feat: add dark mode, mobile menu, method comparison, scroll-to-top

- Add theme toggle (light/dark/system) with localStorage persistence
- Implement responsive mobile hamburger menu
- Create ComparePage for side-by-side comparison of up to 3 methods
- Add ScrollToTop component for route changes
- Update navigation with compare page link

Co-authored-by: Cursor <cursoragent@cursor.com>

src/App.tsx

@@ -4,6 +4,7 @@ import { HomePage } from "@/pages/HomePage";
 import { MethodsPage } from "@/pages/MethodsPage";
 import { MethodDetailPage } from "@/pages/MethodDetailPage";
 import { BmiCalculatorPage } from "@/pages/BmiCalculatorPage";
+import { ComparePage } from "@/pages/ComparePage";
 
 export function App() {
   return (
@@ -13,6 +14,7 @@ export function App() {
         <Route path="methods" element={<MethodsPage />} />
         <Route path="methods/:slug" element={<MethodDetailPage />} />
         <Route path="calculator" element={<BmiCalculatorPage />} />
+        <Route path="compare" element={<ComparePage />} />
       </Route>
     </Routes>
   );

src/components/Header.tsx

@@ -1,26 +1,37 @@
+import { useState } from "react";
 import { Link, NavLink } from "react-router-dom";
 import { clsx } from "clsx";
+import { ThemeToggle } from "@/components/ThemeToggle";
 
 const navLinks = [
-  { to: "/", label: "Главная" },
-  { to: "/methods", label: "Методики" },
-  { to: "/calculator", label: "Калькулятор BMI" },
+  { to: "/", label: "Главная", exact: true },
+  { to: "/methods", label: "Методики", exact: false },
+  { to: "/compare", label: "Сравнение", exact: true },
+  { to: "/calculator", label: "Калькулятор BMI", exact: true },
 ] as const;
 
 export function Header() {
+  const [mobileOpen, setMobileOpen] = useState(false);
+
   return (
     <header className="sticky top-0 z-50 border-b border-gray-200 bg-white/80 backdrop-blur-lg dark:border-gray-800 dark:bg-gray-950/80">
       <div className="container mx-auto flex items-center justify-between px-4 py-4">
-        <Link to="/" className="flex items-center gap-2 text-xl font-bold text-primary-600">
+        <Link
+          to="/"
+          className="flex items-center gap-2 text-xl font-bold text-primary-600"
+          onClick={() => setMobileOpen(false)}
+        >
           <span aria-hidden="true" className="text-2xl">&#x1F33F;</span>
           HealthyWeight
         </Link>
 
+        {/* Desktop nav */}
         <nav className="hidden items-center gap-1 md:flex">
-          {navLinks.map(({ to, label }) => (
+          {navLinks.map(({ to, label, exact }) => (
             <NavLink
               key={to}
               to={to}
+              end={exact}
               className={({ isActive }) =>
                 clsx(
                   "rounded-lg px-4 py-2 text-sm font-medium transition-colors",
@@ -33,23 +44,54 @@ export function Header() {
               {label}
             </NavLink>
           ))}
+          <ThemeToggle />
         </nav>
 
-        <MobileMenuButton />
+        {/* Mobile controls */}
+        <div className="flex items-center gap-1 md:hidden">
+          <ThemeToggle />
+          <button
+            onClick={() => setMobileOpen((prev) => !prev)}
+            className="rounded-lg p-2 text-gray-600 hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800"
+            aria-label={mobileOpen ? "Закрыть меню" : "Открыть меню"}
+            aria-expanded={mobileOpen}
+          >
+            {mobileOpen ? (
+              <svg className="h-6 w-6" fill="none" viewBox="0 0 24 24" strokeWidth={1.5} stroke="currentColor">
+                <path strokeLinecap="round" strokeLinejoin="round" d="M6 18 18 6M6 6l12 12" />
+              </svg>
+            ) : (
+              <svg className="h-6 w-6" fill="none" viewBox="0 0 24 24" strokeWidth={1.5} stroke="currentColor">
+                <path strokeLinecap="round" strokeLinejoin="round" d="M3.75 6.75h16.5M3.75 12h16.5m-16.5 5.25h16.5" />
+              </svg>
+            )}
+          </button>
+        </div>
       </div>
+
+      {/* Mobile nav */}
+      {mobileOpen && (
+        <nav className="border-t border-gray-200 bg-white px-4 py-3 md:hidden dark:border-gray-800 dark:bg-gray-950">
+          {navLinks.map(({ to, label, exact }) => (
+            <NavLink
+              key={to}
+              to={to}
+              end={exact}
+              onClick={() => setMobileOpen(false)}
+              className={({ isActive }) =>
+                clsx(
+                  "block rounded-lg px-4 py-2.5 text-sm font-medium transition-colors",
+                  isActive
+                    ? "bg-primary-50 text-primary-700 dark:bg-primary-900/30 dark:text-primary-300"
+                    : "text-gray-600 hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800",
+                )
+              }
+            >
+              {label}
+            </NavLink>
+          ))}
+        </nav>
+      )}
     </header>
   );
 }
-
-function MobileMenuButton() {
-  return (
-    <button
-      className="rounded-lg p-2 text-gray-600 hover:bg-gray-100 md:hidden dark:text-gray-400 dark:hover:bg-gray-800"
-      aria-label="Открыть меню"
-    >
-      <svg className="h-6 w-6" fill="none" viewBox="0 0 24 24" strokeWidth={1.5} stroke="currentColor">
-        <path strokeLinecap="round" strokeLinejoin="round" d="M3.75 6.75h16.5M3.75 12h16.5m-16.5 5.25h16.5" />
-      </svg>
-    </button>
-  );
-}

