fix(hopper): verify bookmark names and clear existing labels

Use the public rename API for an explicit empty existing name, retain omitted names and raw listing values, and verify fresh unnamed creation and explicit mutations by readback. Preserve independent verifier restorations and their primary failures.

Refs #5475. Focused bridge regressions and the complete real-Hopper suite passed on macOS arm64 with Hopper 6.6.0-demo 42.6316032. The verifier used a temporary unavailable Ghidra override to meet its sole-candidate prerequisite; reporter Hopper 6.1 remains unverified.

bridge/hopper_bridge.py

@@ -236,6 +236,15 @@ def _name_matches(document, address, name):
     return observed == name or (not name and observed is None)
 
 
+def _bookmark_name(document, address):
+    getter = getattr(document, "getBookmarkName", None)
+    if not callable(getter):
+        raise CapabilityUnavailableError(
+            "Hopper's public Python API does not expose getBookmarkName"
+        )
+    return getter(address)
+
+
 def _address(document, value=None):
     """Keep explicit hexadecimal coordinates distinct from symbol names."""
     if value is None:
@@ -994,15 +1003,46 @@ def _dispatch(method, params):
         observed = getter(address)
         return observed == comment or (comment == "" and observed is None)
     if method == "list_bookmarks":
-        return [{"address": _hex(item), "name": document.getBookmarkName(item)} for item in document.getBookmarks()]
+        return [{"address": _hex(item), "name": _bookmark_name(document, item)} for item in document.getBookmarks()]
     if method == "set_bookmark":
         address = _address(document, params.get("address"))
         _segment(document, address)
         name = params.get("name")
         if name is not None:
             _api_text(name, "Bookmark name")
-        document.setBookmarkAtAddress(address, name)
-        return document.hasBookmarkAtAddress(address)
+        has_bookmark = getattr(document, "hasBookmarkAtAddress", None)
+        if not callable(has_bookmark):
+            raise CapabilityUnavailableError(
+                "Hopper's public Python API does not expose hasBookmarkAtAddress"
+            )
+        exists = has_bookmark(address)
+        if name is None and exists:
+            # Omission means preserve the existing bookmark and its name.
+            return True
+        if not callable(getattr(document, "getBookmarkName", None)):
+            raise CapabilityUnavailableError(
+                "Hopper's public Python API does not expose getBookmarkName"
+            )
+        if name == "" and exists:
+            rename = getattr(document, "renameBookmarkAtAddress", None)
+            if not callable(rename):
+                raise CapabilityUnavailableError(
+                    "Hopper's public Python API does not expose renameBookmarkAtAddress"
+                )
+            rename(address, name)
+        else:
+            setter = getattr(document, "setBookmarkAtAddress", None)
+            if not callable(setter):
+                raise CapabilityUnavailableError(
+                    "Hopper's public Python API does not expose setBookmarkAtAddress"
+                )
+            setter(address, name)
+        if not has_bookmark(address):
+            return False
+        observed = _bookmark_name(document, address)
+        if name is None:
+            return observed is None or observed == ""
+        return observed == name or (name == "" and observed is None)
     if method == "unset_bookmark":
         address = _address(document, params.get("address"))
         # Permit removing a legacy orphan bookmark, but do not report success