Add theming system with built-in palettes and custom theme editor - #1
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Introduce a full theming layer for the web app: - Theme registry (apps/web/src/themes/) with 11 built-in palettes: Default, Solarized, Nord, High Contrast, Catppuccin (Latte/Frappe/ Macchiato/Mocha), and Rose Pine (Dawn/main/Moon). - Custom themes: duplicate, edit, and delete palettes via a new ThemeEditor, persisted to localStorage with import/export transport. - Separate active light/dark theme selection wired through useTheme, with cross-tab sync. - New Appearance settings page (moved theme controls out of General). - Syntax highlighting follows the active palette (Catppuccin code renders with catppuccin-* Shiki themes, Rose Pine with rose-pine*), falling back to the generic Pierre theme; highlighter cache keyed by theme so palette switches load the right bundled theme. - Scrollbar/noise styling driven by CSS variables so palettes can override them. Covered by unit tests for the registry, transport, theme editor, and syntax-theme resolution. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Adds a full theming layer to the web app — built-in palettes, a custom theme editor, and palette-aware syntax highlighting.
ThemeEditor, persisted tolocalStoragewith import/export transport.useTheme, with cross-tab sync.catppuccin-*Shiki themes, Rosé Pine withrose-pine*, falling back to the generic Pierre theme. Highlighter cache keyed by theme so palette switches load the right bundled theme.No new dependencies — the Catppuccin/Rosé Pine Shiki themes are already bundled in
@pierre/diffs.Testing
tsgo --noEmittypecheck: clean.🤖 Generated with Claude Code