fix: platform_silent记忆提取 + 群聊上下文整合 + 多QQ实例支持

- platform_silent模式接入Orchestrator记忆提取：被动观察群聊时提取值得记住的信息到对应命名空间
- post_chat后台思考注入平台观察：对话后思考也能看到群聊摘要
- QQ适配器：OneBot v11 self_id动态捕获、CQ图片URL提取、视觉+OCR并行处理
- Router解耦：ConfigName/PlatformName分离，支持多QQ实例独立连接
- 黑白名单功能：后端API + Ethend代理 + UI面板
- \n\n双换行断句：AI回复按双换行分割为多条消息按间隔发送
- @提及修复：bot自感知UID进行@检测
- 群聊上下文共享：channel-based userID避免记忆碎片化
- 消息日志显示处理后内容而非原始SSE数据
- platform-bridge Dockerfile + docker-compose.yml更新

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/platform-bridge/internal/config/config.go

@@ -1,6 +1,9 @@
 package config
 
-import "os"
+import (
+	"os"
+	"strings"
+)
 
 // Config holds Platform Bridge configuration.
 type Config struct {
@@ -11,9 +14,17 @@ type Config struct {
 	InternalToken  string
 
 	// Platform-specific.
-	QQBotPort      string // port for QQ OBv11 reverse WebSocket
-	TelegramToken  string // Telegram Bot API token
-	TelegramWebhookURL string // public webhook URL for Telegram
+	QQBotPort           string // port for QQ OBv11 reverse WebSocket
+	TelegramToken       string // Telegram Bot API token
+	TelegramWebhookURL  string // public webhook URL for Telegram
+
+	// Silent observation mode.
+	PlatformSilentEnabled bool     // PLATFORM_SILENT_ENABLED, default true
+	AdminNicknames         []string // ADMIN_NICKNAMES, default ["开拓者"]
+	AdminMentionKeywords   []string // ADMIN_MENTION_KEYWORDS, default ["昔涟","Cyrene","管理员"]
+
+	// Message sending.
+	MessageSendIntervalMs int // MSG_SEND_INTERVAL_MS, minimum interval between platform messages (default 2000)
 }
 
 func Load() *Config {
@@ -48,5 +59,54 @@ func Load() *Config {
 	if v := os.Getenv("TELEGRAM_WEBHOOK_URL"); v != "" {
 		cfg.TelegramWebhookURL = v
 	}
+	// Silent observation defaults.
+	cfg.PlatformSilentEnabled = getEnvBool("PLATFORM_SILENT_ENABLED", true)
+	cfg.AdminNicknames = getEnvList("ADMIN_NICKNAMES", []string{"开拓者"})
+	cfg.AdminMentionKeywords = getEnvList("ADMIN_MENTION_KEYWORDS", []string{"昔涟", "Cyrene", "管理员"})
+	cfg.MessageSendIntervalMs = getEnvInt("MSG_SEND_INTERVAL_MS", 2000)
+
 	return cfg
 }
+
+func getEnvBool(key string, defaultVal bool) bool {
+	v := os.Getenv(key)
+	if v == "" {
+		return defaultVal
+	}
+	return v == "true" || v == "1" || v == "yes"
+}
+
+func getEnvInt(key string, defaultVal int) int {
+	v := os.Getenv(key)
+	if v == "" {
+		return defaultVal
+	}
+	n := 0
+	for _, c := range v {
+		if c >= '0' && c <= '9' {
+			n = n*10 + int(c-'0')
+		} else {
+			return defaultVal
+		}
+	}
+	return n
+}
+
+func getEnvList(key string, defaultVal []string) []string {
+	v := os.Getenv(key)
+	if v == "" {
+		return defaultVal
+	}
+	parts := strings.Split(v, ",")
+	result := make([]string, 0, len(parts))
+	for _, p := range parts {
+		p = strings.TrimSpace(p)
+		if p != "" {
+			result = append(result, p)
+		}
+	}
+	if len(result) == 0 {
+		return defaultVal
+	}
+	return result
+}