Add input validation for payment amount in WorkOrderCompletion

[Copilot]

Addresses missing validation for payment amounts in the work order completion flow. Without validation, users could submit invalid payment requests (zero, negative, or non-numeric values).

Changes:

• Added MIN_PAYMENT_AMOUNT constant (0.01) for consistent validation threshold
• Implemented isValidAmount() helper to validate numeric input ≥ minimum
• Added HTML5 min attribute to prevent invalid input at the browser level
• Display validation error message when submission is attempted with invalid amount

Example:

const isValidAmount = (amount: string): boolean => {
  const parsed = parseFloat(amount)
  return !isNaN(parsed) && parsed >= MIN_PAYMENT_AMOUNT
}

// In completeWorkOrder()
if (requestPayment && !isValidAmount(requestedAmount)) {
  setValidationError(`Payment amount must be at least $${MIN_PAYMENT_AMOUNT.toFixed(2)}`)
  return
}

Validation blocks form submission and shows "Payment amount must be at least $0.01" for empty strings, non-numeric input, or amounts below threshold.

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Project	Deployment	Preview	Comments	Updated (UTC)
biotech-maintenance-platform	Ready	Preview	Comment	Dec 11, 2025 11:54pm

[Copilot]

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