feedback4: merge master — PR #186 (board textures as WebP), PR #134 (the leak alarm), PR #185 (terrain tap-to-explain, one 活性源石 material); DESIGN §24 intro lists §24.5 / §24.6 after the 0.1.4 sections; golden unchanged (client and tools only)

docs/ASSETS.md

@@ -129,7 +129,7 @@ The `stem` of a Spine model is the upstream file name. Two examples: `char_107_l
 - **Fonts:** OTF/TTF files are converted to WOFF2 by a built-in encoder (`tools/assets/woff2.mjs`: Brotli with null transforms).
   - Its output was verified lossless against Google's reference `woff2` decoder.
   - `fonts.css` lists WOFF2 first and falls back to the original file.
-- Images stay PNG. WebP conversion is not done: it would need a native dependency.
+- Images stay PNG. WebP conversion is not done: it would need a native dependency. The local-client board textures are the exception: `tools/local-extract/extract.py` (Python, where Pillow is already a dependency) writes WebP copies of the 12 textures the 3D board downloads (`WEBP`: colour maps lossy at quality 95 with the alpha and the RGB under transparent texels kept, normal and data maps lossless) and `data/local-assets.json` lists the copies; the PNGs stay beside them for `tools/crop-board-atlas.mjs`. `extract.py --webp` adds the copies to an existing extraction without the client.
 
 ## Manifest schema (`data/assets.json`)
 
@@ -182,7 +182,7 @@ All paths are URL paths relative to the site root, for example `/assets/char/ava
                 defenceStart, defenceUnite, battleOverReduce, battleOverNoReduce, battleOverNormal, goFirst,
                 disconnect, settlementSucceed, settlementFail, settlementTeam, settlementBossSign,
                 goodEvaluation, load, start, matchSucceed, matchFail, matchCancel, joinRoom },
-      battle: { deploy, tokenDeploy, charDie, enemyDie, enemyDieHeavy, enemyHit, heal, win, lose, killCoin },
+      battle: { deploy, tokenDeploy, charDie, enemyDie, enemyDieHeavy, enemyHit, heal, leak, win, lose, killCoin },
       units:  { [charId|tokenId|enemyId]: { attack?, hit?, skill?, skills?: {[skillIndex]: url}, die?, born?,
                 mix?: { [attack|hit|die|born]: { p?, vol? } } } }
     }

docs/DEPLOY.md

@@ -257,3 +257,5 @@ services:
 表情（6 套 × 6 个）和「玩法说明」的 19 页教程图公开镜像也有：`node tools/setup.mjs` 会和其他素材一起下载（约 21 MB），不需要客户端；有本地素材时优先显示本地的。
 
 **没有客户端的服务器**想要上表中的官方素材：从**同一版本**的完整包（[Releases](https://github.com/sganggs/Stronghold-Protocol/releases)）里，把 `public/assets/local/` 文件夹和 `data/local-assets.json` 复制到服务器项目目录下的相同位置。服务器每次请求都会重新读取这两处，不必重启，玩家刷新页面即可。一定要用与服务器代码相同版本的完整包：各版本提取的内容和清单可能不同（例如灼热 / 炽焰源石虫的模型是 0.1.0 之后才加入的），混用其他版本的文件会缺图或用错图。复制后 `node tools/doctor.mjs` 会显示本地素材的条目数和「3D 棋盘可用」。
+
+**3D 棋盘贴图的下载量**：每位玩家进入对局时都要从开服的电脑下载 3D 棋盘的 12 张贴图。提取时会给这 12 张各写一份 WebP（颜色贴图有损、质量 95，法线和数据贴图无损），清单里列的是 WebP，同名 PNG 留在旁边给裁切工具和 setup 用。这部分下载量从约 6.7 MB 降到约 2 MB，网速慢的远程联机最明显。只有 PNG 的本地素材（例如在这一改动之前提取的）可以用提取时的 Python 环境运行 `tools/local-extract/extract.py --webp` 就地补上，只需要 Pillow，不需要客户端。

docs/DESIGN.md

@@ -2142,7 +2142,7 @@ Decisions of the owner, 2026-10-04: a 联防 devour counts members who enter alr
 
