界面优化,提高颜值方案

electron/main.ts

@@ -360,6 +360,11 @@ ipcMain.on('myreader:allow-close', (event) => {
   win.close()
 })
 
+ipcMain.handle('myreader:set-menu-visible', (_evt, visible: boolean): void => {
+  const menu = visible ? buildMenu() : null
+  Menu.setApplicationMenu(menu)
+})
+
 let pendingOpenPaths: string[] = []
 
 const gotTheLock = app.requestSingleInstanceLock()

electron/preload.ts

@@ -33,6 +33,7 @@ export interface MyReaderApi {
   deleteFile: (filePath: string) => Promise<void>
   renamePath: (oldPath: string, newName: string) => Promise<{ newPath: string }>
   allowClose: () => void
+  setMenuVisible: (visible: boolean) => Promise<void>
   onRequestClose: (handler: () => void) => () => void
   onMenuAction: (handler: (action: string) => void) => () => void
   onOpenFiles: (handler: (paths: string[]) => void) => () => void
@@ -59,6 +60,7 @@ const api: MyReaderApi = {
   allowClose: () => {
     ipcRenderer.send('myreader:allow-close')
   },
+  setMenuVisible: (visible: boolean) => ipcRenderer.invoke('myreader:set-menu-visible', visible),
   onRequestClose: (handler: () => void) => {
     const listener = (): void => {
       handler()

src/renderer/src/App.tsx

@@ -69,7 +69,7 @@ export default function App(): React.ReactElement {
     return Number.isFinite(n) ? clamp(n, 160, 400) : 220
   })
   const [statsHidden, setStatsHidden] = React.useState<boolean>(
-    () => localStorage.getItem(STATS_HIDDEN_KEY) === '1'
+    () => localStorage.getItem(STATS_HIDDEN_KEY) !== '0'
   )
   const [splitPct, setSplitPct] = React.useState<number>(() => {
     const n = Number(localStorage.getItem(SPLIT_KEY) ?? '48')
@@ -129,11 +129,13 @@ export default function App(): React.ReactElement {
   const [dragOver, setDragOver] = React.useState(false)
   const [imagePreviewData, setImagePreviewData] = React.useState<string | null>(null)
   const [imagePreviewFileName, setImagePreviewFileName] = React.useState('')
-  const [imageScale, setImageScale] = React.useState(1)
+  const [imageScale, setImageScale] = React.useState(5)
   const [imagePosition, setImagePosition] = React.useState({ x: 0, y: 0 })
   const [isDragging, setIsDragging] = React.useState(false)
   const [dragStart, setDragStart] = React.useState({ x: 0, y: 0 })
   const [isExportingImage, setIsExportingImage] = React.useState(false)
+  const [isFullscreen, setIsFullscreen] = React.useState(false)
+  const [toolbarCollapsed, setToolbarCollapsed] = React.useState(false)
 
   const activeTab = tabs.find((t) => t.id === activeId) ?? null
   const activeDoc = activeTab?.content ?? ''
@@ -147,6 +149,7 @@ export default function App(): React.ReactElement {
   const openingPathsRef = React.useRef<Set<string>>(new Set())
   const startupFilesHandledRef = React.useRef(false)
   const scrollPositionsRef = React.useRef<Map<string, number>>(new Map())
+  const previewScrollPositionsRef = React.useRef<Map<string, number>>(new Map())
   const prevActiveIdRef = React.useRef<string | null>(null)
 
   const refreshDir = React.useCallback(async (): Promise<void> => {
@@ -327,6 +330,13 @@ export default function App(): React.ReactElement {
     localStorage.setItem(AUTO_SAVE_KEY, autoSave ? '1' : '0')
   }, [autoSave])
 
+  React.useEffect(() => {
+    api.setMenuVisible(!isFullscreen)
+    if (isFullscreen) {
+      setPreviewMaxWidth(window.innerWidth)
+    }
+  }, [isFullscreen])
+
   React.useEffect(() => {
     if (!activeDoc) {
       setStatusText('')
@@ -559,6 +569,14 @@ export default function App(): React.ReactElement {
       if (editor) {
         scrollPositionsRef.current.set(prevId, editor.getScrollTop())
       }
+      const readPreviewOuter = readPreviewOuterRef.current
+      if (readPreviewOuter) {
+        previewScrollPositionsRef.current.set(prevId, readPreviewOuter.scrollTop)
+      }
+      const livePreviewOuter = livePreviewOuterRef.current
+      if (livePreviewOuter) {
+        previewScrollPositionsRef.current.set(prevId, livePreviewOuter.scrollTop)
+      }
     }
     prevActiveIdRef.current = activeId
   }, [activeId])
@@ -572,6 +590,15 @@ export default function App(): React.ReactElement {
         if (editor) editor.setScrollTop(saved)
       })
     }
+    const previewSaved = previewScrollPositionsRef.current.get(activeId)
+    if (previewSaved !== undefined && previewSaved > 0) {
+      requestAnimationFrame(() => {
+        const readPreviewOuter = readPreviewOuterRef.current
+        if (readPreviewOuter) readPreviewOuter.scrollTop = previewSaved
+        const livePreviewOuter = livePreviewOuterRef.current
+        if (livePreviewOuter) livePreviewOuter.scrollTop = previewSaved
+      })
+    }
   }, [editorMountKey])
 
   const scrollPreviewToAnchorId = React.useCallback(
@@ -893,7 +920,7 @@ export default function App(): React.ReactElement {
       const startX = e.clientX
       const startW = previewMaxWidth
       const onMove = (ev: MouseEvent): void => {
-        setPreviewMaxWidth(clamp(startW + (ev.clientX - startX), 420, 1400))
+        setPreviewMaxWidth(clamp(startW + (ev.clientX - startX), 420, 3000))
       }
       const onUp = (): void => {
         document.removeEventListener('mousemove', onMove)
@@ -1282,10 +1309,13 @@ ${previewHtml}
         setSearchVisible(false)
         setSearchQuery('')
       }
+      if (e.key === 'Escape' && isFullscreen) {
+        setIsFullscreen(false)
+      }
     }
     window.addEventListener('keydown', onKeyDown)
     return () => window.removeEventListener('keydown', onKeyDown)
-  }, [searchVisible, saveActive, newTabAction, activeId, requestCloseTab, cycleViewMode, openFileDialog, saveActiveAs, exportHtml, openFolderDialog, refreshDir, viewMode])
+  }, [searchVisible, saveActive, newTabAction, activeId, requestCloseTab, cycleViewMode, openFileDialog, saveActiveAs, exportHtml, openFolderDialog, refreshDir, viewMode, isFullscreen])
 
   if (!api) {
     return (
@@ -1365,114 +1395,146 @@ ${previewHtml}
         onCtxDelete={(path) => void deleteFileAt(path)}
       />
 
