Add Android app (KMP + Jetpack Compose)

[TommyMaHaoKun]

Summary

• Port WiseLens (慧眼) iOS app to Android using Kotlin Multiplatform + Jetpack Compose
• Reuses shared business logic (Models.kt, MediaFilterApi.kt, SharedViewModel.kt) in commonMain
• Full-featured Android UI: animated gradient background, input screen, verdict cards, streaming chat with DeepSeek Reasoner
• Supports Android Share Intent (receive URLs from WeChat/browsers), dark/light theme

Architecture

android/
└── composeApp/
    └── src/
        ├── commonMain/   (shared KMP code, same as iOS)
        └── androidMain/  (Jetpack Compose UI + Android-specific code)

Test plan

• Open project in Android Studio, Gradle sync succeeds
• Run on emulator/device (API 24+)
• Test text input analysis
• Test WeChat URL analysis
• Test streaming chat on result screen
• Test Share Intent from other apps
• Verify dark/light theme switching

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