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/httpx/_transports/mock.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+import typing
+
+from .._models import Request, Response
+from .base import AsyncBaseTransport, BaseTransport
+
+SyncHandler = typing.Callable[[Request], Response]
+AsyncHandler = typing.Callable[[Request], typing.Coroutine[None, None, Response]]
+
+
+__all__ = ["MockTransport"]
+
+
+class MockTransport(AsyncBaseTransport, BaseTransport):
+    def __init__(self, handler: SyncHandler | AsyncHandler) -> None:
+        self.handler = handler
+
+    def handle_request(
+        self,
+        request: Request,
+    ) -> Response:
+        request.read()
+        response = self.handler(request)
+        if not isinstance(response, Response):  # pragma: no cover
+            raise TypeError("Cannot use an async handler in a sync Client")
+        return response
+
+    async def handle_async_request(
+        self,
+        request: Request,
+    ) -> Response:
+        await request.aread()
+        response = self.handler(request)
+
+        # Allow handler to *optionally* be an `async` function.
+        # If it is, then the `response` variable need to be awaited to actually
+        # return the result.
+
+        if not isinstance(response, Response):
+            response = await response
+
+        return response