Christian Visintin 6252df2959 build: migrate to tui-realm 4.0 ...

Upgrade tuirealm (3.x -> 4.0.0), tui-realm-stdlib (3 -> 4), tui-term
(0.2 -> 0.3). Apply all breaking changes from the 4.0 migration guide
across the termscp UI.

Key changes:

- Root-level re-exports removed; imports moved to module-qualified
  paths (`tuirealm::application`, `::component`, `::event`, `::props`,
  `::state`, `::subscription`, `::listener`, `::ratatui`). Same for
  stdlib component types (`tui_realm_stdlib::components::*`).
- `MockComponent` trait renamed to `Component`; old `Component` trait
  renamed to `AppComponent`. `#[derive(MockComponent)]` is now
  `#[derive(Component)]`. `Component::on` now takes `&Event<_>`.
- `TextSpan` replaced with `SpanStatic`/`LineStatic`/`TextStatic`
  (ratatui-based); tuple `(String, Alignment)` titles replaced with
  the new `Title` builder; `Alignment` split into
  `HorizontalAlignment`/`VerticalAlignment`; stdlib components use
  `.alignment_horizontal` instead of `.alignment`.
- `State::One`/`PropPayload::One` -> `Single`. `CmdResult::None`
  -> `NoChange`. `Props::get_or` removed; `Props::get` now returns a
  borrowed `Option<&AttrValue>` (call sites switched to
  `.and_then(AttrValue::as_*)`). `Component::query` returns
  `Option<QueryResult<'a>>`.
- `Attribute::HighlightedColor` -> `HighlightStyle` (a full `Style`).
  `.highlighted_*` helpers renamed to `.highlight_*`.
- `PollStrategy::UpTo(n)` now requires a `Duration`; tick timeout moved
  from `EventListenerCfg::poll_timeout` into `PollStrategy`.
- `TerminalBridge` removed; `Context` now holds
  `CrosstermTerminalAdapter` directly and enables raw mode + alternate
  screen explicitly. The `TerminalAdapter` trait is imported where its
  methods are used.
- `Update` trait removed; activity `update` methods are plain inherent
  functions.
- `ProgressBar` replaced by stdlib `Gauge`. Paragraph `.wrap` renamed
  to `.wrap_trim`; `.text` now takes an `Into<Text>`. Stdlib `List` row
  items are now individual lines (`Vec<Span>` per row) rather than a
  `Table` of spans; custom `FileList`/`Log` convert between the two
  models.
- Radio builders drop `.foreground(color)` so unselected items render
  with the terminal default foreground, and set
  `highlight_style(Style::default().fg(color).add_modifier(REVERSED))`
  so the selected entry is visibly highlighted only with the theme
  color.
- Custom `FileList` keeps the selected row highlighted with the full
  highlight style when focused and falls back to a foreground-only
  style when unfocused.
- Theme loading is now backwards compatible: `Theme` uses a custom
  `Deserialize` through an intermediate `ThemeFile` with optional
  fields, so missing keys, unknown values or legacy aliases
  (`transfer_progress_bar_full`/`_partial`) fall back to defaults on a
  per-field basis instead of failing the whole load.

2026-04-19 01:54:46 +05:30

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