feedback5: merge feedback4 (3af5b84) — PRs #186 / #134 / #185 / #24 / #183 ported to the split layout (terrainInfo / TERRAIN_TIPS into a new ui/gameLogic/terrain.js re-exported by the gameLogic.js barrel, closesOnFieldPress into ui/gameLogic/shortcuts.js, the rest in place; 42 strings through t(), #183's 设置 too); golden unchanged

Ported by hand:
- public/js/ui/gameLogic.js is a re-export shim on feedback5: #185's TERRAIN_TIPS / terrainInfo went into the new
  public/js/ui/gameLogic/terrain.js (the barrel gains one re-export line); closesOnFieldPress 'terrain' into
  ui/gameLogic/shortcuts.js.
- i18n (docs/I18N.md): every new user-visible string goes through t() with an English entry in public/i18n/en.json
  (42, after the 补位 strings): the terrain names / tags / fact table are N_() and translated where terrainInfo hands
  them out, the mechanism lines are msgids with their numbers as params (a line with an optional half is two whole
  msgids, the list joins use an array param), the card's 地形机制 / 这一格 titles in ui/detailPanel.js. Official EN
  terms where the EN client has them (stage_table tileInfo: Active Originium, Mire, Exhaust Grille, Deep Water Zone,
  Incursion Point, Protection Objective, Tunnel Entry / Exit, High Ground; Camouflage). The Chinese output is
  byte-identical to feedback4's terrainInfo on all 5187 tiles of the 13 stages and on synthetic stages.
- public/js/screens/game.js (MatchScreen still lives there): the import keeps feedback5's names plus terrainInfo /
  fieldTile; the terrain stage is the one view.setStage gets, so it includes feedback5's fieldStage — a 联防 field is
  played on its own map (GitHub #41), and a tap there explains that map's tile, not the round stage's. The tileClick
  handler and render/app.js emitTileClick / ui/fallbackField.js auto-merged in place. terrainInfo reads the stage only,
  so a 补位 / 自选 board explains its tiles the same way (their pieces only change a piece's art and name).
- public/js/ui/detailPanel.js: the terrain branch of resolveDetail before feedback5's stand-in / 自选 helpers.
- public/js/screens/title.js (#183): feedback5's LangToggle / t() imports plus GIcon / SettingsModal; the gear
  button's aria-label / title are t('设置') (en.json already has "Settings").
- tools/fetch-assets.mjs / tools/assets/downloader.mjs: --add-only (keepExisting, the font skip) beside #24's
  --asset-source / SP_ASSET_SOURCE and the shared MirrorPolicy; feedback5's extraOperators / moduleTypes and the
  voice plan unchanged.
- data/assets.json: feedback5's manifest plus #134's audio.sfx.battle.leak (after heal, the plan order); stats files
  6993 → 6994 and bytes +23 240 as measured on feedback4; the hash recomputed with the generator's contentHash
  (c01aa739a2d3 → 6a547fc5c937). A field-wise JSON diff against feedback5 shows only those four fields.
- docs: DESIGN §24 intro and §24.5 / §24.6 as on feedback4 (the rest of DESIGN.md is feedback5's); ASSETS.md,
  DEPLOY.md, PLAYING.md auto-merged.
- Auto-merged and checked: audio.js (the sim still emits ['leak', id], server/sim/battle/deploy.js), render/style.js,
  textures.js, tiles.js, board3d/materials.js, boardArt.js, tools/assets/*, tools/setup.mjs, extract.py, the tests.

