Charon v1.17.0

Changes since v1.16.1

• chore(release): v1.17.0
• docs(agents): record the design system, the site, and the preview harness
• chore(assets): regenerate screenshots and the social card
• feat(design): add a browser preview harness for judging UI changes
• feat(site): carry the new identity onto the marketing site and cut slop
• feat(design): rebuild the visual identity as a charcoal instrument panel
• chore(release): v1.16.1

Full changelog: v1.16.1...v1.17.0

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macOS build (universal: Apple Silicon + Intel), code-signed and notarized. The app self-updates from this release onward.