message) {
	out := map[string]any{"message": msg}
	if msg.RunID != "" {
		if run, err := s.st.GetRunByID(msg.RunID); err == nil {
			out["run"] = run
			writeJSON(w, http.StatusOK, out)
			return
		}
	}
	if run, err := s.st.LatestOpenRun(convID); err == nil {
		out["run"] = run
	}
	writeJSON(w, http.StatusOK, out)
}

// handleCommand `/` 入口 → 命令总线（D27 四入口同源；slash 语义解析后统一分发+审计）。
func (s *Server) handleCommand(w http.ResponseWriter, r *http.Request, conv core.Conversation, text string) {
	fields := strings.Fields(text)
	slash := strings.ToLower(fields[0])
	if s.Bus == nil {
		http.Error(w, "commands disabled", http.StatusServiceUnavailable)
		return
	}
	id, ok := s.Bus.ResolveSlash(slash)
	if !ok {
		http.Error(w, "未知命令 "+slash+"（/help 查看）", http.StatusBadRequest)
		return
	}
	params, err := parseSlashParams(id, fields[1:])
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	resp := s.Bus.Dispatch(r.Context(), cmdbus.Request{
		ID: id, Params: params, Entrance: "slash", Actor: s.owner(r),
		Owner: s.owner(r), ConversationID: conv.ID,
		HostProjectID: string(conv.ProjectID),
	})
	out := map[string]any{"command": slash, "receipt": resp.Receipt}
	if m, ok := resp.Payload.(map[string]any); ok {
		for k, v := range m {
			out[k] = v
		}
	}
	if resp.Receipt.State == agentcommand.StateRejected {
		out["error"] = resp.Receipt.Reason
	}
	writeJSON(w, http.StatusOK, out)
}

// parseSlashParams slash 参数 → 命令参数（按命令语义；未知参数原样透传由 schema 校验拒绝）。
func parseSlashParams(id string, args []string) (map[string]any, error) {
	switch id {
	case "runtime.mock":
		if len(args) != 1 || (args[0] != "on" && args[0] != "off") {
			return nil, errors.New("usage: /mock on|off")
		}
		return map[string]any{"on": args[0] == "on"}, nil
	case "models.set":
		if len(args) < 1 {
			return nil, errors.New("usage: /model <model-name>")
		}
		return map[string]any{"model": strings.Join(args, " ")}, nil
	case "conversation.profile":
		if len(args) < 1 {
			return nil, errors.New("usage: /profile <id>")
		}
		return map[string]any{"profileId": args[0]}, nil
	case "conversation.create":
		if len(args) > 0 {
			return map[string]any{"title": strings.Join(args, " ")}, nil
		}
		return map[string]any{}, nil
	default:
		return map[string]any{}, nil
	}
}

// execCommand 通用命令入口（button/card/chat 等 API 客户端统一走此路由；D27）。
func (s *Server) execCommand(w http.ResponseWriter, r *http.Request) {
	if s.Bus == nil {
		http.Error(w, "commands disabled", http.StatusServiceUnavailable)
		return
	}
	var body struct {
		Params          map[string]any `json:"params"`
		Entrance        string         `json:"entrance"`
		ConversationID  string         `json:"conversationId"`
		AnchorMessageID string         `json:"anchorMessageId"`
	}
	_ = json.NewDecoder(r.Body).Decode(&body)
	if body.Params == nil {
		body.Params = map[string]any{}
	}
	var hostProject string
	if body.ConversationID != "" {
		if conv, err := s.st.GetConversation(s.owner(r), body.ConversationID); err == nil {
			hostProject = string(conv.ProjectID)
		}
	}
	resp := s.Bus.Dispatch(r.Context(), cmdbus.Request{
		ID: r.PathValue("id"), Params: body.Params, Entrance: body.Entrance, Actor: s.owner(r),
		Owner: s.owner(r), ConversationID: body.ConversationID, AnchorMessageID: body.AnchorMessageID,
		HostProjectID: hostProject,
	})
	code := http.StatusOK
	if resp.Receipt.State == agentcommand.StateRejected {
		code = http.StatusBadRequest
	}
	out := map[string]any{"receipt": resp.Receipt}
	if resp.Payload != nil {
		out["payload"] = resp.Payload
	}
	if resp.Card != nil {
		out["card"] = resp.Card
	}
	writeJSON(w, code, out)
}

// listWorkspaces 插件工作区声明（T4；前端合并其内置工作区后渲染 OverlayHost）。
func (s *Server) listWorkspaces(w http.ResponseWriter, r *http.Request) {
	ws := []core.PluginWorkspace{}
	if s.plugins != nil {
		ws = s.plugins.ListWorkspaces()
	}
	writeJSON(w, http.StatusOK, ws)
}

