fix(web): 文件预览修滚动穿透 + 图片 Ctrl+滚轮缩放 + bump 0.12.10

- 滚动不穿透:主/小预览 .body 加 overscroll-behavior: contain,再挂一次性
  非 passive wheel 监听,容器不可滚或到边界时 preventDefault 断冒泡,背景
  对话列表不再被带滚。
- 图片缩放(仅图片):Ctrl+滚轮 ×1.1 步进(夹 0.1-8x),用 CSS zoom 而非
  transform(zoom 改布局盒,放大后 body 才出滚动条能看溢出);右下角 xx%
  比例徽标(挂 .card,滚动不跟走,1s 淡出);双击复位 100%;.body.center
  改 safe center 防 flex 居中裁掉溢出顶/左。
- wheel 监听只 init 挂一次到复用 body,缩放目标走 _zoomState WeakMap,免
  每次预览重复 addEventListener 泄漏。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

PROGRESS.md

@@ -2,7 +2,7 @@
 
 > 配合 `DESIGN.md`。本文件只记 phase 状态、决策偏差、文件量、下一步。每条 1-2 句:做了啥 + 关键判断;细节查 `git log` / `git diff` / `DESIGN §7.9`。
 
-最后更新:2026-06-15(sandbox 装 emoji 字体修 mermaid 豆腐块)
+最后更新:2026-06-15(文件预览修滚动穿透 + 图片 Ctrl+滚轮缩放)
 
 ---
 
@@ -21,6 +21,15 @@
 
 ## 已完成关键能力
 
+### 2026-06-15 / 文件预览:修滚动穿透 + 图片 Ctrl+滚轮缩放
+
+- 现象:web 端文件预览弹框内滚滚轮,事件冒泡到背景把对话列表也滚了(scroll chaining);且图片预览无缩放手段。
+- 修法(纯前端,`web/static/js/preview.js` + `web/static/dev.html`):
+  - **滚动不穿透**:主/小预览 `.body` 加 `overscroll-behavior: contain`,再挂一次性非 passive `wheel` 监听 ── 容器不可滚(如图片正好铺满)或已到顶/底时 `preventDefault()` 断掉冒泡。
+  - **图片缩放**:仅图片(文本/md/docx/pdf 各有原生流/阅读器)。Ctrl+滚轮按 ×1.1 步进缩放(夹 0.1–8×),用 **CSS `zoom`** 而非 transform(zoom 改布局盒尺寸,放大后 body 才出滚动条能看溢出);右下角浮 `xx%` 比例徽标(挂 `.card` 上,滚动不跟走,1s 后淡出);双击复位 100%。`.body.center` 改 `safe center` 防 flex 居中把溢出顶/左裁掉够不到。
+  - wheel 监听只在 init 挂一次到复用的 body 元素,缩放目标走 `_zoomState` WeakMap,避免每次预览重复 addEventListener 泄漏。
+- bump 0.12.9 → 0.12.10。
+
 ### 2026-06-15 / sandbox 装 emoji 字体:修 mermaid 图满图豆腐块
 
 - 现象:模型生成的 mermaid 架构图里几乎每个节点标签前缀的 emoji 图标(🌐🔥🛡 等)全渲染成空心方框 □。根因不在 mermaid 语法 / 布局 ── `deploy/sandbox/Dockerfile` 只装了 `fonts-noto-cjk` + `fonts-wqy-microhei`(中文不豆腐),**缺 emoji 字体**,chromium 渲染时找不到 emoji glyph 就用 tofu 占位。

core/__init__.py

@@ -1,3 +1,3 @@
 # zcbot 版本号单一事实源:web/app.py 的 FastAPI version、/healthz 返回、前端展示都引这里。
 # 改版本只动这一行。
-__version__ = "0.12.9"
+__version__ = "0.12.10"