 ## 24. Community reports after 0.1.3
 
-Reports after the 0.1.3 release. Each was checked against the official data and PRTS; anything with no source is marked [ASSUMED]. Where each is handled: a skill clip with no Begin and no own Idle plays once (德克萨斯 S2 剑雨) → §24.1; 高台 for every melee chess whose trait reads 「可以放置于远程位」 (GitHub #153, PR #69) → §24.2; the 5-阿戈尔 revives go to the first 3 members knocked out (GitHub #105, #140) → §24.3; 联防 阿戈尔 devours the operator in front whoever owns it (GitHub #140) → §24.4. Merged pull requests keep their own notes where they changed the rules: deploy-timed skills as duration skills (PR #109, §5 skill contract), the teammate's hand / temp / equipment in prep scouting (PR #129), 灵巧's knocked-out aura and the hidden-layer bonds (PR #66, research 02).
+Reports after the 0.1.3 release. Each was checked against the official data and PRTS; anything with no source is marked [ASSUMED]. Where each is handled: a skill clip with no Begin and no own Idle plays once (德克萨斯 S2 剑雨) → §24.1; 高台 for every melee chess whose trait reads 「可以放置于远程位」 (GitHub #153, PR #69) → §24.2; the 5-阿戈尔 revives go to the first 3 members knocked out (GitHub #105, #140) → §24.3; 联防 阿戈尔 devours the operator in front whoever owns it (GitHub #140) → §24.4; a special terrain tile explains itself on a tap (GitHub #184, PR #185) → §24.5; 活性源石 was two different materials on the two boards (GitHub #184, PR #185) → §24.6. Merged pull requests keep their own notes where they changed the rules: deploy-timed skills as duration skills (PR #109, §5 skill contract), the teammate's hand / temp / equipment in prep scouting (PR #129), 灵巧's knocked-out aura and the hidden-layer bonds (PR #66, research 02).
 
 ### 24.1 A skill clip with no Begin and no own Idle plays once — 德克萨斯 S2 剑雨 (player report) — `render/spine.js SpineActor.setSkill / update` (`SKILL_CLIP_MIN`, `skillClipOnce`, `skillEndPending`)
 
