Fix TOC page references and song page footer

- Move \label outside dedup guard so it survives the real pass
  (measurement pass labels are discarded inside vbox)
- Song page footer now shows MO/PfLB/Liederbuch table matching TOC
- Fix TEXINPUTS to include output/ for .songtoc file access

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

songbook-style.sty

@@ -54,7 +54,6 @@
   chorus/named = false,
   chorus/numbered = false,
   after-song = \songendsection,
-  disable-measuring,
 }
 
 \setchords{
@@ -74,7 +73,9 @@
 \tl_new:N \l__sb_mo_tl
 \tl_new:N \l__sb_pflb_tl
 \tl_new:N \l__sb_num_tl
+\tl_new:N \l__sb_songid_tl
 \bool_new:N \g__sb_toc_opened_bool
+\seq_new:N \g__sb_written_seq
 
 % Lazy-open: only truncate the file when first song writes to it
 % This ensures the TOC reads the PREVIOUS run's data before truncation
@@ -94,10 +95,14 @@
 
 \cs_new_protected:Npn \writesongtoc
 {
+  % Use leadsheets song ID to skip duplicate calls (measurement pass)
+  \tl_set:NV \l__sb_songid_tl \l_leadsheets_current_song_id_tl
+  \seq_if_in:NVF \g__sb_written_seq \l__sb_songid_tl
+  {
+    \seq_gput_right:NV \g__sb_written_seq \l__sb_songid_tl
     \__sb_ensure_toc_open:
     \stepcounter{songnumber}
     \tl_set:Nx \l__sb_num_tl { \int_use:N \c@songnumber }
-  \label{song:\tl_use:N \l__sb_num_tl}
     \tl_set:Nx \l__sb_title_tl { \songproperty{title} }
     \tl_set:Nx \l__sb_mo_tl { \songproperty{mundorgel} }
     \tl_set:Nx \l__sb_pflb_tl { \songproperty{pfadfinderliederbuch} }
@@ -109,6 +114,11 @@
         { \l__sb_pflb_tl }
         { \exp_not:N \pageref { song: \l__sb_num_tl } }
     }
+  }
+  % Label MUST be outside guard: measurement pass label is discarded (inside vbox),
+  % but the real pass label survives and gets written to .aux
+  \tl_set:Nx \l__sb_num_tl { \int_use:N \c@songnumber }
+  \label{song:\tl_use:N \l__sb_num_tl}
 }
 \ExplSyntaxOff
 
@@ -172,18 +182,13 @@
     }%
   \endgroup
   \vspace{3mm}%
-  \begingroup\footnotesize
-    \noindent
-    \makebox[0.18\textwidth][c]{MO}%
-    \makebox[0.18\textwidth][c]{PfLB}%
-    \hfill\par\noindent
-    \makebox[0.18\textwidth][c]{%
-      \ifsongproperty{mundorgel}{\songproperty{mundorgel}}{}%
-    }%
-    \makebox[0.18\textwidth][c]{%
-      \ifsongproperty{pfadfinderliederbuch}{\songproperty{pfadfinderliederbuch}}{}%
-    }%
-    \hfill
+  \begingroup\footnotesize\centering
+    \begin{tabular}{ccc}
+      MO & PfLB & Liederbuch \\
+      \ifsongproperty{mundorgel}{\songproperty{mundorgel}}{} &
+      \ifsongproperty{pfadfinderliederbuch}{\songproperty{pfadfinderliederbuch}}{} &
+      \thepage
+    \end{tabular}\par
   \endgroup
   \newpage
 }