feat: use material ui

README.md

@@ -19,17 +19,17 @@ traveling-around-the-world/
 
 ### 技術與工具
 - Vite + React 18 + TypeScript
+- Material UI + Emotion 建構一致的 UI 與主題
 - React Router 規劃 SPA 路由
 - Zustand 追蹤 UI 狀態（訪問表單 Modal 與初始座標）
 - React Query 統一處理資料讀寫與快取
 - React Hook Form + Zod 表單驗證
 - react-leaflet + OpenStreetMap 圖資，支援地圖點擊新增足跡
-- Tailwind CSS (JIT) 打造快速 UI
 
 ### 模組切分
 - `features/map`：Leaflet 地圖、點擊事件、旅遊標記
 - `features/visits`：資料型別、LocalStorage Repository、React Query hooks、統計卡片與表單元件
-- `components/layout`：頁面主框架、側邊欄
+- `components/layout`：MUI AppBar + Drawer 布局、語言切換等元件
 - `state`：Zustand store 控制訪問建立/編輯的 Modal
 - `components/overlay/VisitModal`：以 Modal 呈現足跡表單，地圖右下角的 `+` 漂浮按鈕或點擊地圖即可開啟
 

client/package-lock.json

@@ -8,7 +8,11 @@
       "name": "traveling-around-the-world-client",
       "version": "0.1.0",
       "dependencies": {
+        "@emotion/react": "^11.11.3",
+        "@emotion/styled": "^11.11.0",
         "@hookform/resolvers": "^3.3.4",
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+        "@mui/material": "^5.15.14",
         "@tanstack/react-query": "^5.29.0",
         "i18next": "^23.11.5",
         "leaflet": "^1.9.4",
@@ -54,6 +58,84 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
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     },
+    "node_modules/jsesc": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-3.1.0.tgz",
+      "integrity": "sha512-/sM3dO2FOzXjKQhJuo0Q173wf2KOo8t4I8vHy6lF9poUp7bKT0/NHE8fPX23PwfhnykfqnC2xRxOnVw5XuGIaA==",
+      "bin": {
+        "jsesc": "bin/jsesc"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/json-buffer": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/json-buffer/-/json-buffer-3.0.1.tgz",
       "integrity": "sha512-4bV5BfR2mqfQTJm+V5tPPdf+ZpuhiIvTuAB5g8kcrXOZpTT/QwwVRWBywX1ozr6lEuPdbHxwaJlm9G6mI2sfSQ==",
       "dev": true
     },
+    "node_modules/json-parse-even-better-errors": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/json-parse-even-better-errors/-/json-parse-even-better-errors-2.3.1.tgz",
+      "integrity": "sha512-xyFwyhro/JEof6Ghe2iz2NcXoj2sloNsWr/XsERDK/oiPCfaNhl5ONfp+jQdAZRQQ0IJWNzH9zIZF7li91kh2w=="
+    },
     "node_modules/json-schema-traverse": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
@@ -3906,8 +4518,7 @@
     "node_modules/lines-and-columns": {
       "version": "1.2.4",
       "resolved": "https://registry.npmjs.org/lines-and-columns/-/lines-and-columns-1.2.4.tgz",
-      "integrity": "sha512-7ylylesZQ/PV29jhEDl3Ufjo6ZX7gCqJr5F7PKrqc93v7fzSymt1BpwEU8nAUXs8qzzvqhbjhK5QZg6Mt/HkBg==",
+      "integrity": "sha512-7ylylesZQ/PV29jhEDl3Ufjo6ZX7gCqJr5F7PKrqc93v7fzSymt1BpwEU8nAUXs8qzzvqhbjhK5QZg6Mt/HkBg=="
-      "dev": true
     },
     "node_modules/locate-path": {
       "version": "6.0.0",
@@ -4005,8 +4616,7 @@
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
-      "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
+      "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
-      "dev": true
     },
     "node_modules/mz": {
       "version": "2.7.0",
@@ -4070,7 +4680,6 @@
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
       "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==",
-      "dev": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -4259,7 +4868,6 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/parent-module/-/parent-module-1.0.1.tgz",
       "integrity": "sha512-GQ2EWRpQV8/o+Aw8YqtfZZPfNRWZYkbidE9k5rpl/hC3vtHHBfGm2Ifi6qWV+coDGkrUKZAxE3Lot5kcsRlh+g==",
-      "dev": true,
       "dependencies": {
         "callsites": "^3.0.0"
       },
@@ -4267,6 +4875,23 @@
         "node": ">=6"
       }
     },
+    "node_modules/parse-json": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-5.2.0.tgz",
+      "integrity": "sha512-ayCKvm/phCGxOkYRSCM82iDwct8/EonSEgCSxWxD7ve6jHggsFl4fZVQBPRNgQoKiuV/odhFrGzQXZwbifC8Rg==",
+      "dependencies": {
+        "@babel/code-frame": "^7.0.0",
+        "error-ex": "^1.3.1",
+        "json-parse-even-better-errors": "^2.3.0",
+        "lines-and-columns": "^1.1.6"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/path-exists": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
@@ -4297,8 +4922,7 @@
     "node_modules/path-parse": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.7.tgz",
-      "integrity": "sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==",
+      "integrity": "sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw=="
-      "dev": true
     },
     "node_modules/path-scurry": {
       "version": "1.11.1",
@@ -4320,7 +4944,6 @@
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/path-type/-/path-type-4.0.0.tgz",
       "integrity": "sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==",
-      "dev": true,
       "engines": {
         "node": ">=8"
       }
@@ -4328,8 +4951,7 @@
     "node_modules/picocolors": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
-      "integrity": "sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==",
+      "integrity": "sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA=="
-      "dev": true
     },
     "node_modules/picomatch": {
       "version": "2.3.1",
@@ -4585,7 +5207,6 @@
       "version": "15.8.1",
       "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.8.1.tgz",
       "integrity": "sha512-oj87CgZICdulUohogVAR7AjlC0327U4el4L6eAvOqCeudMDVU0NThNaV+b9Df4dXgSP1gXMTnPdhfe/2qDH5cg==",
-      "dev": true,
       "dependencies": {
         "loose-envify": "^1.4.0",
         "object-assign": "^4.1.1",
@@ -4683,8 +5304,7 @@
     "node_modules/react-is": {
       "version": "16.13.1",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz",
-      "integrity": "sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==",
+      "integrity": "sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ=="
-      "dev": true
     },
     "node_modules/react-leaflet": {
       "version": "4.2.1",
@@ -4729,6 +5349,21 @@
         "react-dom": ">=16.8"
       }
     },
+    "node_modules/react-transition-group": {
+      "version": "4.4.5",
+      "resolved": "https://registry.npmjs.org/react-transition-group/-/react-transition-group-4.4.5.tgz",
+      "integrity": "sha512-pZcd1MCJoiKiBR2NRxeCRg13uCXbydPnmB4EOeRrY7480qNWO8IIgQG6zlDkm6uRMsURXPuKq0GWtiM59a5Q6g==",
+      "dependencies": {
+        "@babel/runtime": "^7.5.5",
+        "dom-helpers": "^5.0.1",
+        "loose-envify": "^1.4.0",
+        "prop-types": "^15.6.2"
+      },
+      "peerDependencies": {
+        "react": ">=16.6.0",
+        "react-dom": ">=16.6.0"
+      }
+    },
     "node_modules/read-cache": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/read-cache/-/read-cache-1.0.0.tgz",
@@ -4813,7 +5448,6 @@
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
       "integrity": "sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==",
-      "dev": true,
       "engines": {
         "node": ">=4"
       }
@@ -5140,6 +5774,14 @@
         "node": ">=8"
       }
     },
+    "node_modules/source-map": {
+      "version": "0.5.7",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+      "integrity": "sha512-LbrmJOMUSdEVxIKvdcJzQC+nQhe8FUZQTXQy6+I75skNgn3OoQ0DZA8YnFa7gp8tqtL3KPf1kmo0R5DoApeSGQ==",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/source-map-js": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
@@ -5357,6 +5999,11 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/stylis": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/stylis/-/stylis-4.2.0.tgz",
+      "integrity": "sha512-Orov6g6BB1sDfYgzWfTHDOxamtX1bE/zo104Dh9e6fqJ3PooipYyfJ0pUmrZO2wAvO8YbEyeFrkV91XTsGMSrw=="
+    },
     "node_modules/sucrase": {
       "version": "3.35.0",
       "resolved": "https://registry.npmjs.org/sucrase/-/sucrase-3.35.0.tgz",
@@ -5430,7 +6077,6 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz",
       "integrity": "sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==",
-      "dev": true,
       "engines": {
         "node": ">= 0.4"
       },

