docs: reorganize markdown files into proper structure - #4

- Added isOverTrashZone() helper function that checks both X (right side) and Y (bottom) coordinates
- Fixed trash zone hit detection to properly detect when object is dragged to bottom-right corner
- Updated onDragMove and onDragEnd to use the new isOverTrashZone() function
- Constants: TRASH_ZONE_SIZE_DP=80, TRASH_ZONE_MARGIN_DP=16

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Fixed magic strings in TrashZone (now uses localized strings)
- Removed unused 'progress' variable
- Added release_to_delete and drag_to_delete strings (EN and TR)
- Improved drag movement with camera ray projection fallback
  - Objects can now be moved to areas without detected planes
  - Uses camera's view matrix to project movement

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Root cause: Camera ray projection fallback was using absolute screen
coordinates instead of delta movement, causing erratic object positioning.

Solution:
- Track last screen position (dragLastScreenX/Y) for delta calculation
- Use screen delta movement instead of absolute normalized coordinates
- Project finger movement to world XZ plane using camera vectors
- Apply delta to current position instead of recalculating from scratch
- Scale pixel-to-world conversion based on object distance from camera

Also includes style improvements to TrashZone:
- Add semi-transparent background
- Add subtle shadow effect
- Add subtle border
- Center text properly
- Increase size for better text fit

Fixes: drag-everywhere-bug
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Add semi-transparent background (alpha 0.7 normal, 0.85 hovered)
- Add subtle shadow effect for better visibility
- Add subtle border for definition
- Center text with TextAlign.Center and fillMaxWidth
- Increase size to 100x90dp for better text fit
- Add fillMaxSize to Column for proper centering

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Root cause: isOverTrashZone() was using incorrect dimensions (80dp x 80dp)
that didn't match the actual TrashZone component (100dp x 90dp).

Solution: Updated trash zone detection to use the correct dimensions:
- trashZoneWidth = 100.dp (matches component's width)
- trashZoneHeight = 90.dp (matches component's height)
- trashZonePadding = 16.dp

The detection area now correctly matches the visual trash zone position,
enabling reliable drag-to-delete functionality.

Fixes: trash-zone-delete-bug
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Added ObjectThumbnail composable for displaying 3D object previews
- Updated ObjectListItem in ARScreen with thumbnail support
- Updated ObjectListItem in ObjectListScreen with thumbnail support
- Uses placeholder icon (ViewInAr) based on model type
- Thumbnails display in styled boxes with rounded corners
- Selected state shows highlighted background

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Added Koin dependencies (koin-core, koin-android, koin-compose)
- Created DI modules: dataModule, applicationModule, presentationModule
- Created platform-specific modules for Android and iOS data sources
- Updated MainActivity to initialize Koin
- Updated App.kt to use koinInject() for ViewModels
- Simplified dependency wiring through DI container

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Added CapturedPhoto model in domain layer
- Created MediaRepository interface
- Implemented CapturePhotoUseCase
- Added Android MediaRepositoryImpl with MediaStore API
- Added capture button to AR screen (camera icon)
- Implemented PixelCopy-based AR view capture
- Integrated with Koin DI
- Added iOS placeholder implementation

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Add CapturedVideo domain model to CapturedMedia.kt
- Extend MediaRepository interface with video recording methods
- Create RecordVideoUseCase for recording state management
- Update Android MediaRepositoryImpl with video recording support
- Add RecordingState sealed class to ARViewModel
- Add startRecording/stopRecording/toggleRecording functions
- Update ARScreen with VideoRecordButton and RecordingIndicator
- Add iOS MediaRepositoryIOSImpl stub implementation
- Update DI modules with RecordVideoUseCase
- Fix GalleryViewModel coroutine scope issue
- Fix iOS MainViewController to use Koin injection

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Added ObjectGalleryScreen with grid layout (2-column LazyVerticalGrid)
- Created ObjectGalleryCard component with visual previews
- Implemented model type badges (GLB/GLTF/USDZ/OBJ)
- Added search/filter functionality for objects
- Added empty state with import CTA
- Added no-results state for search
- Updated App.kt navigation with Screen.ObjectGallery
- Added i18n strings (EN/TR) for gallery

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Added Kover plugin for test coverage reporting
- Configured HTML and XML report generation
- Added exclusion filters for generated code
- Reports generated at build/reports/kover/

