BT410: session landing -- the cockpit at 98.9% identical, four heads exact

Final per-head state, the binding audit (31 CFG bindings resolve, zero NULL),
and the open list in priority order: btl4vid for the sec head, then the
leak-gauge hatch (with the CFG parameter-order question that probably
explains it), the coolant numerals, and the MFD remainders.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

restoration/source410/BT_L4/GAUGE-BLOCK.NOTES.md

@@ -860,3 +860,65 @@ WHAT IS LEFT, LARGEST FIRST:
     we never build at all.  Zero extra means nothing we draw there is wrong,
     so this is a build-it wave, not a fix-it one.
   * Heat (483 / 80) and the MFD remainders (~270 / ~34) -- fine detail.
+
+--------------------------------------------------------------------------------
+5.3.39 -- THE COMM PAGE GOES EXACT, and what the session leaves open
+--------------------------------------------------------------------------------
+Final state of the cockpit against the shipped 4.10 binary:
+
+    head      shipped     ours   missing    extra
+    Eng1        17981    17981         0        0    EXACT
+    Eng2        17981    17981         0        0    EXACT
+    Eng3        17981    17981         0        0    EXACT
+    Comm        15656    15656         0        0    EXACT
+    Mfd3        32146    32128        31       13
+    Mfd2        40799    40716        97       14
+    Mfd1        41784    41651       140        7
+    overlay      3283     3310        55       82
+    Heat        21374    20971       483       80
+    sec         35423    35676       417      670    (the 3-D scene)
+
+Whole frame: 98.9% pixel-identical / 99% coverage, from 89.7% / 92%.
+
+THE COMM FIX closed the last artifact this session opened with.  Slot 0 of
+PilotList is the OWN ROW, not a roster slot -- its layout entry is the odd
+one out ({180,225} at layout mode 0, KILLS/DEATHS at +0x95/+0xe8 against the
+strip boxes' +0x48) and the shipped page fills it with the local pilot while
+the seven strip boxes stay empty in a solo mission.  The original ungated
+walk was feeding the mission player into the STRIP slots, which is exactly
+why gating the roster removed wrong pixels yet left the centre row missing:
+both halves of that puzzle were true at once.  The own row also takes
+Mission's LARGE name raster, not the small one -- with the small one
+"Aeolus" drew visibly undersized and low in its box.
+
+BINDING AUDIT (BT_GAUGE_ATTR_LOG, this build): 31 CFG bindings resolve, ZERO
+NULL.  Every attribute the cockpit config asks for is live.  Note the audit
+only covers the CFG parse path (GAUGREND ParseAttribute) -- the clusters'
+own ScalarAttributeOf calls do not appear there, though all four heat names
+they ask for (CurrentTemperature / DegradationTemperature /
+FailureTemperature / CoolantMassLeakRate) are published in HEAT.CPP.
+
+WHAT IS STILL OPEN, IN THE ORDER I WOULD TAKE THEM:
+
+  1. sec (417 missing / 670 extra) -- the 3-D scene head.  This is btl4vid,
+     the world renderer, and no amount of gauge work moves it.  The next big
+     climb, and the last one.
+
+  2. The leak-gauge hatch (~480px, and the bulk of what is left on Heat and
+     the MFDs).  Shipped paints a small hatched block at the foot of every
+     LEAK column; ours paints nothing.  At zero leak BitMapInverseWipe takes
+     its level<1 branch and draws frame 0 in colorA -- and colorA is 0 at
+     every call site, cluster and CFG alike.  Worth checking the CFG
+     parameter order before touching the widget: the config passes
+     LeakGauge(port, mode, eleak.pcc, 0, 255, 3, .15, @6), i.e. TWO values
+     between the colours and the attribute, while our ctor takes
+     (color_a, color_b, third_in, frames_in, value) with the cluster sites
+     passing third=0, frames=3.  If Make maps those positionally the .15 and
+     the 3 may be landing in the wrong parameters, which would also explain
+     fullWidth clamping every level to 0.
+
+  3. The COOLANT A / S numerals on the Heat head (shipped reads 300 and 33x;
+     ours differ) -- a heat-model value question, not a rendering one.
+
+  4. MFD remainders: ~270 missing / ~34 extra across the three heads, mostly
+     the same leak hatch as (2).