feat: add back to top button

[Rbh2733]

Summary

• add fixed "Back to Top" button matching site colors
• show/hide button on scroll and enable smooth scroll to top

Testing

• npm test (fails: ENOENT package.json)
• pytest

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https://chatgpt.com/codex/tasks/task_e_68a6a0c204e4832cbea5c823fb203027

Summary by Sourcery

Create a new interactive market outlook page featuring multiple themed sections, Chart.js visualizations, smooth scrolling with active navigation state, tabbed content switching, and a fixed Back to Top button.

New Features:

• Add market-outlook.html as a standalone interactive page with Tailwind CSS styling and Google Fonts
• Integrate Chart.js to render doughnut, bar, and radar charts for market data visualization
• Implement smooth scrolling navigation with sticky header and active section highlighting
• Introduce a tabbed sector deep dive section for dynamic content switching
• Add a fixed Back to Top button that appears after scrolling and smooth-scrolls to the top

[sourcery-ai]

Reviewer's Guide

Adds a new interactive Market Outlook HTML page featuring structured sections, Tailwind-based styling, Chart.js visualizations, enhanced navigation behaviors, and a fixed Back to Top button with smooth-scroll functionality.

File-Level Changes

Change	Details	Files
Add new Market Outlook page layout and styling	Create structured header and multiple content sections using Tailwind CSS Define custom font, color, and container styles in a <style> block Enable responsive grids and flex layouts for dashboards and lists	market-outlook.html
Integrate Chart.js for dynamic data visualizations	Establish defaultChartOptions and tooltip callbacks for consistency Initialize doughnut, bar, and radar charts with sample data Implement wrapLabel helper to format long labels	market-outlook.html
Implement Back to Top button functionality	Add a fixed button element with accessible aria-label and theme colors Use scroll event listeners to toggle the button’s hidden state Invoke window.scrollTo with smooth behavior on click	market-outlook.html
Enhance navigation and tab interactions	Apply 'scroll-smooth' class for native in-page smooth scrolling Listen to scroll events to update active-nav classes on links Build tab buttons to switch content in the Sector Deep Dive section	market-outlook.html

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