7 changed files with 10 additions and 227 deletions
--- a/input.css
+++ b/input.css
@ -663,29 +663,6 @@
    display: block;
  }

-  /* ── mermaid 图表容器 ──
-     data-mermaid-rendered 由 yggdrasil-core/mermaid.ts 渲染成功后标记在 <pre> 上。
-     渲染后 pre 唯一子元素是 <svg>（mermaid 块不注入 copy-code 按钮），flex 安全。
-     居中 + 缩放适配宽度，消除常规图的横向滚动；超宽图 overflow-x:auto 兜底。 */
-  .md-content pre[data-mermaid-rendered] {
-    display: flex;
-    justify-content: center;
-    align-items: center;
-    padding: 24px 16px;
-    overflow-x: auto;
-  }
-
-  .md-content pre[data-mermaid-rendered] > svg {
-    max-width: 100%;
-    height: auto;
-    display: block;
-  }
-
-  /* 渲染失败：保留原始源码，加 accent 色左边条提示（站点 accent 为绿，沿用配色体系） */
-  .md-content pre.mermaid-error {
-    border-left: 3px solid var(--color-paper-accent);
-  }
-
  .anchor {
    display: none;
    text-decoration: none;
--- a/libs/yggdrasil-core/src/mermaid.test.ts
+++ b/libs/yggdrasil-core/src/mermaid.test.ts
@ -67,46 +67,10 @@ describe('initMermaid', () => {
    window.__initMermaid('.post-content', 'dark');

    await vi.waitFor(() => {
-      // base 主题 + darkMode 标志：让 themeVariables 完全控制 Catppuccin 调色板
-      expect(mockInitialize).toHaveBeenCalledWith(
-        expect.objectContaining({ theme: 'base', darkMode: true }),
-      );
+      expect(mockInitialize).toHaveBeenCalledWith(expect.objectContaining({ theme: 'dark' }));
    });
  });

-  it('亮/暗主题传入对应的 Catppuccin themeVariables', async () => {
-    // 暗色：Mocha 调色板（背景 #313244、文字 #cdd6f4）
-    const darkRoot = document.createElement('div');
-    darkRoot.className = 'post-content';
-    darkRoot.innerHTML = '<pre><code class="language-mermaid">graph TD; A--&gt;B</code></pre>';
-    document.body.appendChild(darkRoot);
-    window.__initMermaid('.post-content', 'dark');
-    await vi.waitFor(() => {
-      expect(mockInitialize).toHaveBeenCalled();
-    });
-    const darkCall = mockInitialize.mock.calls.slice(-1)[0]?.[0] as Record<string, unknown>;
-    const darkVars = darkCall.themeVariables as Record<string, string>;
-    expect(darkVars.background).toBe('#313244');
-    expect(darkVars.primaryTextColor).toBe('#cdd6f4');
-    expect(darkVars.lineColor).toBe('#a6adc8');
-
-    // 亮色：Latte 调色板（背景 #dce0e8、文字 #4c4f69）
-    document.body.innerHTML = '';
-    const lightRoot = document.createElement('div');
-    lightRoot.className = 'post-content';
-    lightRoot.innerHTML = '<pre><code class="language-mermaid">graph TD; A--&gt;B</code></pre>';
-    document.body.appendChild(lightRoot);
-    window.__initMermaid('.post-content', 'light');
-    await vi.waitFor(() => {
-      expect(mockInitialize).toHaveBeenCalled();
-    });
-    const lightCall = mockInitialize.mock.calls.slice(-1)[0]?.[0] as Record<string, unknown>;
-    const lightVars = lightCall.themeVariables as Record<string, string>;
-    expect(lightVars.background).toBe('#dce0e8');
-    expect(lightVars.primaryTextColor).toBe('#4c4f69');
-    expect(lightVars.lineColor).toBe('#5c5f77');
-  });
-
