refactor：

1、添加全局toast
2、将CopyButton拆分为useCopy hook

package-lock.json

@@ -24,6 +24,7 @@
         "dayjs": "^1.11.19",
         "dexie": "^4.2.1",
         "dexie-react-hooks": "^4.2.0",
+        "notistack": "^3.0.2",
         "react": "^19.2.3",
         "react-dom": "^19.2.3",
         "react-markdown": "^6.0.3",
@@ -5895,6 +5896,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/goober": {
+      "version": "2.1.18",
+      "resolved": "https://registry.npmmirror.com/goober/-/goober-2.1.18.tgz",
+      "integrity": "sha512-2vFqsaDVIT9Gz7N6kAL++pLpp41l3PfDuusHcjnGLfR6+huZkl6ziX+zgVC3ZxpqWhzH6pyDdGrCeDhMIvwaxw==",
+      "license": "MIT",
+      "peerDependencies": {
+        "csstype": "^3.0.10"
+      }
+    },
     "node_modules/gopd": {
       "version": "1.2.0",
       "resolved": "https://registry.npmmirror.com/gopd/-/gopd-1.2.0.tgz",
@@ -8161,6 +8171,37 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/notistack": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmmirror.com/notistack/-/notistack-3.0.2.tgz",
+      "integrity": "sha512-0R+/arLYbK5Hh7mEfR2adt0tyXJcCC9KkA2hc56FeWik2QN6Bm/S4uW+BjzDARsJth5u06nTjelSw/VSnB1YEA==",
+      "license": "MIT",
+      "dependencies": {
+        "clsx": "^1.1.0",
+        "goober": "^2.0.33"
+      },
+      "engines": {
+        "node": ">=12.0.0",
+        "npm": ">=6.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/notistack"
+      },
+      "peerDependencies": {
+        "react": "^17.0.0 || ^18.0.0 || ^19.0.0",
+        "react-dom": "^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
+    "node_modules/notistack/node_modules/clsx": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmmirror.com/clsx/-/clsx-1.2.1.tgz",
+      "integrity": "sha512-EcR6r5a8bj6pu3ycsa/E/cKVGuTgZJZdsyUYHOksG/UHIiKfjxzRxYJpyVBwYaQeOvghal9fcc4PidlgzugAQg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/nth-check": {
       "version": "2.1.1",
       "resolved": "https://registry.npmmirror.com/nth-check/-/nth-check-2.1.1.tgz",