corpse: each way a grave can draw no plate now says which one it was

He hovered a grave for the instrumentation and the log has **no** corpse line at
all — which, as the earlier note said, means the question is now a different
one: either no corpse object arrived, or the pick never landed on it, or the
plate refused it silently.

Two of those were still silent. The bone-pile refusal now logs too, though it is
the reference's own answer (`0x5d76d0`: bones with `CORPSE_FIELD_DYNAMIC_FLAGS`
bit 0 clear shows no name) — from the player's chair it looks identical to a
miss, and it is the likeliest shape for a grave. A picked corpse with no fields
logs as well.

`log_new_corpses` is the third leg: one line per corpse object the server sends,
with its flags, owner and chosen model, on `Added<ObjectStore>` so it touches
only the frame's new arrivals. It answers whether the grave he hovered was a
body or a bone pile without asking him to hover anything, and separates "nothing
arrived" from the two plate-side misses.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SgstFWtn1RxEJ5kVrpgYwn

crates/benilla-app/src/ui_tooltip/mod.rs

@@ -693,10 +693,24 @@ fn drive_mouseover_tooltip(
         .filter(|_| go.is_none())
     {
         let Some(store) = stores.get(entity).ok() else {
+            note_corpse_miss(
+                &mut memo.corpse_miss,
+                guid,
+                "the picked corpse carries no fields",
+            );
             return;
         };
         // A bone pile with nothing to take publishes no mouseover: no plate, no brighten.
         if !crate::target::corpse_mouseover_eligible(store) {
+            // Logged too, though it is the reference's own answer (`0x5d76d0`: bones, and
+            // `CORPSE_FIELD_DYNAMIC_FLAGS` bit 0 clear, so nothing to take). "No tooltip on a
+            // grave" looks identical to the two misses below from the player's chair, and this
+            // line is what tells them apart.
+            note_corpse_miss(
+                &mut memo.corpse_miss,
+                guid,
+                "a bone pile with no loot, which the reference refuses too (`0x5d76d0`)",
+            );
             if !matches!(*last, LastHover::None) {
                 script.world_tooltip_fade();
                 *last = LastHover::None;