feat(node): show a live daemon console tail on the initializing overlay

The full-node Console tab already streams the daemon's output, but during
startup the user is held on the loading overlay (wallet-data tabs are blocked),
so they can't watch progress without navigating away. Surface the last few
console lines the node printed (UpdateTip height=…, "Verifying blocks…", etc.)
directly under the status/description on the overlay while initializing or
warming up, so progress is visible where the user is already looking.

Full-node only (guarded on daemon_controller_); each line is trimmed and
ellipsis-truncated to one row. Reuses DaemonController::recentLines().

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app.cpp

@@ -3318,6 +3318,41 @@ void App::renderLoadingOverlay(float contentH)
         curY += ts.y + gap;
     }
 
+    // -------------------------------------------------------------------
+    // 2c. Live daemon console tail (init/warmup only) — show the last few lines the node
+    //     printed so the user can watch real progress (UpdateTip height=…, Verifying blocks…)
+    //     without leaving the blocked overlay. Full-node only (lite has no daemon_controller_).
+    // -------------------------------------------------------------------
+    if ((state_.daemon_initializing || state_.warming_up) && daemon_controller_) {
+        const auto lines = daemon_controller_->recentLines(4);
+        if (!lines.empty()) {
+            ImFont* logFont = Type().caption();
+            if (!logFont) logFont = ImGui::GetFont();
+            const float blockW = std::min(ws.x * 0.8f, 560.0f);
+            const ImU32 logCol = IM_COL32(140, 150, 165, 150);
+            curY += gap * 0.5f;
+            for (const auto& raw : lines) {
+                // Trim trailing CR/whitespace; skip blanks.
+                std::string line = raw;
+                while (!line.empty() && (line.back() == '\r' || line.back() == '\n' ||
+                                         line.back() == ' ' || line.back() == '\t'))
+                    line.pop_back();
+                if (line.empty()) continue;
+                // Truncate (with an ellipsis) to keep each line on one row within blockW.
+                if (logFont->CalcTextSizeA(logFont->LegacySize, FLT_MAX, 0.0f, line.c_str()).x > blockW) {
+                    while (line.size() > 1 &&
+                           logFont->CalcTextSizeA(logFont->LegacySize, FLT_MAX, 0.0f, (line + "…").c_str()).x > blockW)
+                        line.pop_back();
+                    line += "…";
+                }
+                dl->AddText(logFont, logFont->LegacySize,
+                            ImVec2(wp.x + cx - blockW * 0.5f, curY), logCol, line.c_str());
+                curY += logFont->LegacySize + 2.0f;
+            }
+            curY += gap;
+        }
+    }
+
     // -------------------------------------------------------------------
     // 3. Sync progress bar (if connected and syncing)
     // -------------------------------------------------------------------