M3: Tabs and the window title show the document title when Initial View asks for it (DisplayDocTitle); parity for setting the document language

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

parity/acrobat-features.toml

@@ -8863,11 +8863,11 @@ title = "Set document language"
 area = "M"
 tier = "P1"
 milestone = "M12"
-status = "planned"
-commands = []
-tools = []
-evidence = []
-notes = ""
+status = "shipped"
+commands = ["file.properties"]
+tools = ["doc_initial_view"]
+evidence = ["crates/organize/src/tests.rs::initial_view_round_trips_and_keeps_scripts", "crates/automation/tests/automation.rs::initial_view_through_tools", "crates/ui-egui/tests/viewer.rs::initial_view_is_edited_and_honoured_on_open"]
+notes = "Document Properties ▸ Initial View ▸ Language (catalog /Lang)"
 
 [[feature]]
 id = "a11y.set-title-display"
@@ -8875,11 +8875,11 @@ title = "Show the document title in the window"
 area = "M"
 tier = "P1"
 milestone = "M12"
-status = "planned"
-commands = []
-tools = []
-evidence = []
-notes = ""
+status = "shipped"
+commands = ["file.properties"]
+tools = ["doc_initial_view"]
+evidence = ["crates/automation/tests/automation.rs::initial_view_through_tools", "crates/ui-egui/tests/viewer.rs::tab_and_window_show_the_document_title_when_asked"]
+notes = "Initial View ▸ Show: Document Title (/DisplayDocTitle); the tab and window then show the title"
 
 [[feature]]
 id = "a11y.make-accessible-action"