Day 20 — UI Polish & APP Refinement/Debugging

• Further developed the UI to be more presentable to users:
• Consistent color theme: light background, blue primary color, dark text, and light-gray section backgrounds
• Improved the title section with a larger blue title and a subtitle describing the application’s purpose.
• Redesigned the test configuration section by grouping the DNS target, number of tests, and delay controls into a single bordered panel.
  o Added recognizable DNS provider names to the target
  dropdown, such as Cloudflare and Google, instead of displaying only IP
  addresses.
• Added a clean border and light-gray background to test configuration panel to match Live Results section.
• Improved  Start Test button, including styling and a play-button icon.
• Worked on removing the default blue selection highlighting from the dropdown and customizing it renderer/colors.
• Redesigned LIVE RESULTS so it appears as a proper section heading above a bordered results box rather than relying on Swing’s default titled border.
• Added light-gray background + border to the Live Results panel for consistent dashboard-like appearance.
• Learned more about Swing layouts, panels, borders, colors, renderers, component alignment, etc.
• Core functionality is now running, with the desktop application connected to the existing ping backend and displaying latency statistics.