client/package.json

@@ -22,7 +22,11 @@
     "nanoid": "^5.0.7",
     "@hookform/resolvers": "^3.3.4",
     "i18next": "^23.11.5",
-    "react-i18next": "^14.1.1"
+    "react-i18next": "^14.1.1",
+    "@mui/material": "^5.15.14",
+    "@mui/icons-material": "^5.15.14",
+    "@emotion/react": "^11.11.3",
+    "@emotion/styled": "^11.11.0"
   },
   "devDependencies": {
     "@types/leaflet": "^1.9.12",

client/src/app/App.tsx

@@ -1,11 +1,13 @@
 import { BrowserRouter, Route, Routes } from 'react-router-dom';
 import { VisitProvider } from '../features/visits/context/VisitProvider';
 import { useCallback, useState } from 'react';
+import { ThemeProvider, CssBaseline } from '@mui/material';
 import { PrimaryLayout } from '../components/layout/PrimaryLayout';
 import { VisitSidebar } from '../components/layout/VisitSidebar';
 import { TravelMap } from '../features/map/TravelMap';
 import { VisitModal } from '../components/overlay/VisitModal';
 import { useVisitModalStore } from '../state/useVisitModalStore';
+import { appTheme } from '../styles/theme';
 
 function HomePage() {
   const openForCreate = useVisitModalStore((state) => state.openForCreate);
@@ -32,13 +34,16 @@ function HomePage() {
 
