fix spacechar on first page

CHANGELOG.md

@@ -10,6 +10,9 @@ this project uses date-based 'snapshot' version identifiers.
  - \tag_spacechar_on:, \tag_spacechar_off: to locally switch off 
    the real space chars.  
 
+### Fixed
+ - spacechar in floats on the first page   
+
 ## [2024-03-27]
 Version 0.99a
 ### Fixed

tagpdf-space.dtx

@@ -106,8 +106,8 @@
         \pdfglyphtounicode{space}{0020}
         \keys_define:nn { @@ / setup }
           {
-            activate/spaces/true .code:n  = { \pdfinterwordspaceon },
-            activate/spaces/false .code:n = { \pdfinterwordspaceoff },
+            activate/spaces/true .code:n  = { \AddToHook{shipout/firstpage}[tagpdf/space]{\pdfinterwordspaceon} },
+            activate/spaces/false .code:n = { \RemoveFromHook{shipout/firstpage}[tagpdf/space] },
             activate/spaces .default:n = true,
           }
       }

testfiles/spacechar-float.luatex.tpf

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testfiles/spacechar-float.pvt

@@ -0,0 +1,13 @@
+% this tests if space chars with floats on the first page are correctly handled.
+\DocumentMetadata{testphase=phase-III,xmp=false}
+\input{regression-test}
+\documentclass{report}
+\begin{document}\showoutput
+aaa aaa
+
+\begin{figure}
+bbb bbb 
+\end{figure}
+
+
+\end{document}