@@ -2312,3 +2312,23 @@ Reports after the 0.1.3 release. Each was checked against the official data and
   through a teammate's 幽灵鲨 equals the own chain, and her knock-out takes her owner's 5-tier slot; the own-board case
   through `uniteBattleOpts` (carry.down from a real own combat, the own combat's gains). The first three fail on the
   previous code. `feedback3-egir-down`, `bonds_core`, `unitedown`, `feedback3-unitecarry` pass unchanged.
+
+### 24.5 A special terrain tile explains itself on a tap (GitHub #184, player request 「建议加入对于特殊地形的单击信息提示」) — `render/app.js` (`tileClick`, `emitTileClick`), `ui/fallbackField.js` (the board tile), `ui/screens/game.js` (`tileClick` → `terrainInfo`, `live.terrainStage` / `terrainTile`), `ui/gameLogic.js` (`terrainInfo`, `TERRAIN_TIPS`), `ui/detailPanel.js` (`TerrainDetail`, `resolveDetail`)
+
+- **Asked** (GitHub #184, after 0.1.3): a tap on a special terrain tile should say what it is. The mode draws 活性源石, 沼泽, 排气格栅, 深水区, the gates and the teleports, but nothing in the client names them — the legend lived in `docs/DATA.md` and the data only.
+- **Why the ground was free**: a press on a tile that had nothing on it only closed what was open (a piece / unit card, the selection). `render/app.js` now emits `tileClick { row, col }` when neither a battle unit, a prep piece (the drag controller), a pen enemy nor the boss leader took the press, and `ui/fallbackField.js` emits the same from its own tile divs, so both field implementations behave alike.
+- **What the card says**: `gameLogic.terrainInfo(stage, row, col)` reads the glyph from `stage.rows`, its legend entry from `stage.tiles` (tileKey / height / buildable / passability) and **that stage's own terrain parameters** from `stage.special[<terrain>]` — the values `sim/content/devices.js` runs on: 活性源石 `damage 70 / atk 0.2 / attack_speed 20 / duration 300` (PRTS 特殊地形 "部署于其上的我军和经过的敌军在{duration}s内每秒受到{damage}真实伤害…"), 沼泽's stack rule (`intervalSec` 1, `aspdPerStack` −0.05, `moveMulPerStack` −0.05, `maxStacks` 10, `heavyWeight` 3, cleared on leaving — PRTS 沼泽控制), 深水区's drowning (`damage 40`, aspd −0.6, move ×0.6) plus 拒绝部署 (PRTS 深水区 地形信息; `grid.js DEPLOY_REFUSED_TILES`), 排气格栅's "operators on it cannot be targeted by enemy ranged attacks" — completed in review with the two halves that matter in play: the operator it blocks still gets attacked (the tile's buff is a 隐匿-like `stealth` flag, `devices.js enterTerrain`), and 深水区's drowning damage is sourceless damage that no 干员's 增伤 / 穿透 / 装备 applies to and is *not* 环境伤害 (`tickDeepsea`'s tags are `dot` / `periodic` / `deepsea`, deliberately not `terrain`). The gates and teleports carry no `special`, so they key on `tileKey` — 红门 (enemy gate) / 蓝门 (protection objective) / 传送入口 / 传送出口, in the words `docs/PLAYING.md` already uses. The card is a normal `ResultDialog`-less `DetailPanel` card: read-only, no protocol frame, closed by the next field press (`closesOnFieldPress` now lists `terrain`) or its own ✕.
+- **An ordinary tile still says nothing** (road / floor / wall / fence / bench → null): the press keeps its other meanings there — deselecting a piece, closing a card — and a drag still starts only on a piece.
+- **Coordinate spaces (corrected in review)**: a tap reports BOARD coordinates — `emitTileClick` picks with `pickBoardTile`, so the boss-prep transform (`prepXf.toBoard`) is applied once, in the renderer. (The first version reported the DRAWN tile from `groundTile` and the screen mapped it again, so on a Final Assault / Hidden Core prep the tap was converted twice and explained another tile.) Everywhere but that 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`), the normal and 联防 rects are stage rows. A boss PREP draws the player's half — stage rows 2–5 — as board rows 9–12, and the screen turns the board tile into the stage tile with `gameLogic.fieldTile` before the lookup (and reads the stage the board on screen is built from: the own one with the player's 机变 tile overrides, `effectiveStage`, or the plain stage while watching a teammate).
+- **[ASSUMED]**: that a player wants the official's 地形信息 here (the official shows terrain descriptions in its own level / terrain UI, not in-match — research 09 records none) and the wording of the mechanism lines: the numbers are the data's, the prose is ours (marked as ours in `TERRAIN_TIPS`). A 机变 card that switches a terrain off (模拟战场演变 · 沙尘暴停止) is not reflected — the tip explains the TILE, not the round's modifier.
