fix(lite): always-populated Console (live status) + single-instance log

The Console could look empty if the wallet produced few events. Make it useful
in every state and remove a cross-platform footgun:

- Add a live status header read straight from the controller (connected /
  connecting / disconnected, sync %, and the last open error) — independent of the
  diagnostics event log, so the Console always shows the current connection +
  wallet-open state even when the log is sparse.
- Move LiteDiagnostics::instance() into a single .cpp so there is exactly one
  instance across the binary, rather than relying on the linker folding an
  inline-function static across translation units (a known fragility, especially
  on mingw/Windows — the most likely cause of a stuck-empty event log there).

Verified the writer and reader share one instance on Linux; builds clean for
full-node, lite, and Windows cross-compile; tests pass.

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

CMakeLists.txt

@@ -409,6 +409,7 @@ set(APP_SOURCES
     src/wallet/lite_rollout_policy.cpp
     src/wallet/lite_client_bridge.cpp
     src/wallet/lite_connection_service.cpp
+    src/wallet/lite_diagnostics.cpp
     src/wallet/lite_wallet_controller.cpp
     src/wallet/lite_result_parsers.cpp
     src/wallet/lite_sync_service.cpp
@@ -962,6 +963,7 @@ if(BUILD_TESTING)
         src/wallet/lite_rollout_policy.cpp
         src/wallet/lite_client_bridge.cpp
         src/wallet/lite_connection_service.cpp
+        src/wallet/lite_diagnostics.cpp
         src/wallet/lite_wallet_controller.cpp
         src/wallet/lite_result_parsers.cpp
         src/wallet/lite_sync_service.cpp

src/ui/windows/lite_console_tab.cpp

@@ -5,14 +5,17 @@
 #include "lite_console_tab.h"
 
 #include "../../app.h"
+#include "../../data/wallet_state.h"
 #include "../../util/i18n.h"
 #include "../../wallet/lite_diagnostics.h"
+#include "../../wallet/lite_wallet_controller.h"
 #include "../layout.h"
 #include "../material/type.h"
 #include "../material/colors.h"
 #include "imgui.h"
 
 #include <cstdint>
+#include <cstdio>
 #include <string>
 #include <vector>
 
@@ -45,7 +48,59 @@ ImU32 lineColor(const std::string& line)
 
 void RenderLiteConsoleTab(App* app)
 {
-    (void)app;
+    if (!app) return;
+
+    // ── Header ──────────────────────────────────────────────────────────────────
+    Type().text(TypeStyle::H6, TR("lite_console_title"));
+    Type().textColored(TypeStyle::Caption, OnSurfaceMedium(), TR("lite_console_intro"));
+    ImGui::Spacing();
+
+    // ── Live status (read straight from the controller — always meaningful, even if the
+    //    event log below is empty) ─────────────────────────────────────────────────
+    {
+        const wallet::LiteWalletController* lw = app->liteWallet();
+        const char* connText;
+        ImU32 connCol;
+        if (!lw) {
+            connText = "Lite backend unavailable";
+            connCol = Error();
+        } else if (lw->walletOpen()) {
+            connText = "Connected";
+            connCol = Success();
+        } else if (lw->openInProgress()) {
+            connText = "Connecting\xE2\x80\xA6";  // ellipsis
+            connCol = Warning();
+        } else {
+            connText = "Disconnected";
+            connCol = Error();
+        }
+        Type().textColored(TypeStyle::Overline, OnSurfaceMedium(), TR("lite_console_status"));
+        ImGui::SameLine();
+        Type().textColored(TypeStyle::Body2, connCol, connText);
+
+        if (lw && lw->walletOpen()) {
+            const SyncInfo& sync = app->state().sync;
+            char buf[96];
+            if (sync.syncing && !sync.isSynced()) {
+                double vp = sync.verification_progress;
+                if (vp < 0.0) vp = 0.0; else if (vp > 1.0) vp = 1.0;
+                std::snprintf(buf, sizeof(buf), "Syncing %.1f%%  (block %d / %d)",
+                              vp * 100.0, sync.blocks, sync.headers);
+            } else {
+                std::snprintf(buf, sizeof(buf), "Synced  (block %d)", sync.blocks);
+            }
+            Type().textColored(TypeStyle::Caption, OnSurfaceMedium(), buf);
+        }
+        // Surface the last open failure (e.g. server unreachable) prominently.
+        const std::string& openErr = app->liteOpenError();
+        if (!openErr.empty() && (!lw || !lw->walletOpen())) {
+            Type().textColored(TypeStyle::Caption, Error(),
+                               (std::string("Last error: ") + openErr).c_str());
+        }
+    }
+    ImGui::Spacing();
+
+    // Snapshot the event log (only when it changed).
     auto& diag = wallet::LiteDiagnostics::instance();
     const std::uint64_t gen = diag.generation();
     if (gen != s_cachedGeneration) {
@@ -53,11 +108,6 @@ void RenderLiteConsoleTab(App* app)
         s_cachedGeneration = gen;
     }
 
