Merge main into feat/flac-export

No conflicts. main's new Chinese catalog requires every tl! string:
added zh-CN for the FLAC labels (format, preset, Audio Format entry,
Compression Level and its hint).

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

xtask/src/main.rs

@@ -61,6 +61,8 @@ const LAYERS: &[(&str, u8)] = &[
     ("audio", 2),
     ("captions", 2),
     ("speech", 2),
+    ("tts", 2),
+    ("tts-text", 2),
     ("interchange", 2),
     ("render", 3),
     ("gpu", 3),
@@ -94,6 +96,7 @@ const SAME_LAYER: &[(&str, &str)] = &[
     ("scopes", "gpu"),
     ("gpu", "render"),
     ("cli", "filmcraft"),
+    ("tts", "tts-text"),
 ];
 
 /// Crates that must not appear below L5 (UI toolkits, windowing, OS audio/menus).