  it('幂等：重复调用不重复渲染已处理的块', async () => {
    const root = document.createElement('div');
    root.className = 'post-content';
@ -173,9 +137,7 @@ describe('initMermaid', () => {
    await vi.waitFor(() => {
      expect(mockRender.mock.calls.length).toBeGreaterThan(firstRenderCalls);
    });
-    expect(mockInitialize).toHaveBeenLastCalledWith(
-      expect.objectContaining({ theme: 'base', darkMode: true }),
-    );
+    expect(mockInitialize).toHaveBeenLastCalledWith(expect.objectContaining({ theme: 'dark' }));
    expect(root.querySelector('pre')?.dataset.mermaidTheme).toBe('dark');
  });

--- a/libs/yggdrasil-core/src/mermaid.ts
+++ b/libs/yggdrasil-core/src/mermaid.ts
@ -30,127 +30,6 @@ type MermaidApi = {
  render: (id: string, text: string) => Promise<{ svg: string }>;
 };

-/**
- * Catppuccin themeVariables（与站点 --color-paper-* / .tmTheme 调色板对齐）。
- *
- * mermaid 把颜色烤进 SVG 内联 style，无法靠 CSS 原地改主题，故须在 initialize 时注入。
- * 用 `theme: 'base'`（非 'default'/'dark'）：base 主题不硬编码颜色，themeVariables 能完全
- * 控制调色板；'default' 主题硬编码 mainBkg=#ECECFF 等会阻断覆盖。
- *
- * 设计哲学：极简卡片化——节点用 surface 色阶（卡片感）、边框/连线用 subtext 色阶（克制）、
- * 文字用 primary text。不滥用强调色，绿/紫等 accent 留给作者用 classDef 手动强调。
- * hex 值取自 themes/Catppuccin Latte.tmTheme 与 Catppuccin Mocha.tmTheme。
- *
- * 覆盖的字段涵盖 flowchart / sequence / class 三类图（测试文章用到的全部类型）。
- */
-
-/** Latte（亮）主题：节点 surface 色阶、文字 #4c4f69、连线 subtext1 #5c5f77。 */
-const LATTE_VARS = {
-  background: '#dce0e8', // = --color-paper-code-block，图背景与 pre 无缝衔接
-  // 节点填充：surface 色阶递进（主/次/三级），卡片质感
-  primaryColor: '#e6e9ef',
-  secondaryColor: '#ccd0da',
-  tertiaryColor: '#bcc0cc',
-  mainBkg: '#e6e9ef',
-  nodeBkg: '#e6e9ef',
-  secondBkg: '#ccd0da',
-  // 节点边框：surface1 偏冷灰
-  primaryBorderColor: '#bcc0cc',
-  secondaryBorderColor: '#acb0be',
-  tertiaryBorderColor: '#9ca0b0',
-  nodeBorder: '#bcc0cc',
-  clusterBorder: '#bcc0cc',
-  labelBoxBorderColor: '#bcc0cc',
-  // 文字：primary text #4c4f69
-  primaryTextColor: '#4c4f69',
-  secondaryTextColor: '#5c5f77',
-  tertiaryTextColor: '#6c6f85',
-  textColor: '#4c4f69',
-  nodeTextColor: '#4c4f69',
-  titleColor: '#4c4f69',
-  classText: '#4c4f69',
-  labelTextColor: '#4c4f69',
-  // 连线/箭头：subtext1 #5c5f77
-  lineColor: '#5c5f77',
-  defaultLinkColor: '#5c5f77',
-  arrowheadColor: '#5c5f77',
-  // 时序图
-  actorBkg: '#e6e9ef',
-  actorBorder: '#bcc0cc',
-  actorTextColor: '#4c4f69',
-  actorLineColor: '#5c5f77',
-  signalColor: '#5c5f77',
-  signalTextColor: '#4c4f69',
-  loopTextColor: '#4c4f69',
-  sequenceNumberColor: '#eff1f5',
-  activationBkgColor: '#ccd0da',
-  activationBorderColor: '#bcc0cc',
-  // 边标签 / 子图背景
-  edgeLabelBackground: '#eff1f5',
-  labelBoxBkgColor: '#eff1f5',
-  clusterBkg: 'rgba(239, 241, 245, 0.5)',
-  // 注释：低饱和黄（Latte yellow #df8e1d）
-  noteBkgColor: 'rgba(223, 142, 29, 0.15)',
-  noteBorderColor: '#df8e1d',
-  noteTextColor: '#4c4f69',
-  // 字体：与正文 sans 对齐，中文友好
-  fontFamily:
-    "-apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif",
-  fontSize: '16px',