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Add VideoRecorder class for ARSceneView video capture using MediaRecorder
- Add camera-style controls: CameraStyleRecordButton, RecordingTimerDisplay
- Add CameraControlsBar with photo, record, and gallery buttons
- Add RecordingBorderGlow effect during recording
- Add recording duration timer in ARViewModel
- Update ARScreen with new camera-style controls layout
- Connect VideoRecorder to MediaRepository via callbacks

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

UI Changes:
- Move selected object indicator from bottom to top-left
- Redesign camera controls bar with clean centered layout
- Add semi-transparent background to camera controls
- Fix overlapping elements in AR screen

Video Recording Fix:
- Connect VideoRecorder directly to MediaRepository via Koin
- Register recording callbacks when ARSceneView is ready
- Clear callbacks properly on dispose

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Add ModelPreviewThumbnail expect/actual for cross-platform support
- Android: SceneView-based 3D rendering with auto-rotation
- iOS: Placeholder icon fallback
- Integrate into ObjectGalleryScreen
- Handle loading states and errors gracefully

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Remove environmentLoader to avoid missing HDR file crash
- Simplify Scene setup to use default environment
- Improve error handling in model loading

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

3D SceneView preview causing stability issues.
Temporarily disabled until resolved.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Rewrite VideoRecorder with MediaCodec + MediaMuxer approach
- Add thread safety with CountDownLatch synchronization
- Register GalleryViewModel in Koin AppModule
- Add gallery use case registrations (GetPhotos, GetVideos, DeletePhoto, DeleteVideo)
- Fix GalleryScreen callbacks in App.kt navigation
- Add MediaItem import for gallery functionality
- Fix capturePhoto → requestCapture method call

Video recording now properly:
- Handles cross-thread calls from IO dispatcher
- Uses InputSurface from MediaCodec instead of Canvas drawing
- Caps resolution at 1920x1080 with aspect ratio preservation
- Uses 8 Mbps bitrate for efficient encoding

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Root cause: startKoin was called unconditionally in onCreate,
causing KoinApplicationAlreadyStartedException when Activity
recreates (e.g., on configuration change, back navigation).

Solution: Check GlobalContext.getOrNull() before initializing
Koin to skip initialization if already started.

Fixes: KAN-1
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

ARViewModel was not receiving CapturePhotoUseCase due to positional
parameter injection. Changed to named parameter injection to ensure
proper dependency resolution.

Fixes: KAN-4

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Replace SpaceEvenly layout with weighted sections
- Use Box with weight(1f) for left and right sections
- Center record button uses fixed size (80dp) without weight
- Gallery button aligned to end of left section
- Photo capture button aligned to start of right section
- Remove unused placeholder boxes
- Clean up unused imports

Fixes: KAN-7

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Root cause: GalleryViewModel was being eagerly injected at App()
composition time, causing loadMedia() to run immediately even
before user navigates to Gallery screen. This triggered premature
MediaRepository access.

Solution: Move GalleryViewModel injection inside the Screen.Gallery
when branch, so it only initializes when user actually navigates
to the Gallery screen.

Fixes: KAN-6
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

- Delete 5 redundant/temporary files (INDEX.md root, documentation-organization-complete.md, documentation-cleanup-report.md, project-restructuring-report.md, design/app-icon/INDEX.md)
- Move 18 misplaced files to correct subdirectories (docs/bugs/, docs/guides/, docs/ios/, docs/reports/, docs/design/)
- Normalize all uppercase filenames to kebab-case (e.g. DEPLOYMENT_GUIDE.md → guides/deployment-guide.md)
- Move .github/workflows/ MD files to docs/ (IOS_WORKFLOW_README, QUICK_REFERENCE, IMPLEMENTATION_SUMMARY)
- Fix .claude/agents/README.md: add missing Bug Fixer agent (6 → 7 agents)
- Update docs/INDEX.md and docs/README.md to reflect new structure
- Update .claude/WORKFLOW_EXAMPLES.md: fix moved IOS_WORKFLOW_README path

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Keep HEAD (docs/md-reorganization) versions for all conflicts:
- strings.xml: keep gallery strings (object_gallery, search_objects, etc.)
- ARScreen.kt: keep asymmetric TrashZone, animated selected indicator
- ARView.kt: keep delta-based drag movement implementation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>