Sync docs with recent plugin changes; formatting and placeholder cleanup

- Document the new Panel Text Color control on Woo Custom Product Tabs
  (dotjuice-elementor-tools-pro 20260817.1)
- Document Dark Mode Toggle now persisting site-wide (pages without the
  toggle) and applying before first paint (dotjuice-elementor-tools
  c33084e)
- Add blank line before headings following image captions across pro
  widget docs, so they render correctly
- Regenerate placeholder screenshots for pro widget and pagespeed docs
- Remove stray H1 from the free plugin marketing overview (post title
  already serves as H1, matching the other marketing files)
- Bump local dev port to 3080, drop unused site/docs/.gitkeep

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SZsdkGdZYtCS6hZaX92NQ6

docs/dotjuice-elementor-tools-pro/widgets/woo-quick-view-popup.md

@@ -6,12 +6,14 @@ Found in the Elementor panel under **Dotjuice → Woo Quick View Popup**. Requir
 
 ![The Woo Quick View Popup widget content settings](../assets/img/woo-quick-view-popup-controls.png)
 *Screenshot: the widget selected in the editor with the Content Source dropdown and Quick View Template selector visible.*
+
 ## How it works
 
 Place this widget inside an Elementor popup (nothing else needs to go in that popup — this widget fills it entirely). It renders as an iframe showing whichever product a shopper clicked a Quick View button for.
 
 ![The Quick View popup content on the front end](../assets/img/woo-quick-view-popup-frontend.png)
 *Screenshot: the inside of a Quick View popup showing the product image gallery, title, price, and add-to-cart options rendered by the popup widget.*
+
 ## Content settings
 
 | Setting | Default | What it does |