fix(backthink): 主动推送降频(15min心跳+60min≤1次+推后30min冷却+刚聊过10min冷避) + 情绪约束(分类限频/活跃感知) + 剥离'我决定:push'内部标记

internal/config/config.go

@@ -141,13 +141,19 @@ type VoiceConfig struct {
 // QuietEndHour bound the do-not-disturb window in local clock hours; they are the
 // single source shared by the backthink service and the channel bridge's
 // minimal-disturbance quiet-hours gate (design/12 §6 策略五). Equal non-zero hours
-// disable the window.
+// disable the window. The Push*/Kind fields tune the proactive-push frequency of
+// design/11 §6 + design/12 §6 and are mapped into backthink.Config.
 type BackgroundConfig struct {
-	Enabled        bool `env:"ENABLE_BACKGROUND_THINKING" default:"true"`
-	IntervalSec    int  `env:"THINK_INTERVAL_SEC" default:"300"`
-	SilenceTimeout int  `env:"THINK_SILENCE_TIMEOUT_SEC" default:"120"`
-	QuietStartHour int  `env:"QUIET_START_HOUR" default:"23"`
-	QuietEndHour   int  `env:"QUIET_END_HOUR" default:"7"`
+	Enabled               bool `env:"ENABLE_BACKGROUND_THINKING" default:"true"`
+	IntervalSec           int  `env:"THINK_INTERVAL_SEC" default:"900"`
+	SilenceTimeout        int  `env:"THINK_SILENCE_TIMEOUT_SEC" default:"120"`
+	QuietStartHour        int  `env:"QUIET_START_HOUR" default:"23"`
+	QuietEndHour          int  `env:"QUIET_END_HOUR" default:"7"`
+	PushLimit             int  `env:"THINK_PUSH_LIMIT" default:"1"`
+	PushWindowSec         int  `env:"THINK_PUSH_WINDOW_SEC" default:"3600"`
+	PushCooldownSec       int  `env:"THINK_PUSH_COOLDOWN_SEC" default:"1800"`
+	RecentChatCooldownSec int  `env:"THINK_RECENT_CHAT_COOLDOWN_SEC" default:"600"`
+	KindWindowSec         int  `env:"THINK_KIND_WINDOW_SEC" default:"7200"`
 }
 
 // WSHubConfig holds the WebSocket hub limits.