v0.5.0

Added

• ExRatatui.Widgets.Tabs — a tab bar widget for switching between views, with customizable selection highlight, divider, and padding
• ExRatatui.Widgets.Scrollbar — a scrollbar widget for indicating scroll position, supporting all four orientations (vertical right/left, horizontal bottom/top)
• ExRatatui.Widgets.LineGauge — a thin single-line progress bar using line-drawing characters, with separate filled/unfilled styles
• ExRatatui.Widgets.Checkbox — a checkbox widget for boolean toggles, with customizable checked/unchecked symbols and styles
• ExRatatui.Widgets.TextInput — a single-line text input widget with cursor navigation, viewport scrolling, and placeholder support. First stateful widget — state lives in Rust via ResourceArc
• Example: widget_showcase.exs — interactive demo with tabs, progress bars, checkboxes, text input, scrollable logs, and scrollbar (replaces individual tabs_demo.exs, scrollbar_demo.exs, line_gauge_demo.exs)
• Doctests for Tabs, Scrollbar, LineGauge, and Checkbox struct modules
• Updated task_manager.exs example to use Tabs (header), LineGauge (progress), Scrollbar (task table), and TextInput (new task creation — replaces hand-rolled input buffer with proper cursor navigation, viewport scrolling, and placeholder support)
• Updated examples/task_manager/ App to use Tabs (filter bar with Tab/Shift+Tab navigation), LineGauge (replaces Gauge), Scrollbar (task table), and TextInput (replaces hand-rolled input buffer)
• Comprehensive TextInput state management tests: get/set value, cursor positioning, backspace, delete, left/right, home/end, and mid-text insertion

Fixed

• Checkbox moduledoc now correctly states that :checked_symbol and :unchecked_symbol default to nil (rendered as "[x]" / "[ ]" by the Rust backend)
• Removed redundant .padding() call in Rust tabs renderer that was always overwritten