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/modules/webpush/capability.toml

@@ -0,0 +1,22 @@
+schema_version = 1
+id = "WebPushModule"
+kind = "host_module"
+entrypoint = "app.modules.webpush:WebPushModule"
+depends_on = []
+
+[metadata]
+name = "WebPush"
+type = "notification"
+subtype = "WebPush"
+priority = 6
+
+[activation]
+policy = "when_configured"
+watch = ["Notifications"]
+
+[activation.selector]
+kind = "system_config_item"
+key = "Notifications"
+match_field = "type"
+match_value = "webpush"
+enabled_field = "enabled"