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/screens/game.js

@@ -94,8 +94,9 @@ import { pieceTile } from '../render/drag.js';
 import {
   phaseMode, phaseBanner, isCombatPhase, showDeadPill, isBossPhase, placementContext, canPlace, boardTargets, dropIntent,
   snapHud, activeBubbles, shortcutFor, shortcutBlocked, closesOnFieldPress, phaseTotalSeconds, homeFieldId, ownFieldId, normalizeSp, sortedPlayers,
+  terrainInfo,
   countdownState, shopBlockReason, stageOverrides, effectiveStage, watchTarget, dropFailureReason,
-  previewEnemyKey, prepCamera, prepCameraFor, foldCamera, deployFieldOf, panelSide, panelSlots, bondPopupPlace, unitLoadout, deployedRecord,
+  previewEnemyKey, prepCamera, prepCameraFor, foldCamera, deployFieldOf, fieldTile, panelSide, panelSlots, bondPopupPlace, unitLoadout, deployedRecord,
   mergeTarget, modeOffBonds, readyFundsPrompt, ownerBandId, ownDiyRecord, ownStandIn,
 } from '../ui/gameLogic.js';
 import { toast } from '../ui/toasts.js';
@@ -341,6 +342,16 @@ function MatchScreen() {
     const st = fieldStage || (ownView ? ownStage : baseStage);
     if (st) view.setStage(st);
   }, [view, ownView, ownStage, baseStage, fieldStage]);
+  // the stage behind the board ON SCREEN — the one view.setStage was just given: a field's own map (联防, GitHub #41),
+  // else the own one (机变 overrides applied) or, while watching a teammate, the plain one — and how a tapped BOARD tile
+  // maps to it (GitHub issue #184: tileClick → gameLogic.terrainInfo). Everywhere but a boss-prep board the two spaces
+  // are the same: a 最终攻势 / 隐秘核心 battle renders the stage's own rows (GEO.BOSS_RECT), 联防 / normal rects are
+  // stage rows; the boss PREP draws the player's half (stage rows 2–5) as board rows 9–12 (render/prepfield.js toDisp),
+  // which is exactly gameLogic.fieldTile.
+  live.current.terrainStage = fieldStage || (ownView ? ownStage : baseStage);
+  live.current.terrainTile = showPrep && (deployField === 'bossL' || deployField === 'bossR')
+    ? (row, col) => fieldTile(deployField, row, col)
+    : (row, col) => [row, col];
   const staleFieldRef = useRef(null);
   const enteredFieldRef = useRef(null);
   const pressSel = useRef(null);                         // the selected piece when the current field press began
@@ -860,6 +871,19 @@ function MatchScreen() {
         setSel(wasSel ? null : { uid: e.uid });
         if (wasSel) setDetail((d) => (d?.kind === 'piece' && d.uid === e.uid ? null : d));
       }),
+      // a tap on the ground itself: a special terrain tile explains itself (GitHub issue #184 「建议加入对于特殊地形的单击
+      // 信息提示」) — 活性源石 / 沼泽 / 排气格栅 / 深水区 / 红蓝门 / 传送, with the numbers of the stage behind the board.
+      // An ordinary tile (road / floor / wall) says nothing, so the press keeps its other meanings (deselect, close).
+      view.on('tileClick', (t) => {
+        if (!t || !Number.isInteger(t.row) || !Number.isInteger(t.col)) return;
+        const L = live.current;
+        const [row, col] = L.terrainTile(t.row, t.col);
+        const info = terrainInfo(L.terrainStage, row, col);
+        if (!info) return;
+        audio.sfx('click', { volume: 0.4 });
+        setSel(null);
+        setDetail({ kind: 'terrain', terrain: info });
+      }),
     ];
     return () => { moveOff?.(); for (const off of offs) { try { off?.(); } catch { /* ignore */ } } };
   }, [view]);

public/js/screens/title.js

@@ -20,6 +20,8 @@ import { data, useData } from '../data.js';
 import { FullscreenButton, detectFeatures } from '../ui/device.js';
 import { LangToggle, useLang } from '../ui/lang.js';
 import { t, N_ } from '../../../shared/i18n.js';
+import { GIcon } from '../ui/gameComponents.js';
+import { SettingsModal } from '../ui/settings.js';
 
 // Same character classes as server/net.js sanitizeName (control, zero-width, bidi, BOM), so a name
 // the client accepts is never rejected by the server's hello validation.
@@ -187,6 +189,7 @@ export function TitleScreen() {
   const pendingJoin = useStore((s) => s.ui.pendingJoin);
   const lang = useLang();
   const [name, setName] = useState(() => store.get().me.name || identity.loadName() || '');
+  const [settingsOpen, setSettingsOpen] = useState(false);
   const assetsSettled = useData('assets');
   const assets = data.get('assets');
   const backdrop = findUiAsset(assets, BACKDROP_KEYS);
@@ -265,11 +268,15 @@ export function TitleScreen() {
           <span>${STATUS_TEXT[conn.status] ? t(STATUS_TEXT[conn.status]) : conn.status}</span>
           ${conn.status === 'online' ? html`<${PingPill} ms=${conn.ping} />` : null}
           <${GuideButton} class="title-guide" label=${t('玩法说明')} />
+          <button type="button" class="title-settings fsbtn tapx" aria-label=${t('设置')} title=${t('设置')}
+            onClick=${() => setSettingsOpen(true)}><${GIcon} name="gear" /></button>
           <${FullscreenButton} class="title-fs" />
         </div>
       </div>
     </main>
 
+    <${SettingsModal} open=${settingsOpen} onClose=${() => setSettingsOpen(false)} />
+
     <footer class="title-foot">
       <span>${t('非官方同人复刻 · 游戏素材版权归 上海鹰角网络 / Yostar 所有')}</span>
       <${MicroLabel}>v${APP_VERSION} · WEB SIMULATION<//>