新增: AI 摘要生成 (claude -p)

扫描完成后自动逐个调用 claude -p 生成会话标题,
摘要缓存到 ~/.u-tabs/session-cache.json, 下次免重复调用

internal/app.go

@@ -56,7 +56,10 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.history.Projects = msg.Projects
 		m.history.Loaded = true
 		m.history.Scanning = false
-		return m, nil
+		return m, m.nextSummaryCmd()
+	case SummaryResultMsg:
+		m.applySummary(msg.SessionID, msg.Summary)
+		return m, m.nextSummaryCmd()
 	}
 	return m, nil
 }
@@ -222,6 +225,34 @@ func (m *Model) resumeSelected() (*Model, tea.Cmd) {
 	return m, nil
 }
 
+
+// --- AI 摘要 ---
+
+func (m *Model) applySummary(sessionID, summary string) {
+	if summary == "" {
+		return
+	}
+	for _, pd := range m.history.Projects {
+		for _, s := range pd.Sessions {
+			if s.ID == sessionID {
+				s.AISummary = summary
+				saveSummaryToCache(sessionID, summary)
+				return
+			}
+		}
+	}
+}
+
+func (m *Model) nextSummaryCmd() tea.Cmd {
+	for _, pd := range m.history.Projects {
+		for _, s := range pd.Sessions {
+			if s.AISummary == "" && s.FilePath != "" && s.FirstMsg != "" {
+				return generateSummaryCmd(s.FilePath, s.ID)
+			}
+		}
+	}
+	return nil
+}
 // --- Workspace 光标 ---
 
 func (m *Model) moveCursor(dir int) {

internal/history.go

@@ -3,9 +3,11 @@ package internal
 import (
 	"bufio"
 	"bytes"
+	"context"
 	"encoding/json"
 	"log"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"sort"
 	"strings"
@@ -25,6 +27,7 @@ type Session struct {
 	FirstMsg    string    // 首条用户消息 (截断)
 	AwaySummary string    // away_summary 系统摘要
 	AISummary   string    // AI 生成的摘要 (缓存)
+	FilePath    string    // JSONL 文件完整路径
 }
 
 // ProjectDir 按目录分组的会话集合
@@ -167,7 +170,7 @@ func scanSessionFile(path string, sessionID string) *Session {
 	}
 	defer f.Close()
 
-	s := &Session{ID: sessionID}
+	s := &Session{ID: sessionID, FilePath: path}
 	scanner := bufio.NewScanner(f)
 	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
 
@@ -345,6 +348,7 @@ type cacheEntry struct {
 	FirstMsg    string    `json:"firstMsg"`
 	AwaySummary string    `json:"awaySummary"`
 	AISummary   string    `json:"aiSummary"`
+	FilePath    string    `json:"filePath"`
 }
 
 func (e *cacheEntry) ToSession(id string) *Session {
@@ -353,6 +357,7 @@ func (e *cacheEntry) ToSession(id string) *Session {
 		StartTime: e.StartTime, EndTime: e.EndTime,
 		MsgCount: e.MsgCount, FirstMsg: e.FirstMsg,
 		AwaySummary: e.AwaySummary, AISummary: e.AISummary,
+		FilePath: e.FilePath,
 	}
 }
 
@@ -362,6 +367,7 @@ func cacheEntryFrom(s *Session, modTime time.Time) *cacheEntry {
 		StartTime: s.StartTime, EndTime: s.EndTime,
 		MsgCount: s.MsgCount, FirstMsg: s.FirstMsg,
 		AwaySummary: s.AwaySummary, AISummary: s.AISummary,
+		FilePath: s.FilePath,
 	}
 }
 
@@ -404,3 +410,88 @@ func truncStr(s string, maxRunes int) string {
 	}
 	return string(runes[:maxRunes]) + "..."
 }
+
+// --- AI 摘要生成 ---
+
+type SummaryResultMsg struct {
+	SessionID string
+	Summary   string
+}
+
+func generateSummaryCmd(filePath, sessionID string) tea.Cmd {
+	return func() tea.Msg {
+		summary := generateAISummary(filePath)
+		return SummaryResultMsg{SessionID: sessionID, Summary: summary}
+	}
+}
+
+func generateAISummary(filePath string) string {
+	messages := extractMessagesForSummary(filePath)
+	if messages == "" {
+		return ""
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	prompt := "请用20字以内中文概括以下对话的主题，只输出概括文字，不加引号、标点或markdown格式：\n\n" + messages
+	cmd := exec.CommandContext(ctx, "claude", "-p", prompt)
+	output, err := cmd.Output()
+	if err != nil {
+		return ""
+	}
+
+	summary := strings.TrimSpace(string(output))
+	summary = strings.Trim(summary, "\"'`*")
+	summary = strings.TrimPrefix(summary, "概括：")
+	summary = strings.TrimPrefix(summary, "主题：")
+	if len(summary) > 60 {
+		summary = truncStr(summary, 60)
+	}
+	return summary
+}
+
+func extractMessagesForSummary(path string) string {
+	f, err := os.Open(path)
+	if err != nil {
+		return ""
+	}
+	defer f.Close()
+
+	var msgs []string
+	scanner := bufio.NewScanner(f)
+	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
+
+	userCount := 0
+	for scanner.Scan() {
+		if userCount >= 5 {
+			break
+		}
+		line := scanner.Bytes()
+		if !hasType(line) {
+			continue
+		}
+		if matchType(line, "user") {
+			if msg := extractUserMsg(line); msg != "" {
+				msgs = append(msgs, "用户: "+msg)
+				userCount++
+			}
+		}
+	}
+
+	return strings.Join(msgs, "\n")
+}
+
+func saveSummaryToCache(sessionID, summary string) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return
+	}
+	cache := loadCache(home)
+	entry, ok := cache[sessionID]
+	if !ok {
+		return
+	}
+	entry.AISummary = summary
+	saveCache(home, cache)
+}