Feat: Design rework: login, survey list, survey info, responses & logout

[bepo00]

Description

A broad design rework of the app's main user-facing flows, migrating remaining XML screens to Jetpack Compose and redesigning the login, survey list, survey info, responses, and logout experiences.

Highlights:

• Login: Migrated from XML layout to Compose (LoginScreen, PrivateServerForm, SessionConflictDialog); removed activity_login.xml.
• Survey list: Reworked list UI with image placeholders/padding, blur on cover image edges, and version chip repositioning.
• Survey info: Redesigned screen with its own SurveyInfoViewModel, simplified quota bar, and sync issue fix.
• Responses: Redesigned list and detail (ResponseDetailScreen, ResponseStatus), added drafts filter, value-saving on response pause, and user-visible error handling when a response file can't be opened.
• Logout: Dialog now has synced/unsynced variants gated on a fresh DB unsynced-responses check; manual logout fully wipes local data while session-expired keeps re-login state.
• Strings: Updated default strings and synced translations across all locales (ar, de, es, fr, nl, pt).

Type

• Bug fix
• New feature
• Refactor
• Documentation update

How to Test

1. Build the APK:

   ./gradlew assembleDebug

2. Install on emulator or device:

   ./gradlew installDebug

3. Test your changes:

   • Log in via both default and private-server flows; verify the session conflict dialog
   • Browse the survey list and open a survey's info screen
   • Complete a survey, view it under Responses, open its detail, and tap a photo/video/map
   • Verify a friendly error appears when a response file can't be opened (no viewer app)
   • Log out with synced vs unsynced responses and confirm the correct dialog variant

Testing

• Unit tests pass (./gradlew test)
• Instrumentation tests pass (./gradlew connectedAndroidTest)
• Tested on emulator
• Tested on physical device (if hardware-specific)

Checklist

• Follows Kotlin coding conventions
• No new lint warnings
• No regressions in existing functionality
• Tested offline mode (if applicable)

Related Issue

Closes #

Additional Notes

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