Add optional Nanobot plugin controls (#4396)

* feat: add optional nanobot features

* test: update azure install hint expectation

* fix: validate optional feature extras

maintainer edit: verify requested dependency extras before treating optional features as installed, propagate restart state from feature enablement, and align docs with the new plugins enable command.

* fix: bound optional feature installs

maintainer edit: make optional feature installs time out as a normal install failure instead of leaving the WebUI or CLI action waiting indefinitely.

* feat: slim optional channel dependencies

* fix: log optional install commands

* fix(webui): gate remote feature installs

* docs: clarify webhook plugin example

* fix(webui): harden optional feature installs

* fix: install optional deps without package fallback

* fix(cli): refine plugin feature controls

* fix(webui): count enabled nanobot features

* fix(webui): allow slow feature install routes

* fix(webui): allow disabling websocket channel

* fix(plugins): simplify optional feature controls

* fix(webui): polish apps catalog states

* fix(webui): confirm nanobot support installs

* fix(webui): polish nanobot install dialog

* fix(webui): suppress empty websocket handshakes

* fix(webui): clarify apps plugin summary

* fix(webui): localize workspace access copy

* fix(plugins): polish optional feature controls (#4691)

---------

Co-authored-by: Xubin Ren <52506698+Re-bin@users.noreply.github.com>

nanobot/channels/websocket.py

@@ -59,6 +59,9 @@ from nanobot.webui.mcp_presets_api import normalize_mcp_preset_mentions
 from nanobot.webui.transcription_ws import webui_transcription_event
 from nanobot.webui.websocket_logging import websockets_server_logger
 
+# Plain HTTP WebUI routes also run through websockets.process_request.
+_WEBUI_HTTP_OPEN_TIMEOUT_S = 360.0
+
 
 class WebSocketConfig(Base):
     """WebSocket server channel configuration.
@@ -80,7 +83,7 @@ class WebSocketConfig(Base):
       shared filesystem or an HTTP file server to access these files.
     """
 
-    enabled: bool = False
+    enabled: bool = True
     host: str = "127.0.0.1"
     port: int = 8765
     unix_socket_path: str = ""
@@ -482,6 +485,7 @@ class WebSocketChannel(BaseChannel):
                     handler,
                     socket_path,
                     process_request=process_request,
+                    open_timeout=_WEBUI_HTTP_OPEN_TIMEOUT_S,
                     max_size=self.config.max_message_bytes,
                     ping_interval=self.config.ping_interval_s,
                     ping_timeout=self.config.ping_timeout_s,
@@ -495,6 +499,7 @@ class WebSocketChannel(BaseChannel):
                     self.config.host,
                     self.config.port,
                     process_request=process_request,
+                    open_timeout=_WEBUI_HTTP_OPEN_TIMEOUT_S,
                     max_size=self.config.max_message_bytes,
                     ping_interval=self.config.ping_interval_s,
                     ping_timeout=self.config.ping_timeout_s,