feat(config): sigla_style, sigla_book and sigla_tradition

Same flag > config > default precedence as --lang, and each reported by
config --show with its source, so an override is visible rather than
mysterious.

A language file's [sigla] section IS a style; a config key SELECTS one and
may override settings within it -- the two are not a duplicate setting.

1 files changed, 34 insertions, 1 deletions

diff --git a/test/test_config.ml b/test/test_config.ml
index 83da015..d348d9b 100644
--- a/test/test_config.ml
+++ b/test/test_config.ml
@@ -102,6 +102,35 @@ let test_two_defaults_blocks_report_no_unknown_sections () =
   let c = ok (C.of_string text) in
   Alcotest.(check (list string)) "no unknown sections" [] (C.unknown_sections c)
 
+(* Task 8: sigla_style/sigla_book/sigla_tradition read the same way
+   lang/template/format do, in the same [\[defaults\]] section -- no new
+   section, and every key recognised (so [unknown_keys] stays empty). *)
+let test_sigla_keys_are_read () =
+  let text =
+    "[defaults]\nsigla_style = la\nsigla_book = full\nsigla_tradition = modern\n"
+  in
+  match C.of_string text with
+  | Error e -> Alcotest.failf "parse: %s" e
+  | Ok c ->
+      Alcotest.(check (option string)) "style" (Some "la") (C.sigla_style c);
+      Alcotest.(check (option string)) "book" (Some "full") (C.sigla_book c);
+      Alcotest.(check (option string)) "tradition" (Some "modern") (C.sigla_tradition c);
+      Alcotest.(check (list string)) "nothing unknown" [] (C.unknown_keys c)
+
+(* The empty config carries no sigla settings either -- same "all None"
+   contract [test_empty_config_is_all_none] already asserts for lang. *)
+let test_empty_config_sigla_keys_are_none () =
+  Alcotest.(check (option string)) "sigla_style" None (C.sigla_style C.empty);
+  Alcotest.(check (option string)) "sigla_book" None (C.sigla_book C.empty);
+  Alcotest.(check (option string)) "sigla_tradition" None (C.sigla_tradition C.empty)
+
+(* Same last-wins duplicate policy as lang/template/format: a key repeated
+   across two [\[defaults\]] blocks resolves to the LATER block's value. *)
+let test_sigla_key_repeated_across_blocks_last_wins () =
+  let text = "[defaults]\nsigla_book = full\n\n[defaults]\nsigla_book = abbr\n" in
+  let c = ok (C.of_string text) in
+  Alcotest.(check (option string)) "later block's sigla_book wins" (Some "abbr") (C.sigla_book c)
+
 let suite =
   ( "Config",
     [ Alcotest.test_case "reads defaults" `Quick test_reads_defaults;
@@ -119,4 +148,8 @@ let suite =
       Alcotest.test_case "overlays accumulate across blocks"
         `Quick test_overlays_accumulate_across_blocks;
       Alcotest.test_case "two defaults blocks report no unknown sections"
-        `Quick test_two_defaults_blocks_report_no_unknown_sections ] )
+        `Quick test_two_defaults_blocks_report_no_unknown_sections;
+      Alcotest.test_case "sigla keys are read" `Quick test_sigla_keys_are_read;
+      Alcotest.test_case "empty config sigla keys are none" `Quick test_empty_config_sigla_keys_are_none;
+      Alcotest.test_case "sigla key repeated across blocks last wins"
+        `Quick test_sigla_key_repeated_across_blocks_last_wins ] )