#372: uncompressed QuickTime (raw RGB / ARGB) output module format

Problem: the Render Queue had no single-file uncompressed output, so
handing a render to an external encoder meant a lossy codec, ProRes,
or an image sequence plus a separate WAV.

Fix: add the "QuickTime (Uncompressed)" Output Module format. Frames
are stored as QuickTime 'raw ' samples: 8-bit RGB (depth 24, rows
padded to even bytes) or ARGB with RGB + Alpha (depth 32), written
through FilmCraft's existing QuickTime muxer with PCM audio
(16/24-bit or float) like ProRes. Format name `uncompressed` on the
control channel; disk-space estimate and Sample Format menu included.

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

crates/engine/src/render_queue.rs

@@ -203,6 +203,11 @@ pub fn bytes_per_frame(om: &OutputModule, w: u32, h: u32, fps: f64) -> f64 {
             };
             mbps(rate) * px / 29.97
         }
+        // 24-bit RGB rows padded to even bytes, or 32-bit ARGB.
+        OutputFormat::Uncompressed => {
+            let bpp = if om.channels == effectcraft_project::render_queue::Channels::Rgba { 4 } else { 3 };
+            ((w as u64 * bpp).next_multiple_of(2) * h as u64) as f64
+        }
         OutputFormat::WebM => mbps(8.0) * px / fps,
         OutputFormat::Gif => w as f64 * h as f64 * 0.5,
         OutputFormat::Wav | OutputFormat::Aiff => om.audio_sample_rate as f64 * 4.0 / fps,