// listAudits 审计查询（会话维度或全局；入口对称的可核查凭证）。
func (s *Server) listAudits(w http.ResponseWriter, r *http.Request) {
	limit, _ := strconv.Atoi(r.URL.Query().Get("limit"))
	audits, err := s.st.ListAudits(s.owner(r), r.URL.Query().Get("conversationId"), limit)
	writeJSONOr(w, map[string]any{"audits": audits}, err)
}

func (s *Server) cancelRun(w http.ResponseWriter, r *http.Request) {
	runID := r.PathValue("id")
	err := s.mgr.CancelRun(runID)
	if err == nil {
		writeOKOr(w, nil)
		return
	}
	// 跨实例取消（协作存储 U5/KTD5）：run 不在本实例执行（无句柄）且 PG 档
	// ——写持久命令，由执行实例消费；API 立即受理（命令可见、唯一消费）。
	if s.st.Dialect() == "postgres" && s.mgr.RunActiveLocally(runID) == false {
		if cerr := s.st.EnqueueCommand(store.NewID("cmd"), "cancel", runID, "", 0,
			runmgr.CancelCommandPayload{Owner: s.owner(r), RunID: runID}); cerr != nil {
			writeStoreErr(w, err)
			return
		}
		writeJSON(w, http.StatusAccepted, map[string]any{"accepted": true, "via": "command"})
		return
	}
	writeStoreErr(w, err)
}

func (s *Server) getRun(w http.ResponseWriter, r *http.Request) {
	run, err := s.st.GetRun(s.owner(r), r.PathValue("id"))
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	children, _ := s.st.ChildRuns(run.ID)
	writeJSON(w, http.StatusOK, map[string]any{"run": run, "children": children})
}

// ---- HITL ----

func (s *Server) resolveHITL(w http.ResponseWriter, r *http.Request) {
	var resp core.HITLResponse
	if err := json.NewDecoder(r.Body).Decode(&resp); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	resp.CardID = r.PathValue("id")
	pivotText, pivoted, err := s.mgr.ResolveHITL(s.owner(r), string(resp.CardID), resp)
	if err != nil && s.st.Dialect() == "postgres" {
		// 跨实例 HITL（U5/KTD5）：本地无执行句柄——写持久命令，执行实例
		// 消费时重验 gate（cardID+gateVersion），过期审批明确拒绝。
		if card, gerr := s.st.GetHITLCard(s.owner(r), string(resp.CardID)); gerr == nil && !card.Resolved {
			kind := resp.ChoiceID
			if kind == "" {
				kind = "free"
			}
			if cerr := s.st.EnqueueCommand(store.NewID("cmd"), "hitl", string(card.RunID), string(card.ConversationID), 0,
				runmgr.HITLCommandPayload{Owner: s.owner(r), CardID: string(resp.CardID), Kind: kind, Answer: json.RawMessage(resp.FreeText)}); cerr == nil {
				writeJSON(w, http.StatusAccepted, map[string]any{"accepted": true, "via": "command"})
				return
			}
		}
	}
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	writeJSON(w, http.StatusOK, map[string]any{"resolved": true, "pivoted": pivoted, "pivotText": pivotText})
}

// ---- 收件箱任务卡 ----

func (s *Server) listCards(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	if _, err := s.st.GetConversation(owner, r.PathValue("id")); err != nil {
		writeStoreErr(w, err)
		return
	}
	cards, err := s.Cards.List(owner, r.PathValue("id"))
	writeJSONOr(w, map[string]any{"cards": cards}, err)
}

// listProjectCards 项目收件箱聚合（D49 拍板口径）：项目级卡 ∪ 该项目全部会话
// 的未决卡；done 卡不聚合。跨租户 NotFound（不泄露存在性）。
func (s *Server) listProjectCards(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	if _, err := s.st.GetProject(owner, r.PathValue("id")); err != nil {
		writeStoreErr(w, err)
		return
	}
	cards, err := s.st.ListProjectCards(owner, r.PathValue("id"))
	writeJSONOr(w, map[string]any{"cards": cards}, err)
}

// cardToProject 会话卡留档到项目收件箱（D48）：复制为项目级卡（幂等），原卡
// dismissed 留痕；回执给前端 upsert 两张卡的终态。
func (s *Server) cardToProject(w http.ResponseWriter, r *http.Request) {
	created, err := s.Cards.ToProject(s.owner(r), r.PathValue("id"))
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	origin, gerr := s.Cards.Get(s.owner(r), r.PathValue("id"))
	if gerr != nil {
		writeJSONOr(w, map[string]any{"card": created}, gerr)
		return
	}
	writeJSON(w, http.StatusOK, map[string]any{"card": created, "origin": origin})
}

