Fix project isolation: Make loadChatHistory respect active project sessions

- Modified loadChatHistory() to check for active project before fetching all sessions
- When active project exists, use project.sessions instead of fetching from API
- Added detailed console logging to debug session filtering
- This prevents ALL sessions from appearing in every project's sidebar

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.venv/lib/python3.11/site-packages/referencing/_attrs.pyi

@@ -0,0 +1,21 @@
+from collections.abc import Callable
+from typing import Any, TypeVar
+
+from attr import attrib, field
+
+class UnsupportedSubclassing(Exception): ...
+
+_T = TypeVar("_T")
+
+def __dataclass_transform__(
+    *,
+    frozen_default: bool = False,
+    field_descriptors: tuple[type | Callable[..., Any], ...] = ...,
+) -> Callable[[_T], _T]: ...
+@__dataclass_transform__(field_descriptors=(attrib, field))
+def define(cls: type[_T]) -> type[_T]: ...
+@__dataclass_transform__(
+    frozen_default=True,
+    field_descriptors=(attrib, field),
+)
+def frozen(cls: type[_T]) -> type[_T]: ...