-      <header className="tab-bar">
+      {!isFullscreen && (
-        <TabBar
+        <header className="tab-bar">
-          tabs={tabs}
+          <TabBar
-          activeId={activeId}
+            tabs={tabs}
-          onSelect={setActiveId}
+            activeId={activeId}
-          onClose={requestCloseTab}
+            onSelect={setActiveId}
-          onCloseOthers={closeOtherTabs}
+            onClose={requestCloseTab}
-          onCloseAll={closeAllTabs}
+            onCloseOthers={closeOtherTabs}
-          onReorder={onReorderTabs}
+            onCloseAll={closeAllTabs}
-        />
+            onReorder={onReorderTabs}
-      </header>
+          />
+        </header>
+      )}
 
-      <div className="toolbar">
+      {!isFullscreen && (
-        <button type="button" onClick={() => void openFileDialog()}>
+        <div className={`toolbar${toolbarCollapsed ? ' toolbar-collapsed' : ''}`}>
-          打开
+          {toolbarCollapsed ? (
-        </button>
+            <button
-        <button type="button" onClick={() => void openFolderDialog()}>
+              type="button"
-          打开文件夹
+              onClick={() => setToolbarCollapsed(false)}
-        </button>
+              title="展开功能栏"
-        <button type="button" onClick={() => void saveActive()}>
+              className="toolbar-collapse-btn"
-          保存
+            >
-        </button>
+              ⋀
-        <button type="button" onClick={() => void saveActiveAs()}>
+            </button>
-          另存为
+          ) : (
-        </button>
+            <>
-        <button type="button" onClick={newTabAction}>
+              <button type="button" onClick={() => void openFileDialog()}>
-          新标签
+                打开
-        </button>
+              </button>
-        <button type="button" onClick={cycleViewMode} title="在 编辑 / 阅读 / 创作 / 分栏 间切换">
+              <button type="button" onClick={() => void openFolderDialog()}>
-          视图：{viewModeLabel(viewMode)}
+                打开文件夹
-        </button>
+              </button>
-        <button type="button" onClick={() => setSidebarHidden((v) => !v)}>
+              <button type="button" onClick={() => void saveActive()}>
-          {sidebarHidden ? '显示侧栏' : '隐藏侧栏'}
+                保存
-        </button>
+              </button>
-        <button type="button" onClick={() => setStatsHidden((v) => !v)}>
+              <button type="button" onClick={() => void saveActiveAs()}>
-          {statsHidden ? '显示统计' : '隐藏统计'}
+                另存为
-        </button>
+              </button>
-        <button
+              <button type="button" onClick={newTabAction}>
-          type="button"
+                新标签
-          onClick={exportHtml}
+              </button>
-          disabled={!activeDoc.trim()}
+              <button type="button" onClick={cycleViewMode} title="在 编辑 / 阅读 / 创作 / 分栏 间切换">
-          title="导出当前文档为 HTML 文件"
+                视图：{viewModeLabel(viewMode)}
-        >
+              </button>
-          导出 HTML
+              <button type="button" onClick={() => setSidebarHidden((v) => !v)}>
-        </button>
+                {sidebarHidden ? '显示侧栏' : '隐藏侧栏'}
-        <button
+              </button>
-          type="button"
+              <button type="button" onClick={() => setStatsHidden((v) => !v)}>
-          onClick={() => void handleExportImage()}
+                {statsHidden ? '显示统计' : '隐藏统计'}
-          disabled={!activeDoc.trim()}
+              </button>
-          title="导出当前文档为图片"
+              <button
-        >
+                type="button"
-          📷 导出图片
+                onClick={exportHtml}
-        </button>
+                disabled={!activeDoc.trim()}
-        <button
+                title="导出当前文档为 HTML 文件"
-          type="button"
+              >
-          onClick={() => setAutoSave((v) => !v)}
+                导出 HTML
-          title={autoSave ? '自动保存已开启（3秒无操作后保存）' : '自动保存已关闭'}
+              </button>
-          style={autoSave ? { borderColor: 'var(--accent)', color: 'var(--accent)' } : undefined}
+              <button
-        >
+                type="button"
-          {autoSave ? '自动保存：开' : '自动保存：关'}
+                onClick={() => void handleExportImage()}
-        </button>
+                disabled={!activeDoc.trim()}
-        <div className="toolbar-tail">
+                title="导出当前文档为图片"
-          <label className="bg-select">
+              >
-            行距
+                📷 导出图片
-            <input
+              </button>
-              type="number"
+              <button
-              className="toolbar-mini-input"
+                type="button"
-              min={1}
+                onClick={() => setIsFullscreen((v) => !v)}
-              max={3}
+                title={isFullscreen ? '退出全屏阅读' : '全屏阅读'}
-              step={0.05}
+              >
-              value={previewLineHeight}
+                {isFullscreen ? '⛶ 退出全屏' : '⛶ 全屏阅读'}
-              title="阅读视图行距（1–3）"
+              </button>
-              onChange={(e) => setPreviewLineHeight(e.target.value)}
+              <button
-              onBlur={() => {
+                type="button"
-                const n = Number.parseFloat(previewLineHeight)
+                onClick={() => setAutoSave((v) => !v)}
-                if (!Number.isFinite(n)) {
+                title={autoSave ? '自动保存已开启（3秒无操作后保存）' : '自动保存已关闭'}
-                  setPreviewLineHeight('1.5')
+                style={autoSave ? { borderColor: 'var(--accent)', color: 'var(--accent)' } : undefined}
-                  return
+              >
-                }
+                {autoSave ? '自动保存：开' : '自动保存：关'}
-                setPreviewLineHeight(String(clamp(n, 1, 3)))
+              </button>
-              }}
+              <div className="toolbar-tail">
-            />
+                <label className="bg-select">
-          </label>
+                  行距
-          <label className="bg-select">
+                  <input
-            字体
+                    type="number"
-            <select value={fontId} onChange={(e) => setFontId(e.target.value)}>
+                    className="toolbar-mini-input"
-              {FONTS.map((t) => (
+                    min={1}
-                <option key={t.id} value={t.id}>
+                    max={3}
-                  {t.name}
+                    step={0.05}
-                </option>
+                    value={previewLineHeight}
-              ))}
+                    title="阅读视图行距（1–3）"
-            </select>
+                    onChange={(e) => setPreviewLineHeight(e.target.value)}
-          </label>
+                    onBlur={() => {
-          <label className="bg-select">
+                      const n = Number.parseFloat(previewLineHeight)
-            背景
+                      if (!Number.isFinite(n)) {
-            <select value={bgId} onChange={(e) => setBgId(e.target.value)}>
+                        setPreviewLineHeight('1.5')
-              {BACKGROUNDS.map((t) => (
+                        return
-                <option key={t.id} value={t.id}>
+                      }
-                  {t.name}
+                      setPreviewLineHeight(String(clamp(n, 1, 3)))
-                </option>
+                    }}
-              ))}
+                  />
-            </select>
+                </label>
-          </label>
+                <label className="bg-select">
+                  字体
+                  <select value={fontId} onChange={(e) => setFontId(e.target.value)}>
+                    {FONTS.map((t) => (
+                      <option key={t.id} value={t.id}>
+                        {t.name}
+                      </option>
+                    ))}
+                  </select>
+                </label>
+                <label className="bg-select">
+                  背景
+                  <select value={bgId} onChange={(e) => setBgId(e.target.value)}>
+                    {BACKGROUNDS.map((t) => (
+                      <option key={t.id} value={t.id}>
+                        {t.name}{t.eyeCare ? ' 🛡️' : ''}
+                      </option>
+                    ))}
+                  </select>
+                </label>
+                <button
+                  type="button"
+                  onClick={() => setToolbarCollapsed(true)}
+                  title="收缩功能栏"
+                  className="toolbar-collapse-btn"
+                >
+                  ⋁
+                </button>
+              </div>
+            </>
+          )}
         </div>
-      </div>
+      )}
 