-    // ── Header ──────────────────────────────────────────────────────────────────
-    Type().text(TypeStyle::H6, TR("lite_console_title"));
-    Type().textColored(TypeStyle::Caption, OnSurfaceMedium(), TR("lite_console_intro"));
-    ImGui::Spacing();
-
     // ── Toolbar ─────────────────────────────────────────────────────────────────
     if (ImGui::Button(TR("lite_console_clear"))) diag.clear();
     ImGui::SameLine();
@@ -70,7 +120,7 @@ void RenderLiteConsoleTab(App* app)
     ImGui::Checkbox(TR("lite_console_autoscroll"), &s_autoScroll);
     ImGui::Spacing();
 
-    // ── Log (terminal-styled scroll region) ─────────────────────────────────────
+    // ── Event log (terminal-styled scroll region) ───────────────────────────────
     ImGui::PushStyleColor(ImGuiCol_ChildBg, IM_COL32(0, 0, 0, 90));
     ImGui::BeginChild("##LiteConsoleLog", ImVec2(0, 0), true,
                       ImGuiWindowFlags_HorizontalScrollbar);

src/util/i18n.cpp

@@ -1109,6 +1109,7 @@ void I18n::loadBuiltinEnglish()
         // --- Lite Network tab (server browser) ---
         strings_["lite_console_title"]      = "Console";
         strings_["lite_console_intro"]      = "Diagnostic log: server connections, wallet open/create, and sync events.";
+        strings_["lite_console_status"]     = "Status:";
         strings_["lite_console_clear"]      = "Clear";
         strings_["lite_console_copy"]       = "Copy";
         strings_["lite_console_autoscroll"] = "Auto-scroll";

src/wallet/lite_diagnostics.cpp

@@ -0,0 +1,19 @@
+// DragonX Wallet - ImGui Edition
+// Copyright 2024-2026 The Hush Developers
+// Released under the GPLv3
+
+#include "lite_diagnostics.h"
+
+namespace dragonx {
+namespace wallet {
+
+// Single definition in one translation unit guarantees exactly one shared instance across the
+// binary (writers in the controller/App, reader in the lite Console tab all see the same log).
+LiteDiagnostics& LiteDiagnostics::instance()
+{
+    static LiteDiagnostics inst;
+    return inst;
+}
+
+}  // namespace wallet
+}  // namespace dragonx

src/wallet/lite_diagnostics.h

@@ -24,10 +24,9 @@ namespace wallet {
 
 class LiteDiagnostics {
 public:
-    static LiteDiagnostics& instance() {
-        static LiteDiagnostics inst;
-        return inst;
-    }
+    // Defined in lite_diagnostics.cpp (a single TU) so there is exactly one instance across the
+    // whole binary — no reliance on the linker folding an inline-function static across TUs.
+    static LiteDiagnostics& instance();
 
     // Append a timestamped line (thread-safe). Safe to call from background threads.
     void log(const std::string& message) {