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>

tests/test_msteams.py

@@ -11,7 +11,11 @@ except ImportError:
     MSTEAMS_AVAILABLE = False
 
 if not MSTEAMS_AVAILABLE:
-    pytest.skip("MSTeams dependencies not installed (PyJWT, cryptography). Run: pip install nanobot-ai[msteams]", allow_module_level=True)
+    pytest.skip(
+        "MSTeams dependencies not installed (PyJWT, cryptography). "
+        "Run: nanobot plugins enable msteams",
+        allow_module_level=True,
+    )
 
 import jwt
 from cryptography.hazmat.primitives.asymmetric import rsa
@@ -903,7 +907,7 @@ async def test_start_logs_install_hint_when_pyjwt_missing(make_channel, monkeypa
 
     await ch.start()
 
-    assert errors == ["PyJWT not installed. Run: pip install nanobot-ai[msteams]"]
+    assert errors == ["PyJWT not installed. Run: nanobot plugins enable msteams"]
 
 
 def test_save_refs_prunes_webchat_and_stale_refs(make_channel):