 export function App() {
   return (
-    <VisitProvider mode="local">
+    <ThemeProvider theme={appTheme}>
-      <BrowserRouter>
+      <CssBaseline />
-        <Routes>
+      <VisitProvider mode="local">
-          <Route path="/" element={<HomePage />} />
+        <BrowserRouter>
-        </Routes>
+          <Routes>
-      </BrowserRouter>
+            <Route path="/" element={<HomePage />} />
-      <VisitModal />
+          </Routes>
-    </VisitProvider>
+        </BrowserRouter>
+        <VisitModal />
+      </VisitProvider>
+    </ThemeProvider>
   );
 }

client/src/components/layout/LanguageSwitcher.tsx

@@ -1,4 +1,5 @@
 import { useTranslation } from 'react-i18next';
+import { FormControl, InputLabel, MenuItem, Select } from '@mui/material';
 import { SUPPORTED_LANGUAGES, type SupportedLanguage } from '../../i18n';
 
 const LABEL_LOOKUP: Record<SupportedLanguage, string> = {
@@ -13,22 +14,24 @@ export function LanguageSwitcher() {
     SUPPORTED_LANGUAGES.find((language) => i18n.language.startsWith(language)) ?? 'zh-Hant';
 
   return (
-    <label className="flex items-center gap-2 text-sm text-slate-500">
+    <FormControl size="small">
-      <span>{t('language.label')}</span>
+      <InputLabel id="language-switcher-label">{t('language.label')}</InputLabel>
-      <select
+      <Select
-        className="rounded border border-slate-300 bg-white px-2 py-1 text-sm"
+        labelId="language-switcher-label"
+        label={t('language.label')}
         value={currentLanguage}
         onChange={(event) => {
           const selected = event.target.value as SupportedLanguage;
           void i18n.changeLanguage(selected);
         }}
+        sx={{ minWidth: 140 }}
       >
         {SUPPORTED_LANGUAGES.map((language) => (
-          <option key={language} value={language}>
+          <MenuItem key={language} value={language}>
             {t(LABEL_LOOKUP[language])}
-          </option>
+          </MenuItem>
         ))}
-      </select>
+      </Select>
-    </label>
+    </FormControl>
   );
 }

client/src/components/layout/PrimaryLayout.tsx

@@ -1,5 +1,20 @@
 import { useEffect, useState, type ReactNode } from 'react';
 import { useTranslation } from 'react-i18next';
+import {
+  AppBar,
+  Box,
+  Divider,
+  Drawer,
+  IconButton,
+  Link,
+  Stack,
+  Toolbar,
+  Typography,
+  useMediaQuery
+} from '@mui/material';
+import MenuIcon from '@mui/icons-material/Menu';
+import ChevronLeftIcon from '@mui/icons-material/ChevronLeft';
+import { useTheme } from '@mui/material/styles';
 import { LanguageSwitcher } from './LanguageSwitcher';
 
 interface PrimaryLayoutProps {
@@ -8,61 +23,99 @@ interface PrimaryLayoutProps {
   onSidebarToggle?: (isOpen: boolean) => void;
 }
 
+const SIDEBAR_WIDTH = 320;
+
 export function PrimaryLayout({ sidebar, content, onSidebarToggle }: PrimaryLayoutProps) {
   const { t } = useTranslation();
-  const [isSidebarOpen, setIsSidebarOpen] = useState(true);
+  const theme = useTheme();
+  const isDesktop = useMediaQuery(theme.breakpoints.up('lg'));
+  const [isSidebarOpen, setIsSidebarOpen] = useState(isDesktop);
+
+  useEffect(() => {
+    setIsSidebarOpen(isDesktop);
+  }, [isDesktop]);
 
   useEffect(() => {
     onSidebarToggle?.(isSidebarOpen);
   }, [isSidebarOpen, onSidebarToggle]);
 
