fix(plugins): address review -- no manifest fallback for live plugins, keep mode names whole, send registered spelling

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/plugin_system/plugin_catalog.py

@@ -244,6 +244,8 @@ class PluginCatalog:
             if live and any(m.lower() == wanted for m in live):
                 return plugin_id
         for plugin_id, manifest in manifests.items():
+            if self._live_display_modes(plugin_id):
+                continue  # the display's list is the truth for this plugin
             modes = manifest.get('display_modes')
             if isinstance(modes, list) and any(
                     isinstance(m, str) and m.lower() == wanted for m in modes):

src/plugin_system/plugin_runtime.py

@@ -161,7 +161,9 @@ def _published_modes(modes: Any) -> Optional[List[str]]:
     """The registered display modes as a snapshot carries them, or None."""
     if not isinstance(modes, list):
         return None
-    return [_clip(m, _ID_CHARS) for m in modes[:_MAX_MODES] if isinstance(m, str)]
+    # A name is a key the display matches exactly: drop one too long to
+    # carry whole rather than clip it into a different name.
+    return [m for m in modes if isinstance(m, str) and len(m) <= _ID_CHARS][:_MAX_MODES]
 
 
 def build_runtime_snapshot(state_manager: Any, *, started_at: float,