FrameView class

FrameView – Composable frame rendering for terminal views.

Eliminates the common boilerplate pattern found across views/prompts:

• Create FramedLayout
• Write top (with conditional bold)
• Write content lines with LineBuilder
• Write bottom border (conditionally)
• Write hints from KeyBindings

Before FrameView:

void render(RenderOutput out) {
  final lb = LineBuilder(theme);
  final frame = FramedLayout(title, theme: theme);

  out.writeln(theme.boldTitles
    ? '${theme.bold}${frame.top()}${theme.reset}'
    : frame.top());

  // ... 10+ lines of content setup ...

  if (theme.showBorders) {
    out.writeln(frame.bottom());
  }

  out.writeln(bindings.toHintsBullets(theme));
}

After FrameView:

void render(RenderOutput out) {
  final wf = FrameView(title: title, theme: theme, bindings: bindings);
  wf.render(out, (ctx) {
    ctx.line('Content line');
    ctx.gutterLine('Indented content');
  });
}

Features:

• Automatic themed frame (top/bottom borders)
• FrameContext provides LineBuilder + convenience methods
• Automatic hints from KeyBindings
• Connector line support
• Consistent styling across all views

Design principles:

• Composition over inheritance
• Separation of concerns (frame rendering vs view logic)
• Backward compatible (use alongside existing patterns)