+- **Tests**: `test/ui/gameLogic.test.js` (every terrain of the real stages with its own numbers: 活性源石 in 战场#04, 沼泽 in 战场#06, 排气格栅 in 战场#07, 深水区 in 战场#05; the four gate / teleport tiles; an ordinary glyph → null; out-of-range, fractional and legend-less input; the fact lines from the legend entry; a stage missing its parameters still explains the mechanism), `test/ui/terrain-detail.test.js` (the tap's target resolves into the card; a tip-less or malformed one does not), `test/ui/terrain-tip.e2e.test.js` (headless Chrome on the mock harness: a tap on 蓝门 / 红门 opens the card with its own line on BOTH field implementations — the engine canvas at the tile's own screen position and the DOM fallback's tile — while a tap on a floor tile opens nothing; and on a Final Assault PREP the tapped tile is the one the board tile maps to on the boss field, the regression the review asked for).
+
+### 24.6 活性源石 is ONE material on both boards (GitHub #184, same report's second half) — `render/style.js` (`ORIGINIUM`, `linearToSrgb255` / `linearToHex`), `render/textures.js` (`originiumCanvas` / `originiumOverlay`, `MAT_DRAW.infection` / `infection2`, `PROC_LAYERS.originium` / `originium2`, `DEFAULT_ART_LAYERS.infection` / `infection2`), `render/tiles.js` (`variantMat`, the pulse tint), `render/board3d/materials.js` (`infectionMaterial`)
+
+- **Reported** (GitHub #184): 「感觉源石地板的图片有点奇怪（有点简陋，另外两个源石地板的贴图不一致）」 — two originium floors that do not match. They were two different materials: with the board art installed (or `?board=2d`) the tile came from the 2D atlas cell — a beveled brick with seven randomly placed orange crystal clusters — while the 3D board drew a world-space crust with pulsing veins over the official concrete. And that 3D crust was multiplied by a per-tile fade (`edge = smoothstep(0, 0.1, min(vUv, 1 − vUv))`), so every tile of a 活性源石 area faded out at its own border and the area read as separate patches rather than one floor.
+- **One palette**: `style.js ORIGINIUM` holds the crust's dark and lit sides, the vein and the crystal grains. The values are the 3D shader's own working colours (its fragment ends in `#include <colorspace_fragment>`, so they are linear); the canvas converts them with `linearToSrgb255` — without that the 2D tile came out darker than the 3D one, which is what the first version of this change did.
+- **One recipe**: two octaves of noise make the crust mask (`smoothstep(0.38, 0.62, n·0.7 + n2·0.45)`), the ridge of the fine octave its veins (`smoothstep(0.86, 0.98, 1 − |2·n2 − 1|)`, brightened where the crust is), the rare top of a third octave the grains — the shader runs it over world-space noise, `textures.js originiumCanvas` over a *toroidal* field (the noise wraps, so a cell that is repeated over the board lines up with itself: the veins run through the tile's edge instead of stopping at it).
+- **Both reach the tile's edges**: the 3D material no longer has the per-tile fade, and the 2D cell has no frame any more (the old `bevelTile` is gone). The mire / water / smog materials keep their own fades — this section is about 活性源石, the tile that was reported.
+- **With the board art installed** the 2D tile is composed exactly like the 3D one: `DEFAULT_ART_LAYERS.infection` draws the official concrete slab (`board3d/atlas.js concrete`, the same atlas rect) and then the crust as a procedural layer; without the art the cell falls back to `MAT_DRAW.infection` (the procedural ground + the same crust). A second variant (`infection2`, the same art mirrored; `PROC_LAYERS.originium2` for the art path) is picked by tile (`tiles.js variantMat`), so a field of 活性源石 does not repeat one pattern.
+- **Not [ASSUMED]** — this is our own art: the palette and the recipe are ours, the tile it dresses and its numbers are the data's (a 机变 card can switch the terrain off, §24.5).
+- **Tests**: `test/render/originium-art.test.js` (the couplings: both renderers take the palette from `ORIGINIUM`, the canvas converts it, the recipe's thresholds agree, the 2D base slab is the same atlas rect the 3D board lays its crust on, the infection shader has no per-tile fade while the mire keeps its own, two variants are registered and picked, the pulse tint is the shared one), `test/render/originium-cell.e2e.test.js` (headless Chrome: the cell's veins hit the palette's displayed colour (`linearToHex(ORIGINIUM.vein)`), veins reach the border like the middle (no frame), the veins at opposite edges are alike (the cell joins itself), and the second variant is a different pattern).

