feat: 完善本地书库与发布更新流程

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

src/ui/views/library.js

@@ -13,9 +13,21 @@ const Library = (() => {
     grid = $('libGrid');
     statusEl = $('libStatus');
     $('addLocalBtn').onclick = addLocal;
+    $('rescanBtn').onclick = rescan;
     window.api.library.onChanged(() => { dirty = true; refresh(true); });
   }
 
+  async function rescan() {
+    const btn = $('rescanBtn');
+    btn.disabled = true;
+    btn.textContent = '扫描中...';
+    const r = await window.api.library.scan();
+    btn.textContent = r.ok && r.data && r.data.added ? `新增 ${r.data.added} 本 ✓` : '已是最新 ✓';
+    dirty = true;
+    await refresh(true);
+    setTimeout(() => { btn.textContent = '重新扫描'; btn.disabled = false; }, 2000);
+  }
+
   function getSortMode() { return sortMode; }
   function setSortMode(m) {
     sortMode = m;
@@ -30,16 +42,20 @@ const Library = (() => {
     dirty = false;
     if (!res.ok) { statusEl.textContent = '加载失败：' + res.error; return; }
     const items = res.data.slice().sort(SORTERS[sortMode] || SORTERS.added);
-    statusEl.textContent = `共 ${items.length} 条`;
+    const missingCount = items.filter((it) => it.missing).length;
+    statusEl.textContent = `共 ${items.length} 条` + (missingCount ? `，${missingCount} 条文件缺失` : '');
     if (!items.length) {
       grid.innerHTML = '<div class="empty">书库为空，去「检索」页添加文献 / 图书吧</div>';
       return;
     }
     grid.innerHTML = items.map((it) => {
-      const hasFile = (it.files || []).some((f) => f.path);
-      const badge = hasFile
+      // exists 由主进程按实际磁盘状态给出：文件被手动删掉时要如实反映
+      const openable = (it.files || []).some((f) => f.exists);
+      const badge = openable
         ? '<span class="card-badge">已下载</span>'
-        : '<span class="card-badge miss">未下载</span>';
+        : ((it.files || []).length
+          ? '<span class="card-badge miss">文件缺失</span>'
+          : '<span class="card-badge miss">未下载</span>');
       return `
       <div class="card" data-id="${escapeHtml(it.id)}">
         <div class="card-cover" style="${coverStyle(it.cover)}">${it.cover ? '' : `<div class="ph">${escapeHtml(it.title)}</div>`}</div>
@@ -47,7 +63,8 @@ const Library = (() => {
         ${(it.authors && it.authors.length) ? `<div class="card-sub">${escapeHtml(it.authors.slice(0, 2).join(', '))}</div>` : ''}
         ${badge}
         <div class="lib-card-actions">
-          <button class="open-btn" data-act="open" ${hasFile ? '' : 'disabled'}>打开</button>
+          <button class="open-btn" data-act="open" ${openable ? '' : 'disabled'}>打开</button>
+          ${openable ? '<button data-act="reveal">定位</button>' : ''}
           ${it.url ? '<button data-act="page">页面</button>' : ''}
           <button data-act="remove">移除</button>
         </div>
@@ -67,8 +84,13 @@ const Library = (() => {
     if (!res.ok || !res.data) return;
     const it = res.data;
     if (act === 'open') {
-      const f = (it.files || []).find((x) => x.path);
-      if (f) window.api.openPath(f.path);
+      const f = (it.files || []).find((x) => x.exists) || (it.files || [])[0];
+      if (!f) return;
+      const r = await window.api.openPath(f.path);
+      if (!r.ok) await confirmModal('打开失败', r.error || '无法打开该文件');
+    } else if (act === 'reveal') {
+      const f = (it.files || []).find((x) => x.exists);
+      if (f) window.api.showItem(f.path);
     } else if (act === 'page') {
       if (it.url) window.api.openExternal(it.url);
     } else if (act === 'remove') {