Improve SEO: meta, structured data, robots/sitemap, static H1

[danmooney]

Move the H1 + subheading into static index.html so crawlers see them without rendering JS. Add canonical, Open Graph/Twitter cards, theme-color, preconnect, a tighter meta description, and section anchor IDs. Embed WebApplication + FAQPage JSON-LD. Ship robots.txt and sitemap.xml. Mirror canonical/OG on privacy.html. Move font-family + body reset onto body so the H1 outside .app keeps the system font stack.

Summary by CodeRabbit

• New Features

  • Added comprehensive About section featuring detailed explanations of Python dictionaries, JSON format comparisons, and practical use cases for the converter tool.

• Style

  • Minor spacing adjustments to heading element margins for improved visual layout.

• Chores

  • Enhanced search engine optimization through improved metadata tags and social media sharing support.
  • Added XML sitemap and search engine configuration for improved discoverability and indexing.
  • Updated privacy policy page metadata and structured data.

[coderabbitai]

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📝 Walkthrough

Walkthrough

This PR enhances the dict2json site by adding search engine discovery infrastructure, expanding homepage content with detailed informational sections, and updating SEO metadata across public pages. The changes coordinate robots.txt directives, XML sitemap generation, enriched metadata tags, new anchored content sections, and minor styling adjustments.

Changes

SEO and Homepage Enhancement

Layer / File(s)	Summary
Search Engine Discovery and Crawlability .gitignore, public/robots.txt, public/sitemap.xml, public/privacy.html	Adds robots.txt with universal crawling rules and sitemap reference; creates sitemap.xml listing home and privacy URLs; updates .gitignore to un-ignore these files; enhances privacy.html head with robots directive, canonical link, and Open Graph tags.
Homepage Content and Structure Redesign src/index.html	Expands page metadata with updated title, description, theme color, canonical link, and enriched Open Graph/Twitter/JSON-LD schema; restructures body to add an About section with anchored subsections: What is a Python Dictionary, What is JSON, Converting Between Formats, and Common Use Cases.
Component and Styling Updates src/App.js, src/styles/layout.css	Removes static "Python Dict to JSON Converter" heading from App component; adjusts h1 top margin from 0 to 20px to accommodate new page structure.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• danmooney/dict2json#4: Both PRs modify public/privacy.html—this PR updates SEO metadata in the head, while the related PR adds styling and adjusts privacy link behavior.
• danmooney/dict2json#3: Both PRs affect the privacy page; this PR enhances its metadata, while the related PR introduced the privacy policy page itself.

Poem

🐰 With robots.txt to guide the crawlers true,
And sitemap entries, both old and new,
The homepage blooms with sections deep—
What Python dicts and JSON keep!
Now search engines find their way,
And readers learn what words convey. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title accurately describes the main objective: improving SEO through metadata, structured data (JSON-LD), robots.txt/sitemap, and moving the H1 heading to static HTML.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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