fix: Tufts SCO claim file attach — send_keys directly, skip button click

Clicking "Add a file" triggers input.click() which opens the OS-native
file picker that WebDriver can't control, causing send_keys on the
underlying input to fail with a message-less exception. The input is
already present in the DOM (display:none) so send_keys can target it
directly without the click.

apps/SeleniumService/selenium_TuftsSCO_claimSubmitWorker.py

@@ -752,27 +752,20 @@ class AutomationTuftsSCOClaimSubmit:
 
             print(f"[TuftsSCO Claim step5] Attaching: {abs_path}")
             try:
-                add_file_btn = WebDriverWait(self.driver, 10).until(
-                    EC.element_to_be_clickable((By.XPATH,
-                        "//button[.//span[contains(text(),'Add a file')]] | "
-                        "//button[contains(normalize-space(text()),'Add a file')] | "
-                        "//*[contains(text(),'Add a file') and (@role='button' or self::label)]"
-                    ))
-                )
-                self.driver.execute_script("arguments[0].scrollIntoView({block:'center'});", add_file_btn)
-                ActionChains(self.driver).move_to_element(add_file_btn).click().perform()
-                time.sleep(1)
-
-                file_input = WebDriverWait(self.driver, 8).until(
+                # Don't click the "Add a file" button: it's wired to the hidden
+                # <input type="file"> below, and clicking it triggers the OS-native
+                # file picker, which WebDriver cannot control. Send the path
+                # directly to the input instead (chromedriver allows send_keys on
+                # file inputs even while display:none).
+                file_input = WebDriverWait(self.driver, 10).until(
                     EC.presence_of_element_located((By.XPATH, "//input[@type='file']"))
                 )
-                self.driver.execute_script("arguments[0].style.display='block';", file_input)
                 file_input.send_keys(abs_path)
                 time.sleep(1.5)
                 print(f"[TuftsSCO Claim step5] Attached: {os.path.basename(abs_path)}")
                 attached += 1
             except Exception as e:
-                print(f"[TuftsSCO Claim step5] Could not attach {abs_path}: {e}")
+                print(f"[TuftsSCO Claim step5] Could not attach {abs_path}: {type(e).__name__}: {e}")
 
         print(f"[TuftsSCO Claim step5] Attached {attached}/{len(self.claimFiles)} file(s)")
         return "SUCCESS"