-      <div className="main">
+      <div className={`main${isFullscreen ? ' fullscreen-mode' : ''}`}>
-        {!sidebarHidden ? (
+        {!isFullscreen && !sidebarHidden ? (
           <>
             <aside className="sidebar" style={{ width: sidebarWidth, minWidth: sidebarWidth }}>
               <Sidebar
@@ -1509,7 +1571,7 @@ ${previewHtml}
               title="拖动调整侧栏宽度"
             />
           </>
-        ) : (
+        ) : !isFullscreen ? (
           <button
             type="button"
             className="sidebar-reopen"
@@ -1518,7 +1580,7 @@ ${previewHtml}
           >
             ⟨
           </button>
-        )}
+        ) : null}
 
         <ContentArea
           viewMode={viewMode}
@@ -1560,7 +1622,7 @@ ${previewHtml}
           onSetSearchQuery={setSearchQuery}
         />
 
-        {activeTab && !statsHidden ? (
+        {!isFullscreen && activeTab && !statsHidden ? (
           <StatsPanel
             doc={activeDoc}
             width={statsWidth}
@@ -1568,7 +1630,18 @@ ${previewHtml}
           />
         ) : null}
 
-        {statusText ? <div className="status-bar">{statusText}</div> : null}
+        {!isFullscreen && statusText ? <div className="status-bar">{statusText}</div> : null}
+
+        {isFullscreen && (
+          <button
+            type="button"
+            className="fullscreen-exit-btn"
+            onClick={() => setIsFullscreen(false)}
+            title="退出全屏阅读（Esc 键）"
+          >
+            ✕
+          </button>
+        )}
       </div>
       {dragOver ? (
         <div className="global-drop-overlay">
@@ -1592,19 +1665,54 @@ ${previewHtml}
           <div className="image-preview-modal" onClick={(e) => e.stopPropagation()}>
             <div className="image-preview-header">
               <h3 className="image-preview-title">📷 图片预览</h3>
-              <button
+              <div className="image-preview-header-actions">
-                className="image-preview-close"
+                <button
-                onClick={handleCloseImagePreview}
+                  className="image-preview-zoom-out"
-                title="关闭"
+                  onClick={() => setImageScale((s) => Math.max(0.25, s - 0.25))}
-              >
+                  title="缩小"
-                ✕
+                >
-              </button>
+                  −
+                </button>
+                <span className="image-preview-scale">{Math.round(imageScale * 100)}%</span>
+                <button
+                  className="image-preview-zoom-in"
+                  onClick={() => setImageScale((s) => Math.min(20, s + 0.25))}
+                  title="放大"
+                >
+                  +
+                </button>
+                <button
+                  className="image-preview-reset"
+                  onClick={handleResetZoom}
+                  title="重置"
+                >
+                  ⟲
+                </button>
+                <button
+                  className="image-preview-close"
+                  onClick={handleCloseImagePreview}
+                  title="关闭"
+                >
+                  ✕
+                </button>
+              </div>
             </div>
-            <div className="image-preview-content">
+            <div
+              className="image-preview-content"
+              onWheel={(e) => {
+                e.preventDefault()
+                const delta = e.deltaY > 0 ? -0.25 : 0.25
+                setImageScale((s) => Math.min(20, Math.max(0.25, s + delta)))
+              }}
+            >
               <img
                 src={imagePreviewData}
                 alt="预览"
                 className="image-preview-img"
+                style={{
+                  transform: `scale(${imageScale})`,
+                  transformOrigin: 'center center'
+                }}
               />
             </div>
             <div className="image-preview-footer">

src/renderer/src/ContentArea.tsx

@@ -112,9 +112,9 @@ export function ContentArea(props: ContentAreaProps): React.ReactElement {
   }
 
   return (
-    <>
+    <section className={`content${dragOver ? ' content-drag-over' : ''}`} onDrop={onDrop} onDragOver={onDragOver} onDragLeave={onDragLeave}>
       {searchVisible ? (
-        <div className="search-bar-toolbar">
+        <div className="search-bar">
           <input
             type="text"
             className="search-input"
@@ -148,8 +148,6 @@ export function ContentArea(props: ContentAreaProps): React.ReactElement {
           </button>
         </div>
       ) : null}
-
-      <section className={`content${dragOver ? ' content-drag-over' : ''}`} onDrop={onDrop} onDragOver={onDragOver} onDragLeave={onDragLeave}>
         {(viewMode === 'hybrid' || viewMode === 'live') && activeTab ? (
           <MarkdownFormatToolbar editorRef={editorRef} />
         ) : null}
@@ -158,11 +156,6 @@ export function ContentArea(props: ContentAreaProps): React.ReactElement {
             <div className="preview-outer" ref={readPreviewOuterRef}>
               <div className="preview-shell" style={{ maxWidth: previewMaxWidth }}>
                 {renderPreviewArticle(readPreviewArticleRef)}
-                <div
-                  className="preview-resizer"
-                  title="拖动调整阅读区宽度"
-                  onMouseDown={onStartPreviewWidthResize}
-                />
               </div>
             </div>
           ) : (
@@ -264,6 +257,5 @@ export function ContentArea(props: ContentAreaProps): React.ReactElement {
           )
         ) : null}
       </section>
-    </>
   )
 }

src/renderer/src/PreviewArticle.tsx

@@ -45,7 +45,7 @@ function mermaidSourceFromWrap(wrap: HTMLElement): string {
   return pre?.textContent ?? ''
 }
 
