Nine BattleViewer refinements from the latest review pass:
1. Mass radii were uniform in synthetic mode because
`+layout.svelte` skipped `loadCore()` on the synthetic branch.
The wasm bridge to `pkg/calc/ship.go` now boots in both modes
so `computeBattleGroupMass` resolves a real FullMass and
`radiusForMass` produces a per-battle scale.
2. Phantom-destroy clamp in `buildFrames`. Legacy emitters
(KNNTS041 planet #7) log many more `Destroyed` lines against a
group than the group's initial population — at frame 406 of
2317 the race totals previously hit zero on phantom shots and
the scene blanked while playback continued silently. We now
only shrink the per-group remaining count and the race totals
when the group still has ships. The line still draws on
phantom frames; only the counters stay sane.
3. Vogel sunflower positions are now reassigned by inward dot
product before being handed to ranks: the rank-0 bucket — the
one with the largest initial ship count — always lands at the
most-inward spiral slot. The previous quarter-step anchor bias
was too weak; ranks r ≥ 2 routinely overtook rank-0 toward
the planet. The anchor offset is gone.
4. Bucket order inside a cluster is locked at battle start by
each bucket's *initial* ship count (`num`), not its live
`numLeft`. The position of every class circle stays put for
the whole battle; only the label number changes as ships die.
5. Shot line + defender flash blink on a per-frame timer during
play. The line stays on for the first 90 % of frame duration,
off for the last 10 %, so two consecutive shots from the same
attacker on the same defender look like two distinct pulses.
On pause the line and flash stay drawn for inspection.
6. The defender's class circle now flashes red (destroyed) or
green (shielded) in sync with the shot line, so the eye
catches *who* was hit, not just where the line lands.
7. Battle log rows are buttons. Click / Enter / Space pauses
playback and seeks to that shot. The list also auto-scrolls
the current row into view so the highlight does not race off
the bottom on long battles.
8. Race labels now sit above the cloud's bounding top instead of
a fixed offset, so a dense cluster does not swallow its own
race name.
9. Planet glyph + label switch to neutral grey
(`#2a2f40` / `#4a5066` / `#6d7388`), keeping the planet "in the
background" rather than competing with the combatants.
Step-back icon switched to `◀︎◀︎` to mirror step-forward.
Tests: two new Vitest cases cover the phantom-destroy clamp
(single-race wipe, mixed-class race survives a class wipe). The
existing 642 Vitest tests stay green; all four `battle-viewer`
Playwright cases pass.
Docs: `ui/docs/battle-viewer-ux.md` rewrites the cluster section
(locked order + Vogel reassignment), adds Playback Details (blink
+ flash semantics), and a Phantom Destroys section explaining the
clamp.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Ilia Denisov
17a3afd5e9