fix: FF calendar upload endpoint + path resolution for server deployment

- Add POST /api/eco/ff-upload to receive CSV from browser (saves to /tmp)
- _find_csv() checks /tmp, /app, project root — works local + Docker
- _run_ff_import now takes explicit csv_path parameter
- Frontend: Upload CSV button (file input) → uploads to server first,
  then Import into DB — with upload progress messages

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/pages/CalendarPage.tsx

@@ -1,6 +1,6 @@
-import { useState, useEffect, useCallback, useRef } from 'react'
+import { useState, useEffect, useCallback, useRef, ChangeEvent } from 'react'
 import clsx from 'clsx'
-import { RefreshCw, Download, ChevronDown, AlertTriangle, Check } from 'lucide-react'
+import { RefreshCw, Download, ChevronDown, AlertTriangle, Check, Upload } from 'lucide-react'
 
 const API = ''
 
@@ -132,10 +132,37 @@ function SurpriseChip({ ev }: { ev: FFEvent }) {
 function ImportPanel({ stats, onImported }: { stats: FFStats; onImported: () => void }) {
   const [status, setStatus] = useState<ImportStatus>({ running: false, last_result: null })
   const [syncResult, setSyncResult] = useState<string | null>(null)
+  const [uploadMsg, setUploadMsg] = useState<string | null>(null)
+  const [uploading, setUploading] = useState(false)
   const pollRef = useRef<ReturnType<typeof setInterval> | null>(null)
+  const fileRef = useRef<HTMLInputElement>(null)
+
+  const handleUpload = async (e: ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    setUploading(true)
+    setUploadMsg(`Uploading ${(file.size / 1_048_576).toFixed(1)} MB…`)
+    const form = new FormData()
+    form.append('file', file)
+    try {
+      const r = await fetch(`${API}/api/eco/ff-upload`, { method: 'POST', body: form }).then(x => x.json())
+      if (r.error) { setUploadMsg(`Upload error: ${r.error}`); return }
+      setUploadMsg(`✓ Uploaded ${r.size_mb} MB — click Import to load into DB`)
+    } catch (err) {
+      setUploadMsg(`Upload failed: ${err}`)
+    } finally {
+      setUploading(false)
+      if (fileRef.current) fileRef.current.value = ''
+    }
+  }
 
   const startImport = async () => {
-    await fetch(`${API}/api/eco/ff-import`, { method: 'POST' })
+    const r = await fetch(`${API}/api/eco/ff-import`, { method: 'POST' })
+    if (!r.ok) {
+      const err = await r.json().catch(() => ({}))
+      setUploadMsg(`Import error: ${err.detail ?? r.status}`)
+      return
+    }
     pollRef.current = setInterval(async () => {
       const r = await fetch(`${API}/api/eco/ff-import/status`).then(x => x.json())
       setStatus(r)
@@ -180,13 +207,23 @@ function ImportPanel({ stats, onImported }: { stats: FFStats; onImported: () =>
         </div>
       </div>
 
+      {/* Upload CSV (for server deployment) */}
+      <label className={clsx(
+        'px-3 py-1.5 rounded bg-slate-600 hover:bg-slate-500 flex items-center gap-1.5 text-white cursor-pointer',
+        uploading && 'opacity-50 cursor-wait'
+      )}>
+        <Upload size={13} />
+        {uploading ? 'Uploading…' : 'Upload CSV'}
+        <input ref={fileRef} type="file" accept=".csv" className="hidden" onChange={handleUpload} disabled={uploading} />
+      </label>
+
       <button
         onClick={startImport}
         disabled={status.running}
         className="px-3 py-1.5 rounded bg-blue-600 hover:bg-blue-500 disabled:opacity-50 disabled:cursor-wait flex items-center gap-1.5 text-white"
       >
         <Download size={13} />
-        {status.running ? 'Importing…' : 'Import CSV (2007-2025)'}
+        {status.running ? 'Importing…' : 'Import into DB'}
       </button>
 
       <button
@@ -197,6 +234,11 @@ function ImportPanel({ stats, onImported }: { stats: FFStats; onImported: () =>
         Sync Live (this week)
       </button>
 
+      {uploadMsg && (
+        <span className={clsx('text-xs', uploadMsg.startsWith('✓') ? 'text-emerald-400' : uploadMsg.startsWith('Upload error') || uploadMsg.startsWith('Import error') ? 'text-red-400' : 'text-yellow-400')}>
+          {uploadMsg}
+        </span>
+      )}
       {status.running && (
         <span className="text-yellow-400 text-xs animate-pulse">Importing CSV — this may take 30-60 s…</span>
       )}