Use BQL query for get_all_accounts() instead of non-existent API endpoint

fava_client.py

@@ -818,7 +818,7 @@ class FavaClient:
 
     async def get_all_accounts(self) -> List[Dict[str, Any]]:
         """
-        Get all accounts from Beancount/Fava.
+        Get all accounts from Beancount/Fava using BQL query.
 
         Returns:
             List of account dictionaries:
@@ -834,29 +834,25 @@ class FavaClient:
                 print(acc["account"])  # "Assets:Cash"
         """
         try:
-            # Use Fava's /api/accounts endpoint
-            async with httpx.AsyncClient(timeout=self.timeout) as client:
-                response = await client.get(f"{self.base_url}/accounts")
-                response.raise_for_status()
-                accounts_data = response.json()
+            # Use BQL to get all unique accounts
+            query = "SELECT DISTINCT account"
+            result = await self.query_bql(query)
 
-                # Fava returns array of account names
-                # We need to convert to dict format expected by account_sync
-                accounts = []
-                for acc_name in accounts_data:
+            # Convert BQL result to expected format
+            accounts = []
+            for row in result["rows"]:
+                account_name = row[0] if isinstance(row, list) else row.get("account")
+                if account_name:
                     accounts.append({
-                        "account": acc_name,
-                        "meta": {}  # Fava /api/accounts doesn't include metadata
+                        "account": account_name,
+                        "meta": {}  # BQL doesn't return metadata easily
                     })
 
-                logger.debug(f"Fava returned {len(accounts)} accounts")
-                return accounts
+            logger.debug(f"Fava returned {len(accounts)} accounts via BQL")
+            return accounts
 
-        except httpx.HTTPStatusError as e:
-            logger.error(f"Fava accounts error: {e.response.status_code} - {e.response.text}")
-            raise
-        except httpx.RequestError as e:
-            logger.error(f"Fava connection error: {e}")
+        except Exception as e:
+            logger.error(f"Failed to fetch accounts via BQL: {e}")
             raise
 
     async def get_journal_entries(self) -> List[Dict[str, Any]]: