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/bcrypt/__init__.pyi

@@ -0,0 +1,10 @@
+def gensalt(rounds: int = 12, prefix: bytes = b"2b") -> bytes: ...
+def hashpw(password: bytes, salt: bytes) -> bytes: ...
+def checkpw(password: bytes, hashed_password: bytes) -> bool: ...
+def kdf(
+    password: bytes,
+    salt: bytes,
+    desired_key_bytes: int,
+    rounds: int,
+    ignore_few_rounds: bool = False,
+) -> bytes: ...