// cardAction 处理卡上按钮：resolved + 回执消息进对话时间线（确认即留痕）。
func (s *Server) cardAction(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	var body struct {
		FreeText string `json:"freeText,omitempty"`
	}
	_ = json.NewDecoder(r.Body).Decode(&body)
	// 命令确认卡（ref=cmd:<id>）走总线回道：confirm=执行挂起命令，其余=取消。
	if ref, err := s.st.CardRef(owner, r.PathValue("id")); err == nil && strings.HasPrefix(ref, "cmd:") {
		if card, err := s.Cards.Get(owner, r.PathValue("id")); err == nil && card.Status == core.CardActionRequired {
			resp := s.Bus.Confirm(owner, card.ID, r.PathValue("actionId"))
			writeJSON(w, http.StatusOK, map[string]any{"card": card, "receipt": resp.Receipt, "payload": resp.Payload})
			return
		}
	}
	card, label, err := s.Cards.Action(owner, r.PathValue("id"), r.PathValue("actionId"), body.FreeText)
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	// 回执消息：确认结论写进对话时间线（含所点按钮语义），审计锚点为 card.resolved 事件。
	// 返回持久化后的回执消息（服务端 id），前端本地追加后与权威对账不重复。
	var receipt *core.Message
	if card.ConversationID != "" {
		receipt = &core.Message{ID: store.NewID("msg"), ConversationID: card.ConversationID, Role: core.RoleAssistant, CreatedAt: time.Now().UTC()}
		receipt.Parts = []core.Part{{Type: core.PartText, Text: fmt.Sprintf("✓ 已按「%s」处理「%s」——结论已记录并留痕（card:%s）", label, card.Title, card.ID)}}
		_ = s.st.AppendMessage(receipt)
	}
	writeJSON(w, http.StatusOK, map[string]any{"card": card, "receipt": receipt})
}

func (s *Server) cardPin(w http.ResponseWriter, r *http.Request) {
	var body struct {
		Pinned bool `json:"pinned"`
	}
	_ = json.NewDecoder(r.Body).Decode(&body)
	card, err := s.Cards.SetPinned(s.owner(r), r.PathValue("id"), body.Pinned)
	writeJSONOr(w, map[string]any{"card": card}, err)
}

func (s *Server) cardDismiss(w http.ResponseWriter, r *http.Request) {
	card, err := s.Cards.Dismiss(s.owner(r), r.PathValue("id"))
	writeJSONOr(w, map[string]any{"card": card}, err)
}

// ---- 上传与工件 ----

func (s *Server) upload(w http.ResponseWriter, r *http.Request) {
	projectID := r.PathValue("id")
	r.ParseMultipartForm(64 << 20)
	file, header, err := r.FormFile("file")
	if err != nil {
		http.Error(w, "file field required", http.StatusBadRequest)
		return
	}
	defer file.Close()
	content, err := io.ReadAll(io.LimitReader(file, 100<<20))
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	owner := s.owner(r)
	if _, err := s.st.GetProject(owner, projectID); err != nil {
		writeStoreErr(w, err)
		return
	}
	mime := header.Header.Get("Content-Type")
	art := core.Artifact{ProjectID: projectID, Owner: owner, Name: header.Filename, Kind: kindOf(header.Filename), MIME: mime}
	if err := s.st.CreateArtifact(&art, content); err != nil {
		writeStoreErr(w, err)
		return
	}
	// 摄取卡（SR-A5 界面化）：解析过程显式可见，失败不静默——原始文件已存工件可取回。
	// v1 边界：上传为项目级事件，卡片按项目持久化（conversationId 空）；会话内演示见 mock #upload。
	ingestCard := core.ActivityCard{
		ProjectID: projectID, Kind: core.CardKindProgress, Title: header.Filename,
		Status: core.CardActive, Tone: "info",
		Body: []core.UINode{{Type: core.UIProgress, Progress: &core.UIProgressSpec{Label: "解析中", Value: 0.3}}},
	}
	if s.Cards != nil {
		ingestCard, _ = s.Cards.Create(owner, ingestCard, "")
	}
	doc := ingest.Parse(art.Name, mime, content)
	if s.Cards != nil {
		ingestCard.Status = core.CardDone
		ingestCard.Tone = "ok"
		body := []core.UINode{
			{Type: core.UIKV, KV: [][2]string{{"解析器", doc.Meta.Parser}, {"内容块", fmt.Sprint(len(doc.Blocks))}}},
			{Type: core.UIActions, Actions: []core.UIAction{{ID: "open", Label: "📄 打开工件", Command: ""}}},
		}
		if len(doc.Warnings) > 0 {
			ingestCard.Status = core.CardActionRequired
			ingestCard.Tone = "warn"
			for _, wn := range doc.Warnings {
				body = append(body, core.UINode{Type: core.UIMarkdown, Markdown: "⚠ " + wn})
			}
			body = append(body, core.UINode{Type: core.UIMarkdown, Markdown: "_解析不完整不静默：原始文件已永久保留，可取回或重试。_"})
		}
		ingestCard.Body = body
		_ = s.Cards.Update(owner, ingestCard)
	}
	// 文本可解析的进检索索引（管线分块+全文+可选向量）。
	// EXT-9：宿主关闭自动索引时跳过（发布决定移交下游命令层；原件与摄取卡不变）。
	if !s.DisableUploadIndexing {
		if plain := doc.PlainText(); plain != "" && len(plain) < 200000 {
			if s.Indexer != nil {
				_ = s.Indexer.IndexDocument(owner, projectID, "upload", art.Name, art.ID, plain)
			} else {
				_ = s.st.AddKnowledge(core.KnowledgeDoc{Owner: owner, ProjectID: projectID, Source: "upload", Title: art.Name, Ref: art.ID, Chunk: plain})
			}
		}
	}
	writeJSON(w, http.StatusOK, core.UploadInfo{ArtifactID: art.ID, Filename: art.Name, MIME: mime, Size: art.Size, Parsed: &doc})
}

