fix: BLS-Import prüft bei Dateiauswahl, Import nur per Schalter

Eine Datei pro Typ, sofortiger Dry-Run, Schalter startet den Write.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/pages/AdminBlsImportPage.jsx

@@ -1,8 +1,96 @@
 import { useEffect, useState } from 'react'
 import { api } from '../utils/api'
 
-function FileImportBlock({ label, kind, busy, onRun }) {
+function summarizeCheck(kind, res) {
+  if (!res) return ''
+  if (kind === 'components') return `${res.attributes ?? 0} Stoffe erkannt`
+  return `${res.foods ?? 0} Lebensmittel, ${res.attribute_columns ?? 0} Stoffspalten`
+}
+
+function ImportSwitch({ on, disabled, busy, onEnable }) {
+  return (
+    <label style={{ display: 'flex', alignItems: 'center', gap: 10, opacity: disabled ? 0.5 : 1 }}>
+      <button
+        type="button"
+        role="switch"
+        aria-checked={on}
+        aria-label="Import"
+        disabled={disabled || busy || on}
+        onClick={() => { if (!on && !disabled && !busy) onEnable() }}
+        style={{
+          width: 44,
+          height: 24,
+          borderRadius: 12,
+          border: 'none',
+          padding: 0,
+          background: on ? 'var(--accent)' : 'var(--border)',
+          position: 'relative',
+          cursor: disabled || busy || on ? 'not-allowed' : 'pointer',
+        }}
+      >
+        <span
+          style={{
+            position: 'absolute',
+            top: 2,
+            left: on ? 22 : 2,
+            width: 20,
+            height: 20,
+            borderRadius: '50%',
+            background: '#fff',
+            display: 'block',
+          }}
+        />
+      </button>
+      <span style={{ fontSize: 14, color: 'var(--text1)' }}>
+        {on ? 'Importiert' : 'Import'}
+      </span>
+    </label>
+  )
+}
+
+function FileImportBlock({ label, kind, onImported }) {
   const [file, setFile] = useState(null)
+  const [check, setCheck] = useState(null)
+  const [error, setError] = useState(null)
+  const [busy, setBusy] = useState(null)
+  const [imported, setImported] = useState(false)
+  const [applyResult, setApplyResult] = useState(null)
+
+  const apiFn = kind === 'components' ? api.adminBlsImportComponents : api.adminBlsImportFoods
+
+  const checkFile = async (nextFile) => {
+    setError(null)
+    setCheck(null)
+    setApplyResult(null)
+    setImported(false)
+    if (!nextFile) return
+    setBusy('check')
+    try {
+      setCheck(await apiFn(nextFile, true))
+    } catch (e) {
+      setError(e.message)
+    } finally {
+      setBusy(null)
+    }
+  }
+
+  const applyImport = async () => {
+    if (!file || !check) return
+    setBusy('apply')
+    setError(null)
+    try {
+      const res = await apiFn(file, false)
+      setApplyResult(res)
+      setImported(true)
+      onImported?.()
+    } catch (e) {
+      setError(e.message)
+      setImported(false)
+    } finally {
+      setBusy(null)
+    }
+  }
+
   return (
     <div className="form-row" style={{ flexDirection: 'column', alignItems: 'stretch', gap: 8, marginTop: 16 }}>
       <label className="form-label">{label}</label>
@@ -10,55 +98,50 @@ function FileImportBlock({ label, kind, busy, onRun }) {
         type="file"
         accept=".xlsx"
         className="form-input"
-        onChange={(e) => setFile(e.target.files?.[0] || null)}
+        disabled={busy}
+        onChange={(e) => {
+          const next = e.target.files?.[0] || null
+          setFile(next)
+          checkFile(next)
+        }}
+      />
+      {busy && <p style={{ fontSize: 13, color: 'var(--text2)', margin: 0 }}>{busy === 'apply' ? 'Importiere…' : 'Prüfe…'}</p>}
+      {error && <p style={{ color: 'var(--danger)', margin: 0 }}>{error}</p>}
+      {check && !error && (
+        <p style={{ fontSize: 13, color: 'var(--text2)', margin: 0 }}>
+          Prüfung: {summarizeCheck(kind, check)}
+        </p>
+      )}
+      {applyResult && (
+        <p style={{ fontSize: 13, color: 'var(--text2)', margin: 0 }}>
+          {applyResult.inserted ?? 0} neu · {applyResult.updated ?? 0} aktualisiert
+        </p>
+      )}
+      <ImportSwitch
+        on={imported}
+        disabled={!check || !!error}
+        busy={busy}
+        onEnable={applyImport}
       />
-      {file && <p style={{ fontSize: 12, color: 'var(--text2)', margin: 0 }}>{file.name}</p>}
-      <div style={{ display: 'flex', gap: 8, flexWrap: 'wrap' }}>
-        <button type="button" className="btn btn-secondary" disabled={!file || busy} onClick={() => onRun(kind, file, true)}>
-          Prüfen
-        </button>
-        <button type="button" className="btn btn-primary" disabled={!file || busy} onClick={() => onRun(kind, file, false)}>
-          Anwenden
-        </button>
-      </div>
     </div>
   )
 }
 
 export default function AdminBlsImportPage() {
   const [status, setStatus] = useState(null)
-  const [msg, setMsg] = useState(null)
   const [error, setError] = useState(null)
-  const [busy, setBusy] = useState(false)
 
   const load = () => {
     api.adminBlsStatus().then(setStatus).catch((e) => setError(e.message))
   }
   useEffect(() => { load() }, [])
 
-  const run = async (kind, file, dry) => {
-    setError(null)
-    setBusy(true)
-    setMsg(dry ? 'Prüfe…' : 'Importiere…')
-    try {
-      const fn = kind === 'components' ? api.adminBlsImportComponents : api.adminBlsImportFoods
-      const res = await fn(file, dry)
-      setMsg(JSON.stringify(res, null, 2))
-      if (!dry) load()
-    } catch (e) {
-      setError(e.message)
-      setMsg(null)
-    } finally {
-      setBusy(false)
-    }
-  }
-
   return (
     <div className="card">
       <h1 className="page-title">BLS 4.0 importieren</h1>
       <p style={{ fontSize: 13, color: 'var(--text2)', lineHeight: 1.6 }}>
         Offizielle Dateien von blsdb.de (frei verfügbar, MRI). Codes bleiben erhalten.
-        Zuerst Components, dann die Datendatei. Immer zuerst „Prüfen“.
+        Datei wählen prüft automatisch. Der Schalter startet den Import. Zuerst Components, dann Daten.
       </p>
       {status && (
         <p style={{ fontSize: 13 }}>
@@ -67,9 +150,8 @@ export default function AdminBlsImportPage() {
         </p>
       )}
       {error && <p style={{ color: 'var(--danger)' }}>{error}</p>}
-      <FileImportBlock label="Components XLSX" kind="components" busy={busy} onRun={run} />
-      <FileImportBlock label="Daten XLSX" kind="foods" busy={busy} onRun={run} />
-      {msg && <pre style={{ whiteSpace: 'pre-wrap', fontSize: 12, background: 'var(--surface2)', padding: 12, borderRadius: 8 }}>{msg}</pre>}
+      <FileImportBlock label="Components XLSX" kind="components" onImported={load} />
+      <FileImportBlock label="Daten XLSX" kind="foods" onImported={load} />
     </div>
   )
 }