commerce: Use modal form to download CSV

The Commerce Bank website no longer allows navigating directly to
`Download.ashx`; doing so just returns a generic "we're sorry" error.
They appear to have added some CSRF protection or something that makes
this not work.  As a result, we have to go fill out the form on the
*Download Transactions* modal dialog in order to get the download to
work correctly.

xactfetch.py

@@ -421,21 +421,29 @@ class CommerceBank:
         self, from_date: datetime.date, to_date: datetime.date
     ) -> Path:
         log.info('Downloading transactions from %s to %s', from_date, to_date)
-        idx = self.page.url.rstrip('/').split('/')[-1]
-        href = (
-            f'Download.ashx?Index={idx}'
-            f'&From={from_date}&To={to_date}'
-            f'&Type=csv'
-            '&DurationOfMonths=6'
-        )
-        log.debug('Navigating to %s', href)
+        datefmt = '%m/%d/%Y'
+        self.page.get_by_role('link', name='Download Transactions').click()
+        self.page.wait_for_timeout(random.randint(750, 1250))
+        modal = self.page.locator('#download-transactions')
+        input_from = modal.locator('input[data-qaid=fromDate]')
+        input_from.click()
+        self.page.keyboard.press('Control+A')
+        self.page.keyboard.press('Delete')
+        self.page.keyboard.type(from_date.strftime(datefmt))
+        input_to = modal.locator('input[data-qaid=toDate]')
+        input_to.click()
+        self.page.keyboard.press('Control+A')
+        self.page.keyboard.press('Delete')
+        self.page.keyboard.type(to_date.strftime(datefmt))
+        modal.get_by_role('button', name='Select Type').click()
+        self.page.get_by_text('Comma Separated').click()
         with self.page.expect_download() as di:
-            self.page.evaluate(f'window.location.href = "{href}";')
+            self.page.get_by_role('button', name='Download').click()
             log.debug('Waiting for download to complete')
-        self.page.wait_for_timeout(random.randint(1000, 3000))
         path = di.value.path()
         assert path
         log.info('Downloaded transactions to %s', path)
+        modal.get_by_label('Close').click()
         return path
 
     def firefly_import(self, csv: Path, account: int, token: str) -> None: