feat(formats,viewer): movie subtitles, voice decode, and the movie manifest

The movie cutscene subtitle + voice pipeline, driven by the ADVERTISE_MOVIE
manifest (the authoritative movie -> subtitle -> voice index). Also flushes
several sessions of local WIP (async viewer loading, grouped-pool XBG7/hero-ship
decode, drawlog tooling). See docs/HANDOFF-movie-voice-subtitles-2026-07-19.md.

Subtitles (movie_subtitle.rs):
- Full movie->track->text chain; join multi-line captions sharing one timing
  (fixes S13A dropped "Look at it father" line); overlap-safe active_cues();
  Latin-1 accents preserved.

Voice (slb.rs): XACT .slb -> XMA1 RIFF; take the FIRST sub-wave bounded by its
declared data size (fixes S10-S16 alternate-take garble); list_voice_clips.

Manifest (movie_manifest.rs): parse ADVERTISE_MOVIE (0x5B983A08) for the real
movie->voice binding (not always VOICE_<movie>; e.g. hokyu -> VOICE_D_* in etc\).
Resolve the token's sound.pak path via sounds.tbl. DIRECT bindings only — the
demo-id shared-clip fallback for unbound hokyu movies was verified WRONG in-game
and reverted (unbound hokyu stay unvoiced; correct join key is an OPEN problem).

Viewer: manifest-driven voice (movie player toggle + solo button), standalone
"Voice Lines" browser, stacked caption overlay.

Tests: 46 formats-lib + 11 viewer-lib + movie_manifest/movie_subtitle/slb disc
tests; full workspace green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/sylpheed-formats/src/lib.rs

@@ -50,10 +50,20 @@ pub mod mesh;
 // Audio parsing — scaffold for XMA handling
 pub mod audio;
 
+// Movie cutscene subtitles — the movie → track → text chain.
+pub mod movie_subtitle;
+
+// XACT `.slb` sound banks (voice / music) → decodable XMA1 RIFF.
+pub mod slb;
+
+// The movie manifest: authoritative movie → subtitle → voice index.
+pub mod movie_manifest;
+
 /// Re-export the most commonly used types at the crate root.
 pub use font::FontInfo;
 pub use idxd::{IdxdError, IdxdObject};
 pub use ixud::{Cue, Subtitle};
+pub use movie_subtitle::{SubCue, SubLang};
 pub use mesh::{GameMesh, Xbg7Model};
 pub use ratc::RatcChild;
 pub use t8ad::T8adImage;