Playtest #4 fixes: tile picking, knocked-down state, element gauges, draft timer, live stats, shop items, drones, 赫默, 炎佑, UI flash

- #1 picking by the tile under the pointer (prep, battle, pen, equipment drops); the dragged model stays
  under the pointer (mouse and touch); pixel probe removed; phone ghost-click on the underframe fixed
- #2 two-tap confirm on 机变 cards (like the shop)
- #3 a 同盟 room with one human is untimed like 独立模拟 (no countdown outside battles)
- #4 strategy draft: one synced countdown, 30 s per human turn, timeout takes the highlighted band
- #5 special 维式重锤 (4) and 突变细胞 no longer sold; item card shows where they come from
- #6 operator skill-mode sounds no longer play on normal attacks (纯烬艾雅法拉 and 55 others)
- #7 detail card shows live battle stats and the prep-time battle-start stats (g.unitStats)
- #8 official element gauges on units; burst cooldown (阻回) per PRTS
- #9 knocked-down operators stay on their tile with a redeploy countdown ring
- #10 drone behaviour per PRTS (暴鸰, 先兆者 shells, 黑云, 萨科塔之眼)
- #11 赫默's drone only from her skill; placeable summons limited to talent tokens
- #12 炎佑 stays where it is with no enemies; 祛恶之焰 as a continuous channel
- #13 the occasional giant bond icon (loading texture scaled ×46) fixed
- docs (DESIGN §18), recordings, data and tests updated (2467 unit tests, all browser suites green)

test/ui/loadout-battle.e2e.test.js

@@ -102,7 +102,10 @@ describe('user playtest #2 item 1 — loadout chosen in the UI fights in the loc
           tag: !!document.querySelector('.dpanel .dskill__name .dtag-loadout'),
           module: document.querySelector('.dpanel .dmodule')?.textContent || '',
           none: !!document.querySelector('.dpanel .dmodule.is-none'),
-          stats: Object.fromEntries([...document.querySelectorAll('.dpanel .dstat')].map((el) => [el.querySelector('.dstat__k')?.textContent, el.querySelector('.dstat__v')?.textContent])),
+          // the record (base) value: with live stats (user playtest #4 item 7: the start-of-battle preview) it is the
+          // cell's title "基础 N", else the value itself
+          stats: Object.fromEntries([...document.querySelectorAll('.dpanel .dstat')].map((el) => [el.querySelector('.dstat__k')?.textContent,
+            (el.getAttribute('title') || '').replace(/^基础 /, '') || el.querySelector('.dstat__v')?.textContent])),
           trait: document.querySelector('.dpanel .dtrait')?.textContent || '',
         })), () => null);
         if (detail) break;