func kindOf(filename string) string {
	switch {
	case strings.HasSuffix(strings.ToLower(filename), ".md"), strings.HasSuffix(strings.ToLower(filename), ".txt"), strings.HasSuffix(strings.ToLower(filename), ".docx"), strings.HasSuffix(strings.ToLower(filename), ".pdf"):
		return "document"
	case strings.Contains(strings.ToLower(filename), ".png"), strings.Contains(strings.ToLower(filename), ".jpg"), strings.Contains(strings.ToLower(filename), ".jpeg"), strings.Contains(strings.ToLower(filename), ".webp"), strings.Contains(strings.ToLower(filename), ".gif"):
		return "image"
	default:
		return "data"
	}
}

func (s *Server) listArtifacts(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	pid := r.PathValue("id")
	if _, err := s.st.GetProject(owner, pid); err != nil {
		// EXT-8：owner 自有未命中时问适配器；放行则返回项目全部工件（只读共享）。
		if !s.authorizeSharedProject(owner, core.ID(pid)) {
			writeStoreErr(w, err)
			return
		}
		as, err := s.st.ListProjectArtifactsAll(pid)
		writeJSONOr(w, as, err)
		return
	}
	as, err := s.st.ListArtifacts(owner, pid)
	writeJSONOr(w, as, err)
}

// sharedArtifactGet EXT-8 工件读取回退：owner 自有未命中 → 取元数据问适配器，
// 放行才返回；否则保持 NotFound（不泄露存在性）。
func (s *Server) sharedArtifactGet(owner, id string) (core.Artifact, bool) {
	a, err := s.st.GetArtifactByID(id)
	if err != nil {
		return core.Artifact{}, false
	}
	if !s.authorizeSharedProject(owner, a.ProjectID) {
		return core.Artifact{}, false
	}
	return a, true
}

func (s *Server) getArtifact(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	a, err := s.st.GetArtifact(owner, r.PathValue("id"))
	if err != nil {
		shared, ok := s.sharedArtifactGet(owner, r.PathValue("id"))
		if !ok {
			writeStoreErr(w, err)
			return
		}
		writeJSON(w, http.StatusOK, shared)
		return
	}
	writeJSONOr(w, a, err)
}

func (s *Server) artifactContent(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	a, err := s.st.GetArtifact(owner, r.PathValue("id"))
	if err != nil {
		shared, ok := s.sharedArtifactGet(owner, r.PathValue("id"))
		if !ok {
			writeStoreErr(w, err)
			return
		}
		a = shared
	}
	content, err := s.st.ArtifactContentByID(a.ID)
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	ct := contentTypeOf(a)
	w.Header().Set("Content-Type", ct)
	setArtifactHeaders(w, ct)
	w.Header().Set("Content-Disposition", contentDisposition(a.Name, r.URL.Query().Get("download") == "1"))
	w.Write(content)
}

func (s *Server) putArtifactContent(w http.ResponseWriter, r *http.Request) {
	body, _ := io.ReadAll(io.LimitReader(r.Body, 20<<20))
	writeOKOr(w, s.st.UpdateArtifactContent(s.owner(r), r.PathValue("id"), body))
}

func (s *Server) deleteArtifact(w http.ResponseWriter, r *http.Request) {
	writeOKOr(w, s.st.DeleteArtifact(s.owner(r), r.PathValue("id")))
}

