Lift the sign-off DRAFT note, fix footer/cursor CLAUDE.md overclaim, honest-en the readout-width test, trim duplicated rationale

Removed DRAFT marker on approved readout strings; corrected "paint and cursor cannot disagree" to note drag-cue suppression; renamed the width test to state it only bounds character count, not pixels; trimmed restated rationale to its CLAUDE.md/header home.

tests/test_footer_bar.cpp

@@ -265,9 +265,8 @@ static void testActiveSegmentStaysLiveEvenWhenUnroutable() {
 // --- The readout: count, and the drain's pre-emption of it -------------------
 
 static void testIdleReadsTheCountAndNeitherDrainString() {
-    // Idle is the whole no-work-moving family — an empty queue, an item inside its park
-    // debounce, one held by the transport, one held by an open undo block. The readout
-    // cannot tell them apart and must show the count in every one of them.
+    // Idle covers the whole no-work-moving family: empty queue, park debounce, transport
+    // hold, open undo block — indistinguishable to this predicate (see footer_bar.h).
     CHECK(footerReadout(FxDrainState::Idle, 0) == "0 tracks");
     CHECK(footerReadout(FxDrainState::Idle, 1) == "1 track");
     CHECK(footerReadout(FxDrainState::Idle, 2) == "2 tracks");
@@ -294,11 +293,13 @@ static void testTheTwoDirectionsReadDifferently() {
     CHECK(footerReadout(FxDrainState::Online, 3) != footerReadout(FxDrainState::Offline, 3));
 }
 
-static void testDrainReadoutsFitTheCountBox() {
-    // They borrow the count box, so neither may be long enough to make the kit's
-    // end-ellipsis the normal case. Twelve glyphs is the default 64px box's rough capacity
-    // at the panel's smallest font; a longer string wants a wider box, not a silent
-    // truncation.
+static void testDrainReadoutsStayShort() {
+    // NOT a pixel-width bound. Font::Micro is proportional (~10px, DT_END_ELLIPSIS in
+    // shell/panel/draw_kit.cpp) and this pure footer_bar test links no LICE, so it cannot
+    // measure rendered glyph width without pulling shell drawing into core/ui, which the
+    // pure/shell split (core/ui/CLAUDE.md) forbids. This only catches a readout that grew
+    // unreasonably long in character count; a real overflow end-ellipsizes rather than
+    // breaking layout, so fit is confirmed by the DAW pass, not by this assertion.
     CHECK(std::string(kFxParkingReadout).size() <= 12);
     CHECK(std::string(kFxRestoringReadout).size() <= 12);
     CHECK(!std::string(kFxParkingReadout).empty());
@@ -326,7 +327,7 @@ int main() {
     testIdleReadsTheCountAndNeitherDrainString();
     testEachDirectionPreEmptsTheCount();
     testTheTwoDirectionsReadDifferently();
-    testDrainReadoutsFitTheCountBox();
+    testDrainReadoutsStayShort();
 
     if (g_fail == 0) std::printf("footer_bar: all tests passed\n");
     else std::printf("footer_bar: %d CHECK(s) FAILED\n", g_fail);