Add Práce mimo směnu column with proper layout

- Add separator column and Práce mimo směnu column to timeshift spreadsheet
- Implement vertical merging for Práce mimo směnu across rows 2-6
- Add proper styling with borders and rotated text
- Exclude separator/práce columns from regular merging logic
- Add test component for debugging

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

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

components/test-component.tsx

@@ -0,0 +1,31 @@
+"use client"
+
+import * as React from "react"
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
+import { Button } from "@/components/ui/button"
+
+interface TestComponentProps {
+  teamId: string
+  teamName: string
+}
+
+export function TestComponent({ teamId, teamName }: TestComponentProps) {
+  return (
+    <Card className="w-full">
+      <CardHeader>
+        <div className="flex items-center justify-between">
+          <div>
+            <CardTitle className="flex items-center gap-2">{teamName} - Test Component</CardTitle>
+            <CardDescription>Testing if React components load properly (Team ID: {teamId})</CardDescription>
+          </div>
+        </div>
+      </CardHeader>
+      <CardContent>
+        <div className="border rounded-lg p-4">
+          <p>This is a test component to verify React is working.</p>
+          <p>If you can see this, the basic React setup is functional.</p>
+        </div>
+      </CardContent>
+    </Card>
+  )
+}