fix(ui): console-commands modal slide + wallets footer clipping

Two follow-ups to the modal float work:

- Console RPC command reference (renderCommandsPopup) had the SAME auto-height
  feedback bug as Wallets: BlurFloat with no cardHeight, and its fill-height
  command list read GetContentRegionAvail() inside the AutoResizeY child ->
  self-referential, sliding content off-screen after a monitor move. Give it a
  FIXED viewport-relative cardHeight (fills ~84% of the viewport). Also removed
  its duplicate body H6 heading (the framework h6 title already shows it) —
  missed earlier because it's spec-form, not the positional overload.

- Wallets footer clipping: after the fixed-height conversion the content child
  clips overflow (NoScrollbar), and the hardcoded 130*dp reserve below the table
  was too small for the create/add-folder rows + separator + footer (~160*dp),
  so the buttons clipped — worse at 150%. Compute the reserve from real widget
  metrics (GetFrameHeightWithSpacing + caption height) so it holds at any DPI.

Added a modal-console-commands sweep surface (debug-gated ConsoleTab setter) so
the popup is captured. Verified both at 100% and font_scale 1.5 (150%): footers
on-screen, single headings, lists fill, nothing clipped.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/ui/windows/console_tab.cpp

@@ -1391,13 +1391,15 @@ void ConsoleTab::renderCommandsPopup()
     ov.title = TR("console_rpc_reference"); ov.p_open = &show_commands_popup_;
     ov.style = material::OverlayStyle::BlurFloat;   // floating content on the blur, plain heading
     ov.cardWidth = popW; ov.cardBottomViewportRatio = 0.94f;   // keep authored width
+    // FIXED height (fills most of the viewport) instead of auto-height: the command list's
+    // fill-height child reads GetContentRegionAvail() inside the dialog child, which is only stable
+    // when the child is fixed-height. Auto-height made it self-referential and it slid content
+    // off-screen after a monitor move (same class of bug as the Wallets modal).
+    ov.cardHeight = ImGui::GetMainViewport()->Size.y * 0.84f / Layout::dpiScale();
     if (!material::BeginOverlayDialog(ov)) {
         return;
     }
 
-    Type().text(TypeStyle::H6, TR("console_rpc_reference"));
-    ImGui::Dummy(ImVec2(0, Layout::spacingSm()));
-    
     // Search filter
     static char cmdFilter[128] = {0};
     ImGui::SetNextItemWidth(-1);