Merge remote-tracking branch 'origin/v3' into v3

# Conflicts:
#	app/api/endpoints/agent.py
#	app/api/endpoints/anthropic.py
#	app/api/endpoints/openai.py
#	app/chain/__init__.py
#	app/chain/message.py
#	app/chain/site.py
#	app/chain/subscribe.py
#	app/chain/transfer.py
#	app/modules/discord/__init__.py
#	app/modules/qqbot/__init__.py
#	app/modules/slack/__init__.py
#	app/modules/telegram/__init__.py
#	app/modules/wechat/__init__.py
#	app/runtime/extensions/module_manager.py
#	app/runtime/extensions/service_registry.py
#	tests/test_agent_interaction.py
#	tests/test_slash_command_interactions.py
#	tests/test_web_agent_stream.py

app/schemas/types.py

@@ -22,6 +22,13 @@ MUSIC_SUBSCRIBABLE_TYPES = frozenset({
     MUSIC_ENTITY_ALBUM,
 })
 
+
+class ReplyMode(str, Enum):
+    """Agent 最终回复的投递策略，供编排层与调用层共享。"""
+
+    DISPATCH = "dispatch"
+    CAPTURE_ONLY = "capture_only"
+
 # ListenBrainz 音乐探索能力的参数取值域契约，供入口层校验、链层与模块实现共用
 # ListenBrainz 全站统计支持的周期，取值与官方统计页面完全一致
 LISTENBRAINZ_CHART_RANGES = (