feat(webui): add guided setup flows

* feat(channels): add guided setup flows

* test(channels): preserve setup config values

* fix(channels): reflect saved setup state

* refactor(channels): simplify setup state metadata

* fix(channels): harden setup lifecycle

* refactor(channels): centralize setup contracts

* fix(channels): route setup actions through webui shim

* fix(channels): adapt settings for compact screens

* fix(models): preserve default preset display

* feat(models): add curated Codex catalog

* fix(webui): stop attached gateway on interrupt

* fix(webui): simplify apps catalog

* docs(webui): clarify apps and runtime features

* feat(settings): add guided capability setup

* fix(webui): harden setup and managed services

* test: keep managed runtime checks portable

* test: scope POSIX runtime coverage

* fix(webui): simplify file settings

* feat(files): bundle document reading

* fix(webui): harden setup request boundaries

* fix(webui): prevent channel setup status squeeze

* fix(settings): group provider compatibility aliases

* refactor(settings): remove redundant setup surfaces

* fix(webui): harden guided setup lifecycle

* fix(webui): preserve channel setup compatibility

nanobot/channels/registry.py

@@ -10,7 +10,11 @@ from loguru import logger
 if TYPE_CHECKING:
     from nanobot.channels.base import BaseChannel
 
-_INTERNAL = frozenset({"base", "manager", "registry"})
+_INTERNAL = frozenset({
+    "base",
+    "manager",
+    "registry",
+})
 DEFAULT_ENABLED_CHANNELS = frozenset({"websocket"})
 
 
@@ -21,7 +25,7 @@ def discover_channel_names() -> list[str]:
     return [
         name
         for _, name, ispkg in pkgutil.iter_modules(pkg.__path__)
-        if name not in _INTERNAL and not ispkg
+        if name not in _INTERNAL and not name.startswith("_") and not ispkg
     ]