+  const toggleSidebar = () => setIsSidebarOpen((prev) => !prev);
+
+  const toolbarOffset = { xs: '56px', sm: '64px' } as const;
+
   return (
-    <div className="flex h-screen flex-col">
+    <Box sx={{ display: 'flex', minHeight: '100vh', flexDirection: 'column', bgcolor: 'background.default' }}>
-      <header className="border-b border-slate-200 bg-white">
+      <AppBar position="fixed" color="transparent" elevation={0} sx={{ borderBottom: 1, borderColor: 'divider' }}>
-        <div className="mx-auto flex max-w-6xl items-center justify-between px-6 py-4">
+        <Toolbar sx={{ maxWidth: 1200, mx: 'auto', width: '100%' }}>
-          <div className="flex items-center gap-3">
+          <Stack direction="row" alignItems="center" spacing={2} sx={{ flexGrow: 1 }}>
-            <button
+            <IconButton
-              type="button"
+              size="large"
+              edge="start"
+              color="primary"
               aria-label={t(isSidebarOpen ? 'sidebar.toggleClose' : 'sidebar.toggleOpen')}
-              aria-controls="visit-sidebar"
+              onClick={toggleSidebar}
-              aria-expanded={isSidebarOpen}
+              sx={{ mr: 1 }}
-              className="rounded bg-slate-100 p-2 text-slate-600 transition hover:bg-slate-200 focus:outline-none focus:ring-2 focus:ring-primary"
-              onClick={() => setIsSidebarOpen((prev) => !prev)}
             >
-              <span className="block text-xl leading-none">{isSidebarOpen ? '⟨' : '☰'}</span>
+              {isSidebarOpen ? <ChevronLeftIcon /> : <MenuIcon />}
-            </button>
+            </IconButton>
-            <div>
+            <Box>
-              <h1 className="text-2xl font-bold">{t('common.appName')}</h1>
+              <Typography variant="h5" fontWeight={700} color="text.primary">
-              <p className="text-sm text-slate-500">{t('common.tagline')}</p>
+                {t('common.appName')}
-            </div>
+              </Typography>
-          </div>
+              <Typography variant="body2" color="text.secondary">
-          <div className="flex items-center gap-4">
+                {t('common.tagline')}
-            <nav className="flex items-center gap-3 text-sm text-slate-500">
+              </Typography>
-              <a href="https://www.openstreetmap.org/" target="_blank" rel="noreferrer" className="hover:text-primary">
+            </Box>
+          </Stack>
+          <Stack direction="row" spacing={2} alignItems="center">
+            <Stack direction="row" spacing={2} sx={{ display: { xs: 'none', sm: 'flex' } }}>
+              <Link href="https://www.openstreetmap.org/" target="_blank" rel="noreferrer" underline="hover" color="text.secondary">
                 {t('nav.openStreetMap')}
-              </a>
+              </Link>
-              <a href="https://react-leaflet.js.org/" target="_blank" rel="noreferrer" className="hover:text-primary">
+              <Link href="https://react-leaflet.js.org/" target="_blank" rel="noreferrer" underline="hover" color="text.secondary">
                 {t('nav.reactLeaflet')}
-              </a>
+              </Link>
-            </nav>
+            </Stack>
             <LanguageSwitcher />
-          </div>
+          </Stack>
-        </div>
+        </Toolbar>
-      </header>
+      </AppBar>
-      <main className="flex flex-1 overflow-hidden">
+
-        <aside
+      <Box sx={{ display: 'flex', flexGrow: 1, minHeight: 0, pt: toolbarOffset }}>
-          id="visit-sidebar"
+        <Drawer
-          aria-hidden={!isSidebarOpen}
+          variant={isDesktop ? 'persistent' : 'temporary'}
-          className={`flex-shrink-0 min-w-0 overflow-hidden transition-[flex-basis,max-width] duration-300 ease-in-out ${
+          anchor="left"
-            isSidebarOpen
+          open={isSidebarOpen}
-              ? 'basis-[25%] max-w-[25%] border-r border-slate-200'
+          onClose={toggleSidebar}
-              : 'pointer-events-none basis-0 max-w-0'
+          ModalProps={{ keepMounted: true }}
-          }`}
+          sx={{
+            width: { lg: SIDEBAR_WIDTH },
+            flexShrink: 0,
+            '& .MuiDrawer-paper': {
+              width: { xs: 280, sm: SIDEBAR_WIDTH },
+              boxSizing: 'border-box',
+              borderRight: 1,
+              borderColor: 'divider',
+              bgcolor: 'background.default',
+              top: toolbarOffset,
+              height: {
+                xs: `calc(100% - ${toolbarOffset.xs})`,
+                sm: `calc(100% - ${toolbarOffset.sm})`
+              }
+            }
+          }}
         >
-          {isSidebarOpen ? <div className="h-full">{sidebar}</div> : null}
+          <Box sx={{ p: 2, height: '100%', overflowY: 'auto' }}>
-        </aside>
+            {sidebar}
-        <section className="flex-1">{content}</section>
+          </Box>
-      </main>
+        </Drawer>
-    </div>
+
+        {isDesktop && (
+          <Divider orientation="vertical" flexItem sx={{ display: isSidebarOpen ? 'block' : 'none' }} />
+        )}
+
+        <Box component="main" sx={{ flexGrow: 1, minHeight: 0 }}>{content}</Box>
+      </Box>
+    </Box>
   );
 }

client/src/components/layout/VisitSidebar.tsx

@@ -1,4 +1,6 @@
 import { useTranslation } from 'react-i18next';
+import { Button, Card, CardContent, Stack, Typography } from '@mui/material';
+import AddIcon from '@mui/icons-material/Add';
 import { VisitList } from '../../features/visits/components/VisitList';
 import { VisitSummary } from '../../features/visits/components/VisitSummary';
 import { useVisitModalStore } from '../../state/useVisitModalStore';
@@ -9,26 +11,33 @@ export function VisitSidebar() {
   const openForEdit = useVisitModalStore((state) => state.openForEdit);
 
