fix(config_help): replace invalid --syntax flag with bat|ov pipeline

ov does not support --syntax/--syntax-name. Use bat --color=always piped
into ov --jump-target for syntax highlighting + line positioning. Fall
back to ov alone (section nav via --section-delimiter) when bat is absent.

functions/config_help.fish

@@ -47,23 +47,31 @@ function config_help --description 'Open the offline fish shell configuration ma
     end
 
     # ── Viewer fallback chain ────────────────────────────────────
-    if type -q ov
-        ov --syntax --syntax-name markdown \
-           --section-delimiter "^#" \
-           --section-header \
-           +"$start_line" "$doc_file"
+    # Best case: bat provides syntax color, ov provides paging + line jump.
+    # Section nav (,/.) is sacrificed when piping bat output because ANSI
+    # escape codes prevent ^# matching; use / to search instead.
+    if type -q ov; and type -q bat
+        bat --color=always --style=plain --language=markdown "$doc_file" \
+            | ov --jump-target "$start_line"
 
+    # ov alone: full section navigation with ,/. keys; no code highlighting.
+    else if type -q ov
+        ov --section-delimiter "^#" \
+           --section-header \
+           --jump-target "$start_line" \
+           "$doc_file"
+
+    # bat alone: syntax highlighting with built-in paging; no line jump.
     else if type -q bat
         if test $start_line -gt 1
-            # bat can't jump to a line in paging mode; show a hint instead
             set_color brblack
-            echo "note: bat pager active — use / to search for your section" >&2
+            echo "note: bat pager — use / to search for your section" >&2
             set_color normal
         end
         bat --language=markdown --paging=always "$doc_file"
 
+    # Pre-compiled man page (generated by CI after merge).
     else if test -f "$man_file"
-        # Pre-compiled man page as a pager-independent fallback
         man -l "$man_file"
 
     else if type -q less