Add multi-selection and bulk actions for links

[Copilot]

The app required editing links individually to change profiles, attach tags, or perform other operations on multiple items. This adds selection mode with bulk operations.

Architecture Changes

State Management

• AccountViewModel tracks selection with selectedLinkIds: StateFlow<Set<Long>> and isSelectionMode: StateFlow<Boolean>
• Selection cleared on mode exit; auto-enters when items selected

Repository Layer

// Added to LinkRepository
suspend fun updateFavourite(id: Long, isFavourite: Long)
suspend fun updateLinkProfile(id: Long, profileId: Long)

Bulk Operations

// AccountViewModel methods
fun bulkDeleteLinks(linkIds: Set<Long>)  // Includes tag cleanup
fun bulkMoveLinksToProfile(linkIds: Set<Long>, targetProfileId: Long)
fun bulkAttachTags(linkIds: Set<Long>, tags: List<Tags>)
fun bulkToggleFavourite(linkIds: Set<Long>, setFavorite: Boolean)

UI Changes

Selection Mode Entry

• CheckSquare icon button in top bar toggles mode
• BackHandler intercepts to exit selection before other navigation

Item Components (DeeprItem, DeeprItemCompact, DeeprItemGrid)

• Added isSelectionMode and isSelected parameters
• Show checkbox instead of action buttons in selection mode
• Highlight selected items with primaryContainer color
• Disabled swipe-to-dismiss and long-press when selecting

Bulk Action Bar

• Bottom bar with selected count and actions: Select All, Attach Tags, Move to Profile, Favorite, Unfavorite, Delete
• Uses proper plurals resources for i18n (links_deleted, links_favorited)

Example Usage Flow

// User enters selection mode
viewModel.enterSelectionMode()

// Toggles individual item
onItemClick(MenuItem.ToggleSelection(account))
viewModel.toggleLinkSelection(account.id)

// Bulk favorite
viewModel.bulkToggleFavourite(selectedLinkIds, setFavorite = true)
// Auto-clears selection and syncs to markdown

Notes

Move to Profile and Attach Tags show TODO toasts; dialogs deferred to future work.

Warning

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If you need me to access, download, or install something from one of these locations, you can either:

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Original prompt

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This section details on the original issue you should resolve

<issue_title>Multiple selection and bulk actions for links</issue_title>
<issue_description>Description
The app does not support multiple selection or bulk actions for links. This makes common tasks unnecessarily difficult when managing many links.

Expected behavior

• Provide a way to select multiple links (e.g. selection mode)

• Allow bulk actions on selected links, such as:

  • Move links to another profile
  • Attach tags to multiple links

Actual behavior

• Only single-link actions are supported
• Links must be edited one by one to change profiles or attach tags

Proposed solution

• Add an explicit entry point for multi-select, such as a button in the title bar to enter selection mode

• Alternatively, enhance the existing swipe interaction:

  • Since links are already swipeable left/right (edit/delete), introduce a threshold or indicator
  • If the swipe passes a certain point, enter selection mode instead of immediately dismissing the item
  • Selected items remain visible and can be acted on in bulk

Rationale
Current swipe actions immediately remove the item from view, which prevents using swipe gestures for selection. A dedicated selection mode or a clear swipe indicator would enable multi-select without conflicting with existing copy/edit/delete behavior.

Notes
Long-press is currently used for copying links, so multi-select would need a dedicated selection mode or alternative interaction.
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Multiple selection and bulk actions for links #364

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[github-actions]

🧪 Integrated Test Results

The integrated UI tests have completed.

View full test results: Test Run #21786119270

Test reports are available in the artifacts section of the workflow run.

[github-actions]

🧪 Integrated Test Results

The integrated UI tests have completed.

View full test results: Test Run #21793801012

Test reports are available in the artifacts section of the workflow run.

[github-actions]

🧪 Integrated Test Results

The integrated UI tests have completed.

View full test results: Test Run #21793868182

Test reports are available in the artifacts section of the workflow run.