新增: 历史对话收藏功能，重构 Tab 导航与平台检查

internal/history.go

@@ -88,6 +88,7 @@ type HistoryState struct {
 	FocusPanel int // 0=左栏 1=中栏
 	Loaded     bool
 	Scanning   bool
+	Favorites  map[string]bool
 }
 
 // IsHistoryTab 判断当前是否在 HISTORY Tab
@@ -203,7 +204,6 @@ func scanSessionFile(path string, sessionID string) *Session {
 	scanner := bufio.NewScanner(f)
 	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
 
-
 	lineCount := 0
 	firstMsgFound := false
 
@@ -551,3 +551,76 @@ func saveSummaryToCache(sessionID, summary string, completed, pending []string)
 	entry.Pending = pending
 	saveCache(home, cache)
 }
+
+// --- 收藏 ---
+
+func favoritesPath(home string) string {
+	return filepath.Join(home, ".u-tabs", "favorites.json")
+}
+
+func loadFavorites() map[string]bool {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return make(map[string]bool)
+	}
+	data, err := os.ReadFile(favoritesPath(home))
+	if err != nil {
+		return make(map[string]bool)
+	}
+	var ids []string
+	if json.Unmarshal(data, &ids) != nil {
+		return make(map[string]bool)
+	}
+	m := make(map[string]bool, len(ids))
+	for _, id := range ids {
+		m[id] = true
+	}
+	return m
+}
+
+func saveFavorites(favs map[string]bool) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return
+	}
+	ids := make([]string, 0, len(favs))
+	for id := range favs {
+		ids = append(ids, id)
+	}
+	data, err := json.Marshal(ids)
+	if err != nil {
+		return
+	}
+	dir := filepath.Join(home, ".u-tabs")
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		log.Printf("[u-tabs] favorites mkdir fail: %v", err)
+		return
+	}
+	if err := os.WriteFile(favoritesPath(home), data, 0o644); err != nil {
+		log.Printf("[u-tabs] favorites write fail: %v", err)
+	}
+}
+
+func countFavorites(projects []*ProjectDir, favs map[string]bool) int {
+	n := 0
+	for _, pd := range projects {
+		for _, s := range pd.Sessions {
+			if favs[s.ID] {
+				n++
+			}
+		}
+	}
+	return n
+}
+
+func collectFavorites(projects []*ProjectDir, favs map[string]bool) []*Session {
+	var out []*Session
+	for _, pd := range projects {
+		for _, s := range pd.Sessions {
+			if favs[s.ID] {
+				out = append(out, s)
+			}
+		}
+	}
+	return out
+}