// ---- 画像 ----

func (s *Server) listProfiles(w http.ResponseWriter, r *http.Request) {
	ps, err := s.prof.List(s.owner(r))
	writeJSONOr(w, ps, err)
}

func (s *Server) saveProfile(w http.ResponseWriter, r *http.Request) {
	var p core.AgentProfile
	if err := json.NewDecoder(r.Body).Decode(&p); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	if p.ID == "" {
		p.ID = "prof_" + strconv.FormatInt(time.Now().UnixNano()%100000, 10)
	}
	if err := s.prof.Save(s.owner(r), p); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	writeJSON(w, http.StatusOK, p)
}

func (s *Server) deleteProfile(w http.ResponseWriter, r *http.Request) {
	writeOKOr(w, s.prof.Delete(s.owner(r), r.PathValue("id")))
}

// ---- 设置 ----

func (s *Server) getSettings(w http.ResponseWriter, r *http.Request) {
	owner := s.owner(r)
	projectID := r.URL.Query().Get("project")
	schema := append(settings.Schema(), s.plugins.SettingsSchema()...)
	writeJSON(w, http.StatusOK, map[string]any{
		"schema":   schema,
		"defaults": settings.Masked(settings.SystemDefaults(), schema),
		"user":     settings.Masked(mustUser(s.set, owner), schema),
		"project":  settings.Masked(mustScope(s.set, owner, projectID), schema),
	})
}

func mustUser(s *settings.Service, owner string) map[string]any {
	m, _ := s.UserScope(owner)
	if m == nil {
		return map[string]any{}
	}
	return m
}

func mustScope(s *settings.Service, owner, projectID string) map[string]any {
	if projectID == "" {
		return map[string]any{}
	}
	m, _ := s.ProjectScope(owner, projectID)
	return m
}

func (s *Server) putSettingsUser(w http.ResponseWriter, r *http.Request) {
	var values map[string]any
	if err := json.NewDecoder(r.Body).Decode(&values); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	writeOKOr(w, s.set.MergeUser(s.owner(r), values))
}

func (s *Server) putSettingsProject(w http.ResponseWriter, r *http.Request) {
	var values map[string]any
	if err := json.NewDecoder(r.Body).Decode(&values); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	writeOKOr(w, s.set.MergeProject(s.owner(r), r.PathValue("id"), values))
}

// ---- 工具（用户声明式 HTTP 工具注册）----

// visibleTools Hidden（预留能力）工具按租户生效设置过滤：runtime.fsTools 未开不可见。
func (s *Server) visibleTools(owner string) []core.ToolDesc {
	list := tools.FilterExecDisabled(s.reg.List())
	if s.set.Effective(owner, "").GetBool("runtime.fsTools", false) {
		return list
	}
	out := make([]core.ToolDesc, 0, len(list))
	for _, t := range list {
		if !t.Hidden {
			out = append(out, t)
		}
	}
	return out
}

func (s *Server) listTools(w http.ResponseWriter, r *http.Request) {
	writeJSON(w, http.StatusOK, s.visibleTools(s.owner(r)))
}

func (s *Server) createUserTool(w http.ResponseWriter, r *http.Request) {
	var desc core.ToolDesc
	if err := json.NewDecoder(r.Body).Decode(&desc); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	desc.Source = core.SourceUser
	if desc.HTTP == nil {
		http.Error(w, "v1 用户工具需为声明式 HTTP 工具（提供 http 段）", http.StatusBadRequest)
		return
	}
	lookup := func(key string) string { return s.set.Effective(s.owner(r), "").GetString(key, "") }
	if err := s.reg.Register(desc, tools.HTTPExecutor(*desc.HTTP, lookup)); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	writeJSON(w, http.StatusOK, desc)
}

func (s *Server) deleteUserTool(w http.ResponseWriter, r *http.Request) {
	name := r.PathValue("name")
	if desc, _, ok := s.reg.Get(name); ok && desc.Source != core.SourceUser {
		http.Error(w, "仅可删除 user 来源工具", http.StatusForbidden)
		return
	}
	s.reg.UnregisterBySource(core.SourceUser, name)
	writeJSON(w, http.StatusOK, map[string]any{"deleted": name})
}

// ---- 插件 ----

// CompiledPlugin 是一个编译进二进制的进程内插件的注册面摘要（WP3-I4）：
// ID 即插件身份；Commands/Intents/Skills 为装载期成功注册的声明资产名。
// 命令规格与处理器在命令总线，摘要只服务 /api/plugins 管理清单展示。
type CompiledPlugin struct {
	ID         string
	Commands   []string
	Intents    []string
	Skills     []string
	AdminZones []AdminZoneSection
}

