Only zero is empty, and the last day is worth reading

CHANGELOG.md

@@ -51,6 +51,14 @@ ADR-007 and ADR-002.
 
 ### Fixed
 
+- **A caption could eat the barcode.** The code box and the caption both grew,
+  so any caption took half the label and kept going: "BAY 12 PRESS LINE 1" on
+  1.00 x 0.50in stock left a 36px stub, which is a code that is present,
+  unscannable, and reads as one that failed to render. The caption now takes
+  only the room it needs and a CODE128 keeps at least 40% of the label, all of
+  it when stacked. A code that genuinely fails to render says so in the preview
+  now, in red, rather than leaving white space that looks like a label with no
+  code on it.
 - **The generator prints from inside the app shell.** It was a full-screen
   route with no sidebar and a narrow column of controls on the left. It is now
   an ordinary page - navigation, full width - and `style.css` hides the shell at
@@ -64,6 +72,14 @@ ADR-007 and ADR-002.
 
 ### Changed
 
+- **Settings on the left, labels on the right.** The controls were a narrow
+  column with the preview trailing underneath, so the labels being adjusted were
+  off the bottom of the screen. The preview is now a column of its own that
+  stays in view and scrolls by itself, and it folds back to one column on a
+  narrow window. Note for anyone changing it: that scrolling column is exactly
+  the kind of ancestor that clips a multi-page print to whatever was on screen,
+  so print resets its overflow - verified by printing a six-page two-sided run,
+  not by looking at the preview.
 - CSV parsing and page building moved out of the generator component into
   `plugins/tools/frontend/labelPages.js`, where the column contract and the
   two-sided page order are covered by tests.