Position Clash as a creative platform for agents

[hrhrng]

Summary

• preserve the product philosophy: Where agents co-create, humans are welcome too.
• position Clash as a creative platform for agents, with Desktop as its current home; Canvas, Timeline, and Director Stage are tools agents can use, not the product definition
• replace the legacy Clash/ wordmark with the current Clash agent logo across the landing navigation and footer
• add real macOS, Windows, and Linux preview download routes plus canonical, Open Graph, robots, sitemap, package keywords, GitHub topics, and a social preview that visibly includes Canvas, Timeline, and Director Stage
• add cross-platform desktop packaging jobs to CI and a rolling desktop-preview release with stable asset names
• harden universal macOS, Windows, and Linux packaging for Electron 42, pnpm optional architectures, platform-native ACP/CLI preparation, and native dependency filtering
• eliminate a CLI observation-lock race exposed by the complete CI suite

Validation

• make lint
• Web: 11 files / 41 tests
• Desktop: 13 files / 90 tests
• CLI: 320 Node tests + 16 Vitest tests; observation concurrency stress repeated 20 times
• Web, Web UI, and Desktop type-checks
• Web production build
• pnpm install --frozen-lockfile
• local Clash-Desktop-macOS-universal.dmg build (442 MB), hdiutil verify, and mounted binary architecture checks for Electron, Claude SDK, and Remotion
• GitHub CI cross-platform installers:
  • Clash-Desktop-macOS-universal.dmg
  • Clash-Desktop-Windows-x64.exe
  • Clash-Desktop-Linux-x64.AppImage
• desktop and 390px mobile visual QA for / and /download, including the current agent logo and horizontal-overflow checks