Function handleFileSelect

src/components/SettingsModal.tsx:2174–2232

(e: React.ChangeEvent<HTMLInputElement>)

  }

  const handleFileSelect = (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0]
    // Always reset input so the same file can be re-selected
    e.target.value = ''
    if (!file) return

    if (file.size > MAX_IMPORT_SIZE) {
      setImportStatus('error')
      setImportMessage(`File too large (${(file.size / 1024 / 1024).toFixed(1)} MB). Maximum is 10 MB.`)
      return
    }

    const reader = new FileReader()
    reader.onload = (event) => {
      try {
        const imported = JSON.parse(event.target?.result as string)

        // Legacy export: just an array of conversations
        if (Array.isArray(imported)) {
          if (!imported.every((c: unknown) => c && typeof c === 'object' && 'id' in (c as Record<string, unknown>) && 'messages' in (c as Record<string, unknown>))) {
            throw new Error('Array does not contain valid conversations.')
          }
          setPendingImport({ conversations: imported })
          setPendingImportSummary(`${imported.length} conversations (legacy format)`)
          return
        }

        if (typeof imported !== 'object' || imported === null) {
          throw new Error('Not a valid G0DM0D3 export file.')
        }

        // Validate conversations field if present
        if (imported.conversations !== undefined && !Array.isArray(imported.conversations)) {
          throw new Error('Invalid backup: conversations field is not an array.')
        }

        // Must have conversations or _source marker
        if (!imported.conversations && !imported._source) {
          throw new Error('Not a valid G0DM0D3 export file.')
        }

        const convCount = imported.conversations?.length ?? 0
        const hasSettings = imported.theme || imported.defaultModel || imported.apiKey
        const memCount = imported.memories?.length ?? 0
        const parts = []
        if (convCount > 0) parts.push(`${convCount} conversations`)
        if (memCount > 0) parts.push(`${memCount} memories`)
        if (hasSettings) parts.push('settings')
        if (imported.apiKey) parts.push('API key')

        setPendingImport(imported)
        setPendingImportSummary(parts.join(', ') || 'backup data')
      } catch (err) {
        setImportStatus('error')
        setImportMessage(err instanceof Error ? err.message : 'Failed to parse export file.')
      }
    }
    reader.readAsText(file)