docs/PLAYING.md

@@ -18,6 +18,7 @@
 | 选择策略 | 40 名策略（分队长）决定**初始目标生命值（20–45）**和一条永久规则。同盟：随机顺序轮流选，**每人 30 秒**，右上角和「决策中」显示同一个倒计时；AI 队友立即选完；队友已选的不能重复，每人可**跳过一次**（排到最后）；超时自动选你**当前选中**的策略（已被队友选走则选华法琳）。独立：自由选择、不限时；同盟模拟只有你一名玩家时也不限时。选的时候可以点左侧决策顺序下方的「查看禁用盟约与干员」，再看一遍「确认本局信息」里的盟约（置灰、禁用人数）和本局禁用干员：只能查看，倒计时照常走，底部也显示轮到谁和剩余秒数；点「关闭」、点窗口外面或按 Esc 关闭，轮到下一位时会自动关闭。 |
 | 机变 | 部分回合开始前出现：同盟共 6 张卡轮流各取 1 张（首位 30 秒，其余 16 秒；只有你一名玩家时不限时），独立 3 选 1。卡片包括装备、资金、干员、盟约层数、悬赏等；**悬赏决策**为你的作战添加悬赏敌人，卡上用蓝字标出持续多久：「下场作战」/「接下来两场作战」的只出现一场或两场，之后不再出现；官方的「多轮悬赏」（原文写「之后的每场作战」）在这里也按「接下来两场作战」处理，只出现两场（如教鞭的法术大师A2·多轮战术特训）。各回合的悬赏决策按官方对局截图来出：第 3 回合是 6 张「接下来两场作战」的悬赏（3 张 1 资金、2 张 2 资金、1 张 3 资金）；第 9 回合是各首领的「下场作战」悬赏和「源石虫·特训」；绝境 / 终极的第 11 回合多半是悬赏决策（也可能是机密商店或战术决策），其中的悬赏通常有 1 只特异巨兽，其余是各阵营的「下场战斗」悬赏。击倒悬赏敌人的人（联防中的队友也算）获得资金；右侧效果栏会写「还剩 N 场作战」。**机密商店**的 6 件装备都免费，和官方一样可能出现两件相同的装备（各算一张卡，可以分别被选走）；第 11 回合（绝境 / 终极）的机密商店按官方：2 件 VI 阶、至少 1 件 V 阶和 1 枚盟约之币，标准 / 险境较早回合的机密商店各阶装备都可能出现。**战术决策**也和官方一样可能出现两张相同的卡（官方截图里出现过两张「补给」；各算一张卡，可以分别被选走，每张只生效一次，两人各选一张全队卡则效果叠加）；第 11 回合（绝境 / 终极）的战术决策按官方截图只出盟誓、驰援、列装 / 财富 / 补给 / 整备 / 升华等增益卡，不出削弱敌人的卡和战场演变卡。每张卡左上是图标和名称，下面写着完整效果（与详情卡相同的官方描述，手机上也显示）；已被选走的卡变暗，右上角显示选走它的玩家头像（悬停可看名字）。选卡要**点两次**：第一次只选中（金框 +「确认选择 · 再次点击」），再点同一张或点右上的「确认选择」才生效；点别的卡换选，按 Esc 或点空白处取消。 |
 | 休整期 | 购买、摆阵、配装备、冻结 / 刷新、升级调度中心；同盟有倒计时（65–215 秒，随回合增加）；独立模拟、以及只有你一名玩家（只带 AI 队友）的同盟模拟不限时。所有人「准备就绪」即提前开战，全员就绪前可取消。 |
+- **特殊地形点一下就有说明**：战场上的**活性源石**、**沼泽**、**排气格栅**、**深水区**，以及**红门 / 蓝门 / 传送点**，点一下就会弹出它自己的说明卡——名称、机制，以及**这一关自己的数值**（比如战场#04 的活性源石：每秒 70 点真实伤害、攻击力 +20%、攻击速度 +20、持续 300 秒）。休整期和作战期都能点。普通地板 / 道路 / 高台点了不会弹东西，所以点一下仍然只是「取消选中、关掉卡片」。
