feat(effects): overlay-time live-framebuffer blur behind the portfolio modal

The acrylic system only blurred a frozen snapshot of the static app background. Add
an overlay-time re-capture so the Manage-portfolio modal blurs the LIVE tab content
behind it.

- AcrylicMaterial::captureLiveFramebuffer() (GL blit of FB 0 / DX11 CopyResource of the
  backbuffer + no-backend stub) mirrors captureBackgroundDirect but bypasses the
  dirtyFrames_ gate so it refreshes every frame the overlay is open, forcing a re-blur.
- ImGuiAcrylic::GetLiveCaptureCallback() returns a draw callback for it.
- market_tab: the modal inserts that callback (+ ImDrawCallback_ResetRenderState) at the
  START of its overlay draw list, before the backdrop, so the capture holds the app UI
  drawn below and the backdrop blurs it. On close, InvalidateCapture() re-captures the
  background so other glass panels don't keep blurring the stale live capture.
- Panel theme-effects are suppressed during the market render while the modal is open
  (their foreground-draw-list borders draw above all windows and would otherwise bleed
  over the overlay). Market tab body is rendered again (no longer skipped).
- Backdrop draws the acrylic at full strength (fallbackColor.w=1) over an opaque base so
  the blurred content reads clearly; lighter dim.

Design mapped via an Explore investigation of the capture/blur pipeline; compiles on
both OpenGL (Linux) and DX11 (Windows cross-build). Needs on-device visual verification.

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

src/ui/windows/market_tab.cpp

@@ -16,6 +16,8 @@
 #include "../material/colors.h"
 #include "../material/typography.h"
 #include "../material/project_icons.h"
+#include "../effects/theme_effects.h"
+#include "../effects/imgui_acrylic.h"
 #include "../../util/text_format.h"
 #include "../../embedded/IconsMaterialDesign.h"
 #include "../../util/platform.h"
@@ -410,6 +412,12 @@ static void RenderPortfolioEditor(App* app)
         ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoScrollWithMouse |
         ImGuiWindowFlags_NoNav | ImGuiWindowFlags_NoSavedSettings);
     ImDrawList* dl = ImGui::GetWindowDrawList();
+    // Capture the live UI drawn below this overlay (then reset ImGui's render state) so the backdrop
+    // blurs the live tab content, not the frozen wallpaper. Must precede the backdrop draw.
+    if (ImDrawCallback liveCap = effects::ImGuiAcrylic::GetLiveCaptureCallback()) {
+        dl->AddCallback(liveCap, nullptr);
+        dl->AddCallback(ImDrawCallback_ResetRenderState, nullptr);
+    }
     material::DrawFullWindowBlurBackdrop(dl, vpPos, ImVec2(vpPos.x + vpSize.x, vpPos.y + vpSize.y));
     ImGui::SetCursorScreenPos(vpPos);
     ImGui::InvisibleButton("##pfInputBlocker", vpSize,
@@ -933,8 +941,10 @@ static void RenderPortfolioEditor(App* app)
     if (!popupOpen && !ImGui::IsWindowAppearing() && ImGui::IsMouseClicked(ImGuiMouseButton_Left)
         && !ImGui::IsMouseHoveringRect(cardMin, cardMax))
         s_portfolio_editor_open = false;
-    // Commit named edits on any close path (X / Esc / outside-click); unnamed drafts are dropped.
-    if (!s_portfolio_editor_open) commitIfNeeded();
+    // Commit named edits on any close path (Esc / outside-click / Close); unnamed drafts are dropped.
+    // Also invalidate the acrylic capture so the background (not the last live capture) is re-captured
+    // for the other glass panels once the overlay is gone.
+    if (!s_portfolio_editor_open) { commitIfNeeded(); effects::ImGuiAcrylic::InvalidateCapture(); }
 
     ImGui::End();
     ImGui::PopStyleColor();
@@ -972,10 +982,11 @@ void RenderMarketTab(App* app)
     const auto& currentExchange = registry[s_exchange_idx];
     if (s_pair_idx >= (int)currentExchange.pairs.size()) s_pair_idx = 0;
 
-    // When the Manage-portfolio modal is open it fully covers the tab, so skip rendering the tab
-    // body (and its foreground theme effects, which would otherwise bleed over the overlay) — the
-    // modal floats on the app's blurred backdrop instead of the sharp tab content.
-    if (s_portfolio_editor_open) { RenderPortfolioEditor(app); return; }
+    // While the modal is open the overlay captures + blurs the live tab content behind it. Suppress
+    // panel theme-effects for this render so their foreground-draw-list borders don't bleed over the
+    // overlay (foreground draws above all windows). Restored after the modal is rendered.
+    bool fxSuppressed = s_portfolio_editor_open && effects::ThemeEffects::instance().isEnabled();
+    if (fxSuppressed) effects::ThemeEffects::instance().setEnabled(false);
 
     ImVec2 marketAvail = ImGui::GetContentRegionAvail();
     // Scrollable (the portfolio grid can extend past the window) but with no visible scrollbar —
@@ -1908,7 +1919,11 @@ void RenderMarketTab(App* app)
     }
 
     ImGui::EndChild(); // ##MarketScroll
-    // (When the editor is open the tab body is skipped above and the modal is rendered there.)
+
+    // Portfolio editor modal (rendered outside the scroll child so it overlays the page). It captures
+    // + blurs the live content drawn above, so it must render after the tab body.
+    RenderPortfolioEditor(app);
+    if (fxSuppressed) effects::ThemeEffects::instance().setEnabled(true);
 }
 
 } // namespace ui