src/components/Layout.tsx

@@ -1,10 +1,12 @@
 import { Outlet } from "react-router-dom";
 import { Header } from "@/components/Header";
 import { Footer } from "@/components/Footer";
+import { ScrollToTop } from "@/components/ScrollToTop";
 
 export function Layout() {
   return (
     <div className="flex min-h-screen flex-col">
+      <ScrollToTop />
       <Header />
       <main className="flex-1">
         <Outlet />

src/components/ScrollToTop.tsx

@@ -0,0 +1,12 @@
+import { useEffect } from "react";
+import { useLocation } from "react-router-dom";
+
+export function ScrollToTop() {
+  const { pathname } = useLocation();
+
+  useEffect(() => {
+    window.scrollTo(0, 0);
+  }, [pathname]);
+
+  return null;
+}

src/components/ThemeToggle.tsx

@@ -0,0 +1,40 @@
+import { useTheme } from "@/hooks/useTheme";
+
+const icons = {
+  light: (
+    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" strokeWidth={1.5} stroke="currentColor">
+      <path strokeLinecap="round" strokeLinejoin="round" d="M12 3v2.25m6.364.386-1.591 1.591M21 12h-2.25m-.386 6.364-1.591-1.591M12 18.75V21m-4.773-4.227-1.591 1.591M5.25 12H3m4.227-4.773L5.636 5.636M15.75 12a3.75 3.75 0 1 1-7.5 0 3.75 3.75 0 0 1 7.5 0Z" />
+    </svg>
+  ),
+  dark: (
+    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" strokeWidth={1.5} stroke="currentColor">
+      <path strokeLinecap="round" strokeLinejoin="round" d="M21.752 15.002A9.72 9.72 0 0 1 18 15.75c-5.385 0-9.75-4.365-9.75-9.75 0-1.33.266-2.597.748-3.752A9.753 9.753 0 0 0 3 11.25C3 16.635 7.365 21 12.75 21a9.753 9.753 0 0 0 9.002-5.998Z" />
+    </svg>
+  ),
+  system: (
+    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" strokeWidth={1.5} stroke="currentColor">
+      <path strokeLinecap="round" strokeLinejoin="round" d="M9 17.25v1.007a3 3 0 0 1-.879 2.122L7.5 21h9l-.621-.621A3 3 0 0 1 15 18.257V17.25m6-12V15a2.25 2.25 0 0 1-2.25 2.25H5.25A2.25 2.25 0 0 1 3 15V5.25m18 0A2.25 2.25 0 0 0 18.75 3H5.25A2.25 2.25 0 0 0 3 5.25m18 0V12a2.25 2.25 0 0 1-2.25 2.25H5.25A2.25 2.25 0 0 1 3 12V5.25" />
+    </svg>
+  ),
+} as const;
+
+const labels = {
+  light: "Светлая тема",
+  dark: "Тёмная тема",
+  system: "Системная тема",
+} as const;
+
+export function ThemeToggle() {
+  const { theme, toggleTheme } = useTheme();
+
+  return (
+    <button
+      onClick={toggleTheme}
+      className="rounded-lg p-2 text-gray-600 transition-colors hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800"
+      aria-label={labels[theme]}
+      title={labels[theme]}
+    >
+      {icons[theme]}
+    </button>
+  );
+}