-async function renderMermaidIn(root: HTMLElement, isStale: () => boolean): Promise<void> {
+async function renderMermaidIn(root: HTMLElement, isStale: () => boolean, onZoom?: (source: string, svgHtml: string) => void): Promise<void> {
   const wraps = root.querySelectorAll<HTMLElement>('.md-diagram-wrap')
   if (wraps.length === 0) return
 
@@ -88,6 +88,19 @@ async function renderMermaidIn(root: HTMLElement, isStale: () => boolean): Promi
         })
       })
       wrap.dataset.mermaidRendered = '1'
+
+      if (onZoom) {
+        const zoomBtn = document.createElement('button')
+        zoomBtn.type = 'button'
+        zoomBtn.className = 'diagram-zoom-btn'
+        zoomBtn.innerHTML = '🔍'
+        zoomBtn.title = '放大查看'
+        zoomBtn.onclick = (e) => {
+          e.stopPropagation()
+          onZoom(source, svg)
+        }
+        wrap.appendChild(zoomBtn)
+      }
     } catch (err) {
       if (isStale()) return
       const msg = err instanceof Error ? err.message : String(err)
@@ -255,6 +268,11 @@ type Props = {
   onOpenExternal?: (url: string) => void | Promise<void>
 }
 
+type DiagramZoomState = {
+  source: string
+  svgHtml: string
+} | null
+
 export function PreviewArticle({
   html,
   articleRef,
@@ -274,6 +292,16 @@ export function PreviewArticle({
   const openExtRef = React.useRef(onOpenExternal)
   openExtRef.current = onOpenExternal
 
+  const [diagramZoom, setDiagramZoom] = React.useState<DiagramZoomState>(null)
+
+  const handleDiagramZoom = React.useCallback((source: string, svgHtml: string) => {
+    setDiagramZoom({ source, svgHtml })
+  }, [])
+
+  const handleDiagramCloseZoom = React.useCallback(() => {
+    setDiagramZoom(null)
+  }, [])
+
   const setRef = React.useCallback(
     (el: HTMLElement | null) => {
       innerRef.current = el
@@ -366,7 +394,7 @@ export function PreviewArticle({
     const gen = ++renderGenRef.current
     root.innerHTML = html
 
-    void renderMermaidIn(root, () => gen !== renderGenRef.current).catch((err) => {
+    void renderMermaidIn(root, () => gen !== renderGenRef.current, handleDiagramZoom).catch((err) => {
       console.warn("[Huangzhijun's Reader] mermaid batch failed", err)
     })
 
@@ -374,9 +402,23 @@ export function PreviewArticle({
       renderGenRef.current += 1
       disconnectMermaidObservers(root)
     }
-  }, [html])
+  }, [html, handleDiagramZoom])
 
   return (
-    <article ref={setRef} className="preview" onClickCapture={handleClickCapture} />
+    <>
+      <article ref={setRef} className="preview" onClickCapture={handleClickCapture} />
+      {diagramZoom ? (
+        <div className="diagram-zoom-overlay" role="presentation" onClick={handleDiagramCloseZoom}>
+          <div className="diagram-zoom-modal" role="dialog" aria-modal="true" onClick={(e) => e.stopPropagation()}>
+            <button type="button" className="diagram-zoom-close" onClick={handleDiagramCloseZoom} aria-label="关闭">
+              ✕
+            </button>
+            <div className="diagram-zoom-content">
+              <div className="diagram-zoom-svg" dangerouslySetInnerHTML={{ __html: diagramZoom.svgHtml }} />
+            </div>
+          </div>
+        </div>
+      ) : null}
+    </>
   )
 }

src/renderer/src/StatsPanel.tsx

@@ -176,7 +176,7 @@ export function StatsPanel({ doc, width, onResizeStart }: Props): React.ReactEle
               </div>
             </div>
           </div>
-          <div className="stats-panel-sign">made by huangzhijun 2026</div>
+
         </div>
       </aside>
     </>