   return (
-    <aside className="flex h-full w-full flex-col gap-4 overflow-y-auto bg-slate-50 p-4">
+    <Stack spacing={3} sx={{ height: '100%' }}>
-      <header className="flex items-center justify-between">
+      <Stack direction="row" justifyContent="space-between" alignItems="center">
         <div>
-          <h2 className="text-xl font-semibold">{t('sidebar.title')}</h2>
+          <Typography variant="h6" fontWeight={600} color="text.primary">
-          <p className="text-sm text-slate-500">{t('sidebar.subtitle')}</p>
+            {t('sidebar.title')}
+          </Typography>
+          <Typography variant="body2" color="text.secondary">
+            {t('sidebar.subtitle')}
+          </Typography>
         </div>
-        <button
+        <Button
-          type="button"
+          variant="contained"
-          className="rounded bg-primary px-3 py-1.5 text-sm font-semibold text-white hover:bg-primary/90"
+          startIcon={<AddIcon />}
           onClick={() => openForCreate()}
+          sx={{ whiteSpace: 'nowrap' }}
         >
           {t('sidebar.add')}
-        </button>
+        </Button>
-      </header>
+      </Stack>
 
       <VisitSummary />
 
-      <section className="flex-1">
+      <Card sx={{ flex: 1, overflow: 'hidden', display: 'flex' }}>
-        <VisitList onEdit={openForEdit} />
+        <CardContent sx={{ flex: 1, overflowY: 'auto', p: 0 }}>
-      </section>
+          <VisitList onEdit={openForEdit} />
-    </aside>
+        </CardContent>
+      </Card>
+    </Stack>
   );
 }

client/src/components/overlay/VisitModal.tsx

@@ -1,4 +1,12 @@
 import { useTranslation } from 'react-i18next';
+import {
+  Dialog,
+  DialogContent,
+  DialogTitle,
+  IconButton,
+  Typography
+} from '@mui/material';
+import CloseIcon from '@mui/icons-material/Close';
 import { useVisitModalStore } from '../../state/useVisitModalStore';
 import { VisitForm } from '../../features/visits/components/VisitForm';
 
@@ -6,29 +14,24 @@ export function VisitModal() {
   const { isOpen, close, editingVisit, initialLocation } = useVisitModalStore();
   const { t } = useTranslation();
 
-  if (!isOpen) return null;
-
   return (
-    <div className="fixed inset-0 z-50 flex items-center justify-center bg-slate-900/60 px-4 py-10">
+    <Dialog open={isOpen} onClose={close} maxWidth="sm" fullWidth>
-      <div className="relative w-full max-w-lg rounded-2xl bg-white p-6 shadow-2xl">
+      <DialogTitle sx={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
-        <header className="mb-4 flex items-start justify-between">
+        <div>
-          <div>
+          <Typography variant="h6" component="span">
-            <h2 className="text-xl font-semibold">
+            {editingVisit ? t('sidebar.drawerTitleEdit') : t('sidebar.drawerTitleCreate')}
-              {editingVisit ? t('sidebar.drawerTitleEdit') : t('sidebar.drawerTitleCreate')}
+          </Typography>
-            </h2>
+          <Typography variant="body2" color="text.secondary" display="block">
-            <p className="text-sm text-slate-500">{t('sidebar.subtitle')}</p>
+            {t('sidebar.subtitle')}
-          </div>
+          </Typography>
-          <button
+        </div>
-            type="button"
+        <IconButton aria-label={t('sidebar.close')} onClick={close} edge="end">
-            aria-label={t('sidebar.close')}
+          <CloseIcon />
-            className="rounded bg-slate-100 px-2 py-1 text-sm text-slate-500 hover:bg-slate-200"
+        </IconButton>
-            onClick={close}
+      </DialogTitle>
-          >
+      <DialogContent dividers>
-            X
-          </button>
-        </header>
         <VisitForm editingVisit={editingVisit} initialLocation={initialLocation} onCompleted={close} onCancel={close} />
-      </div>
+      </DialogContent>
-    </div>
+    </Dialog>
   );
 }

client/src/features/map/TravelMap.tsx

@@ -8,6 +8,8 @@ import { useVisitsQuery } from '../visits/hooks/useVisitQueries';
 import { useTranslation } from 'react-i18next';
 import { useResizeMap } from '../visits/hooks/useResizeMap';
 import type { Map as LeafletMap } from 'leaflet';
+import { Box, Fab, Tooltip } from '@mui/material';
+import AddIcon from '@mui/icons-material/Add';
 
 const INITIAL_POSITION: [number, number] = [20, 0];
 const INITIAL_ZOOM = 2;
@@ -43,7 +45,7 @@ export function TravelMap({ onTriggerCreate, sidebarOpen = true }: TravelMapProp
   useResizeMap(mapRef, [sidebarOpen]);
 
