Reset WhatsApp details after cleaning and bump versionCode to 277

[MihaiCristianCondrea]

Motivation

• Ensure WhatsApp details UI reflects the immediate results of a cleaning operation by resetting the details flow, showing a loading state, and re-scanning so users see whether data remains or is gone.
• Bump the Android versionCode to keep app versioning consistent with the release plan.

Description

• When a cleaning event is observed and currentType is set, replace the previous reload behavior with a new resetAndReloadFiles() routine that clears files/suggested, sets the ScreenState to loading (ScreenState.IsLoading()), and triggers loadFiles(type, 0) to re-scan.
• Added the private helper resetAndReloadFiles() in DetailsViewModel to encapsulate the reset + reload flow.
• Updated app/build.gradle.kts to change versionCode from 276 to 277.

Testing

• Ran ./gradlew test, which failed due to missing Android SDK configuration (SDK location not found; add ANDROID_HOME or sdk.dir in local.properties).
• No other automated tests were executed in this environment due to the SDK configuration error.

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Codex Task