src/renderer/src/appearance-styles.css

@@ -1,330 +1,201 @@
-/* 背景（12）：颜色变量，挂到 document.documentElement data-bg */
+:root {
-:root[data-bg='0'] {
+  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
-  --app-bg: #f3f4f6;
+  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
-  --panel-bg: #e5e7eb;
+  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
-  --text: #111827;
+  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
-  --muted: #6b7280;
+  --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.12);
-  --border: #d1d5db;
+  
-  --accent: #2563eb;
+  --radius-sm: 6px;
-  --btn-bg: #ffffff;
+  --radius-md: 10px;
-  --hover: rgba(0, 0, 0, 0.06);
+  --radius-lg: 16px;
-  --preview-bg: #ffffff;
+  --radius-xl: 24px;
-  --preview-text: #111827;
+  --radius-full: 9999px;
-  --preview-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
+  
-  --code-bg: #f9fafb;
+  --glass-border: rgba(255, 255, 255, 0.12);
+  --glass-bg: rgba(255, 255, 255, 0.06);
 }
+
+:root[data-bg='0'] {
+  --app-bg: #fafafa;
+  --bg-start: #fafafa;
+  --bg-mid: #f5f5f5;
+  --bg-end: #f0f0f0;
+  --panel-bg: #fafafa;
+  --text: #1c1917;
+  --muted: #78716c;
+  --border: #e7e5e4;
+  --accent: #6366f1;
+  --btn-bg: #f5f5f5;
+  --hover: rgba(99, 102, 241, 0.08);
+  --preview-bg: #fafafa;
+  --preview-text: #1c1917;
+  --preview-shadow: none;
+  --code-bg: #f5f5f4;
+  --glass-border: rgba(255, 255, 255, 0.6);
+  --glass-bg: rgba(255, 255, 255, 0.8);
+}
+
 :root[data-bg='1'] {
   --app-bg: #f4ecd8;
-  --panel-bg: #e8dfc8;
+  --bg-start: #f4ecd8;
+  --bg-mid: #f0e6c8;
+  --bg-end: #ebe0c8;
+  --panel-bg: #f2e8d0;
   --text: #3e3428;
   --muted: #7a6a58;
   --border: #d2c7b2;
   --accent: #8b4513;
-  --btn-bg: #fffaf0;
+  --btn-bg: #f0e6d6;
   --hover: rgba(62, 52, 40, 0.08);
-  --preview-bg: #fffaf0;
+  --preview-bg: #f4ecd8;
   --preview-text: #3e3428;
-  --preview-shadow: 0 8px 24px rgba(62, 52, 40, 0.12);
+  --preview-shadow: none;
   --code-bg: #f0e6d6;
 }
+
 :root[data-bg='2'] {
-  --app-bg: #0f172a;
+  --app-bg: #1a1a1a;
-  --panel-bg: #111c33;
+  --bg-start: #1a1a1a;
-  --text: #e5e7eb;
+  --bg-mid: #202020;
-  --muted: #94a3b8;
+  --bg-end: #1e1e1e;
-  --border: #1e293b;
+  --panel-bg: #1e1e1e;
-  --accent: #38bdf8;
+  --text: #fafafa;
-  --btn-bg: #1e293b;
+  --muted: #a3a3a3;
-  --hover: rgba(148, 163, 184, 0.12);
+  --border: #3f3f3f;
-  --preview-bg: #111827;
+  --accent: #60a5fa;
-  --preview-text: #e5e7eb;
+  --btn-bg: #202020;
-  --preview-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
+  --hover: rgba(96, 165, 250, 0.12);
-  --code-bg: #0b1224;
+  --preview-bg: #1a1a1a;
+  --preview-text: #fafafa;
+  --preview-shadow: none;
+  --code-bg: #141414;
+  --glass-border: rgba(255, 255, 255, 0.1);
+  --glass-bg: rgba(255, 255, 255, 0.06);
 }
+
 :root[data-bg='3'] {
-  --app-bg: #102216;
+  --app-bg: #f0fdf4;
-  --panel-bg: #143220;
+  --bg-start: #f0fdf4;
-  --text: #e7f7ec;
+  --bg-mid: #dcfce7;
-  --muted: #8fb39a;
+  --bg-end: #dcfce7;
-  --border: #1f3b2a;
+  --panel-bg: #e8f5ec;
-  --accent: #4ade80;
+  --text: #166534;
-  --btn-bg: #163527;
+  --muted: #22c55e;
-  --hover: rgba(74, 222, 128, 0.12);
+  --border: #bbf7d0;
-  --preview-bg: #132a1f;
+  --accent: #15803d;
-  --preview-text: #e7f7ec;
+  --btn-bg: #dcfce7;
-  --preview-shadow: 0 10px 36px rgba(0, 0, 0, 0.45);
+  --hover: rgba(21, 128, 61, 0.08);
-  --code-bg: #0d1f16;
+  --preview-bg: #f0fdf4;
+  --preview-text: #166534;
+  --preview-shadow: none;
+  --code-bg: #dcfce7;
 }
+
 :root[data-bg='4'] {
   --app-bg: linear-gradient(160deg, #e0f2fe 0%, #eef2ff 45%, #fdf4ff 100%);
-  --panel-bg: rgba(255, 255, 255, 0.72);
+  --panel-bg: rgba(255, 255, 255, 0.88);
   --text: #0f172a;
   --muted: #475569;
   --border: #cbd5f5;
   --accent: #4f46e5;
-  --btn-bg: rgba(255, 255, 255, 0.9);
+  --btn-bg: rgba(255, 255, 255, 0.95);
   --hover: rgba(79, 70, 229, 0.1);
-  --preview-bg: rgba(255, 255, 255, 0.92);
+  --preview-bg: rgba(255, 255, 255, 0.98);
   --preview-text: #0f172a;
-  --preview-shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
+  --preview-shadow: none;
   --code-bg: #f8fafc;
 }
-:root[data-bg='5'] {
-  --app-bg: #fafafa;
-  --panel-bg: #ffffff;
-  --text: #111111;
-  --muted: #737373;
-  --border: #e5e5e5;
-  --accent: #db2777;
-  --btn-bg: #ffffff;
-  --hover: rgba(219, 39, 119, 0.08);
-  --preview-bg: #ffffff;
-  --preview-text: #111111;
-  --preview-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
-  --code-bg: #f5f5f5;
-}
-:root[data-bg='6'] {
-  --app-bg: #121212;
-  --panel-bg: #1a1a1a;
-  --text: #fafafa;
-  --muted: #a3a3a3;
-  --border: #262626;
-  --accent: #f97316;
-  --btn-bg: #171717;
-  --hover: rgba(249, 115, 22, 0.15);
-  --preview-bg: #0a0a0a;
-  --preview-text: #fafafa;
-  --preview-shadow: 0 0 0 1px #262626;
-  --code-bg: #000000;
-}
-:root[data-bg='7'] {
-  --app-bg: #f5f3ff;
-  --panel-bg: #ede9fe;
-  --text: #312e81;
-  --muted: #6d28d9;
-  --border: #ddd6fe;
-  --accent: #7c3aed;
-  --btn-bg: #ffffff;
-  --hover: rgba(124, 58, 237, 0.1);
-  --preview-bg: #ffffff;
