[shuv1337]

Summary

Use the upstream Ocean palette in dark mode as the implicit default instead of the fork's standard palette/System appearance. Stored palette and Light/System appearance choices still win; S2Code remains available and Ocean's colors are unchanged. Mobile's independent preference resolver also defaults to Ocean dark; desktop uses the shared web resolver and desktop theme bridge.

Remove the starry sidebar header artwork for every theme/channel while keeping the wordmark, navigation controls and theme-aware control colors. Preserve artwork still used by the composer send button.

Fix device-default restoration to match the new default: fresh installs have nothing to restore, and restoring clears explicit palette, appearance, legacy follow-system and mix keys instead of selecting System. Preference-presence flags are part of the reactive theme snapshot, so clearing even explicit Ocean/dark preferences updates the button immediately. Failed clears retain the previous stored preferences.

Preserve the legacy theme=system + theme-follow-system=false light appearance in both boot and runtime. Remove boot fallback/selection branches made unreachable by the normalized Ocean default.

Base and scope

Based on main, including #437 merged as 7a72a3f22345. Merged origin/main into this branch with merge commit 0e64b516ea19be03980d8bb0fe45ef830a5c5b30; no rebase or force push. The PR diff against main contains only the Ocean-default/plain-header change and its regression fixes.

Verification

• New boot/runtime parity rows and device-restore browser tests reproduce the reported failures before the fix.
• 138 tests across 10 affected web/mobile/desktop suites pass, including fresh-install restore availability, clearing explicit and legacy preferences/mixes, reactive dirty-state updates, and storage-failure rollback.
• vp run check:changed origin/main: changed-file lint, both knip passes, all three affected package typechecks, adjacent tests and React Compiler checks pass. Its formatter still hits the existing local formatter-resolution issue (pc_a14f73980ba6); direct oxfmt --check with the exact exported vite.config.ts fmt configuration passes all 13 changed files. git diff --check passes.
• Original integrated preview verification: light OS + fresh preferences resolves to Ocean dark with no sidebar artwork; explicit S2Code Light and Grove Light survive reload; light-theme controls remain readable. This implementation sub-agent did not launch another dev server.
• Before/after screenshot evidence on GitHub: download the self-contained HTML to view its embedded PNGs. No evidence assets are committed.
• Final-head GitHub CI: CI and CI Full / Test Web requested for 66a95eabc0c2a061f1db5e489fe3da3ca28918f6; results pending.

Implemented and updated with GPT-6.1-Sol in pi (shuvpi).