<b>Status bar and diagnostics</b>

The status bar is two tiers. The bar itself is one glance line — the state, the rate and the
window — and everything else is behind the ⓘ button at its right-hand end.

<b>How to reach it</b>

The bar is always visible under the plot. Click <b>ⓘ</b> for the detail popover.

<b>Worth knowing</b>

• The badge is one glyph in three colours: lit and dim alternating means data is arriving, and a
  steady idle colour means it is not. A badge that never blinks is not a working badge.
• The state field is one word from a fixed set: <tt>live</tt>, <tt>paused</tt>, <tt>armed</tt>,
  <tt>capturing</tt>, <tt>event held</tt>, <tt>disarmed</tt>. In trigger mode the bar adds
  exactly one more field, how long ago the last event was.
• Nothing on the bar may change width with the stream, because the bar sits directly above the
  plot and a wider label would relayout it. That is why the rate collapses to one figure or a
  range rather than listing per channel, and why an elapsed time steps to a coarser unit instead
  of growing digits.
• <tt>gaps</tt> counts packets the receiver knows it missed. It is the number that matters: a
  non-zero count means samples are absent from the buffer, not merely late.
• <tt>reconnects</tt> counts sessions re-established with the source. Over unicast a climbing
  count usually means a second client is taking the source's single session.
• The starvation notice — <i>connected, but no new frames in the last second</i> — is that same
  situation seen from the other side. Pointing the app at a port where nothing answers produces
  it too.
• <tt>stored</tt> versus <tt>wire</tt> in the popover is the decimation. They differ exactly
  when the window is too long to store at full rate.

<b>Example</b>

The bar reads <tt>● live · 10.0 kS/s · 2 s window</tt>. Behind ⓘ:
<tt>Stream  connected, configured / packets 717 · frames 716 · gaps 0 / 3 signals · 3 channels</tt>,
<tt>Buffer  200.0 MB · 1677 s span · time x1 / stored 10.0 kS/s (wire 10.0 kS/s)</tt>,
<tt>Plot 1  3 traces · 195000 samples</tt>, <tt>Reconnects  0</tt>.