-} as const;
-
-/** Mocha（暗）主题：节点 surface 色阶、文字 #cdd6f4、连线 subtext0 #a6adc8。 */
-const MOCHA_VARS = {
-  background: '#313244', // = --color-paper-code-block（暗）
-  primaryColor: '#45475a',
-  secondaryColor: '#585b70',
-  tertiaryColor: '#1e1e2e',
-  mainBkg: '#45475a',
-  nodeBkg: '#45475a',
-  secondBkg: '#585b70',
-  primaryBorderColor: '#585b70',
-  secondaryBorderColor: '#45475a',
-  tertiaryBorderColor: '#313244',
-  nodeBorder: '#585b70',
-  clusterBorder: '#585b70',
-  labelBoxBorderColor: '#585b70',
-  primaryTextColor: '#cdd6f4',
-  secondaryTextColor: '#bac2de',
-  tertiaryTextColor: '#a6adc8',
-  textColor: '#cdd6f4',
-  nodeTextColor: '#cdd6f4',
-  titleColor: '#cdd6f4',
-  classText: '#cdd6f4',
-  labelTextColor: '#cdd6f4',
-  lineColor: '#a6adc8',
-  defaultLinkColor: '#a6adc8',
-  arrowheadColor: '#a6adc8',
-  actorBkg: '#45475a',
-  actorBorder: '#585b70',
-  actorTextColor: '#cdd6f4',
-  actorLineColor: '#a6adc8',
-  signalColor: '#a6adc8',
-  signalTextColor: '#cdd6f4',
-  loopTextColor: '#cdd6f4',
-  sequenceNumberColor: '#1e1e2e',
-  activationBkgColor: '#585b70',
-  activationBorderColor: '#6c7086',
-  edgeLabelBackground: '#1e1e2e',
-  labelBoxBkgColor: '#1e1e2e',
-  clusterBkg: 'rgba(30, 30, 46, 0.5)',
-  noteBkgColor: 'rgba(249, 226, 175, 0.12)',
-  noteBorderColor: '#f9e2af',
-  noteTextColor: '#cdd6f4',
-  fontFamily:
-    "-apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif",
-  fontSize: '16px',
-} as const;
-
-/** 按主题返回对应 Catppuccin themeVariables。 */
-function themeVarsFor(theme: ThemeName): Record<string, unknown> {
-  return theme === 'dark' ? { ...MOCHA_VARS } : { ...LATTE_VARS };
-}
-
 declare global {
  interface Window {
    MermaidRenderer?: MermaidApi;
@ -223,18 +102,8 @@ async function renderBlock(pre: HTMLPreElement, source: string, theme: ThemeName
  const mermaid = await loadMermaid();
  mermaid.initialize({
    startOnLoad: false,
-    // base 主题不硬编码颜色，让 themeVariables 完全控制 Catppuccin 调色板。
-    theme: 'base',
-    darkMode: theme === 'dark',
+    theme: theme === 'dark' ? 'dark' : 'default',
    securityLevel: 'strict',
-    // flowchart：平滑曲线 + 边缘留白 + 缩放至容器宽度（配合 CSS 消除横向滚动）。
-    flowchart: {
-      curve: 'basis',
-      diagramPadding: 16,
-      useMaxWidth: true,
-      htmlLabels: true,
-    },
-    themeVariables: themeVarsFor(theme),
  });
  const id = `mermaid-svg-${++renderCounter}`;
  const { svg } = await mermaid.render(id, source);
--- a/public/icons/search_24dp_E3E3E3_FILL0_wght400_GRAD0_opsz24.svg
+++ b/public/icons/search_24dp_E3E3E3_FILL0_wght400_GRAD0_opsz24.svg
@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#e3e3e3"><path d="M784-120 532-372q-30 24-69 38t-83 14q-109 0-184.5-75.5T120-580q0-109 75.5-184.5T380-840q109 0 184.5 75.5T640-580q0 44-14 83t-38 69l252 252-56 56ZM380-400q75 0 127.5-52.5T560-580q0-75-52.5-127.5T380-760q-75 0-127.5 52.5T200-580q0 75 52.5 127.5T380-400Z"/></svg>
--- a/src/components/frontend_layout.rs
+++ b/src/components/frontend_layout.rs
@ -6,7 +6,7 @@
