order the selection card by what the player reads first

Six things the player reported, five of them about where things sit and what is
listed:

- HP goes to the top of the runtime group, above everything else a card shows.
  Only the HQ had it elsewhere; the ship and station cards already led with it.
- A construction site's progress moves out of the runtime group's place and
  directly under the header, so how far along the site is reads before what it
  is configured to become.
- The production bar moves between the input and output buffers, so a producing
  building reads in the direction its materials flow: what goes in, what is
  being made of it, what has come out. BufferSection held both buffer sections
  and so could not be split around it; the two sections and the production
  section are now the card's own, in that order.
- Locked items are left out of the buffers. An auto-recipe building's buffers
  are sized over every recipe of its type, so a Smelter carried an input for
  quartz -- which the player cannot mine yet -- and an output for the silicon it
  would smelt into. Both are dropped now, as everywhere else that hides what is
  not unlocked.
- An idle auto-recipe building lists what it handles rather than nothing. It has
  no selected recipe to name, so a Reprocessing Plant between cycles showed no
  output buffer at all. Its sections now list the unlocked items of every recipe
  of its type -- the union its buffers were sized over -- without a per-cycle
  denominator, since no one recipe is in force.

The sixth was the bars vanishing whenever the window lost focus, to a modal
dialog or to another application. They were filled with the palette's current
highlight, and the palette follows the window's focus: the inactive group's
highlight sits close enough to the card's background to read as gone. They ask
for the active group by name now.

Measured on a freshly built Smelter, which is the case that showed three of
these at once:

  INPUT BUFFERS  0 Copper Ore | 0 Iron Ore | 0 Scrap
  PRODUCTION     idle
  OUTPUT BUFFER  0/2 Copper Ingot | 0/2 Iron Ingot

Quartz and silicon filtered out, production between the buffers, and an idle
building still saying what it handles.

Requirements updated for the ordering, the locked-item rule and the idle
auto-recipe listing (REQ-UI-SELECTION-CARD, REQ-UI-SINGLE-SELECTION,
REQ-UI-PRODUCTION-PROGRESS, REQ-UI-HQ-PANEL).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JcReq7hVk4KUPhTDKWAG7K

src/ui/selection/BarRow.cpp

@@ -50,9 +50,14 @@ public:
 protected:
     void paintEvent(QPaintEvent* /*event*/) override
     {
+        // The active group is asked for by name rather than taken from the current one,
+        // which follows the window's focus: the inactive group's highlight is close
+        // enough to the card's background that the bar reads as gone whenever the game
+        // is tabbed away from or a modal dialog holds focus -- exactly when a player
+        // watching a build finish is most likely to be looking at it.
         const QColor fill = m_fillColor.isValid()
             ? m_fillColor
-            : palette().color(QPalette::Highlight);
+            : palette().color(QPalette::Active, QPalette::Highlight);
 
         QColor track = fill;
         track.setAlpha(kTrackAlpha);