drive the misc cards scrolling with wheel input instead of fixed bursts

The card loop fired fixed 100px scroll events back to back with no pauses, which is the jumpy scrolling, and its while-not-in-viewport loop was unbounded, so a card that never fits the viewport completely would hang the run forever. The way back up unwound a counted number of steps, which lands wrong when the page height changes while cards update.

Scrolling is now wheel input with varying step sizes and short pauses, bounded, aimed at centering the target. The return reads the actual scroll position instead of counting.

src/rewards_tasks.py

@@ -7,7 +7,6 @@ from selenium.webdriver.common.by import By
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.common.keys import Keys
 from selenium.webdriver.remote.webelement import WebElement
-from selenium.webdriver.common.action_chains import ActionChains
 from selenium.common.exceptions import StaleElementReferenceException, TimeoutException, NoSuchElementException
 import tab_utils
 import llm_utils
@@ -140,12 +139,8 @@ class RewardsTaskUtils:
 
 		misc_cards: list[WebElement] = self.wait_for_element(self.elements.get_all_misc_cards)
 
-		scroll_times = 0
-
 		for card in misc_cards:
-			while not self.elements.element_is_fully_in_viewport(card): # this should work for top-down iteration
-				ActionChains(self.driver).scroll_by_amount(0, 100).perform()
-				scroll_times+=1
+			self.mouse.wheel_scroll_element_into_view(card)
 
 			if not self.elements.card_is_complete(card) and self.elements.get_card_point_value(card) > 0:
 				self.move_to_and_click(card)
@@ -158,8 +153,7 @@ class RewardsTaskUtils:
 
 		self.tab_utils.close_all_other_tabs()
 
-		for i in range(scroll_times):
-			ActionChains(self.driver).scroll_by_amount(0, -100).perform() # scroll back to top of page
+		self.mouse.wheel_scroll_to_top()
 
 	def complete_required_searches(self, max_rounds: int = 6):
 		# Points per search are not fixed. Some markets award 3 rather than 5,