web/static/dev.html

@@ -814,7 +814,7 @@
   #file-preview-modal .card {
     width: 90vw; height: 90vh; max-width: 1200px;
     max-height: calc(100vh - var(--preview-bottom-inset, 0px) - 32px);
-    display: flex; flex-direction: column;
+    display: flex; flex-direction: column; position: relative;
     box-shadow: 0 12px 32px rgba(0,0,0,.22);
   }
   #file-preview-modal .hdr {
@@ -825,8 +825,17 @@
     flex: 1; font-weight: 500; overflow: hidden;
     text-overflow: ellipsis; white-space: nowrap;
   }
-  #file-preview-modal .body { flex: 1; overflow: auto; padding: 12px; position: relative; }
+  #file-preview-modal .body { flex: 1; overflow: auto; padding: 12px; position: relative; overscroll-behavior: contain; }
-  #file-preview-modal .body.center { display: flex; align-items: center; justify-content: center; }
+  /* 预览缩放比例徽标(挂在 .card 上,放大滚动时不跟随内容滚走) */
+  .zoom-badge {
+    position: absolute; right: 14px; bottom: 12px; z-index: 3;
+    background: rgba(0,0,0,0.62); color: #fff;
+    font-size: 12px; font-weight: 500; padding: 3px 9px;
+    border-radius: var(--r-md); pointer-events: none;
+    opacity: 0; transition: opacity .25s ease;
+  }
+  .zoom-badge.show { opacity: 1; }
+  #file-preview-modal .body.center { display: flex; align-items: safe center; justify-content: safe center; }
   #file-preview-modal .body .ph { color: var(--muted); font-size: 13px; text-align: center; }
   .preview-spinner {
     width: 22px; height: 22px; border-radius: 50%; margin: 0 auto 10px;
@@ -864,7 +873,7 @@
   #mini-preview-modal { background: rgba(0,0,0,0.18); z-index: 96; align-items: flex-start; justify-content: flex-end; padding: 56px 18px 0 0; }
   #mini-preview-modal .card {
     width: min(520px, 92vw); height: min(420px, 72vh);
-    display: flex; flex-direction: column;
+    display: flex; flex-direction: column; position: relative;
     box-shadow: var(--shadow-card);
   }
   #mini-preview-modal .hdr {
@@ -875,8 +884,8 @@
     flex: 1; font-weight: 500; overflow: hidden;
     text-overflow: ellipsis; white-space: nowrap;
   }
-  #mini-preview-modal .body { flex: 1; overflow: auto; padding: 10px; }
+  #mini-preview-modal .body { flex: 1; overflow: auto; padding: 10px; overscroll-behavior: contain; }
-  #mini-preview-modal .body.center { display: flex; align-items: center; justify-content: center; }
+  #mini-preview-modal .body.center { display: flex; align-items: safe center; justify-content: safe center; }
   #mini-preview-modal .body .ph { color: var(--muted); font-size: 12px; text-align: center; }
   #mini-preview-modal .body img.preview-img,
   #mini-preview-modal .body video.preview-video {

web/static/js/preview.js

@@ -62,12 +62,69 @@ export function _categorize(rel) {
 
 let _fpCurrentRel = null;
 
