An Auto-dark-mode user reported being flashed by a white window every
evening, then switching to a dark palette by hand. That is two defects,
and only one of them is the missing feature.
The flash fired even for someone who had already saved a dark palette.
`index.html` hardcoded `data-theme="white"` while the code that reads the
stored theme, `initializeTheme()`, only runs after the app bundle's
dynamic imports resolve. So every launch painted white first. A
synchronous inline script now resolves the theme before any stylesheet is
parsed, and Electron seeds `backgroundColor` from a cached appearance so
the window is not white before the renderer's first frame either.
Following the system is a switch in Settings -> General rather than a
seventh palette. The OS only reports dark/light while the app ships six
palettes, so each ground carries its own preference: the picker splits
into "use in light mode" (the four paper grounds) and "use in dark mode"
(the two ink ones), and a pick lands in the preference for its own ground.
Choosing ink-blue at noon is therefore remembered for that night rather
than fighting the OS. Detection goes through `prefers-color-scheme`
because the same renderer runs under Electron, the Tauri shell and the
browser entry, and the media query is the only signal all three share.
New installs follow the system; existing ones keep their fixed palette
until they opt in, so an update never silently repaints someone's app.
`nativeTheme.themeSource` is deliberately left alone, which is the part
most likely to be "fixed" later. Pinning it to the user's palette would
make context menus and the macOS frame agree with the app, but it is a
process-wide override of `prefers-color-scheme` — the very signal this
feature reads. Re-enabling the switch would then resolve against the
pinned value instead of the real OS setting, and the override also leaks
into the preview WebContentsView, forcing third-party pages to the app's
theme. A test fails on any assignment to it.
The OS-flip listener reads the preferences from storage rather than from
its own store. The pet and trace windows run the same bootstrap with
their own store instance over one shared localStorage, so after the main
window turns the switch off their in-memory copy still says "on" — acting
on it wrote the user's choice straight back out. A `storage` listener
catches the other windows up.
`settingsStore.theme` is gone. It was a copy that only refreshed on an
explicit `setTheme`, so an OS flip left the Settings picker highlighting
a palette that was no longer on screen. uiStore owns the theme; the copy
had no remaining readers.
The 「纸·墨·印」 rename reaches the new keys too: `light` -> `warm-classic`
now migrates for the per-ground preferences, not just the applied theme,
so the palette daytime returns to is not silently reset.
Guards, each verified by breaking what it protects: the inline script is
extracted from `index.html` and run verbatim against `resolveAppliedTheme`
over every stored combination — including dirty values, which are
reachable because it runs before the persistence migrations, and
cross-ground values like a dark palette stored as the light preference;
the three copies of the palette grounds (CSS `--cc-bg`, `index.html`,
main process) are pinned to each other and to `THEME_MODES`, so a seventh
palette cannot ship without a pre-paint color; the two grounds are proven
to cover every palette at compile time; and the IPC payload is held to a
literal 6-digit hex because `setBackgroundColor` also accepts
`#AARRGGBB`, where a translucent window means click-through and overlay
spoofing.
Tested: cd desktop && bun run test --run src/lib/desktopHost/contract.test.ts src/pages/TerminalSettings.test.tsx src/lib/desktopHost/electronHost.test.ts electron/ipc/capabilities.test.ts
Tested: cd desktop && bun run lint
Tested: bun run check:desktop
Tested: bun run check:native
Not-tested: bun run check:coverage
Confidence: high
Scope-risk: moderate
Remove the Windows renderer-side drag delta fallback and keep frameless window movement on Electron app-region handling. Reject drag movement payloads on the legacy IPC channel so window drags cannot mutate bounds through repeated setPosition calls.
Tested: cd desktop && bun run test --run src/hooks/useElectronWindowDragRegions.test.tsx electron/ipc/capabilities.test.ts src/lib/desktopHost/electronHost.test.ts
Tested: bun run check:desktop
Tested: bun run check:native
Confidence: high
Scope-risk: narrow
Tested:
- cd desktop && bun run test -- --run src/pages/TraceList.test.tsx
- bun test src/server/__tests__/trace-capture.test.ts
- bun run check:desktop
- bun run check:server
Scope-risk: broad
Use frameless Electron chrome only on Windows and remove the native Windows application menu so the packaged app matches the previous Tauri-style desktop surface.
Add a Windows-only manual drag fallback for desktop drag regions, while excluding tab reorder targets and preserving macOS/Linux native chrome and menu behavior.
Tested: cd desktop && bun run test --run electron/services/menu.test.ts electron/services/windows.test.ts src/hooks/useElectronWindowDragRegions.test.tsx src/components/layout/TabBar.test.tsx src/components/layout/Sidebar.test.tsx src/lib/desktopHost/electronHost.test.ts electron/ipc/capabilities.test.ts
Tested: cd desktop && SKIP_INSTALL=1 bun run build:windows-x64
Tested: Computer Use Windows packaged app smoke verified no native menu, custom controls, drag regions, tab reorder, close-to-background, and deepseek-v4-pro provider response FINAL_WINDOWS_ELECTRON_REAL_PROVIDER_OK.
Not-tested: full bun run verify.
Constraint: keep custom frameless behavior scoped to win32 so macOS and Linux native chrome paths remain intact.
Confidence: high
Scope-risk: moderate
Introduce the Electron desktop shell alongside the existing React renderer and local Bun server boundary. The migration keeps the DesktopHost contract explicit across Tauri, Electron, and browser runtimes while adding Electron main/preload services for dialogs, shell, notifications, updates, tray/window lifecycle, terminal, preview WebContentsView, app mode, and release/package validation.
The commit also carries the latest local main desktop command updates, including agent slash entries and hidden-by-default markdown thinking details, so the packaged Electron build matches the current main UX surface.
Constraint: React renderer, local Bun server, REST/WebSocket, and sidecar boundaries must remain reusable during the migration
Constraint: macOS dev packages are ad-hoc signed and cannot prove Developer ID notarization or Gatekeeper release launch
Rejected: Browser-only smoke validation | it cannot exercise native dialogs, keychain prompts, notification behavior, or packaged app startup
Confidence: medium
Scope-risk: broad
Directive: Do not remove Tauri host support until signed Electron release artifacts pass native OS smoke on macOS, Windows, and Linux
Tested: bun run check:desktop
Tested: cd desktop && bun run check:electron
Tested: CSC_IDENTITY_AUTO_DISCOVERY=false bun run electron📦dir
Tested: bun run test:package-smoke --platform macos --package-kind dir --artifacts-dir desktop/build-artifacts/electron
Tested: Computer Use read packaged Electron app window at desktop/build-artifacts/electron/mac-arm64/Claude Code Haha.app
Not-tested: Developer ID signed/notarized Gatekeeper launch
Not-tested: Real OS notification click-to-session action
Not-tested: Windows and Linux packaged app smoke on real hosts
