feat: basic layout and pages

- add basic layout with sidebar and main container
- add three menus in sidebar
- add people form page for post people
- add text and image input for recognize people info
- add people table page for show peoples

src/styles/base.css

@@ -0,0 +1,36 @@
+/* 全局基础样式 */
+@supports (font-variation-settings: normal) {
+  :root { font-synthesis-weight: none; }
+}
+
+html, body, #root {
+  height: 100%;
+}
+
+body {
+  margin: 0;
+  background: radial-gradient(1200px 600px at 70% -100px, rgba(92,124,255,0.25) 0%, rgba(92,124,255,0.06) 45%, transparent 60%),
+              radial-gradient(800px 400px at -200px 20%, rgba(120,220,255,0.15) 0%, rgba(120,220,255,0.06) 50%, transparent 70%),
+              #0f172a; /* slate-900 */
+  color: #e5e7eb; /* gray-200 */
+  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+/* 让 Ant Design 的 Layout 充满视口 */
+.app-root {
+  min-height: 100vh;
+}
+
+/* 统一滚动条样式（轻度） */
+* {
+  scrollbar-width: thin;
+  scrollbar-color: rgba(255,255,255,0.2) transparent;
+}
+
+::-webkit-scrollbar { width: 8px; height: 8px; }
+::-webkit-scrollbar-thumb {
+  background: rgba(255,255,255,0.2);
+  border-radius: 6px;
+}