* Handles sticker click - emits the sticker selection event and closes the keyboard * @see Requirements 8.7

* Checks if the reaction is from the logged-in user.

* Checks if edit mode state is properly cleaned up. * Used to verify the cleanup invariant. * * @param state - Edit mode state to check * @returns

* Returns true if the given position in `line` is inside a var(...) expression. * We check by scanning backwards for an unmatched `var(`.

* Checks if a language is available. * * @param language - The language code to check * @returns True if the language is available

Returns true if the user is blocked in either direction

* Marks a message as delivered if the sender is not the logged-in user * and the message hasn't been delivered yet. * Used by the SDK delivery m

Navigate to the side panel (mobile).

* Detects sessionID changes and starts the call when sessionID becomes non-empty. * Uses a guard to prevent double-starting when both ngOnChanges a

* Clean up on service destruction

* Handles category tab click * @see Requirements 8.5

* Handles keyboard events for close button accessibility. * Activates close button on Enter, Space, or Escape key press. * @see Requirement 15.2

Handle a message click from the history sidebar.

* Handles keyboard navigation for reaction items. * Only triggers click for the current user's reactions.

* Handles list item focus event. * Shows menu view when list item receives focus.

Handles clicking a message item.

* Handles mouse enter event. * Shows menu view and hides trailing view.

Start a new chat: reset state, stop streaming, bump key.

* Handle successful poll creation * @see Requirements 2.6, 2.7

* Loads more reactions when scrolling.

* Handles keyboard navigation for sticker grid * @see Requirements 8.12

* Helper: place a collapsed cursor at the start of the contenteditable.

* Removes an option from the poll. * Minimum 2 options required. * @param index - The index of the option to remove * @see Requirements 1.7,

* Resolve the effective search scopes. * Empty array means both scopes are active.

* Switches the active tab and resets navigation state. * Clears side panel, thread views, and overlay pages (new chat, * create group, join grou

* Sets the selected user as the active chat entity. * Delegates to UIKit's ChatStateService which handles * mutual exclusivity (clears active gr

* Simulate arrow down navigation

* Simulate click with stopPropagation

* Simulates the component's event emission behavior for onItemClick. * Mirrors the component's handleConversationClick method.

Simulates a state transition and triggers announcement

Toggle bold formatting. @see Requirement 2.1

* Toggle the expanded/collapsed state for multiple files. * * @remarks * When expanding, sets focus on the collapse control after a short del

Toggle italic formatting. @see Requirement 2.2