Fix labels in paginated plots with renamed layout scale (#661)

The previous reftest didn't catch this because it accidentally did a
meaningless conversion (uppercasing letters that were already uppercase)

```julia
df = (;
    subject = [1, 1, 2, 2],
    group = ["A", "B", "A", "B"],
    x = 1:4,
    y = 5:8,
)

spec = data(df) * mapping(:x, :y, layout = (:subject, :group) => tuple) * visual(Scatter)
scls = scales(
    Layout = (;
        categories = [(1, "A") => "One A", (2, "A") => "Two A", (1, "B") => "One B", (2, "B") => "Two B"]
    )
)
draw(spec, scls)
draw(paginate(spec, scls, layout = 3), 1)
```

## Before

<img width="593" alt="image"
src="https://github.com/user-attachments/assets/baa9f727-09ac-493c-b70b-40fc6048a609"
/>

## After

<img width="604" alt="image"
src="https://github.com/user-attachments/assets/94804856-9a6b-4ea3-b3d0-6d8fbe08079e"
/>

Author: jkrumbiegel

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## v0.10.7 - 2025-05-27
+
+- Fixed facet labels in paginated plots with a `Layout` scale in which categories were also relabeled using the `categories = pairs` mechanism [#661](https://github.com/MakieOrg/AlgebraOfGraphics.jl/pull/661).
+
 ## v0.10.6 - 2025-05-21
 
 - If available, column metadata with the key `"label"` will be used instead of the column name for determining a mapping's label [#660](https://github.com/MakieOrg/AlgebraOfGraphics.jl/pull/660).

Project.toml

@@ -1,7 +1,7 @@
 name = "AlgebraOfGraphics"
 uuid = "cbdf2221-f076-402e-a563-3d30da359d67"
 authors = ["Pietro Vertechi", "Julius Krumbiegel"]
-version = "0.10.6"
+version = "0.10.7"
 
 [deps]
 Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"

src/paginate.jl

@@ -130,6 +130,8 @@ function paginate_axes_grid(agrid::Matrix{AxisSpecEntries}; layout = nothing, ro
         paginated = Matrix{AxisSpecEntries}[]
         dvalues = datavalues(scale)
         pvalues = plotvalues(scale)
+        dlabels = datalabels(scale)
+
         for groupindices in Iterators.partition(eachindex(dvalues, pvalues), layout)
             # TODO: should the original wrap style be preserved? may depend on type, not everything will work
             wrapped_positions = apply_palette(wrapped(), 1:length(groupindices))
@@ -139,7 +141,7 @@ function paginate_axes_grid(agrid::Matrix{AxisSpecEntries}; layout = nothing, ro
                 dvalues[groupindices],
                 wrapped_positions,
                 scale.label,
-                (Accessors.@set props.categories = nothing), # categories are already baked in and should not be reapplied later
+                (Accessors.@set props.categories = dvalues[groupindices] .=> dlabels[groupindices]),
                 scale.aes,
             )
             new_catscales = merge_in_scale(catscales, AesLayout, sliced_scale)

test/reference_tests.jl

@@ -1221,6 +1221,18 @@ let
             draw(paginated, i)
         end
     end
+
+    paginated_2 = AlgebraOfGraphics.paginate(
+        spec,
+        scales(Layout = (; categories = cats -> reverse(cats) .=> ["Eee", "Ddd", "Ccc", "Bbb", "Aaa"]));
+        layout = 3
+    )
+
+    for i in 1:length(paginated_2)
+        reftest("pagination category labels layout page $i") do
+            draw(paginated_2, i)
+        end
+    end
 end
 
 let