 use dioxus::prelude::*;

 use crate::components::footer::Footer;
-use crate::components::header::{Header, SearchIconLink};
+use crate::components::header::Header;
 use crate::components::nav::use_nav_items;
 use crate::components::skeletons::archive_skeleton::ArchiveSkeleton;
 use crate::components::skeletons::delayed_skeleton::DelayedSkeleton;
@ -56,7 +56,6 @@ pub fn FrontendLayout() -> Element {
                max_width: "max-w-4xl",
                nav_items,
                right_content: rsx! {
-                    SearchIconLink {}
                    ThemeToggle {}
                },
            }
--- a/src/components/header.rs
+++ b/src/components/header.rs
@ -170,30 +170,3 @@ fn MobileNavItem(
        }
    }
 }
-
-/// 搜索图标链接：置于 Header 右侧（主题切换左边），点击跳转搜索页。
-///
-/// 样式与 `ThemeToggle` 对齐（圆形 padding + currentColor 图标），保持右侧
-/// 图标组视觉一致。SVG 来自 `public/icons/search_24dp_E3E3E3_FILL0_wght400_GRAD0_opsz24.svg`，
-/// 改用 `fill: "currentColor"` 以适配明暗主题。
-#[component]
-pub fn SearchIconLink() -> Element {
-    rsx! {
-        Link {
-            class: "p-2 rounded-full text-paper-secondary hover:text-paper-accent transition-colors duration-200",
-            to: Route::Search {},
-            aria_label: "搜索",
-            title: "搜索",
-            svg {
-                xmlns: "http://www.w3.org/2000/svg",
-                height: "24px",
-                view_box: "0 -960 960 960",
-                width: "24px",
-                fill: "currentColor",
-                path {
-                    d: "M784-120 532-372q-30 24-69 38t-83 14q-109 0-184.5-75.5T120-580q0-109 75.5-184.5T380-840q109 0 184.5 75.5T640-580q0 44-14 83t-38 69l252 252-56 56ZM380-400q75 0 127.5-52.5T560-580q0-75-52.5-127.5T380-760q-75 0-127.5 52.5T200-580q0 75 52.5 127.5T380-400Z",
-                }
-            }
-        }
-    }
-}
--- a/src/components/nav.rs
+++ b/src/components/nav.rs
@ -10,8 +10,7 @@ use crate::router::Route;
 /// 参数：
 /// - `route`：当前路由
 ///
-/// 返回：包含首页、归档、标签、关于的导航配置数组。
-/// 搜索以图标形式置于 Header 右侧（主题切换左边），不在此文本导航中。
+/// 返回：包含首页、归档、标签、搜索、关于的导航配置数组。
 pub fn use_nav_items(route: Route) -> Vec<NavItemConfig> {
    vec![
        NavItemConfig {
@ -29,6 +28,11 @@ pub fn use_nav_items(route: Route) -> Vec<NavItemConfig> {
            label: "标签",
            is_active: matches!(route, Route::Tags {}) || matches!(route, Route::TagDetail { .. }),
        },
+        NavItemConfig {
+            route: Route::Search {},
+            label: "搜索",
+            is_active: matches!(route, Route::Search {}),
+        },
        NavItemConfig {
            route: Route::About {},
            label: "关于",
				`@ -1 +0,0 @@`
				`<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#e3e3e3"><path d="M784-120 532-372q-30 24-69 38t-83 14q-109 0-184.5-75.5T120-580q0-109 75.5-184.5T380-840q109 0 184.5 75.5T640-580q0 44-14 83t-38 69l252 252-56 56ZM380-400q75 0 127.5-52.5T560-580q0-75-52.5-127.5T380-760q-75 0-127.5 52.5T200-580q0 75 52.5 127.5T380-400Z"/></svg>`