   return (
-    <div className="relative h-full w-full">
+    <Box sx={{ position: 'relative', height: '100%', width: '100%' }}>
       <MapContainer
         whenCreated={(mapInstance) => {
           mapRef.current = mapInstance;
@@ -74,14 +76,15 @@ export function TravelMap({ onTriggerCreate, sidebarOpen = true }: TravelMapProp
           </Marker>
         ))}
       </MapContainer>
-      <button
+      <Tooltip title={t('sidebar.add')} placement="left">
-        type="button"
+        <Fab
-        aria-label={t('sidebar.add')}
+          color="primary"
-        className="absolute bottom-5 right-5 z-10 flex h-12 w-12 items-center justify-center rounded-full bg-primary text-2xl font-bold text-white shadow-lg transition hover:bg-primary/90"
+          sx={{ position: 'absolute', bottom: 24, right: 24, zIndex: 1000 }}
-        onClick={() => (onTriggerCreate ? onTriggerCreate() : openForCreate())}
+          onClick={() => (onTriggerCreate ? onTriggerCreate() : openForCreate())}
-      >
+        >
-        +
+          <AddIcon />
-      </button>
+        </Fab>
-    </div>
+      </Tooltip>
+    </Box>
   );
 }

client/src/features/visits/components/VisitForm.tsx

@@ -2,6 +2,15 @@ import { useEffect, useState } from 'react';
 import { useForm } from 'react-hook-form';
 import { z } from 'zod';
 import { zodResolver } from '@hookform/resolvers/zod';
+import {
+  Alert,
+  Box,
+  Button,
+  Grid,
+  Stack,
+  TextField,
+  Typography
+} from '@mui/material';
 import type { Visit, VisitCreateInput } from '../types';
 import { useCreateVisitMutation, useUpdateVisitMutation } from '../hooks/useVisitQueries';
 import { useTranslation } from 'react-i18next';
@@ -171,114 +180,107 @@ export function VisitForm({ editingVisit, onCompleted, onCancel, initialLocation
   }
 
   return (
-    <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
+    <Box component="form" onSubmit={handleSubmit(onSubmit)} noValidate>
-      <div className="grid gap-2">
+      <Stack spacing={3}>
-        <label className="text-sm font-medium" htmlFor="country">
+        <TextField
-          {t('form.country')}
+          label={t('form.country')}
-        </label>
-        <input
-          id="country"
-          className="rounded border border-slate-300 px-3 py-2"
           placeholder={t('form.countryPlaceholder')}
           {...register('country')}
+          error={Boolean(errors.country)}
+          helperText={errors.country ? t(errors.country.message ?? '') : ''}
+          fullWidth
         />
-        {errors.country ? (
-          <p className="text-sm text-rose-500">{t(errors.country.message ?? '')}</p>
-        ) : null}
-      </div>
 
-      <div className="grid gap-2">
+        <TextField
-        <label className="text-sm font-medium" htmlFor="city">
+          label={t('form.city')}
-          {t('form.city')}
-        </label>
-        <input
-          id="city"
-          className="rounded border border-slate-300 px-3 py-2"
           placeholder={t('form.cityPlaceholder')}
           {...register('city')}
+          error={Boolean(errors.city)}
+          helperText={errors.city ? t(errors.city.message ?? '') : ''}
+          fullWidth
         />
-        {errors.city ? <p className="text-sm text-rose-500">{t(errors.city.message ?? '')}</p> : null}
-      </div>
 
-      <div className="grid gap-2">
+        <Grid container spacing={2}>
-        <label className="text-sm font-medium" htmlFor="start">
+          <Grid item xs={12} md={6}>
-          {t('form.startDate')}
+            <TextField
-        </label>
+              label={t('form.startDate')}
-        <input id="start" type="date" className="rounded border border-slate-300 px-3 py-2" {...register('start')} />
+              type="date"
-        {errors.start ? <p className="text-sm text-rose-500">{t(errors.start.message ?? '')}</p> : null}
+              InputLabelProps={{ shrink: true }}
-      </div>
+              {...register('start')}
+              error={Boolean(errors.start)}
+              helperText={errors.start ? t(errors.start.message ?? '') : ''}
+              fullWidth
+            />
+          </Grid>
+          <Grid item xs={12} md={6}>
+            <TextField
+              label={t('form.endDate')}
+              type="date"
+              InputLabelProps={{ shrink: true }}
+              {...register('end')}
+              error={Boolean(errors.end)}
+              helperText={errors.end ? t(errors.end.message ?? '') : ''}
+              fullWidth
+            />
+          </Grid>
+        </Grid>
 
-      <div className="grid gap-2">
+        <TextField
-        <label className="text-sm font-medium" htmlFor="end">
+          label={t('form.notes')}
-          {t('form.endDate')}
-        </label>
-        <input id="end" type="date" className="rounded border border-slate-300 px-3 py-2" {...register('end')} />
-        {errors.end ? <p className="text-sm text-rose-500">{t(errors.end.message ?? '')}</p> : null}
-      </div>
-
-      <div className="grid gap-2">
-        <label className="text-sm font-medium" htmlFor="notes">
-          {t('form.notes')}
-        </label>
-        <textarea
-          id="notes"
-          className="min-h-[96px] rounded border border-slate-300 px-3 py-2"
           placeholder={t('form.notesPlaceholder')}
           {...register('notes')}
+          error={Boolean(errors.notes)}
+          helperText={errors.notes ? t(errors.notes.message ?? '') : ''}
+          fullWidth
+          multiline
+          minRows={3}
         />
-        {errors.notes ? <p className="text-sm text-rose-500">{t(errors.notes.message ?? '')}</p> : null}
-      </div>
 
