ADDED Requirements

Requirement: Upgrade confirmation dialog

The system SHALL show confirmation dialog before processing upgrades.

Scenario: Upgrade confirmation prompt

• WHEN user initiates an upgrade
• THEN display confirmation dialog with:
  • Title: "Confirm Plan Change"
  • Content: "Your new plan will take effect immediately. The unused portion of your current plan will be automatically credited."
  • Buttons: "Confirm" and "Cancel"

Scenario: User confirms upgrade

• WHEN user clicks "Confirm" on upgrade dialog
• THEN proceed with upgrade process

Scenario: User cancels upgrade

• WHEN user clicks "Cancel" on upgrade dialog
• THEN cancel upgrade process and return to plan selection

Requirement: Downgrade confirmation dialog

The system SHALL show confirmation dialog before processing downgrades.

Scenario: Downgrade confirmation prompt

• WHEN user initiates a downgrade
• THEN display confirmation dialog with:
  • Title: "Confirm Plan Change"
  • Content: "Your new plan will begin on [Next Billing Date]. No refund applies to the current billing period."
  • Buttons: "Continue" and "Cancel"

Scenario: User confirms downgrade

• WHEN user clicks "Continue" on downgrade dialog
• THEN proceed with downgrade process (scheduled for next billing cycle)

Scenario: User cancels downgrade

• WHEN user clicks "Cancel" on downgrade dialog
• THEN cancel downgrade process and return to plan selection

Requirement: Button debounce

The system SHALL prevent button double-clicks during plan change operations.

Scenario: Prevent rapid button clicks

• WHEN user clicks confirm button
• THEN disable button for 1.5 seconds to prevent duplicate requests