feat: Add comprehensive test suite and misc improvements

- Add frontend unit tests with Vitest for components, hooks, pages, and utilities
- Add backend tests for webhooks, notifications, middleware, and edge cases
- Add ForgotPassword, NotFound, and ResetPassword pages
- Add migration for orphaned staff resources conversion
- Add coverage directory to gitignore (generated reports)
- Various bug fixes and improvements from previous work

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/vitest.config.ts

@@ -0,0 +1,42 @@
+import { defineConfig } from 'vitest/config';
+import react from '@vitejs/plugin-react';
+import path from 'path';
+
+export default defineConfig({
+  plugins: [react()],
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: ['./src/test/setup.ts'],
+    include: ['src/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json', 'html'],
+      all: true,
+      include: ['src/**/*.{ts,tsx}'],
+      exclude: [
+        'node_modules/',
+        'src/test/',
+        'src/**/__tests__/',
+        '**/*.d.ts',
+        '**/*.config.*',
+        '**/types.ts',
+        'src/main.tsx',
+        'src/vite-env.d.ts',
+      ],
+      thresholds: {
+        global: {
+          branches: 80,
+          functions: 80,
+          lines: 80,
+          statements: 80,
+        },
+      },
+    },
+  },
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+});