## ADDED Requirements

### Requirement: Validate on the target Xiaomi Android 15 device
The app SHALL be validated on the user's Xiaomi 12S running HyperOS 3 and Android 15 before the SMS capture behavior is considered complete.

#### Scenario: Foreground validation
- **WHEN** the app is open in the foreground and a test SMS containing `这是一条短信原文样本` is received
- **THEN** the app MUST show that SMS body as the latest received SMS content

#### Scenario: Background validation
- **WHEN** the app has been moved to the background and a test SMS containing new SMS content is received
- **THEN** the app MUST either show that new SMS body after returning to the app or report that background delivery was blocked

#### Scenario: Lock screen validation
- **WHEN** the device is locked and a test SMS is received
- **THEN** the app MUST show the received result after unlock or report that delivery was blocked under lock screen conditions

### Requirement: Validate SMS body handling with representative samples
The SMS body handling logic SHALL be validated with representative SMS examples and failure examples.

#### Scenario: Common valid samples
- **WHEN** tests include Chinese notices, English notification-like messages, multi-part messages, and regular promotional text
- **THEN** all expected SMS bodies MUST be preserved with the correct original content

#### Scenario: Failure samples
- **WHEN** tests include empty bodies, unreadable message input, or missing permission states
- **THEN** the app MUST return a structured failure instead of a fabricated SMS result

### Requirement: Validate optional API assumptions separately
The app SHALL validate Google SMS APIs independently from the primary system broadcast path.

#### Scenario: Google Play services is available
- **WHEN** Google Play services is installed and supports SMS User Consent or SMS Retriever
- **THEN** the app MUST run an explicit optional-path test and record the result separately from system broadcast validation

#### Scenario: Google Play services is unavailable
- **WHEN** Google Play services is unavailable or incompatible on the target phone
- **THEN** the app MUST mark Google SMS API validation as skipped or unavailable without failing the primary SMS broadcast validation

### Requirement: Validate implementation without rebuilding development environment
The app SHALL reuse the existing local Android build environment reference and MUST NOT require reinstalling Android Studio, Gradle, or JDK as part of the implementation validation.

#### Scenario: Build configuration is prepared
- **WHEN** implementation begins after spec approval
- **THEN** the project MUST align its build setup with the existing Weather project environment or document any minimal project-specific difference