src/hooks/useTheme.ts

@@ -0,0 +1,38 @@
+import { useCallback, useEffect } from "react";
+import { useLocalStorage } from "@/hooks/useLocalStorage";
+
+type Theme = "light" | "dark" | "system";
+
+function getSystemTheme(): "light" | "dark" {
+  return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
+}
+
+function applyTheme(theme: Theme) {
+  const resolved = theme === "system" ? getSystemTheme() : theme;
+  document.documentElement.classList.toggle("dark", resolved === "dark");
+}
+
+export function useTheme() {
+  const [theme, setTheme] = useLocalStorage<Theme>("theme", "system");
+
+  useEffect(() => {
+    applyTheme(theme);
+
+    if (theme === "system") {
+      const mq = window.matchMedia("(prefers-color-scheme: dark)");
+      const handler = () => applyTheme("system");
+      mq.addEventListener("change", handler);
+      return () => mq.removeEventListener("change", handler);
+    }
+  }, [theme]);
+
+  const toggleTheme = useCallback(() => {
+    setTheme((prev) => {
+      if (prev === "light") return "dark";
+      if (prev === "dark") return "system";
+      return "light";
+    });
+  }, [setTheme]);
+
+  return { theme, setTheme, toggleTheme };
+}

src/pages/ComparePage.tsx

@@ -0,0 +1,142 @@
+import { useState, useMemo } from "react";
+import { Link } from "react-router-dom";
+import { clsx } from "clsx";
+import { methods } from "@/data/methods";
+import { CATEGORIES, DIFFICULTIES, EFFECTIVENESS_LEVELS } from "@/types/method";
+import type { DietMethod } from "@/types/method";
+
+const MAX_COMPARE = 3;
+
+export function ComparePage() {
+  const [selectedIds, setSelectedIds] = useState<string[]>([]);
+
+  const selectedMethods = useMemo(
+    () => selectedIds.map((id) => methods.find((m) => m.id === id)).filter(Boolean) as DietMethod[],
+    [selectedIds],
+  );
+
+  const toggleMethod = (id: string) => {
+    setSelectedIds((prev) => {
+      if (prev.includes(id)) return prev.filter((i) => i !== id);
+      if (prev.length >= MAX_COMPARE) return prev;
+      return [...prev, id];
+    });
+  };
+
+  return (
+    <div className="container mx-auto px-4 py-8">
+      <h1 className="text-3xl font-bold text-gray-900 dark:text-white">Сравнение методик</h1>
+      <p className="mt-2 text-gray-500 dark:text-gray-400">
+        Выберите до {MAX_COMPARE} методик для сравнения
+      </p>
+
+      {/* Selector */}
+      <div className="mt-6 flex flex-wrap gap-2">
+        {methods.map((m) => {
+          const selected = selectedIds.includes(m.id);
+          const disabled = !selected && selectedIds.length >= MAX_COMPARE;
+          return (
+            <button
+              key={m.id}
+              onClick={() => toggleMethod(m.id)}
+              disabled={disabled}
+              className={clsx(
+                "rounded-lg px-3 py-1.5 text-xs font-medium transition-colors",
+                selected
+                  ? "bg-primary-600 text-white"
+                  : disabled
+                    ? "cursor-not-allowed bg-gray-100 text-gray-400 dark:bg-gray-800 dark:text-gray-600"
+                    : "bg-gray-100 text-gray-700 hover:bg-primary-100 hover:text-primary-700 dark:bg-gray-800 dark:text-gray-300 dark:hover:bg-primary-900/30",
+              )}
+            >
+              {CATEGORIES[m.category].icon} {m.title}
+            </button>
+          );
+        })}
+      </div>
+
+      {/* Comparison table */}
+      {selectedMethods.length >= 2 && (
+        <div className="mt-8 overflow-x-auto">
+          <table className="w-full border-collapse text-sm">
+            <thead>
+              <tr>
+                <th className="border-b border-gray-200 px-4 py-3 text-left text-xs font-semibold text-gray-500 uppercase dark:border-gray-700 dark:text-gray-400">
+                  Параметр
+                </th>
+                {selectedMethods.map((m) => (
+                  <th
+                    key={m.id}
+                    className="border-b border-gray-200 px-4 py-3 text-left text-xs font-semibold text-gray-900 uppercase dark:border-gray-700 dark:text-white"
+                  >
+                    <Link to={`/methods/${m.slug}`} className="hover:text-primary-600">
+                      {m.title}
+                    </Link>
+                  </th>
+                ))}
+              </tr>
+            </thead>
+            <tbody>
+              <CompareRow label="Категория" items={selectedMethods.map((m) => `${CATEGORIES[m.category].icon} ${CATEGORIES[m.category].label}`)} />
+              <CompareRow label="Сложность" items={selectedMethods.map((m) => DIFFICULTIES[m.difficulty].label)} />
+              <CompareRow label="Эффективность" items={selectedMethods.map((m) => EFFECTIVENESS_LEVELS[m.effectiveness].label)} />
+              <CompareRow label="Сроки" items={selectedMethods.map((m) => m.timeframe)} />
+              <CompareRow
+                label="Преимущества"
+                items={selectedMethods.map((m) => (
+                  <ul className="list-inside list-disc space-y-1">
+                    {m.pros.map((p) => <li key={p}>{p}</li>)}
+                  </ul>
+                ))}
+              />
+              <CompareRow
+                label="Недостатки"
+                items={selectedMethods.map((m) => (
+                  <ul className="list-inside list-disc space-y-1">
+                    {m.cons.map((c) => <li key={c}>{c}</li>)}
+                  </ul>
+                ))}
+              />
+              <CompareRow label="Научное обоснование" items={selectedMethods.map((m) => m.scientificBasis)} />
+              <CompareRow
+                label="Противопоказания"
+                items={selectedMethods.map((m) =>
+                  m.contraindications.length > 0
+                    ? m.contraindications.join(", ")
+                    : "Нет",
+                )}
+              />
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      {selectedMethods.length < 2 && selectedMethods.length > 0 && (
+        <div className="mt-8 rounded-xl border-2 border-dashed border-gray-300 py-12 text-center text-gray-500 dark:border-gray-700 dark:text-gray-400">
+          Выберите ещё {2 - selectedMethods.length} методик{selectedMethods.length === 1 ? "у" : "и"} для сравнения
+        </div>
+      )}
+
+      {selectedMethods.length === 0 && (
+        <div className="mt-8 rounded-xl border-2 border-dashed border-gray-300 py-12 text-center text-gray-500 dark:border-gray-700 dark:text-gray-400">
+          Выберите методики из списка выше
+        </div>
+      )}
+    </div>
+  );
+}
+
+function CompareRow({ label, items }: { label: string; items: React.ReactNode[] }) {
+  return (
+    <tr className="border-b border-gray-100 dark:border-gray-800">
+      <td className="px-4 py-3 font-medium text-gray-600 align-top dark:text-gray-400">
+        {label}
+      </td>
+      {items.map((item, i) => (
+        <td key={i} className="px-4 py-3 text-gray-700 align-top dark:text-gray-300">
+          {item}
+        </td>
+      ))}
+    </tr>
+  );
+}

