Initial commit - Journey book (kniha jízd) automation system

Features:
- FastAPI backend for scraping attendance and journey book data
- Deterministic kilometer distribution with random variance
- Refueling form filling with km values
- Next.js frontend with date range selector
- Docker deployment setup

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

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

frontend/app/components/DataPreview.tsx

@@ -0,0 +1,215 @@
+'use client'
+
+import { useState } from 'react'
+import API_URL from '@/lib/api'
+
+interface DataPreviewProps {
+  data: any
+  loading: boolean
+  formData: any
+}
+
+export default function DataPreview({ data, loading, formData }: DataPreviewProps) {
+  const [filling, setFilling] = useState(false)
+  const [fillResult, setFillResult] = useState<any>(null)
+
+  const handleFillToWebsite = async () => {
+    if (!formData) return
+
+    setFilling(true)
+    setFillResult(null)
+
+    try {
+      const response = await fetch(`${API_URL}/api/fill/journeybook`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          username: formData.username,
+          password: formData.password,
+          start_date: formData.startDate,
+          end_date: formData.endDate,
+          start_km: parseInt(formData.startKm),
+          end_km: parseInt(formData.endKm),
+          vehicle_registration: formData.vehicleRegistration,
+          variance: parseFloat(formData.variance),
+          dry_run: false
+        }),
+      })
+
+      if (!response.ok) {
+        const errorData = await response.json()
+        throw new Error(errorData.detail || 'Chyba při vyplňování dat')
+      }
+
+      const result = await response.json()
+      setFillResult(result)
+    } catch (err: any) {
+      alert('Chyba: ' + err.message)
+    } finally {
+      setFilling(false)
+    }
+  }
+  if (loading) {
+    return (
+      <div className="bg-white/98 backdrop-blur-lg rounded-3xl shadow-2xl border border-white/30 overflow-hidden">
+        <div className="flex flex-col items-center justify-center h-96 p-8">
+          <div className="relative">
+            <div className="animate-spin rounded-full h-20 w-20 border-4 border-blue-200"></div>
+            <div className="animate-spin rounded-full h-20 w-20 border-t-4 border-blue-600 absolute top-0"></div>
+          </div>
+          <p className="mt-6 text-gray-700 font-semibold text-lg">Načítání dat...</p>
+        </div>
+      </div>
+    )
+  }
+
+  if (!data) {
+    return (
+      <div className="bg-white/98 backdrop-blur-lg rounded-3xl shadow-2xl border border-white/30 overflow-hidden">
+        <div className="bg-gradient-to-r from-purple-50 to-purple-100 px-8 py-6 border-b border-purple-200">
+          <div className="flex items-center gap-4">
+            <div className="w-12 h-12 bg-gradient-to-br from-purple-500 to-purple-600 rounded-xl flex items-center justify-center shadow-lg">
+              <svg className="w-7 h-7 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z" />
+              </svg>
+            </div>
+            <h2 className="text-3xl font-bold text-gray-800">Náhled dat</h2>
+          </div>
+        </div>
+        <div className="p-8">
+        <div className="flex flex-col items-center justify-center py-16 text-center">
+          <div className="w-20 h-20 bg-gray-100 rounded-full flex items-center justify-center mb-4">
+            <svg className="w-10 h-10 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z" />
+            </svg>
+          </div>
+          <p className="text-gray-500 font-medium">
+            Vyplňte formulář a klikněte na "Vypočítat"
+          </p>
+          <p className="text-gray-400 text-sm mt-1">
+            Data se zobrazí zde
+          </p>
+        </div>
+        </div>
+      </div>
+    )
+  }
+
+  return (
+    <div className="bg-white/98 backdrop-blur-lg rounded-3xl shadow-2xl border border-white/30 overflow-hidden">
+      <div className="bg-gradient-to-r from-purple-50 to-purple-100 px-8 py-6 border-b border-purple-200">
+        <div className="flex items-center gap-4">
+          <div className="w-12 h-12 bg-gradient-to-br from-purple-500 to-purple-600 rounded-xl flex items-center justify-center shadow-lg">
+            <svg className="w-7 h-7 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z" />
+            </svg>
+          </div>
+          <h2 className="text-3xl font-bold text-gray-800">Náhled dat</h2>
+        </div>
+      </div>
+      <div className="p-8">
+
+      <div className="mb-6 grid grid-cols-2 gap-3 bg-gradient-to-br from-blue-50 to-indigo-50 p-5 rounded-xl border border-blue-100">
