feedback4: every melee chess whose trait reads 可以放置于远程位 may stand on a 高台, normal or elite, any module

The owner's decision of 2026-10-05 reverses the one of 2026-10-04 (elite 歌蕾蒂娅 with HOK-Y only) and follows PRTS:
the line is the 钩索师 / 推击手 branch trait (歌蕾蒂娅, 崖心, 见行者, normal and elite) and every module keeps it, so
the loadout no longer matters. Raised with the PRTS source in PR #69 by @sunstricken (its own change covered only
歌蕾蒂娅; its test page is not taken). GitHub #153.

- shared/highGround.js: meleeOnHighGround(rec) reads the trait without a module (traitBase, else trait); no module id.
- board.js positionClass(rec) widens those six records; placeClass(ps, rec) = positionClass(rec) for every server
  check (g.move, swaps, merge tile, evictions, audit, invariants). The client's piecePosition mirrors it.
- bot.js: the existing 高台 preference (a 高台 whose range covers the road) now applies to all six; comments.
- Docs: DESIGN §3 and §6.6, DATA (placement), PLAYING §4, META, research 03 C2, code comments. data/ unchanged
  (build-data --offline gives identical files).
- Tests: board, feedback1-placement (each holder with default / no module / every module on each 高台, a 重装
  refused, client highlights, swap, battle, bots), gameLogic.

Golden: 16 scenarios moved, every one because tools/golden.mjs lays operators out by positionClass and now places
歌蕾蒂娅 (normal, or elite with HOK-X) beside the enemy path like a ranged operator instead of on the busiest melee
tile, which shifts the others: roster-010, roster-012, roster-029, roster-040, roster-041; bond-deputShip-high,
bond-indomShip-low, bond-preciShip-low, bond-preciShip-high, bond-suntShip-low, bond-swiftShip-high; boss-boss_2-pair,
boss-boss_4-pair, boss-boss_6-pair, hidden-boss_8-pair, hidden-boss_10-pair. roster-031 (elite with HOK-Y, already
widened) and all matches are unchanged.

tools/build-data.mjs

@@ -808,9 +808,9 @@ function buildChess(ctx) {
     rec.subProfessionName = uniequip.subProfDict?.[char.subProfessionId]?.subProfessionName || null;
     rec.position = char.position;
     rec.nationId = char.nationId || null;
-    // 高台 is not a data flag. The trait line 「可以放置于远程位」 is on every 钩索师 / 推击手 variant and is not
-    // trusted: only elite 歌蕾蒂娅 carrying HOK-Y may stand there, decided at place time (shared/highGround.js,
-    // owner's decision 2026-10-04, reversing DESIGN §22.6).
+    // 高台 is not a data flag: a MELEE chess whose trait (no module: `traitBase` / `trait`) reads 「可以放置于远程位」
+    // — the 钩索师 / 推击手 branch trait — may stand there, read at place time (shared/highGround.js; the owner's
+    // decision of 2026-10-05, following PRTS).
 
     // Module (only active on golden chess: equipLevel > 0).
     const modId = shop.defaultUniEquipId || null;
@@ -3143,7 +3143,7 @@ function validateAll(f) {
     // DESIGN §16 loadout choices
     if (!Array.isArray(c.skills) || c.skills.filter((s) => s.isDefault).length !== 1 || c.skills.find((s) => s.isDefault)?.skillId !== c.skill?.skillId) err(`chess ${c.chessId}: skills[] without exactly one default = skill`);
     if (c.modules && (c.modules.filter((m) => m.isDefault).length !== (c.module?.active ? 1 : 0) || !c.statsBase || !c.traitBase || !c.talentsBase)) err(`chess ${c.chessId}: inconsistent module choices`);
-    // 高台 legality is loadout-aware (shared/highGround.js), never a field on the record
+    // 高台 legality is read from the trait text at place time (shared/highGround.js), never a field on the record
     if (c.placement !== undefined) err(`chess ${c.chessId}: placement is not a data field`);
   }
   // the deliberate trigger deviations (DESIGN §21.29, §22.10) still override an official TAKE_DAMAGE row, on the normal