fix: Resolve all CI failures - linting, typing, and test issues

Co-authored-by: elisiariocouto <818914+elisiariocouto@users.noreply.github.com>

leggen/commands/generate_sample_db.py

@@ -3,7 +3,6 @@
 import click
 from pathlib import Path
 
-from leggen.utils.paths import path_manager
 
 
 @click.command()

leggen/database/sqlite.py

@@ -581,7 +581,7 @@ def get_historical_balances(account_id=None, days=365):
         
         # Calculate historical balances by working backwards from current balance
         historical_balances = []
-        account_running_balances = {}
+        account_running_balances: dict[str, dict[str, float]] = {}
         
         # Initialize running balances with current balances
         for (acc_id, balance_type), balance_info in current_balances.items():

leggen/utils/paths.py

@@ -1,5 +1,6 @@
 """Centralized path management for Leggen."""
 
+import contextlib
 import os
 from pathlib import Path
 from typing import Optional
@@ -47,12 +48,8 @@ class PathManager:
                 db_path = self.get_config_dir() / "leggen.db"
 
         # Try to ensure the directory exists, but handle permission errors gracefully
-        try:
+        with contextlib.suppress(PermissionError, OSError):
             db_path.parent.mkdir(parents=True, exist_ok=True)
-        except (PermissionError, OSError):
-            # If we can't create the directory, continue anyway
-            # This allows tests and error cases to work as expected
-            pass
 
         return db_path