chore: apply cargo fmt across workspace and update docs

- Run cargo fmt on all Rust crates for consistent formatting
- Update CLAUDE.md with WASM plugin commands and dev.ps1 instructions
- Update wiki: add WASM plugin architecture, rewrite dev environment docs
- Minor frontend cleanup (unused imports)

apps/web/src/components/NotificationPanel.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useRef } from 'react';
-import { Badge, List, Popover, Button, Empty, Typography, Space, theme } from 'antd';
-import { BellOutlined, CheckOutlined } from '@ant-design/icons';
+import { Badge, List, Popover, Button, Empty, Typography, theme } from 'antd';
+import { BellOutlined } from '@ant-design/icons';
 import { useNavigate } from 'react-router-dom';
 import { useMessageStore } from '../stores/message';