 | 作战 | 每人在自己的战场各自作战（战斗在你的浏览器里模拟，2 倍速）。干员按**逐列从左到右、每列从上到下**的顺序（官方「从上到下>从左到右」：最左一列最先）自动部署并消耗部署费用（初始 10，+1/秒）。时限 45–115 秒（实际秒数，即屏幕上的倒计时），时间到仍存活的敌人算漏怪。有敌人进入蓝门时，顶栏的目标生命值会**立即**显示扣除后的数值（红字 + 「−N」，每回合至多 10 点），结算时确定；联防阶段标注「联防中」，队友拦下的部分最后不扣。左侧队伍栏同样显示队友的待扣生命值。被击倒的干员**留在倒下的格子上**（倒地姿势、略微变灰），之后也在这一格再部署（与官方一样；倒在其他干员或召唤物初始位置上的，会回到自己的初始位置躺下，召唤物已经消失也一样）；因自身效果强制退场的干员（史尔特尔「余烬」结束、耀骑士临光 2 技能结束等）同样倒在原地、在原地再部署；倒地干员所在的格子**不会被占用**，突袭盟约的再部署、援军、召唤物都会避开它。头上的圆圈是再部署倒计时：绿色圆环 + 秒数；变成黄色「DP」表示部署费用不够。血条下方的一行是**元素损伤**（与原版一致：元素图标 + 白条）：干员为带图标的彩色圆盘，敌人为小号纯色圆盘，右侧白条是剩余元素值，像血条一样从右往左减少，白条耗尽的那一下就是爆条（被大额元素损伤一次打掉一截时白条也会一次少一截，例如掠海漂移体每击约为 25%–50%）；爆条后进入爆发冷却（灼燃 / 神经 / 侵蚀 10 秒，敌方侵蚀 8 秒，凋亡 15 秒），这时白条变成**元素颜色**（神经青绿、侵蚀蓝、灼燃橙红、凋亡灰紫）并在冷却期间慢慢回满、图标闪烁——彩色条表示已经爆条、正在承受爆发效果，不是还剩的元素值；期间所有元素都不会累积也无法被治疗，结束后清零。元素爆发造成的是**无来源伤害**，不吃干员的增伤、穿透和装备加成（例如深巡打海嗣时灼燃爆发固定 7000），击杀仍记在爆条的干员名下；元素脆弱只提高元素伤害，不加快元素条；脆弱不影响元素伤害。已被击杀的敌人不会再被附加元素损伤。 |
 | 联防 | 见第 5 节。 |
 | 结算 | 扣 LP、发放悬赏资金、结算层数；LP ≤ 0 的玩家淘汰（其干员回到公共卡池）。 |
@@ -88,6 +89,7 @@
 - 联防中击杀悬赏敌人，资金归击杀者。
 - 联防后仍然存活的敌人，按原主人扣 LP；没人完美作战时直接扣。
 - 漏怪的玩家在顶栏中间（击倒数旁）看到橙色的「×N」标签：你漏过、仍在联防战场上的敌人数（含还没出场的，**不设上限**），队友每击倒一个就减一（会分裂或召唤的敌人被击倒时，分裂出的敌人也算你的，数字会相应增加）；目标生命值同时显示为扣除 min(N, 10) 后的数值。左侧队伍栏里漏怪队友的行也显示 ×N（与战场上的击倒同步更新；鼠标悬停可看到是谁漏过的敌人）。
+- **有敌人走进蓝门就会响一声**：不等它真的扣到目标生命值——一回合里超过 10 点上限的那部分、数据里标明不计数目的敌人（BOSS 部件之类），以及联防里漏过去、随后被队友清掉的那几只，目标生命值都不会再扣，但这一声照样会响。播的是**原版关卡里怪进蓝门那一声**（官方音效表里的 `ON_ENEMY_REACHED_EXIT`，任何一关都是它）。你正在看哪个战场就听哪个战场的，所以看队友的战场、以及漏怪后观看联防时同样听得到。这一声 1.44 秒，我们按官方的「同时只允许一个」做成 **1.5 秒内共用一声**：一波打穿防线只响一遍（不会叠成一片），过一会儿再漏会再响。
 - 每个普通回合每人**最多扣 10 点 LP**。
 
 ## 6. 盟约