feat(wallet): persist history and surface pending sends

Add an encrypted SQLite transaction history cache with cached tip metadata and
per-address shielded scan progress so startup and full refreshes avoid
re-scanning every z-address while still invalidating on wallet/address/rescan
changes.

Improve wallet history loading by paging transparent transactions, preserving
cached shielded and sent rows, keeping recent/unconfirmed activity visible, and
classifying mining-address receives. Show z_sendmany opid sends immediately in
History and Overview, pin pending rows through refreshes, and apply optimistic
address/balance debits until opids resolve.

Add timestamped RPC console tracing by source/method without logging params or
results, reduce redundant refresh/RPC calls, and cache Explorer recent block
summaries in SQLite.

Expand focused tests for transaction cache encryption, scan-progress
persistence/invalidation, history preservation, operation-status parsing,
pending send visibility, and Explorer/RPC refresh behavior.

src/ui/windows/console_tab.h

@@ -26,7 +26,7 @@ namespace ui {
 class ConsoleTab {
 public:
     ConsoleTab();
-    ~ConsoleTab() = default;
+    ~ConsoleTab();
     
     /**
      * @brief Render the console tab
@@ -46,6 +46,7 @@ public:
      * @brief Add a line to the console output
      */
     void addLine(const std::string& line, ImU32 color = IM_COL32(200, 200, 200, 255));
+    void addRpcTraceLine(const std::string& source, const std::string& method);
     
     /**
      * @brief Clear console output
@@ -69,6 +70,9 @@ public:
     // Show only error messages (filter toggle)
     static bool s_errors_only_enabled;
 
+    // Show app RPC calls made through RPCClient (method/source only)
+    static bool s_rpc_trace_enabled;
+
     /// Refresh console text colors for current theme (call after theme switch)
     static void refreshColors();
     
@@ -78,6 +82,7 @@ public:
     static ImU32 COLOR_ERROR;
     static ImU32 COLOR_DAEMON;
     static ImU32 COLOR_INFO;
+    static ImU32 COLOR_RPC;
     
 private:
     struct ConsoleLine {
@@ -129,6 +134,13 @@ private:
     float output_scroll_y_ = 0.0f;    // Track scroll position for selection
     ImVec2 output_origin_ = {0, 0};   // Top-left of output area
     float output_line_height_ = 0.0f; // Text line height (for scanline alignment)
+
+    struct ScanlineRow {
+        float yTop = 0.0f;
+        float yBot = 0.0f;
+        int rowIndex = 0;
+    };
+    std::vector<ScanlineRow> scanline_rows_;
     
     std::mutex lines_mutex_;