test(cli): repair stale bin.* imports and cover passthrough/--list

Tests still imported and patched the old bin.* package (renamed to
myclaude.* earlier), breaking collection. Point them at myclaude.* and
add coverage for the new claude-flag passthrough and --list session
listing.

tests/test_project_root.py

@@ -4,7 +4,7 @@ import os
 from pathlib import Path
 from unittest.mock import patch
 
-from bin.project_root import get_myclaude_project_root, get_workspace_root
+from myclaude.project_root import get_myclaude_project_root, get_workspace_root
 
 
 class TestGetMyclaudeProjectRoot:
@@ -44,7 +44,7 @@ class TestGetMyclaudeProjectRoot:
             patch.dict(os.environ, {}, clear=True),
             patch("pathlib.Path.cwd", side_effect=OSError),
             patch(
-                "bin.project_root._pyproject_names_myclaude",
+                "myclaude.project_root._pyproject_names_myclaude",
                 return_value=False,
             ),
         ):
@@ -95,7 +95,7 @@ class TestGetWorkspaceRoot:
         with (
             patch.dict(os.environ, {}, clear=True),
             patch(
-                "bin.project_root.get_myclaude_project_root",
+                "myclaude.project_root.get_myclaude_project_root",
                 return_value=tmp_path / ".myclaude",
             ),
             patch("pathlib.Path.home", return_value=home),