tsconfig.app.tsbuildinfo

@@ -1 +1 @@
-{"root":["./src/app.tsx","./src/main.tsx","./src/vite-env.d.ts","./src/components/badge.tsx","./src/components/bookmarkbutton.tsx","./src/components/difficultybadge.tsx","./src/components/effectivenessindicator.tsx","./src/components/filterpanel.tsx","./src/components/footer.tsx","./src/components/header.tsx","./src/components/layout.tsx","./src/components/methodcard.tsx","./src/components/searchbar.tsx","./src/data/methods.ts","./src/hooks/usebookmarks.ts","./src/hooks/uselocalstorage.ts","./src/pages/bmicalculatorpage.tsx","./src/pages/homepage.tsx","./src/pages/methoddetailpage.tsx","./src/pages/methodspage.tsx","./src/types/method.ts","./src/utils/bmi.ts"],"version":"5.9.3"}
+{"root":["./src/app.tsx","./src/main.tsx","./src/vite-env.d.ts","./src/components/badge.tsx","./src/components/bookmarkbutton.tsx","./src/components/difficultybadge.tsx","./src/components/effectivenessindicator.tsx","./src/components/filterpanel.tsx","./src/components/footer.tsx","./src/components/header.tsx","./src/components/layout.tsx","./src/components/methodcard.tsx","./src/components/scrolltotop.tsx","./src/components/searchbar.tsx","./src/components/themetoggle.tsx","./src/data/methods.ts","./src/hooks/usebookmarks.ts","./src/hooks/uselocalstorage.ts","./src/hooks/usetheme.ts","./src/pages/bmicalculatorpage.tsx","./src/pages/comparepage.tsx","./src/pages/homepage.tsx","./src/pages/methoddetailpage.tsx","./src/pages/methodspage.tsx","./src/types/method.ts","./src/utils/bmi.ts"],"version":"5.9.3"}