-      <div className="grid gap-2 md:grid-cols-2">
+        <Grid container spacing={2}>
-        <div>
+          <Grid item xs={12} md={6}>
-          <label className="text-sm font-medium" htmlFor="lat">
+            <TextField
-            {t('form.latitude')}
+              label={t('form.latitude')}
-          </label>
+              type="number"
-          <input
+              inputProps={{ step: 'any' }}
-            id="lat"
+              {...register('lat', { valueAsNumber: true })}
-            type="number"
+              error={Boolean(errors.lat)}
-            step="any"
+              helperText={errors.lat ? t(errors.lat.message ?? '') : ''}
-            className="w-full rounded border border-slate-300 px-3 py-2"
+              fullWidth
-            {...register('lat', { valueAsNumber: true })}
+            />
-          />
+          </Grid>
-          {errors.lat ? <p className="text-sm text-rose-500">{t(errors.lat.message ?? '')}</p> : null}
+          <Grid item xs={12} md={6}>
-        </div>
+            <TextField
-        <div>
+              label={t('form.longitude')}
-          <label className="text-sm font-medium" htmlFor="lng">
+              type="number"
-            {t('form.longitude')}
+              inputProps={{ step: 'any' }}
-          </label>
+              {...register('lng', { valueAsNumber: true })}
-          <input
+              error={Boolean(errors.lng)}
-            id="lng"
+              helperText={errors.lng ? t(errors.lng.message ?? '') : ''}
-            type="number"
+              fullWidth
-            step="any"
+            />
-            className="w-full rounded border border-slate-300 px-3 py-2"
+          </Grid>
-            {...register('lng', { valueAsNumber: true })}
+        </Grid>
-          />
-          {errors.lng ? <p className="text-sm text-rose-500">{t(errors.lng.message ?? '')}</p> : null}
-        </div>
-      </div>
 
-      {isGeocoding ? <p className="text-xs text-slate-500">{t('geocoding.detecting')}</p> : null}
+        {isGeocoding ? (
-      {!isGeocoding && geocodeFailed ? (
+          <Typography variant="caption" color="text.secondary">
-        <p className="text-xs text-rose-500">{t('geocoding.failed')}</p>
+            {t('geocoding.detecting')}
-      ) : null}
+          </Typography>
+        ) : null}
+        {!isGeocoding && geocodeFailed ? (
+          <Alert severity="warning" variant="outlined">
+            {t('geocoding.failed')}
+          </Alert>
+        ) : null}
 
-      <div className="flex justify-end gap-2">
+        <Stack direction="row" justifyContent="flex-end" spacing={2}>
-        <button
+          <Button variant="outlined" onClick={() => onCancel?.()}>
-          type="button"
+            {t('form.cancel')}
-          className="rounded border border-slate-300 px-4 py-2"
+          </Button>
-          onClick={() => onCancel?.()}
+          <Button type="submit" variant="contained" disabled={isSubmitting}>
-        >
+            {editingVisit ? t('form.update') : t('form.create')}
-          {t('form.cancel')}
+          </Button>
-        </button>
+        </Stack>
-        <button
+      </Stack>
-          type="submit"
+    </Box>
-          disabled={isSubmitting}
-          className="rounded bg-primary px-4 py-2 font-semibold text-white hover:bg-primary/90 disabled:opacity-60"
-        >
-          {editingVisit ? t('form.update') : t('form.create')}
-        </button>
-      </div>
-    </form>
   );
 }

client/src/features/visits/components/VisitList.tsx

@@ -1,4 +1,7 @@
 import { useTranslation } from 'react-i18next';
+import { Button, Card, CardActions, CardContent, CircularProgress, Stack, Typography } from '@mui/material';
+import EditIcon from '@mui/icons-material/Edit';
+import DeleteIcon from '@mui/icons-material/Delete';
 import { useDeleteVisitMutation, useVisitsQuery } from '../hooks/useVisitQueries';
 import type { Visit } from '../types';
 
@@ -12,48 +15,58 @@ export function VisitList({ onEdit }: VisitListProps) {
   const { t } = useTranslation();
 
   if (isLoading) {
-    return <p className="text-sm text-slate-500">{t('list.loading')}</p>;
+    return (
+      <Stack direction="row" spacing={1} alignItems="center" justifyContent="center" sx={{ py: 4 }}>
+        <CircularProgress size={20} />
+        <Typography variant="body2" color="text.secondary">
+          {t('list.loading')}
+        </Typography>
+      </Stack>
+    );
   }
 
   if (!visits.length) {
-    return <p className="text-sm text-slate-500">{t('list.empty')}</p>;
+    return (
+      <Typography variant="body2" color="text.secondary" sx={{ p: 3 }}>
+        {t('list.empty')}
+      </Typography>
+    );
   }
 
