docs: fix Lovelace frame description, Amanda Seyfried's box is a ghost

Her bbox is frozen at identical coordinates for t=2450 and t=2451; the
dump's own per-frame detections show only one real face at t=2451, and
it matches the Chloë Sevigny box (IoU 1.0), not hers. The frame is one
ghost overlapping one fresh misidentification, not two competing fresh
identities as previously written.

docs/lvface-deep-dive.md

@@ -216,10 +216,16 @@ the edge of frame. A marginal, low-confidence lookalike confusion.
 
 ![Chloë Sevigny, out-of-cast name in Lovelace](assets/images/lovelace_fpi_sevigny.jpg)
 
-Chloë Sevigny, t=2451s, 100% confidence. Two boxes are drawn on the same
-face: one correctly labeled Amanda Seyfried, one incorrectly labeled Chloë
-Sevigny, both at 100%. A single detection producing two competing high-
-confidence identities on the same crop.
+Chloë Sevigny, t=2451s, 100% confidence. Amanda Seyfried's track is real and
+well-tracked through most of this shot, but her bbox is frozen at the exact
+same coordinates for t=2450 and t=2451, one second where her box stopped
+updating from a fresh detection. Only one real face is detected at t=2451
+(confirmed against the dump's own per-frame detections), and it is a tight
+IoU-1.0 fit under the Chloë Sevigny box, not the Seyfried one. So the green
+Seyfried box in this frame is a ghost, re-emitting her last known position
+for that one second, and the fresh, wrong detection is Sevigny, landing on
+top of it. Not two competing fresh identities on one crop: one ghost and
+one fresh misidentification happening to overlap.
 
 ### Scarface: 1 name