// AdminZoneSection 是编译插件声明的管理区展示分区（WP3-I3/KTD4）：
// 字段与 extension.AdminZoneSpec 对齐（组合根装载期记录）；入口不做基座级
// 权限判定，分区内数据能力由组件自身命令面 fail-closed。
type AdminZoneSection struct {
	ID    string `json:"id"`
	Title string `json:"title"`
	Icon  string `json:"icon,omitempty"`
	Desc  string `json:"desc,omitempty"`
	Order int    `json:"order,omitempty"`
}

type pluginView struct {
	Manifest  core.PluginManifest      `json:"manifest"`
	Panels    []core.PluginPanel       `json:"panels"`
	Cards     map[string][]core.UINode `json:"cards"`
	Workflows []core.WorkflowDef       `json:"workflows"`
	Intents   []json.RawMessage        `json:"intents"`
	Prompts   map[string]string        `json:"prompts"`
	Settings  []core.SettingDesc       `json:"settings"`
	Pages     []core.PluginPageDecl    `json:"pages,omitempty"`
	Channels  []core.PluginChannelDecl `json:"channels,omitempty"`
	Skills    map[string]string        `json:"skills,omitempty"`
}

func (s *Server) listPlugins(w http.ResponseWriter, r *http.Request) {
	var out []pluginView
	dirIDs := map[string]bool{}
	for _, ld := range s.plugins.ListFor(s.owner(r), r.URL.Query().Get("projectId")) {
		dirIDs[ld.Manifest.ID] = true
		out = append(out, pluginView{
			Manifest: ld.Manifest, Panels: ld.Panels, Cards: ld.Cards,
			Workflows: ld.Workflows, Intents: ld.Intents, Prompts: ld.Prompts, Settings: ld.PluginSettings,
			Pages: ld.Pages, Channels: ld.Channels, Skills: ld.Skills,
		})
	}
	// 编译插件（WP3-I4）：条目由注册面合成——backend.mode=inproc 标记编译
	// 来源，apiVersion 取扩展面版本；与目录插件同名时目录 manifest 权威
	// （目录版本可装卸、信息更全），编译条目不重复列出。
	for _, cp := range s.CompiledPlugins {
		if dirIDs[cp.ID] {
			continue
		}
		out = append(out, pluginView{Manifest: core.PluginManifest{
			ID: cp.ID, Name: cp.ID, APIVersion: extension.SurfaceVersion,
			Provides: core.PluginProvides{Commands: cp.Commands, Intents: cp.Intents, Skills: cp.Skills},
			Backend:  core.PluginBackend{Mode: "inproc"},
		}})
	}
	writeJSON(w, http.StatusOK, orEmptySlice(out))
}

func (s *Server) reloadPlugins(w http.ResponseWriter, r *http.Request) {
	results := s.plugins.LoadDir()
	writeJSON(w, http.StatusOK, map[string]any{"reloaded": len(results), "errors": results})
}

func (s *Server) pluginSettingsSchema(w http.ResponseWriter, r *http.Request) {
	writeJSON(w, http.StatusOK, s.plugins.SettingsSchema())
}

// listAdminZoneSections 管理区声明分区清单（WP3-I3）：展平全部编译插件的
// 声明并按 Order→ID 稳定排序。声明是展示元数据，对所有认证主体一致；
// 分区内可见数据由分区组件自身的命令面按 owner fail-closed 判定。
func (s *Server) listAdminZoneSections(w http.ResponseWriter, r *http.Request) {
	var out []AdminZoneSection
	for _, cp := range s.CompiledPlugins {
		out = append(out, cp.AdminZones...)
	}
	sort.Slice(out, func(i, j int) bool {
		if out[i].Order != out[j].Order {
			return out[i].Order < out[j].Order
		}
		return out[i].ID < out[j].ID
	})
	writeJSON(w, http.StatusOK, orEmptySlice(out))
}

// registry 统一注册表视图（来源标记 + 按来源启停入口）。
func (s *Server) registry(w http.ResponseWriter, r *http.Request) {
	reg := map[string]any{
		"tools":   s.visibleTools(s.owner(r)),
		"parsers": ingest.ParsersDescription(),
		"panels":  flattenPanels(s.plugins.List()),
	}
	writeJSON(w, http.StatusOK, reg)
}

func flattenPanels(lds []*plugins.Loaded) []core.PluginPanel {
	var out []core.PluginPanel
	for _, ld := range lds {
		out = append(out, ld.Panels...)
	}
	return out
}

