Add Reliable Delivery launch pages, framework & platform guides, nav + dark theme updates

[Prateek32177]

Motivation

• Prepare a launch-ready “Reliable Delivery” anchor (/upstash) that leads messaging and CTAs for Upstash QStash BYOK, retries, DLQ, deduplication and replay.
• Surface framework and platform integration guidance to reduce friction for Next.js and Cloudflare deployments and clarify platform-specific signing (Ed25519) details for Fal AI and Replicate.
• Update the site to the pre-launch dark design language and make the Reliable Delivery nav item the most prominent entry point.

Description

• Added a new /upstash page with BYOK messaging, flow/feature cards, DLQ mock table and code examples (see app/upstash/page.tsx).
• Added framework guide pages at /frameworks/nextjs and /frameworks/cloudflare, and platform pages for /platforms/falai, /platforms/replicate, and /platforms/stripe with copy-ready TypeScript snippets and testing instructions (see app/frameworks/* and app/platforms/*).
• Introduced reusable components AnnouncementBanner (dismissible via localStorage) and SiteNav with the new prominent Reliable Delivery link and Frameworks dropdown (see components/announcement-banner.tsx and components/site-nav.tsx).
• Reworked global styles to the requested dark palette and responsive layout, and simplified font handling by removing build-time Google font fetch to avoid network build failures (app/globals.css and app/layout.tsx).
• Minor interactive UI: DLQ seed data and a replay button in the /upstash mock to demonstrate replay behavior, plus code blocks showing createWebhookHandler usage and DLQ/controls.replay examples.

Testing

• Ran npm run build and the production build completed successfully (static pages generated).
• Launched the dev server with npm run dev and captured a screenshot of /upstash via an automated Playwright script (artifact available).
• npm run lint could not complete because Next.js ESLint prompted for interactive setup in this environment, so linting was not validated automatically.

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Codex Task

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Project	Deployment	Actions	Updated (UTC)
ternui	Ready	Preview, Comment, Open in v0	Feb 27, 2026 2:41pm