v0.4.1

Fixed

• init_terminal NIF now cleans up raw mode and alternate screen on partial initialization failure
• All I/O-bound NIFs (init_terminal, restore_terminal, draw_frame, terminal_size) now run on the DirtyIo scheduler to avoid blocking normal BEAM schedulers
• App.render/2 callback typespec narrowed from term() to ExRatatui.widget() for proper Dialyzer coverage
• Constraint::Ratio with denominator zero now returns an error instead of panicking
• Gauge ratio now validates the value is finite, preventing a panic on NaN input
• App.mount/1 callback typespec now includes {:error, reason} return
• ExRatatui.run/1 after block no longer masks the original exception if terminal restore also fails
• Server render errors now log the full stacktrace for easier debugging
• Added missing @impl true on fallback terminate/2 clause in the server
• ExRatatui.Frame struct defaults to width: 0, height: 0 instead of nil (typespec now matches actual usage)
• Deduplicated encode_constraint/1 — ExRatatui.Layout is now the single source of truth
• Fixed flaky poll_event tests that failed when terminal events arrived during the test run
• Event.Mouse typespec fields are now non-nullable to match actual NIF output
• Fixed system_monitor.exs to cache hostname between refreshes with Map.get_lazy/3
• Removed unnecessary Elixir. prefix from List calls in task_manager.exs example
• Added server tests for {:stop, state} from handle_info/2 and terminate/2 callback

Docs

• HexDocs "View Source" links now point to the correct version tag
• Expanded ExRatatui moduledoc with quick start, core API overview, and cross-references
• README demo GIF now uses an absolute URL so it renders on Hex.pm
• README modifiers list now shows all six supported modifiers
• Documented :test_mode option in ExRatatui.App for headless testing
• Clarified system_monitor.exs is Linux/Nerves only in README