+        <div>
+          <p className="text-sm text-gray-600">Měsíc</p>
+          <p className="font-semibold text-lg">{data.month}</p>
+        </div>
+        <div>
+          <p className="text-sm text-gray-600">Celkem záznamů</p>
+          <p className="font-semibold text-lg">{data.total_entries}</p>
+        </div>
+        <div>
+          <p className="text-sm text-gray-600">Počáteční km</p>
+          <p className="font-semibold text-lg">{data.start_km.toLocaleString()}</p>
+        </div>
+        <div>
+          <p className="text-sm text-gray-600">Koncový km</p>
+          <p className="font-semibold text-lg">{data.end_km.toLocaleString()}</p>
+        </div>
+        <div>
+          <p className="text-sm text-gray-600">Celkem ujeto</p>
+          <p className="font-semibold text-lg">{(data.end_km - data.start_km).toLocaleString()} km</p>
+        </div>
+        <div>
+          <p className="text-sm text-gray-600">Filtrováno dnů</p>
+          <p className="font-semibold text-lg">{data.filtered_days}</p>
+        </div>
+      </div>
+
+      <div className="overflow-auto max-h-96 rounded-xl border border-gray-200">
+        <table className="w-full text-sm">
+          <thead className="bg-gradient-to-r from-gray-50 to-gray-100 sticky top-0">
+            <tr>
+              {data.entries.length > 0 && Object.keys(data.entries[0]).map((key: string) => (
+                <th key={key} className="px-4 py-3 text-left font-bold text-gray-700 border-b-2 border-gray-300 whitespace-nowrap">
+                  {key}
+                </th>
+              ))}
+            </tr>
+          </thead>
+          <tbody className="divide-y divide-gray-100 bg-white">
+            {data.entries.map((entry: any, index: number) => (
+              <tr key={index} className="hover:bg-blue-50 transition-colors">
+                {Object.keys(entry).map((key: string) => (
+                  <td key={key} className="px-4 py-3 text-right text-gray-600">
+                    {entry[key] !== null && entry[key] !== undefined ? entry[key] : '-'}
+                  </td>
+                ))}
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+
+      {formData && formData.startDate === '2025-01-01' && (
+        <div className="mt-6">
+          <button
+            onClick={handleFillToWebsite}
+            disabled={filling}
+            className="w-full bg-gradient-to-r from-orange-600 to-orange-700 hover:from-orange-700 hover:to-orange-800 text-white font-bold py-4 px-6 rounded-xl shadow-lg hover:shadow-2xl transform hover:-translate-y-1 transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed"
+          >
+            <span className="flex items-center justify-center gap-3">
+              <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-8l-4-4m0 0L8 8m4-4v12" />
+              </svg>
+              <span className="text-lg">{filling ? 'Vyplňování...' : 'Vyplnit na web'}</span>
+            </span>
+          </button>
+
+          {fillResult && (
+            <div className={`mt-4 ${fillResult.dry_run ? 'bg-blue-50 border-blue-200' : 'bg-green-50 border-green-200'} border rounded-xl p-4`}>
+              <h3 className={`font-bold ${fillResult.dry_run ? 'text-blue-900' : 'text-green-900'} mb-2`}>
+                {fillResult.dry_run ? 'Výsledek DRY RUN:' : 'Výsledek vyplňování:'}
+              </h3>
+              <div className={`text-sm ${fillResult.dry_run ? 'text-blue-800' : 'text-green-800'}`}>
+                <p>Měsíc: {fillResult.month}</p>
+                <p>Celkem řádků: {fillResult.total_rows}</p>
+                {fillResult.dry_run ? (
+                  <p>Připraveno aktualizací: {fillResult.updates_prepared}</p>
+                ) : (
+                  <>
+                    <p>Úspěšně vyplněno: {fillResult.successful}</p>
+                    <p>Chyby: {fillResult.failed}</p>
+                  </>
+                )}
+                {fillResult.dry_run && (
+                  <p className="mt-2 font-semibold text-orange-700">
+                    ⚠️ DRY RUN MODE - Data nebyla odeslána na web
+                  </p>
+                )}
+                {!fillResult.dry_run && fillResult.successful > 0 && (
+                  <p className="mt-2 font-semibold text-green-700">
+                    ✅ Data byla úspěšně vyplněna. Nyní zkontrolujte na webu a klikněte "Uzavřít měsíc" ručně.
+                  </p>
+                )}
+              </div>
+            </div>
+          )}
+        </div>
+      )}
+      </div>
+    </div>
+  )
+}