-  --preview-text: #312e81;
-  --preview-shadow: 0 10px 32px rgba(49, 46, 129, 0.12);
-  --code-bg: #f5f3ff;
-}
-:root[data-bg='8'] {
-  --app-bg: #1c1917;
-  --panel-bg: #292524;
-  --text: #fafaf9;
-  --muted: #a8a29e;
-  --border: #44403c;
-  --accent: #fbbf24;
-  --btn-bg: #292524;
-  --hover: rgba(251, 191, 36, 0.12);
-  --preview-bg: #1c1917;
-  --preview-text: #fafaf9;
-  --preview-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
-  --code-bg: #0c0a09;
-}
-:root[data-bg='9'] {
-  --app-bg: #1a1033;
-  --panel-bg: #221547;
-  --text: #f3e8ff;
-  --muted: #c4b5fd;
-  --border: #3b2a6b;
-  --accent: #a78bfa;
-  --btn-bg: #2a185f;
-  --hover: rgba(167, 139, 250, 0.15);
-  --preview-bg: #120c24;
-  --preview-text: #f3e8ff;
-  --preview-shadow: 0 14px 48px rgba(0, 0, 0, 0.55);
-  --code-bg: #0f0820;
-}
-:root[data-bg='10'] {
-  --app-bg: #e8f4fc;
-  --panel-bg: #d7eaf8;
-  --text: #0c4a6e;
-  --muted: #0369a1;
-  --border: #bae6fd;
-  --accent: #0284c7;
-  --btn-bg: #f0f9ff;
-  --hover: rgba(2, 132, 199, 0.12);
-  --preview-bg: #ffffff;
-  --preview-text: #0c4a6e;
-  --preview-shadow: 0 10px 28px rgba(12, 74, 110, 0.1);
-  --code-bg: #e0f2fe;
-}
-:root[data-bg='11'] {
-  --app-bg: #fdf2f4;
-  --panel-bg: #fce7eb;
-  --text: #881337;
-  --muted: #9f1239;
-  --border: #fbcfe8;
-  --accent: #db2777;
-  --btn-bg: #fff1f2;
-  --hover: rgba(219, 39, 119, 0.1);
-  --preview-bg: #ffffff;
-  --preview-text: #881337;
-  --preview-shadow: 0 10px 28px rgba(136, 19, 55, 0.08);
-  --code-bg: #ffe4e6;
-}
-:root[data-bg='12'] {
-  --app-bg: #18181b;
-  --panel-bg: #27272a;
-  --text: #fafafa;
-  --muted: #a1a1aa;
-  --border: #3f3f46;
-  --accent: #22d3ee;
-  --btn-bg: #27272a;
-  --hover: rgba(34, 211, 238, 0.12);
-  --preview-bg: #18181b;
-  --preview-text: #fafafa;
-  --preview-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
-  --code-bg: #09090b;
-}
-:root[data-bg='13'] {
-  --app-bg: #ecfeff;
-  --panel-bg: #cffafe;
-  --text: #0e7490;
-  --muted: #0891b2;
-  --border: #a5f3fc;
-  --accent: #0d9488;
-  --btn-bg: #f0fdfa;
-  --hover: rgba(13, 148, 136, 0.12);
-  --preview-bg: #ffffff;
-  --preview-text: #134e4a;
-  --preview-shadow: 0 10px 28px rgba(8, 145, 178, 0.1);
-  --code-bg: #ccfbf1;
-}
-:root[data-bg='14'] {
-  --app-bg: #faf5f0;
-  --panel-bg: #ede4d8;
-  --text: #422006;
-  --muted: #92400e;
-  --border: #d6c4b0;
-  --accent: #b45309;
-  --btn-bg: #fffbeb;
-  --hover: rgba(180, 83, 9, 0.1);
-  --preview-bg: #fffbeb;
-  --preview-text: #422006;
-  --preview-shadow: 0 10px 28px rgba(66, 32, 6, 0.08);
-  --code-bg: #fef3c7;
-}
-:root[data-bg='15'] {
-  --app-bg: #f0fdfa;
-  --panel-bg: #ccfbf1;
-  --text: #115e59;
-  --muted: #0f766e;
-  --border: #99f6e4;
-  --accent: #0d9488;
-  --btn-bg: #ecfdf5;
-  --hover: rgba(13, 148, 136, 0.12);
-  --preview-bg: #ffffff;
-  --preview-text: #134e4a;
-  --preview-shadow: 0 10px 28px rgba(17, 94, 89, 0.08);
-  --code-bg: #d1fae5;
-}
-:root[data-bg='16'] {
-  --app-bg: #f5f3ff;
-  --panel-bg: #ede9fe;
-  --text: #4c1d95;
-  --muted: #6d28d9;
-  --border: #ddd6fe;
-  --accent: #7c3aed;
-  --btn-bg: #faf5ff;
-  --hover: rgba(124, 58, 237, 0.1);
-  --preview-bg: #ffffff;
-  --preview-text: #4c1d95;
-  --preview-shadow: 0 10px 28px rgba(76, 29, 149, 0.08);
-  --code-bg: #ede9fe;
-}
-:root[data-bg='17'] {
-  --app-bg: #faf8f5;
-  --panel-bg: #f3efe8;
-  --text: #44403c;
-  --muted: #78716c;
-  --border: #e7e5e4;
-  --accent: #d97706;
-  --btn-bg: #ffffff;
-  --hover: rgba(217, 119, 6, 0.1);
-  --preview-bg: #ffffff;
-  --preview-text: #44403c;
-  --preview-shadow: 0 10px 28px rgba(68, 64, 60, 0.08);
-  --code-bg: #f5f5f4;
-}
-:root[data-bg='18'] {
-  --app-bg: #1c1917;
-  --panel-bg: #292524;
-  --text: #fafaf9;
-  --muted: #a8a29e;
-  --border: #44403c;
-  --accent: #eab308;
-  --btn-bg: #292524;
-  --hover: rgba(234, 179, 8, 0.12);
-  --preview-bg: #1c1917;
-  --preview-text: #fafaf9;
-  --preview-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
-  --code-bg: #0c0a09;
-}
-:root[data-bg='19'] {
-  --app-bg: #fdf4f8;
-  --panel-bg: #fce7f3;
-  --text: #831843;
-  --muted: #be185d;
-  --border: #fbcfe8;
-  --accent: #db2777;
-  --btn-bg: #fff1f2;
-  --hover: rgba(219, 39, 119, 0.1);
-  --preview-bg: #ffffff;
-  --preview-text: #831843;
-  --preview-shadow: 0 10px 28px rgba(131, 24, 67, 0.08);
-  --code-bg: #ffe4e6;
-}
-:root[data-bg='20'] {
-  --app-bg: #f1f5f9;
-  --panel-bg: #e2e8f0;
-  --text: #1e293b;
-  --muted: #64748b;
-  --border: #cbd5e1;
-  --accent: #475569;
-  --btn-bg: #ffffff;
-  --hover: rgba(71, 85, 105, 0.12);
-  --preview-bg: #ffffff;
-  --preview-text: #1e293b;
-  --preview-shadow: 0 10px 28px rgba(30, 41, 59, 0.1);
-  --code-bg: #f8fafc;
-}
-:root[data-bg='21'] {
-  --app-bg: #ecfdf5;
-  --panel-bg: #d1fae5;
-  --text: #14532d;
-  --muted: #166534;
-  --border: #bbf7d0;
-  --accent: #15803d;
-  --btn-bg: #f0fdf4;
-  --hover: rgba(21, 128, 61, 0.12);
-  --preview-bg: #ffffff;
-  --preview-text: #14532d;
-  --preview-shadow: 0 10px 28px rgba(20, 83, 45, 0.08);
-  --code-bg: #dcfce7;
-}
 