// ---- 计划 / 待办 / 命令 / 检索 ----

func (s *Server) getPlan(w http.ResponseWriter, r *http.Request) {
	p, err := s.st.GetPlan(r.PathValue("id"))
	if errors.Is(err, store.ErrNotFound) {
		writeJSON(w, http.StatusOK, map[string]any{})
		return
	}
	writeJSONOr(w, p, err)
}

func (s *Server) getTodos(w http.ResponseWriter, r *http.Request) {
	l, err := s.st.GetTodos(r.PathValue("id"))
	if errors.Is(err, store.ErrNotFound) {
		writeJSON(w, http.StatusOK, map[string]any{})
		return
	}
	writeJSONOr(w, l, err)
}

func (s *Server) listCommands(w http.ResponseWriter, r *http.Request) {
	out := []map[string]any{}
	if s.Bus != nil {
		slashOf := map[string]string{}
		for slash, id := range s.Bus.SlashTable() {
			slashOf[id] = slash
		}
		for _, c := range s.Bus.List() {
			item := map[string]any{"id": c.Spec.ID, "title": c.Spec.Title, "description": c.Spec.Description, "danger": string(c.Spec.Danger), "source": string(c.Source), "enabled": c.Enabled}
			if slash, ok := slashOf[c.Spec.ID]; ok {
				item["name"] = slash // legacy 兼容：`/` 菜单按 name 消费
			}
			out = append(out, item)
		}
	}
	// 提示词库技能命令（命令触发型 task 模块）：进 `/` 菜单同源展示（发送时由
	// postMessage 改写为技能任务，不走命令总线）。
	if s.Prompts != nil {
		mods, err := s.Prompts.Effective(s.owner(r))
		if err == nil {
			for _, m := range mods {
				if m.Disabled || m.Layer != core.LayerTask {
					continue
				}
				for _, t := range m.Triggers {
					if t.Kind == core.TriggerCommand && t.Command != "" {
						out = append(out, map[string]any{
							"id": m.ID, "name": t.Command, "title": m.Title,
							"description": m.Description, "source": "prompt-skill", "enabled": true,
						})
						break
					}
				}
			}
		}
	}
	out = s.appendUserPromptCommands(s.owner(r), out)
	writeJSON(w, http.StatusOK, out)
}

// ---- 提示词库 API（覆盖链：内置 embed → 用户 DB 行）----

func (s *Server) listPromptModules(w http.ResponseWriter, r *http.Request) {
	if s.Prompts == nil {
		http.Error(w, "prompt library not enabled", http.StatusServiceUnavailable)
		return
	}
	mods, err := s.Prompts.Effective(s.owner(r))
	writeJSONOr(w, mods, err)
}

func (s *Server) savePromptModule(w http.ResponseWriter, r *http.Request) {
	if s.Prompts == nil {
		http.Error(w, "prompt library not enabled", http.StatusServiceUnavailable)
		return
	}
	var m core.PromptModule
	if err := json.NewDecoder(r.Body).Decode(&m); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	if m.ID == "" || m.Layer == "" || strings.TrimSpace(m.Body) == "" {
		http.Error(w, "id/layer/body required", http.StatusBadRequest)
		return
	}
	if err := s.Prompts.Save(s.owner(r), m); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	writeJSON(w, http.StatusOK, m)
}

func (s *Server) deletePromptModule(w http.ResponseWriter, r *http.Request) {
	if s.Prompts == nil {
		http.Error(w, "prompt library not enabled", http.StatusServiceUnavailable)
		return
	}
	writeJSONOr(w, map[string]any{"deleted": r.PathValue("id")}, s.Prompts.Delete(s.owner(r), r.PathValue("id")))
}
func (s *Server) listParsers(w http.ResponseWriter, r *http.Request) {
	writeJSON(w, http.StatusOK, ingest.ParsersDescription())
}

func (s *Server) addKnowledge(w http.ResponseWriter, r *http.Request) {
	var docs []core.KnowledgeDoc
	if err := json.NewDecoder(r.Body).Decode(&docs); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	owner := s.owner(r)
	if _, err := s.st.GetProject(owner, r.PathValue("id")); err != nil {
		writeStoreErr(w, err)
		return
	}
	for i := range docs {
		docs[i].Owner = owner
		docs[i].ProjectID = r.PathValue("id")
		if docs[i].Source == "" {
			docs[i].Source = "manual"
		}
	}
	writeOKOr(w, s.st.AddKnowledge(docs...))
}

func (s *Server) searchKnowledge(w http.ResponseWriter, r *http.Request) {
	q := r.URL.Query().Get("q")
	if q == "" {
		http.Error(w, "q required", http.StatusBadRequest)
		return
	}
	topK, _ := strconv.Atoi(r.URL.Query().Get("topK"))
	query := core.RetrievalQuery{ProjectID: r.URL.Query().Get("project"), Text: q, TopK: topK}
	owner := s.owner(r)
	// EXT-8 余项：Retriever 支持共享版（向量+全文两路追加）时整体走共享版；
	// 否则维持切片 2 行为（本人检索 + 全文共享追加）。
	allow := func(docOwner, projectID core.ID) bool {
		return s.authorizeSharedProject(owner, projectID)
	}
	if rs, ok := s.Retriever.(interface {
		RetrieveShared(ctx context.Context, owner core.ID, q core.RetrievalQuery, allow func(docOwner, projectID core.ID) bool) ([]core.RetrievalHit, error)
	}); ok && s.Retriever != nil {
		hits, err := rs.RetrieveShared(r.Context(), core.ID(owner), query, allow)
		writeJSONOr(w, hits, err)
		return
	}
	var hits []core.RetrievalHit
	var err error
	if s.Retriever != nil {
		hits, err = s.Retriever.Retrieve(r.Context(), owner, query)
	} else {
		hits, err = s.st.SearchKnowledge(owner, query)
	}
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	shared, serr := s.st.SearchKnowledgeShared(owner, query, allow)
	if serr != nil {
		writeStoreErr(w, serr)
		return
	}
	hits = append(hits, shared...)
	if limit := query.TopK; limit > 0 && len(hits) > limit {
		hits = hits[:limit]
	}
	writeJSONOr(w, hits, err)
}