+// ───── 滚动不穿透 + 图片 Ctrl+滚轮缩放 ─────
+// body 元素在多次预览间复用,故 wheel 监听只在 init 时挂一次(_bindBodyWheel),
+// 缩放目标用 _zoomState 记录,避免每次预览重复 addEventListener 泄漏。
+const _zoomState = new WeakMap(); // bodyEl -> { img, scale, badge, timer }
+
+function _applyZoom(z) {
+  // 用 CSS zoom(非 transform):zoom 改变布局盒尺寸,放大后 body 才会出滚动条能看溢出部分
+  z.img.style.zoom = z.scale === 1 ? "" : z.scale;
+  z.img.style.cursor = z.scale === 1 ? "zoom-in" : "zoom-out";
+  z.badge.textContent = Math.round(z.scale * 100) + "%";
+  z.badge.classList.add("show");
+  if (z.timer) clearTimeout(z.timer);
+  z.timer = setTimeout(() => z.badge.classList.remove("show"), 1000);
+}
+
+// 给某 body 内的图片接上 Ctrl+滚轮缩放(badge + 双击复位),记录到 _zoomState。
+function _makeImageZoomable(bodyEl, img) {
+  _clearZoom(bodyEl);
+  const card = bodyEl.closest(".card") || bodyEl;
+  const badge = document.createElement("div");
+  badge.className = "zoom-badge"; // 挂到 card 而非 body,放大后 body 滚动时徽标不跟着滚走
+  card.appendChild(badge);
+  const z = { img, scale: 1, badge, timer: null };
+  _zoomState.set(bodyEl, z);
+  img.style.cursor = "zoom-in";
+  img.addEventListener("dblclick", () => { z.scale = 1; _applyZoom(z); });
+}
+
+function _clearZoom(bodyEl) {
+  const z = _zoomState.get(bodyEl);
+  if (!z) return;
+  if (z.timer) clearTimeout(z.timer);
+  z.badge.remove();
+  _zoomState.delete(bodyEl);
+}
+
+// 只挂一次:Ctrl+滚轮缩当前图片;否则拦住滚动穿透到背景对话列表。
+function _bindBodyWheel(bodyEl) {
+  bodyEl.addEventListener("wheel", (e) => {
+    const z = _zoomState.get(bodyEl);
+    if (e.ctrlKey) {
+      if (!z) return; // 无可缩放图片:不拦,交还浏览器
+      e.preventDefault(); // 有图片:吃掉浏览器页面缩放,改缩图片
+      z.scale = Math.min(8, Math.max(0.1, +(z.scale * (e.deltaY < 0 ? 1.1 : 1 / 1.1)).toFixed(3)));
+      _applyZoom(z);
+      return;
+    }
+    // 非 ctrl:容器不可滚 / 已到边界时阻断,避免冒泡到背景滚动对话列表
+    const canScroll = bodyEl.scrollHeight > bodyEl.clientHeight + 1;
+    if (!canScroll) { e.preventDefault(); return; }
+    const atTop = bodyEl.scrollTop <= 0 && e.deltaY < 0;
+    const atBottom = bodyEl.scrollTop + bodyEl.clientHeight >= bodyEl.scrollHeight - 1 && e.deltaY > 0;
+    if (atTop || atBottom) e.preventDefault();
+  }, { passive: false });
+}
+
 export async function openFilePreview(rel) {
   _fpCurrentRel = rel;
   const name = rel.split("/").pop() || rel;
   $("fp-name").textContent = name;
   $("fp-meta").textContent = "";
   const body = $("fp-body");
+  _clearZoom(body);
   body.className = "body center";
   body.innerHTML = `<div class="ph">加载中…</div>`;
   // 让出聊天输入区高度,弹框不遮挡 chat-form(无活动任务时 cf 隐藏,inset = 0)
@@ -122,6 +179,7 @@ function _showImage(blob) {
   img.className = "preview-img";
   img.src = url;
   body.appendChild(img);
+  _makeImageZoomable(body, img);
 }
 
 function _showVideo(blob) {
@@ -281,6 +339,7 @@ function _showFallback(msg) {
 export function closeFilePreview() {
   $("file-preview-modal").classList.remove("show");
   $("file-preview-modal").style.removeProperty("--preview-bottom-inset");
+  _clearZoom($("fp-body"));
   $("fp-body").innerHTML = "";
   _flushBlobUrls();
   _fpCurrentRel = null;
@@ -308,6 +367,7 @@ async function openMiniFilePreview(rel) {
   $("mp-name").textContent = name;
   $("mp-meta").textContent = "";
   const body = $("mp-body");
+  _clearZoom(body);
   body.className = "body center";
   body.innerHTML = `<div class="ph">加载中…</div>`;
   _flushMiniBlobUrls();
@@ -355,6 +415,7 @@ async function openMiniFilePreview(rel) {
       img.className = "preview-img";
       img.src = _trackMiniBlobUrl(blob);
       body.appendChild(img);
+      _makeImageZoomable(body, img);
     } else if (cat === "video") {
       body.className = "body center";
       const v = document.createElement("video");
@@ -391,6 +452,7 @@ function _showMiniFallback(msg) {
 }
 export function closeMiniPreview() {
   $("mini-preview-modal").classList.remove("show");
+  _clearZoom($("mp-body"));
   $("mp-body").innerHTML = "";
   _flushMiniBlobUrls();
   _mpCurrentRel = null;
@@ -402,6 +464,9 @@ export function closePreviewIfShowing(rel) {
   if (_mpCurrentRel === rel) closeMiniPreview();
 }
 
+_bindBodyWheel($("fp-body"));
+_bindBodyWheel($("mp-body"));
+
 $("fp-close").onclick = closeFilePreview;
 $("fp-download").onclick = () => { if (_fpCurrentRel) downloadFile(_fpCurrentRel); };
 $("file-preview-modal").addEventListener("click", (e) => {