-/* Kindle 风格：暖灰纸面 + 轻微颗粒感（纯 CSS） */
+:root[data-bg='5'] {
-:root[data-bg='22'] {
   --app-bg: #e8e2d8;
-  --panel-bg: rgba(245, 241, 234, 0.94);
+  --bg-start: #e8e2d8;
+  --bg-mid: #e0d8cc;
+  --bg-end: #dcccb8;
+  --panel-bg: #e6ddd2;
   --text: #2d2a26;
   --muted: #6b6560;
   --border: #c9c2b8;
   --accent: #c2410c;
-  --btn-bg: #faf6ef;
+  --btn-bg: #e4dcc8;
   --hover: rgba(194, 65, 12, 0.08);
-  --preview-bg: #f7f3eb;
+  --preview-bg: #e8e2d8;
   --preview-text: #1f1c18;
-  --preview-shadow: 0 10px 28px rgba(45, 42, 38, 0.1);
+  --preview-shadow: none;
   --code-bg: #ede8df;
 }
 
-/* 字体：仅字体栈 — 20 种效果差异明显的字体 */
+:root[data-bg='6'] {
+  --app-bg: #f5efe6;
+  --bg-start: #f5efe6;
+  --bg-mid: #efe6d8;
+  --bg-end: #e8dfd0;
+  --panel-bg: #f1e9dd;
+  --text: #4a3f35;
+  --muted: #7a6b5e;
+  --border: #d9cfc0;
+  --accent: #a16207;
+  --btn-bg: #efe7db;
+  --hover: rgba(161, 98, 7, 0.08);
+  --preview-bg: #f5efe6;
+  --preview-text: #4a3f35;
+  --preview-shadow: none;
+  --code-bg: #efe7db;
+}
+
+:root[data-bg='7'] {
+  --app-bg: #0a0a0f;
+  --bg-start: #0a0a0f;
+  --bg-mid: #10101a;
+  --bg-end: #0f0f1a;
+  --panel-bg: #0f0f1a;
+  --text: #e2e8f0;
+  --muted: #718096;
+  --border: #2d2d44;
+  --accent: #6366f1;
+  --btn-bg: #12121e;
+  --hover: rgba(99, 102, 241, 0.15);
+  --preview-bg: #0a0a0f;
+  --preview-text: #e2e8f0;
+  --preview-shadow: none;
+  --code-bg: #070710;
+}
+
+:root[data-bg='8'] {
+  --app-bg: #e8e6e1;
+  --bg-start: #e8e6e1;
+  --bg-mid: #e0ddd5;
+  --bg-end: #d9d5cd;
+  --panel-bg: #e4e1d9;
+  --text: #404040;
+  --muted: #707070;
+  --border: #c5c1b8;
+  --accent: #6b7280;
+  --btn-bg: #e0ddd5;
+  --hover: rgba(107, 114, 128, 0.08);
+  --preview-bg: #e8e6e1;
+  --preview-text: #404040;
+  --preview-shadow: none;
+  --code-bg: #dfddd8;
+}
+
+:root[data-bg='9'] {
+  --app-bg: #f8f5f0;
+  --bg-start: #f8f5f0;
+  --bg-mid: #f0ebe1;
+  --bg-end: #e8dfd0;
+  --panel-bg: #f2ede3;
+  --text: #4a3e30;
+  --muted: #8a7d6e;
+  --border: #d8cec0;
+  --accent: #b45309;
+  --btn-bg: #f0ebe1;
+  --hover: rgba(180, 83, 9, 0.08);
+  --preview-bg: #f8f5f0;
+  --preview-text: #4a3e30;
+  --preview-shadow: none;
+  --code-bg: #f0ebe1;
+}
+
 :root[data-font='0'] {
   --font-ui: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
   --font-editor: ui-monospace, Menlo, Consolas, monospace;
@@ -426,115 +297,6 @@
   --font-preview: 'Space Mono', 'Courier New', monospace;
 }
 
-/* 新增 7 种背景（23-29），凑满 30 种 */
-:root[data-bg='23'] {
-  --app-bg: #fffdf5;
-  --panel-bg: #fef9e7;
-  --text: #5c4033;
-  --muted: #8b7355;
-  --border: #f0e6d3;
-  --accent: #d4a373;
-  --btn-bg: #ffffff;
-  --hover: rgba(92, 64, 51, 0.06);
-  --preview-bg: #ffffff;
-  --preview-text: #5c4033;
-  --preview-shadow: 0 10px 28px rgba(92, 64, 51, 0.08);
-  --code-bg: #faf5eb;
-}
-[data-bg='23'] ::selection,
-[data-bg='24'] ::selection,
-[data-bg='25'] ::selection,
-[data-bg='26'] ::selection,
-[data-bg='27'] ::selection,
-[data-bg='28'] ::selection,
-[data-bg='29'] ::selection {
-  background: var(--border);
-}
-:root[data-bg='24'] {
-  --app-bg: #fef4e8;
-  --panel-bg: #fce8d0;
-  --text: #7b341e;
-  --muted: #c05621;
-  --border: #fbd38d;
-  --accent: #dd6b20;
-  --btn-bg: #fffaf0;
-  --hover: rgba(221, 107, 32, 0.1);
-  --preview-bg: #fff7ed;
-  --preview-text: #7b341e;
-  --preview-shadow: 0 10px 28px rgba(123, 52, 30, 0.1);
-  --code-bg: #feebc8;
-}
-:root[data-bg='25'] {
-  --app-bg: #eef6ff;
-  --panel-bg: #dbeafe;
-  --text: #1e3a5f;
-  --muted: #3b82f6;
-  --border: #bfdbfe;
-  --accent: #2563eb;
-  --btn-bg: #f8faff;
-  --hover: rgba(37, 99, 235, 0.1);
-  --preview-bg: #ffffff;
-  --preview-text: #1e3a5f;
-  --preview-shadow: 0 10px 28px rgba(30, 58, 95, 0.08);
-  --code-bg: #e0edff;
-}
-:root[data-bg='26'] {
-  --app-bg: #0a0a0f;
-  --panel-bg: #12121e;
-  --text: #e2e8f0;
-  --muted: #718096;
-  --border: #2d2d44;
-  --accent: #6366f1;
-  --btn-bg: #1a1a2e;
-  --hover: rgba(99, 102, 241, 0.15);
-  --preview-bg: #0f0f1a;
-  --preview-text: #e2e8f0;
-  --preview-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
-  --code-bg: #070710;
-}
-:root[data-bg='27'] {
-  --app-bg: #fdf2e9;
-  --panel-bg: #fae2d0;
-  --text: #7a2e1a;
-  --muted: #c05621;
-  --border: #f6c8a8;
-  --accent: #c2410c;
-  --btn-bg: #fff8f3;
-  --hover: rgba(194, 65, 12, 0.1);
-  --preview-bg: #fff5ed;
-  --preview-text: #7a2e1a;
-  --preview-shadow: 0 10px 28px rgba(122, 46, 26, 0.08);
-  --code-bg: #fde8d0;
-}
-:root[data-bg='28'] {
-  --app-bg: #eef2f7;
-  --panel-bg: #e0e6ef;
-  --text: #2d3748;
-  --muted: #718096;
-  --border: #d1d9e6;
-  --accent: #4a5568;
-  --btn-bg: #f8faff;
-  --hover: rgba(74, 85, 104, 0.1);
-  --preview-bg: #ffffff;
-  --preview-text: #2d3748;
-  --preview-shadow: 0 10px 28px rgba(45, 55, 72, 0.08);
-  --code-bg: #e8edf5;
-}
-:root[data-bg='29'] {
-  --app-bg: #1a1423;
-  --panel-bg: #2a1f3d;
-  --text: #e8e0f0;
-  --muted: #9b8ab0;
-  --border: #3d2f57;
-  --accent: #b39ddb;
-  --btn-bg: #2a1f3d;
-  --hover: rgba(179, 157, 219, 0.15);
-  --preview-bg: #151020;
-  --preview-text: #e8e0f0;
-  --preview-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
-  --code-bg: #100c1a;
-}
-
 :root[data-bg='4'] .toolbar,
 :root[data-bg='4'] .tab-bar,
 :root[data-bg='4'] .sidebar {