Checks: the PRs' unit tests (audio 22, gameLogic 44, terrain-detail 1, originium-art 4, boardart 15,
board3d-extract 9, asset-network 21, fetch-assets-shrink 4), i18n 9 / i18n-data 8 / i18n-server 4, client-static 313,
docs-consistency 24, kits_layout 6 pass; lint 0 errors (no new warnings), check:imports, typecheck; golden: all 283
scenarios match, nothing regenerated.

public/js/ui/detailPanel.js

@@ -615,9 +615,30 @@ export function TokenDetail({ token, piece, ownerId = null, snapHp = null, live
     ${talents.length ? html`<${Section} title="天赋">${talents.map((t, i) => html`<p class="dtext" key=${i}><b>${t.name}</b> ${t.desc}</p>`)}<//>` : null}`;
 }
 
+/**
+ * A special terrain tile's tip (GitHub issue #184: 「建议加入对于特殊地形的单击信息提示」). Opened by a tap on the tile
+ * itself — the game screen resolves it with `gameLogic.terrainInfo` from the stage the board on screen is built from, so
+ * the mechanism lines carry that stage's own numbers (活性源石's damage / duration, 沼泽's stacks, 深水区's drowning …).
+ * @param {{ name:string, tag:string, lines:string[], facts:string[], row:number, col:number }} terrain
+ */
+function TerrainDetail({ terrain }) {
+  return html`
+    <div class="dhead">
+      <div class="dhead__icon"><${Icon} name="info" /></div>
+      <div class="dhead__info">
+        <div class="dhead__chips"><span class="dtag-kind">${terrain.tag}</span></div>
+        <h3 class="dhead__name">${terrain.name}</h3>
+      </div>
+    </div>
+    <${Section} title=${t('地形机制')} micro="TERRAIN">
+      ${terrain.lines.map((line, i) => html`<p class="dtext" key=${i}>${line}</p>`)}
+    <//>
+    ${Array.isArray(terrain.facts) && terrain.facts.length ? html`<${Section} title=${t('这一格')}><p class="dtext">${terrain.facts.join(' · ')}</p><//>` : null}`;
+}
+
 /**
  * Resolve what a detail target shows.
- * @param {{ kind:'piece'|'chess'|'item'|'enemy'|'unit'|'token', id?:string, uid?:number, unit?:any, count?:number }} target
+ * @param {{ kind:'piece'|'chess'|'item'|'enemy'|'unit'|'token'|'terrain', id?:string, uid?:number, unit?:any, count?:number }} target
  * @param {Map<number, any>} pieces indexPieces(priv)
  * @param {{ priv?: any, backups?: any }} [opts] 0.2.0 补位: the player's own pieces and cards of a chess in
  *   m.private.standIns — a unit carrying `standInFor`, and a teammate's bond popup row that says it (`target.standInFor`)
@@ -627,6 +648,8 @@ export function TokenDetail({ token, piece, ownerId = null, snapHp = null, live
  */
 export function resolveDetail(target, pieces, { priv = null, backups = data.get('backups') } = {}) {
   if (!target) return null;
+  // a special terrain tile (issue #184): the screen resolved the stage's own numbers already (gameLogic.terrainInfo)
+  if (target.kind === 'terrain') return target.terrain && typeof target.terrain === 'object' ? { type: 'terrain', terrain: target.terrain } : null;
   const ownSi = (c) => ownStandIn(c, priv, backups);
   const dd = { chess: data.get('chess'), backups };
   /** the own card of chess `c`: its 自选 record and pick when the player filled that DIY slot */
@@ -737,6 +760,7 @@ export function DetailPanel({ detail, editable, snapHp, onClose, onSell, onDestr
       ${detail.type === 'item' ? html`<${ItemDetail} item=${detail.item} piece=${detail.piece} editable=${editable} onDestroy=${destroyIt} offBonds=${offBonds} />` : null}
       ${detail.type === 'enemy' ? html`<${EnemyDetail} enemy=${detail.enemy} snapHp=${snapHp} count=${detail.count} live=${liveNow} />` : null}
       ${detail.type === 'token' ? html`<${TokenDetail} token=${detail.token} piece=${detail.piece} ownerId=${detail.ownerId ?? null} snapHp=${snapHp} live=${liveNow} />` : null}
+      ${detail.type === 'terrain' ? html`<${TerrainDetail} terrain=${detail.terrain} />` : null}
     </div>
   </aside>`;
 }