fix: resolve all 25 ESLint react-hooks and react-refresh violations

Replace useEffect-based state resets in dialogs with React's render-time
state adjustment pattern. Wrap ref assignments in hooks with useEffect.
Suppress known third-party library warnings (shadcn CVA exports,
TanStack Table). Remove warn downgrades from eslint config.

eslint.config.js

@@ -20,9 +20,6 @@ export default defineConfig([
       globals: globals.browser,
     },
     rules: {
-      // TODO: fix these incrementally — pre-existing violations from react-hooks v7 upgrade
-      'react-hooks/set-state-in-effect': 'warn',
-      'react-hooks/refs': 'warn',
       'react-refresh/only-export-components': ['warn', { allowConstantExport: true }],
     },
   },