docs(handoff): shell converted, left panel is next

HANDOFF.md

@@ -2,19 +2,22 @@
 
 ## State
 
-- Branch `main`, worktree clean. **Four design commits, unpushed** (push at your checkpoint):
-  `565b8db` DESIGN.md becomes the standard · `f2bf577` `Themes/Tokens.xaml` + guard ·
-  `84c335a` Inter/JetBrains Mono bundled · `4ef84f2` `Themes/Controls.xaml` converted.
+- Branch `main`, worktree clean. **Seven design commits, unpushed** (push at your checkpoint):
+  `565b8db` DESIGN.md standard · `f2bf577` Tokens.xaml + guard · `84c335a` fonts bundled ·
+  `ffdf3b6` sans wired into the window · `4ef84f2` Controls.xaml · `0275e30` shell
+  (top bar, window, scene strip; mono telemetry).
+- **The app is half-converted on purpose:** theme, shell and readouts are tokenised; the left
+  panel, preview pane and dialogs still carry the old palette.
 - `DESIGN.md` is normative; `Themes/Tokens.xaml` is its implementation. Blue `#38bdf8` is the
   only interactive accent; red `#ff5451` is live/record only; `#e94560` is retired from chrome.
 
 ## Next action
 
-Sweep the remaining surfaces to tokens, one per commit, adding each file to
-`DesignTokensTests.Converted_surfaces_carry_no_raw_colour`: `TopBar.xaml` + `MainWindow.xaml` +
-`SceneThumbnailStrip.xaml` (~30 hexes) → `LeftPanel.xaml` (101) → `PreviewPane.xaml` (110) →
-`OverlayHost.xaml` + dialogs (~85) → the VM/service brush literals (`MainViewModel.Streaming.cs`,
-`MainViewModel.Audio.cs`, `NotificationService.cs`).
+Continue the sweep, one surface per commit, adding each file to
+`DesignTokensTests.Converted_surfaces_carry_no_raw_colour`: `Controls/LeftPanel.xaml` (101 hexes)
+→ `Controls/PreviewPane.xaml` (110) → `Controls/OverlayHost.xaml` + the dialogs (~85) → the
+VM/service brush literals (`MainViewModel.Streaming.cs`, `MainViewModel.Audio.cs`,
+`NotificationService.cs`).
 
 ## Landmines