// ---- 帮助 ----

func writeJSON(w http.ResponseWriter, status int, v any) {
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.WriteHeader(status)
	json.NewEncoder(w).Encode(v)
}

func writeJSONOr(w http.ResponseWriter, v any, err error) {
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	writeJSON(w, http.StatusOK, v)
}

func writeOKOr(w http.ResponseWriter, err error) {
	if err != nil {
		writeStoreErr(w, err)
		return
	}
	writeJSON(w, http.StatusOK, map[string]any{"ok": true})
}

func writeStoreErr(w http.ResponseWriter, err error) {
	if errors.Is(err, store.ErrNotFound) {
		http.Error(w, err.Error(), http.StatusNotFound)
		return
	}
	if errors.Is(err, store.ErrConflict) {
		http.Error(w, err.Error(), http.StatusConflict)
		return
	}
	if errors.Is(err, runmgr.ErrConversationBusy) {
		http.Error(w, err.Error(), http.StatusConflict)
		return
	}
	if errors.Is(err, runmgr.ErrAdmissionQueueFull) {
		http.Error(w, err.Error(), http.StatusTooManyRequests)
		return
	}
	http.Error(w, err.Error(), http.StatusInternalServerError)
}

// backup 触发一致性在线备份（嵌入式档：VACUUM INTO；PG 档见运维指南 pg_dump）。
func (s *Server) backup(w http.ResponseWriter, r *http.Request) {
	dir := filepath.Join(s.st.DataDir(), "backups")
	if err := os.MkdirAll(dir, 0o755); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	dest := filepath.Join(dir, "agent-system-"+time.Now().UTC().Format("20060102T150405Z")+".db")
	if err := s.st.Backup(dest); err != nil {
		http.Error(w, err.Error(), http.StatusNotImplemented)
		return
	}
	writeJSON(w, http.StatusOK, map[string]any{"ok": true, "path": dest})
}

// extMIME：常见文档扩展的显式类型表——系统 mime.types 不保证收录 docx/xlsx 等
// Office 格式，显式兜底让上传件的下载与浏览器预览拿到正确 Content-Type。
var extMIME = map[string]string{
	".docx": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
	".xlsx": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
	".pptx": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
	".doc":  "application/msword",
	".xls":  "application/vnd.ms-excel",
	".ppt":  "application/vnd.ms-powerpoint",
	".pdf":  "application/pdf",
	".zip":  "application/zip",
	".csv":  "text/csv; charset=utf-8",
	".md":   "text/markdown; charset=utf-8",
}

func contentTypeOf(a core.Artifact) string {
	if a.MIME != "" {
		return a.MIME
	}
	ext := strings.ToLower(filepath.Ext(a.Name))
	if t, ok := extMIME[ext]; ok {
		return t
	}
	if t := mime.TypeByExtension(ext); t != "" {
		return t
	}
	if a.Kind == "image" {
		return "application/octet-stream"
	}
	return "text/plain; charset=utf-8"
}

// contentDisposition：工件文件名带中文（如 会议纪要.docx）时用 RFC 5987 的
// filename* 权威编码，另给纯 ASCII 兜底；?download=1 切换 attachment（下载），
// 默认 inline（浏览器内预览）。
func contentDisposition(name string, download bool) string {
	disposition := "inline"
	if download {
		disposition = "attachment"
	}
	return fmt.Sprintf(`%s; filename="%s"; filename*=UTF-8''%s`, disposition, asciiFallbackName(name), url.PathEscape(name))
}

// asciiFallbackName：非 ASCII 与引号/反斜杠替换为下划线，仅作 filename 兜底。
func asciiFallbackName(name string) string {
	var b strings.Builder
	for _, r := range name {
		if r >= 0x20 && r < 0x7f && r != '"' && r != '\\' {
			b.WriteRune(r)
		} else {
			b.WriteRune('_')
		}
	}
	return b.String()
}

func orEmptySlice[T any](s []T) []T {
	if s == nil {
		return []T{}
	}
	return s
}