blog: update website banner to "Hyprnote is now Char" and add rebrand blog post

[devin-ai-integration]

Summary

Replaces the "Backed by Y Combinator" homepage banner with a new "Hyprnote is now Char." banner that links to a new blog post explaining the rebrand story.

Banner (apps/web/src/routes/_view/index.tsx):

• Swaps the external <a> to YC with an internal <Link> to /blog/hyprnote-is-now-char
• Text changed from "Backed by Y Combinator" (with YC logo) → "Hyprnote is now Char."

Blog post (apps/web/content/articles/hyprnote-is-now-char.mdx):

• New featured article covering the origin of the Hyprnote name, the C&D letter, the search for a new name, and why char was chosen

Review & Testing Checklist for Human

• Confirm you're okay removing the YC social proof banner from the homepage — this completely replaces "Backed by Y Combinator" with the rebrand announcement
• Review blog post content for accuracy and tone — narrative was based on Slack context; verify details (dates, company names, people mentioned) are correct and ready for public
• Verify the blog post renders correctly — no coverImage is set, which differs from other featured articles; check how it appears on the blog index and the individual post page
• Test the banner link — click the banner on the homepage and confirm it navigates to /blog/hyprnote-is-now-char correctly

Notes

• The component is still named YCombinatorBanner internally — cosmetic only, no functional impact
• The Link component was already imported in the file
• Requested by @ComputelessComputer
• Devin session

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[devin-ai-integration]

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional findings.