Read the reference panel's component names past inline fallbacks

The reference panel now destructures the SDK component kit with default
implementations, so the hygiene test that checks every name it binds is
exported by the v2 SDK has to read the multi-line destructure instead of
the one-line form.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Q7Xrrx3fhVzCCSZSBGjEDa

Author: mnm-matin

tests/test_panel_contract_hygiene.py

@@ -10,7 +10,9 @@
 
 ROOT = Path(__file__).resolve().parents[1]
 PANEL_SDK_SOURCE = ROOT / "frontend" / "src" / "panel-sdk" / "index.tsx"
-REFERENCE_PANEL_SOURCE = ROOT / "src" / "hyperview" / "shipped_extensions" / "reference" / "panel.jsx"
+REFERENCE_PANEL_SOURCE = (
+    ROOT / "src" / "hyperview" / "shipped_extensions" / "reference" / "panel.jsx"
+)
 
 
 def test_v2_sdk_exposes_generic_similarity_hook_to_extensions() -> None:
@@ -42,9 +44,7 @@ def test_custom_panel_snapshot_carries_state_only_in_panel_state_map() -> None:
 
 
 def test_custom_panel_kind_is_normalized_and_unknown_values_fail_clearly() -> None:
-    scatter = CustomPanelSpec.from_dict(
-        {"id": "map", "title": "Map", "kind": "scatter"}
-    )
+    scatter = CustomPanelSpec.from_dict({"id": "map", "title": "Map", "kind": "scatter"})
     extension = CustomPanelSpec.from_dict(
         {"id": "summary", "title": "Summary", "kind": "extension"}
     )
@@ -59,9 +59,7 @@ def test_custom_panel_kind_is_normalized_and_unknown_values_fail_clearly() -> No
         ValueError,
         match="Unsupported panel kind 'iframe'; expected 'builtin' or 'module'",
     ):
-        CustomPanelSpec.from_dict(
-            {"id": "legacy", "title": "Legacy", "kind": "iframe"}
-        )
+        CustomPanelSpec.from_dict({"id": "legacy", "title": "Legacy", "kind": "iframe"})
 
 
 def test_extension_panel_definitions_do_not_publish_lifecycle(tmp_path: Path) -> None:
@@ -128,10 +126,20 @@ def test_shipped_reference_panel_uses_only_components_exported_by_v2_sdk() -> No
     panel_source = REFERENCE_PANEL_SOURCE.read_text(encoding="utf-8")
     sdk_source = PANEL_SDK_SOURCE.read_text(encoding="utf-8")
 
-    component_match = re.search(r"const \{ ([^}]+) \} = components;", panel_source)
+    component_match = re.search(
+        r"(?m)^const \{((?:(?!^const \{)[\s\S])*?)\} = components;", panel_source
+    )
     assert component_match is not None, "the reference panel should demonstrate the component kit"
+    # The destructure may carry inline fallbacks (``Panel = (...) => ...``); the
+    # names it binds are the identifiers that open each entry.
+    body = component_match.group(1)
+    if "\n" in body:
+        used_components = re.findall(r"(?m)^\s*([A-Za-z_]\w*)\s*(?:=|,|$)", body)
+    else:
+        used_components = [name.strip() for name in body.split(",") if name.strip()]
+    assert used_components, "the reference panel should demonstrate the component kit"
 
     declaration = re.search(r"components:\s*\{([\s\S]*?)\};", sdk_source)
     assert declaration is not None
-    for component in (name.strip() for name in component_match.group(1).split(",")):
-        assert f"{component}: typeof {component};" in declaration.group(1)
+    for component in used_components:
+        assert f"{component}: typeof {component};" in declaration.group(1), component