src/renderer/src/appearance.ts

@@ -1,38 +1,16 @@
-/** 背景 id 0–29，对应 `appearance-styles.css` 中 `:root[data-bg]`。 */
+export const BACKGROUNDS: { id: string; name: string; eyeCare?: boolean }[] = [
-export const BACKGROUNDS: { id: string; name: string }[] = [
+  { id: '0', name: '极简白' },
-  { id: '0', name: '暖雾灰' },
+  { id: '1', name: '羊皮纸', eyeCare: true },
-  { id: '1', name: '羊皮纸' },
+  { id: '2', name: '深空灰' },
-  { id: '2', name: '深海蓝' },
+  { id: '3', name: '护眼绿', eyeCare: true },
-  { id: '3', name: '森绿' },
   { id: '4', name: '极光渐变' },
-  { id: '5', name: '极简粉' },
+  { id: '5', name: 'Kindle 纸感', eyeCare: true },
-  { id: '6', name: '暗夜橙' },
+  { id: '6', name: '宣纸黄', eyeCare: true },
-  { id: '7', name: '薰衣草' },
+  { id: '7', name: '暗夜紫' },
-  { id: '8', name: '暖石褐' },
+  { id: '8', name: '磨砂灰', eyeCare: true },
-  { id: '9', name: '星夜紫' },
+  { id: '9', name: '茶纸棕', eyeCare: true }
-  { id: '10', name: '霜青' },
-  { id: '11', name: '玫瑰灰' },
-  { id: '12', name: '石墨黑' },
-  { id: '13', name: '薄荷冰' },
-  { id: '14', name: '焦糖拿铁' },
-  { id: '15', name: '青瓷' },
-  { id: '16', name: '暮光紫灰' },
-  { id: '17', name: '沙岸米' },
-  { id: '18', name: '松烟墨' },
-  { id: '19', name: '樱粉雾' },
-  { id: '20', name: '钢蓝灰' },
-  { id: '21', name: '苔痕绿' },
-  { id: '22', name: 'Kindle 纸感' },
-  { id: '23', name: '暖雾白' },
-  { id: '24', name: '落日橘' },
-  { id: '25', name: '冰川蓝' },
-  { id: '26', name: '暗夜墨' },
-  { id: '27', name: '陶土红' },
-  { id: '28', name: '灰蓝雾' },
-  { id: '29', name: '夜雾紫' }
 ]
 
-/** 字体 id 0–19，对应 `:root[data-font]`。 */
 export const FONTS: { id: string; name: string }[] = [
   { id: '0', name: '系统默认' },
   { id: '1', name: '经典衬线' },
@@ -60,7 +38,7 @@ export type ViewMode = 'read' | 'hybrid' | 'live'
 
 export function validBackgroundId(s: string | null): string | null {
   if (s === null) return null
-  return /^([0-9]|[12][0-9])$/.test(s) ? s : null
+  return /^[0-9]$/.test(s) ? s : null
 }
 
 export function validFontId(s: string | null): string | null {

src/renderer/src/markdown.ts

@@ -170,9 +170,8 @@ md.renderer.rules.fence = (tokens, idx, options, env, self) => {
 
   if (isMermaidFence(lang, raw)) {
     const trimmed = raw.trim()
-    const escaped = md.utils.escapeHtml(trimmed)
     const dataSrc = md.utils.escapeHtml(encodeURIComponent(trimmed))
-    return `<div class="md-diagram-wrap" data-source-line="${token.map[0]}" data-source-line-end="${codeEndLine}" data-mermaid-src="${dataSrc}"><pre class="mermaid">${escaped}</pre></div>`
+    return `<div class="md-diagram-wrap" data-source-line="${token.map[0]}" data-source-line-end="${codeEndLine}" data-mermaid-src="${dataSrc}"><pre class="mermaid">${trimmed}</pre></div>`
   }
 
   const highlighted = highlightCodeBlock(raw, lang)
@@ -184,7 +183,7 @@ md.renderer.rules.fence = (tokens, idx, options, env, self) => {
 
 const purifyOpts: Parameters<typeof DOMPurify.sanitize>[1] = {
   USE_PROFILES: { html: true },
-  ADD_TAGS: ['span', 'mark', 'kbd', 'sup', 'sub', 'details', 'summary', 'font', 'div'],
+  ADD_TAGS: ['span', 'mark', 'kbd', 'sup', 'sub', 'details', 'summary', 'font', 'div', 'b', 'strong', 'em', 'i', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6'],
   ADD_ATTR: [
     'style',
     'color',
@@ -228,7 +227,8 @@ export type RenderMarkdownEnv = {
 }
 
 export function renderMarkdown(src: string, env?: RenderMarkdownEnv): string {
-  const input = typeof src === 'string' ? src : ''
+  let input = typeof src === 'string' ? src : ''
+  input = input.replace(/([^\n])(#{1,6}\s)/g, (_match, p1, p2) => `${p1}\n${p2}`)
   const renderEnv = env ?? {}
   try {
     const raw = md.render(input, renderEnv)
@@ -274,13 +274,36 @@ export function isValidOutlineHeading(displayText: string, rawLine: string): boo
   return true
 }
 
+const FENCE_OPEN_RE = /^(\s*)(`{3,}|~{3,})(.*)$/
+
+function isFenceClose(line: string, fenceChar: string, fenceLen: number): boolean {
+  return new RegExp(`^\\s*\\${fenceChar}{${fenceLen},}\\s*$`).test(line)
+}
+
 /** 仅从 ATX `#` 标题提取；`line` 为 0-based。 */
 export function extractOutline(src: string): OutlineItem[] {
   const input = typeof src === 'string' ? src : ''
   const lines = input.split(/\r?\n/)
   const out: OutlineItem[] = []
+  let inFence = false
+
   for (let i = 0; i < lines.length; i++) {
     const raw = lines[i] ?? ''
+
+    const fenceOpen = FENCE_OPEN_RE.exec(raw)
+    if (fenceOpen) {
+      inFence = true
+      const fenceChar = fenceOpen[2]![0]!
+      const fenceLen = fenceOpen[2]!.length
+      while (i < lines.length && !isFenceClose(lines[i] ?? '', fenceChar, fenceLen)) {
+        i++
+      }
+      inFence = false
+      continue
+    }
+
+    if (inFence) continue
+
     const m = /^(#{1,6})\s+(.+)$/.exec(raw)
     if (!m) continue
     const level = m[1]!.length