rename flow talk to paper

[kualta]

Summary

• Rebrand "Flow Talk" → "Paper" across the app, docs (en/zh/jp), package metadata, GHCR image, and GitHub URLs
• Update default site URL to https://paper.flow.industries; remove the now-backwards paper.ink → flow.talk redirect from middleware
• On-chain ECP target URI: writes now emit app://paper.flow.industries; main-feed read path runs parallel queries against app://flow.talk (old) and app://paper.flow.industries (new) and merges, with a compound base64-encoded cursor so existing posts stay visible

Risk areas

• Main feed: the targetUri filter previously used https://flow.talk (a value that didn't match what writes were emitting). The refactor switches to the on-chain app:// scheme used by writes, which is more correct but is a behavioral change. Worth eyeballing on a dev indexer.
• Cursor format: the main feed now uses a compound {o, n} base64 cursor. Legacy single-string cursors are interpreted as the "old URI" cursor for back-compat.

Out of scope (separate PRs)

• Renaming the GitHub repo flow-industries/talk → flow-industries/paper (must wait until this PR merges so CI publishes the renamed GHCR image)
• Iron deployment cutover (flow.talk → paper.flow.industries)
• Consumer updates in site and bots
• auth/ allowlist intentionally left unchanged per direction

Test plan

• bunx tsc --noEmit — confirm only pre-existing errors (XMTP/fumadocs module resolution)
• bun run check — confirm only pre-existing biome diagnostics
• Manual smoke on localhost:3010: tab title says "Paper", login flow, main feed renders
• Verify main feed shows pre-rename posts (tagged app://flow.talk) — published via the existing app
• Publish a new post and confirm it carries app://paper.flow.industries on-chain and appears in the merged feed
• OG image / share preview shows "Paper" branding

Note: this PR also includes biome --write --unsafe autofixes to several XMTP/messaging files, since bun run check is configured to autofix as part of the standard pre-commit step.

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Project	Deployment	Actions	Updated (UTC)
talk	Ready	Preview, Comment	May 2, 2026 5:14pm