feat: add info icon with filter logic popover to For You feed

Adds a clickable info icon next to the "For You" title that displays a popover explaining the feed's filtering logic ("Most Recent Video - Disinterests Tags - Watch History + Interests Tags"). Implemented as a reusable helper `attachFeedInfoPopover` in `js/ui/components/FeedInfoPopover.js` to support future use on other feed pages. Updated `views/for-you.html` and `js/forYouView.js` to integrate the new component. Verified with Playwright.

verification/verify_feed_info.py

@@ -0,0 +1,54 @@
+import sys
+import os
+import time
+from playwright.sync_api import sync_playwright
+
+def verify_feed_info(page):
+    print("Pre-seeding localStorage...")
+    page.goto("http://localhost:8000") # Go to root first to set storage origin
+    page.evaluate("window.localStorage.setItem('hasSeenDisclaimer', 'true')")
+
+    print("Navigating to For You view...")
+    page.goto("http://localhost:8000/#view=for-you")
+
+    print("Waiting for feed info trigger...")
+    trigger = page.locator("#feedInfoTrigger")
+    try:
+        trigger.wait_for(state="visible", timeout=10000)
+    except Exception:
+        page.screenshot(path="verification/debug_not_found.png")
+        raise
+
+    # Ensure no modals are blocking
+    # We can try to force click or wait for potential overlays to disappear
+    # But pre-seeding should handle the main one.
+
+    print("Clicking trigger...")
+    trigger.click()
+
+    print("Waiting for popover...")
+    popover = page.locator(".popover-panel")
+    popover.wait_for(state="visible", timeout=5000)
+
+    text = popover.inner_text()
+    print(f"Popover text: {text}")
+
+    expected = "Most Recent Video - Disinterests Tags - Watch History + Interests Tags"
+    if expected not in text:
+        raise Exception(f"Unexpected text: {text}")
+
+    page.screenshot(path="verification/feed_info.png")
+    print("Screenshot saved to verification/feed_info.png")
+
+if __name__ == "__main__":
+    with sync_playwright() as p:
+        browser = p.chromium.launch(headless=True)
+        context = browser.new_context()
+        page = context.new_page()
+        try:
+            verify_feed_info(page)
+        except Exception as e:
+            print(f"Error: {e}")
+            sys.exit(1)
+        finally:
+            browser.close()