   return (
-    <ul className="space-y-3">
+    <Stack spacing={2} sx={{ p: 2 }}>
       {visits.map((visit) => (
-        <li key={visit.id} className="rounded-lg bg-white p-3 shadow-sm">
+        <Card key={visit.id} variant="outlined">
-          <div className="flex justify-between gap-3">
+          <CardContent>
-            <div className="space-y-1">
+            <Typography variant="h6" fontWeight={600} gutterBottom>
-              <h3 className="text-lg font-semibold">
+              {visit.location.country}
-                {visit.location.country}
+              {visit.location.city ? ` · ${visit.location.city}` : ''}
-                {visit.location.city ? ` · ${visit.location.city}` : null}
+            </Typography>
-              </h3>
+            <Typography variant="body2" color="text.secondary">
-              <p className="text-sm text-slate-500">
+              {visit.date.start}
-                {visit.date.start}
+              {visit.date.end ? ` — ${visit.date.end}` : ''}
-                {visit.date.end ? ` — ${visit.date.end}` : null}
+            </Typography>
-              </p>
+            {visit.notes ? (
-              {visit.notes ? <p className="text-sm">{visit.notes}</p> : null}
+              <Typography variant="body2" color="text.primary" sx={{ mt: 1 }}>
-            </div>
+                {visit.notes}
-            <div className="flex shrink-0 flex-col items-end gap-2 text-sm">
+              </Typography>
-              <button
+            ) : null}
-                type="button"
+          </CardContent>
-                className="rounded bg-slate-100 px-2 py-1 hover:bg-slate-200"
+          <CardActions sx={{ justifyContent: 'flex-end', gap: 1, px: 2, pb: 2 }}>
-                onClick={() => onEdit(visit)}
+            <Button startIcon={<EditIcon />} size="small" onClick={() => onEdit(visit)}>
-              >
+              {t('list.edit')}
-                {t('list.edit')}
+            </Button>
-              </button>
+            <Button
-              <button
+              startIcon={<DeleteIcon />}
-                type="button"
+              size="small"
-                className="rounded bg-rose-100 px-2 py-1 text-rose-600 hover:bg-rose-200"
+              color="error"
-                onClick={() => deleteMutation.mutate(visit.id)}
+              onClick={() => deleteMutation.mutate(visit.id)}
-              >
+            >
-                {t('list.delete')}
+              {t('list.delete')}
-              </button>
+            </Button>
-            </div>
+          </CardActions>
-          </div>
+        </Card>
-        </li>
       ))}
-    </ul>
+    </Stack>
   );
 }

client/src/features/visits/components/VisitSummary.tsx

@@ -1,5 +1,6 @@
 import { useMemo } from 'react';
 import { useTranslation } from 'react-i18next';
+import { Card, CardContent, Grid, Paper, Typography } from '@mui/material';
 import { useVisitsQuery } from '../hooks/useVisitQueries';
 
 export function VisitSummary() {
@@ -15,19 +16,32 @@ export function VisitSummary() {
     };
   }, [visits]);
 
+  const summaryItems = [
+    { label: t('summary.totalVisits'), value: stats.totalVisits },
+    { label: t('summary.countries'), value: stats.uniqueCountries }
+  ];
+
   return (
-    <div className="rounded-lg bg-white p-4 shadow-sm">
+    <Card variant="outlined">
-      <h3 className="text-sm font-semibold text-slate-500">{t('summary.title')}</h3>
+      <CardContent>
-      <dl className="mt-3 grid grid-cols-2 gap-3 text-center">
+        <Typography variant="subtitle2" color="text.secondary" gutterBottom>
-        <div className="rounded bg-slate-100 p-3">
+          {t('summary.title')}
-          <dt className="text-xs uppercase tracking-wide text-slate-500">{t('summary.totalVisits')}</dt>
+        </Typography>
-          <dd className="text-xl font-bold">{stats.totalVisits}</dd>
+        <Grid container spacing={2}>
-        </div>
+          {summaryItems.map((item) => (
-        <div className="rounded bg-slate-100 p-3">
+            <Grid item xs={6} key={item.label}>
-          <dt className="text-xs uppercase tracking-wide text-slate-500">{t('summary.countries')}</dt>
+              <Paper elevation={0} sx={{ p: 2, bgcolor: 'grey.100', textAlign: 'center' }}>
-          <dd className="text-xl font-bold">{stats.uniqueCountries}</dd>
+                <Typography variant="overline" display="block" color="text.secondary">
-        </div>
+                  {item.label}
-      </dl>
+                </Typography>
-    </div>
+                <Typography variant="h5" fontWeight={700} color="text.primary">
+                  {item.value}
+                </Typography>
+              </Paper>
+            </Grid>
+          ))}
+        </Grid>
+      </CardContent>
+    </Card>
   );
 }

client/src/styles/theme.ts

@@ -0,0 +1,18 @@
+import { createTheme } from '@mui/material/styles';
+
+export const appTheme = createTheme({
+  palette: {
+    primary: {
+      main: '#0b7285'
+    },
+    secondary: {
+      main: '#51cf66'
+    },
+    background: {
+      default: '#f1f5f9'
+    }
+  },
+  shape: {
+    borderRadius: 12
+  }
+});