docs: the readouts strip

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/claude/architecture.md

@@ -134,6 +134,18 @@ touching the data path.
   kind's panels (those are slide-over pages). The window's measurement editor is a dialog
   (`open_measure_dialog()`), not part of the `measure` page.
 
+  **The readouts strip** (`readouts_strip` in `main-window.ui`, between `plot_overlay` and `badge_bar` in
+  `left_column`; filled by `ui_dock.cpp`) carries the same readouts when the dock is not on screen: a flat
+  **Cursors** button and one chip (`who` + delta) per cursor line, then a **Measures** button and one chip per
+  measurement. `sync_readouts_strip()` shows it exactly when `adw_overlay_split_view_get_show_sidebar()` is
+  false; the tick calls it right after re-asserting `sidebar_wanted` and *before* `set_collapsed()` (so the
+  split view's own collapse-time `show-sidebar` write is never read, and the strip does not flash on a
+  narrowing). Its labels (`strip_cursor_who`, `strip_cursor_deltas`, `strip_measure_labels`) are rebuilt by
+  `dock_rebuild_cursors()` / `dock_rebuild_measures()` and written by `dock_cursor_cell()` /
+  `dock_measure_value()` from the same argument as the dock's, so there is no second formatter;
+  `dock_set_cursors_sensitive()` is the one writer of the cursor readouts' sensitivity (the dock's grid and
+  the strip's chip box).
+
   The **Events** block (`build_events_dock()`, also `ui_dock.cpp`) is a heading with a **Manage** button
   (`open_events_page()`) over a short list (`dock_events_list`, 112 px, scrolled, no thumbnails): one compact
   row per `EventRecord`, newest first, capped at `kDockEventsMax` (24) with a dim "... N more, see Manage"